6801_OrangeCoMSWLF_2ndSemiGWMReport_DIN26933_20160209

Prepared for:

Prepared for:

Prepared by:

February, 2016
DAA No. R00592-163

ORANGE COUNTY SOLID WASTE MANAGEMENT
(NORTH FACILITY)
GROUNDWATER MONITORING PROGRAM
PERMIT NUMBER 68-01

SAMPLING EVENT 44: 11-10-15 + 11-11-15
RESULTS OF SAMPLING AND ANALYSIS

ORANGE COUNTY SOLID WASTE MANAGEMENT
P.O. Box 17177
Chapel Hill, North Carolina 27516
Draper Aden Associates
Engineering  Surveying  Environmental Services
8090 Villa Park Drive
Richmond, Virginia 23228
FACILITY
PERMIT WELL ID CAS
Number SWS ID PARAMETER RESULT UNITS QUALIFIER DILUTION
FACTOR
COLLECTION
DATE
EXTRACTION
DATE
ANALYSIS
DATE
REGULATORY
PROTECTION
STANDARD
SOURCE ANALYSIS*
68-01 6801-MW14A 75-34-3 75 1,1-Dichloroethane 4.0 ug/L J 1 11/11/2015 11/21/2015 11/21/2015 6 2L Impact from landfill; does not exceed SWSL
68-01 6801-MW16 75-34-3 75 1,1-Dichloroethane 2.3 ug/L J 1 11/11/2015 11/21/2015 11/21/2015 6 2L Impact from landfill; does not exceed SWSL
68-01 6801-MW14B 75-34-3 75 1,1-Dichloroethane 5.9 ug/L 1 11/11/2015 11/21/2015 11/21/2015 6 2L Impact from landfill; >FBAC
68-01 6801-MW15 75-34-3 75 1,1-Dichloroethane 6.3 ug/L 1 11/11/2015 11/21/2015 11/21/2015 6 2L Impact from landfill
68-01 6801-MW21D 75-34-3 75 1,1-Dichloroethane 9.2 ug/L 1 11/11/2015 11/21/2015 11/21/2015 6 2L Impact from landfill
68-01 6801-MW21S 75-34-3 75 1,1-Dichloroethane 8.2 ug/L 1 11/11/2015 11/21/2015 11/21/2015 6 2L Impact from landfill
68-01 6801-MW22 75-34-3 75 1,1-Dichloroethane 6.4 ug/L 1 11/11/2015 11/21/2015 11/21/2015 6 2L Impact from landfill
68-01 6801-MW23 75-34-3 75 1,1-Dichloroethane 15 ug/L 1 11/11/2015 11/21/2015 11/21/2015 6 2L Impact from landfill
68-01 6801-MW24 75-34-3 75 1,1-Dichloroethane 10 ug/L 1 11/11/2015 11/21/2015 11/21/2015 6 2L Impact from landfill
68-01 6801-MW23 75-35-4 77 1,1-Dichloroethene 0.57 ug/L J 1 11/11/2015 11/21/2015 11/21/2015 350 2L Impact from landfill; does not exceed SWSL
68-01 6801-MW15 95-50-1 69 1,2-Dichlorobenzene 0.64 ug/L J 1 11/11/2015 11/21/2015 11/21/2015 20 2L Impact from landfill; does not exceed SWSL
68-01 6801-MW14B 78-87-5 82 1,2-Dichloropropane 0.58 ug/L J 1 11/11/2015 11/21/2015 11/21/2015 0.6 2L Impact from landfill; does not exceed SWSL
68-01 6801-MW15 78-87-5 82 1,2-Dichloropropane 0.57 ug/L J 1 11/11/2015 11/21/2015 11/21/2015 0.6 2L Impact from landfill; does not exceed SWSL
68-01 6801-MW23 78-87-5 82 1,2-Dichloropropane 0.51 ug/L J 1 11/11/2015 11/21/2015 11/21/2015 0.6 2L Impact from landfill; does not exceed SWSL
68-01 6801-MW16 106-46-7 71 1,4-Dichlorobenzene 0.67 ug/L J 1 11/11/2015 11/21/2015 11/21/2015 6 2L Impact from landfill; does not exceed SWSL
68-01 6801-MW21S 106-46-7 71 1,4-Dichlorobenzene 0.51 ug/L J 1 11/11/2015 11/21/2015 11/21/2015 6 2L Impact from landfill; does not exceed SWSL
68-01 6801-MW14A 106-46-7 71 1,4-Dichlorobenzene 1.4 ug/L 1 11/11/2015 11/21/2015 11/21/2015 6 2L Impact from landfill; >FBAC
68-01 6801-MW14B 106-46-7 71 1,4-Dichlorobenzene 1.1 ug/L 1 11/11/2015 11/21/2015 11/21/2015 6 2L Impact from landfill; >FBAC
68-01 6801-MW15 106-46-7 71 1,4-Dichlorobenzene 7.1 ug/L 1 11/11/2015 11/21/2015 11/21/2015 6 2L Impact from landfill; >FBAC
68-01 6801-MW20 106-46-7 71 1,4-Dichlorobenzene 6.7 ug/L 1 11/11/2015 11/21/2015 11/21/2015 6 2L Impact from landfill; >FBAC
68-01 6801-MW21D 106-46-7 71 1,4-Dichlorobenzene 2.4 ug/L 1 11/11/2015 11/21/2015 11/21/2015 6 2L Impact from landfill; >FBAC
68-01 6801-MW22 106-46-7 71 1,4-Dichlorobenzene 2.3 ug/L 1 11/11/2015 11/21/2015 11/21/2015 6 2L Impact from landfill; >FBAC
68-01 6801-MW23 106-46-7 71 1,4-Dichlorobenzene 4.1 ug/L 1 11/11/2015 11/21/2015 11/21/2015 6 2L Impact from landfill; >FBAC
68-01 6801-MW04 7440-36-0 13 Antimony Total 0.237 ug/L J 1 11/10/2015 11/12/2015 11/16/2015 1 GWPS Naturally occurring; does not exceed SWSL
68-01 6801-MW06R 7440-36-0 13 Antimony Total 1.05 ug/L J 1 11/11/2015 11/12/2015 11/16/2015 1 GWPS Naturally occurring; does not exceed SWSL
68-01 6801-MW07R 7440-36-0 13 Antimony Total 0.548 ug/L J 1 11/11/2015 11/12/2015 11/16/2015 1 GWPS Naturally occurring; does not exceed SWSL
68-01 6801-MW14A 7440-36-0 13 Antimony Total 0.303 ug/L J 1 11/11/2015 11/12/2015 11/16/2015 1 GWPS Naturally occurring; does not exceed SWSL
68-01 6801-MW06R 7440-38-2 14 Arsenic Total 8.45 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 10 2L Naturally occurring; does not exceed SWSL; ASD approved 09-26-11
68-01 6801-MW22 7440-38-2 14 Arsenic Total 9.62 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 10 2L Naturally occurring; does not exceed SWSL; ASD approved 09-26-11
68-01 6801-MW23 7440-38-2 14 Arsenic Total 8.07 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 10 2L Naturally occurring; does not exceed SWSL; ASD approved 09-26-11
68-01 6801-MW24 7440-38-2 14 Arsenic Total 7.41 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 10 2L Naturally occurring; does not exceed SWSL; ASD approved 09-26-11
68-01 6801-MW07R 7440-38-2 14 Arsenic Total 10.5 ug/L 1 11/11/2015 11/16/2015 11/19/2015 10 2L Naturally occurring; does not exceed SWSL; ASD approved 09-26-11
68-01 6801-MW14A 7440-38-2 14 Arsenic Total 10.2 ug/L 1 11/11/2015 11/16/2015 11/19/2015 10 2L Naturally occurring; does not exceed SWSL; ASD approved 09-26-11
68-01 6801-MW14B 7440-38-2 14 Arsenic Total 15.5 ug/L 1 11/11/2015 11/16/2015 11/19/2015 10 2L Naturally occurring; does not exceed SWSL; ASD approved 09-26-11
68-01 6801-MW04 7440-39-3 15 Barium Total 65.5 ug/L J 1 11/10/2015 11/16/2015 11/19/2015 700 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW06R 7440-39-3 15 Barium Total 15.0 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 700 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW07R 7440-39-3 15 Barium Total 4.93 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 700 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW14A 7440-39-3 15 Barium Total 99.3 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 700 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW17 7440-39-3 15 Barium Total 25.8 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 700 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW21D 7440-39-3 15 Barium Total 2.86 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 700 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW21S 7440-39-3 15 Barium Total 1.93 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 700 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW22 7440-39-3 15 Barium Total 55.4 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 700 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW23 7440-39-3 15 Barium Total 5.37 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 700 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW24 7440-39-3 15 Barium Total 6.96 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 700 2L Naturally occurring; does not exceed SWSL
68-01 6801-SW1 7440-39-3 15 Barium Total 38.6 ug/L J 1 11/11/2015 11/16/2015 11/20/2015 700 2L Naturally occurring; does not exceed SWSL
68-01 6801-SW2 7440-39-3 15 Barium Total 47.2 ug/L J 1 11/11/2015 11/16/2015 11/20/2015 700 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW14B 7440-39-3 15 Barium Total 261 ug/L 1 11/11/2015 11/16/2015 11/19/2015 700 2L Naturally occurring; concentration less than FBAC (500 ug/l)
68-01 6801-MW15 7440-39-3 15 Barium Total 123 ug/L 1 11/11/2015 11/16/2015 11/19/2015 700 2L Naturally occurring; concentration less than FBAC (500 ug/l)
68-01 6801-MW16 7440-39-3 15 Barium Total 172 ug/L 1 11/11/2015 11/16/2015 11/19/2015 700 2L Naturally occurring; concentration less than FBAC (500 ug/l)
68-01 6801-MW20 7440-39-3 15 Barium Total 159 ug/L 1 11/11/2015 11/16/2015 11/19/2015 700 2L Naturally occurring; concentration less than FBAC (500 ug/l)
68-01 6801-MW16 71-43-2 16 Benzene 0.44 ug/L J 1 11/11/2015 11/21/2015 11/21/2015 1 2L Impact from landfill
68-01 6801-MW23 71-43-2 16 Benzene 0.40 ug/L J 1 11/11/2015 11/21/2015 11/21/2015 1 2L Impact from landfill
68-01 6801-MW14B 71-43-2 16 Benzene 1.2 ug/L 1 11/11/2015 11/21/2015 11/21/2015 1 2L Impact from landfill
68-01 6801-MW15 71-43-2 16 Benzene 1.2 ug/L 1 11/11/2015 11/21/2015 11/21/2015 1 2L Impact from landfill
68-01 6801-MW20 71-43-2 16 Benzene 5.0 ug/L 1 11/11/2015 11/21/2015 11/21/2015 1 2L Impact from landfill
GROUNDWATER CONSTITUENTS ATTAINING OR EXCEEDING THEIR GROUNDWATER QUALITY STANDARDS
CLIENT: THE COUNTY OF ORANGE
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
DATES OF SAMPLING: 11-10-15 + 11-11-15
FACILITY
PERMIT WELL ID CAS
Number SWS ID PARAMETER RESULT UNITS QUALIFIER DILUTION
FACTOR
COLLECTION
DATE
EXTRACTION
DATE
ANALYSIS
DATE
REGULATORY
PROTECTION
STANDARD
SOURCE ANALYSIS*
GROUNDWATER CONSTITUENTS ATTAINING OR EXCEEDING THEIR GROUNDWATER QUALITY STANDARDS
CLIENT: THE COUNTY OF ORANGE
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
DATES OF SAMPLING: 11-10-15 + 11-11-15
68-01 6801-MW04 7440-43-9 34 Cadmium Total 0.433 ug/L J 1 11/10/2015 11/16/2015 11/19/2015 2 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW06R 7440-43-9 34 Cadmium Total 0.594 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 2 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW24 7440-43-9 34 Cadmium Total 0.390 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 2 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW21D 124-38-9 413 Carbon dioxide 300000 ug/L D 5 11/11/2015 11/16/2015 11/16/2015 N/A N/A natural attenuation indicator
68-01 6801-MW23 124-38-9 413 Carbon dioxide 170000 ug/L D 5 11/11/2015 11/16/2015 11/16/2015 N/A N/A natural attenuation indicator
68-01 6801-MW21S 124-38-9 413 Carbon dioxide 168000 ug/L 1 11/11/2015 11/16/2015 11/16/2015 N/A N/A natural attenuation indicator
68-01 6801-MW24 124-38-9 413 Carbon dioxide 84000 ug/L 1 11/11/2015 11/16/2015 11/16/2015 N/A N/A natural attenuation indicator
68-01 6801-MW04 SW301 301 Chloride 5900 ug/L 1 11/10/2015 11/16/2015 11/16/2015 250000 2L natural attenuation indicator
68-01 6801-MW21D SW301 301 Chloride 70000 ug/L 1 11/11/2015 11/20/2015 11/20/2015 250000 2L natural attenuation indicator
68-01 6801-MW21S SW301 301 Chloride 63000 ug/L 1 11/11/2015 11/20/2015 11/20/2015 250000 2L natural attenuation indicator
68-01 6801-MW23 SW301 301 Chloride 130000 ug/L 1 11/11/2015 11/20/2015 11/20/2015 250000 2L natural attenuation indicator
68-01 6801-MW24 SW301 301 Chloride 74000 ug/L 1 11/11/2015 11/20/2015 11/20/2015 250000 2L natural attenuation indicator
68-01 6801-MW14A 108-90-7 39 Chlorobenzene 0.84 ug/L J 1 11/11/2015 11/21/2015 11/21/2015 50 2L Impact from landfill; does not exceed SWSL
68-01 6801-MW14B 108-90-7 39 Chlorobenzene 2.2 ug/L J 1 11/11/2015 11/21/2015 11/21/2015 50 2L Impact from landfill; does not exceed SWSL
68-01 6801-MW16 108-90-7 39 Chlorobenzene 0.47 ug/L J 1 11/11/2015 11/21/2015 11/21/2015 50 2L Impact from landfill; does not exceed SWSL
68-01 6801-MW20 108-90-7 39 Chlorobenzene 1.2 ug/L J 1 11/11/2015 11/21/2015 11/21/2015 50 2L Impact from landfill; does not exceed SWSL
68-01 6801-MW21D 108-90-7 39 Chlorobenzene 1.3 ug/L J 1 11/11/2015 11/21/2015 11/21/2015 50 2L Impact from landfill; does not exceed SWSL
68-01 6801-MW22 108-90-7 39 Chlorobenzene 2.6 ug/L J 1 11/11/2015 11/21/2015 11/21/2015 50 2L Impact from landfill; does not exceed SWSL
68-01 6801-MW15 108-90-7 39 Chlorobenzene 5.9 ug/L 1 11/11/2015 11/21/2015 11/21/2015 50 2L Impact from landfill; >FBAC
68-01 6801-MW23 108-90-7 39 Chlorobenzene 3.1 ug/L 1 11/11/2015 11/21/2015 11/21/2015 50 2L Impact from landfill; >FBAC
68-01 6801-MW14B 75-00-3 41 Chloroethane 0.88 ug/L J 1 11/11/2015 11/21/2015 11/21/2015 3000 2L Impact from landfill; does not exceed SWSL
68-01 6801-MW15 75-00-3 41 Chloroethane 1.6 ug/L J 1 11/11/2015 11/21/2015 11/21/2015 3000 2L Impact from landfill; does not exceed SWSL
68-01 6801-MW21D 75-00-3 41 Chloroethane 0.74 ug/L J 1 11/11/2015 11/21/2015 11/21/2015 3000 2L Impact from landfill; does not exceed SWSL
68-01 6801-MW23 75-00-3 41 Chloroethane 0.99 ug/L J 1 11/11/2015 11/21/2015 11/21/2015 3000 2L Impact from landfill; does not exceed SWSL
68-01 6801-MW14A 7440-47-3 51 Chromium Total 3.13 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 10 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW15 7440-47-3 51 Chromium Total 3.41 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 10 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW21D 7440-47-3 51 Chromium Total 7.84 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 10 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW24 7440-47-3 51 Chromium Total 3.83 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 10 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW21S 7440-47-3 51 Chromium Total 94.1 ug/L 1 11/11/2015 11/16/2015 11/19/2015 10 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW23 7440-47-3 51 Chromium Total 57.7 ug/L 1 11/11/2015 11/16/2015 11/19/2015 10 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW14A 156-59-2 78 cis-1,2-Dichloroethene 3.0 ug/L J 1 11/11/2015 11/21/2015 11/21/2015 70 2L Impact from landfill; does not exceed SWSL
68-01 6801-MW14B 156-59-2 78 cis-1,2-Dichloroethene 2.2 ug/L J 1 11/11/2015 11/21/2015 11/21/2015 70 2L Impact from landfill; does not exceed SWSL
68-01 6801-MW16 156-59-2 78 cis-1,2-Dichloroethene 1.9 ug/L J 1 11/11/2015 11/21/2015 11/21/2015 70 2L Impact from landfill; does not exceed SWSL
68-01 6801-MW22 156-59-2 78 cis-1,2-Dichloroethene 4.9 ug/L J 1 11/11/2015 11/21/2015 11/21/2015 70 2L Impact from landfill; does not exceed SWSL
68-01 6801-MW15 156-59-2 78 cis-1,2-Dichloroethene 97 ug/L 1 11/11/2015 11/21/2015 11/21/2015 70 2L Impact from landfill
68-01 6801-MW21D 156-59-2 78 cis-1,2-Dichloroethene 26 ug/L 1 11/11/2015 11/21/2015 11/21/2015 70 2L Impact from landfill; >FBAC
68-01 6801-MW21S 156-59-2 78 cis-1,2-Dichloroethene 17 ug/L 1 11/11/2015 11/21/2015 11/21/2015 70 2L Impact from landfill; >FBAC
68-01 6801-MW23 156-59-2 78 cis-1,2-Dichloroethene 70 ug/L 1 11/11/2015 11/21/2015 11/21/2015 70 2L Impact from landfill; >FBAC
68-01 6801-MW24 156-59-2 78 cis-1,2-Dichloroethene 17 ug/L 1 11/11/2015 11/21/2015 11/21/2015 70 2L Impact from landfill; >FBAC
68-01 6801-MW06R 7440-48-4 53 Cobalt Total 3.26 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 1 GWPS Naturally occurring; does not exceed SWSL; ASD approved 09-26-11
68-01 6801-MW16 7440-48-4 53 Cobalt Total 3.17 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 1 GWPS Naturally occurring; does not exceed SWSL; ASD approved 09-26-11
68-01 6801-MW17 7440-48-4 53 Cobalt Total 3.61 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 1 GWPS Naturally occurring; does not exceed SWSL; ASD approved 09-26-11
68-01 6801-SW1 7440-48-4 53 Cobalt Total 1.63 ug/L J 1 11/11/2015 11/16/2015 11/20/2015 1 GWPS Naturally occurring; does not exceed SWSL; ASD approved 09-26-11
68-01 6801-MW14A 7440-48-4 53 Cobalt Total 43.9 ug/L 1 11/11/2015 11/16/2015 11/19/2015 1 GWPS Naturally occurring; does not exceed SWSL; ASD approved 09-26-11
68-01 6801-MW14B 7440-48-4 53 Cobalt Total 30.8 ug/L 1 11/11/2015 11/16/2015 11/19/2015 1 GWPS Naturally occurring; does not exceed SWSL; ASD approved 09-26-11
68-01 6801-MW15 7440-48-4 53 Cobalt Total 27.3 ug/L 1 11/11/2015 11/16/2015 11/19/2015 1 GWPS Naturally occurring; does not exceed SWSL; ASD approved 09-26-11
68-01 6801-MW20 7440-48-4 53 Cobalt Total 15.7 ug/L 1 11/11/2015 11/16/2015 11/19/2015 1 GWPS Naturally occurring; does not exceed SWSL; ASD approved 09-26-11
68-01 6801-SW1 7440-50-8 54 Copper Total 1.76 ug/L J 1 11/11/2015 11/16/2015 11/20/2015 1000 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW14A 7440-50-8 54 Copper Total 13.9 ug/L 1 11/11/2015 11/16/2015 11/19/2015 1000 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW04 7439-89-6 340 Iron Total 151 ug/L J 1 11/10/2015 11/16/2015 11/19/2015 300 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW06R 7439-92-1 131 Lead Total 3.74 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 15 2L Naturally occurring; does not exceed SWSL; ASD approved 09-26-11
68-01 6801-MW14B 7439-92-1 131 Lead Total 3.44 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 15 2L Naturally occurring; does not exceed SWSL; ASD approved 09-26-11
68-01 6801-MW20 7439-92-1 131 Lead Total 7.42 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 15 2L Naturally occurring; does not exceed SWSL; ASD approved 09-26-11
68-01 6801-SW2 7439-92-1 131 Lead Total 3.21 ug/L J 1 11/11/2015 11/16/2015 11/20/2015 15 2L Naturally occurring; does not exceed SWSL; ASD approved 09-26-11
68-01 6801-MW24 7439-96-5 342 Manganese Total 92.1 ug/L B 1 11/11/2015 11/16/2015 11/19/2015 50 2L Naturally occurring; byproduct of potassium permanganate breakdown; cross-contamination "B"
FACILITY
PERMIT WELL ID CAS
Number SWS ID PARAMETER RESULT UNITS QUALIFIER DILUTION
FACTOR
COLLECTION
DATE
EXTRACTION
DATE
ANALYSIS
DATE
REGULATORY
PROTECTION
STANDARD
SOURCE ANALYSIS*
GROUNDWATER CONSTITUENTS ATTAINING OR EXCEEDING THEIR GROUNDWATER QUALITY STANDARDS
CLIENT: THE COUNTY OF ORANGE
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
DATES OF SAMPLING: 11-10-15 + 11-11-15
68-01 6801-MW21D 7439-96-5 342 Manganese Total 13.7 ug/L BJ 1 11/11/2015 11/16/2015 11/19/2015 50 2L Naturally occurring; byproduct of potassium permanganate breakdown; does not exceed SWSL
68-01 6801-MW21S 7439-96-5 342 Manganese Total 21.7 ug/L BJ 1 11/11/2015 11/16/2015 11/19/2015 50 2L Naturally occurring; byproduct of potassium permanganate breakdown; does not exceed SWSL
68-01 6801-MW23 7439-96-5 342 Manganese Total 40.5 ug/L BJ 1 11/11/2015 11/16/2015 11/19/2015 50 2L Naturally occurring; byproduct of potassium permanganate breakdown; does not exceed SWSL
68-01 6801-MW04 7439-96-5 342 Manganese Total 4.52 ug/L BJ 1 11/10/2015 11/16/2015 11/19/2015 50 2L Naturally occurring; byproduct of potassium permanganate breakdown; does not exceed SWSL
68-01 6801-MW21D 7439-97-6 132 Mercury Total 1.32 ug/L 1 11/11/2015 11/16/2015 11/17/2015 1 2L Possible landfill impact; naturally occurring; >FBAC
68-01 6801-MW21S 7439-97-6 132 Mercury Total 2.21 ug/L 1 11/11/2015 11/16/2015 11/17/2015 1 2L Possible landfill impact; naturally occurring; >FBAC
68-01 6801-MW23 7439-97-6 132 Mercury Total 3.67 ug/L 1 11/11/2015 11/16/2015 11/17/2015 1 2L Possible landfill impact; naturally occurring; >FBAC
68-01 6801-MW20 91-20-3 148 Naphthalene 3.2 ug/L J 1 11/11/2015 11/21/2015 11/21/2015 6 2L Impact from landfill; does not exceed SWSL
68-01 6801-MW07R 7440-02-0 152 Nickel Total 3.32 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 100 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW14A 7440-02-0 152 Nickel Total 7.04 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 100 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW15 7440-02-0 152 Nickel Total 13.5 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 100 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW16 7440-02-0 152 Nickel Total 2.85 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 100 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW21D 9-7-7440 377 Potassium Total 786 ug/L 1 11/11/2015 11/16/2015 11/19/2015 N/A N/A natural attenuation indicator
68-01 6801-MW21S 9-7-7440 377 Potassium Total 762 ug/L 1 11/11/2015 11/16/2015 11/19/2015 N/A N/A natural attenuation indicator
68-01 6801-MW23 9-7-7440 377 Potassium Total 1440 ug/L 1 11/11/2015 11/16/2015 11/19/2015 N/A N/A natural attenuation indicator
68-01 6801-MW24 9-7-7440 377 Potassium Total 1060 ug/L 1 11/11/2015 11/16/2015 11/19/2015 N/A N/A natural attenuation indicator
68-01 6801-MW20 7782-49-2 183 Selenium Total 1.38 ug/L J 1 11/11/2015 11/12/2015 11/16/2015 20 2L Naturally occurring; does not exceed SWSL; ASD approved 09-26-11
68-01 6801-MW21S 7782-49-2 183 Selenium Total 3.58 ug/L J 1 11/11/2015 11/12/2015 11/16/2015 20 2L Naturally occurring; does not exceed SWSL; ASD approved 09-26-11
68-01 6801-SW1 7782-49-2 183 Selenium Total 1.74 ug/L J 1 11/11/2015 11/12/2015 11/16/2015 20 2L Naturally occurring; does not exceed SWSL; ASD approved 09-26-11
68-01 6801-SW2 7782-49-2 183 Selenium Total 1.45 ug/L J 1 11/11/2015 11/12/2015 11/16/2015 20 2L Naturally occurring; does not exceed SWSL; ASD approved 09-26-11
68-01 6801-MW07R 7440-22-4 184 Silver Total 3.52 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 20 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW14A 7440-22-4 184 Silver Total 5.58 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 20 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW14B 7440-22-4 184 Silver Total 4.38 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 20 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW15 7440-22-4 184 Silver Total 5.91 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 20 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW17 7440-22-4 184 Silver Total 3.85 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 20 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW20 7440-22-4 184 Silver Total 3.69 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 20 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW21D 7440-22-4 184 Silver Total 3.84 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 20 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW21S 7440-22-4 184 Silver Total 3.51 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 20 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW22 7440-22-4 184 Silver Total 4.29 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 20 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW23 7440-22-4 184 Silver Total 3.62 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 20 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW24 7440-22-4 184 Silver Total 3.30 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 20 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW14B 18496-25-8 187 Sulfide 10 ug/L J 1 11/11/2015 11/16/2015 11/16/2015 1000 MDL Naturally occurring; does not exceed SWSL
68-01 6801-MW23 127-18-4 192 Tetrachloroethene 0.99 ug/L J 1 11/11/2015 11/21/2015 11/21/2015 0.7 2L Impact from landfill; does not exceed SWSL
68-01 6801-MW04 SW337 337 Total Alkalinity as CaCO3 21000 ug/L 1 11/10/2015 11/20/2015 11/20/2015 N/A N/A natural attenuation indicator
68-01 6801-MW15 156-60-5 79 trans-1,2-Dichloroethene 0.74 ug/L J 1 11/11/2015 11/21/2015 11/21/2015 100 2L Impact from landfill; does not exceed SWSL
68-01 6801-MW20 156-60-5 79 trans-1,2-Dichloroethene 0.40 ug/L J 1 11/11/2015 11/21/2015 11/21/2015 100 2L Impact from landfill; does not exceed SWSL
68-01 6801-MW23 156-60-5 79 trans-1,2-Dichloroethene 0.60 ug/L J 1 11/11/2015 11/21/2015 11/21/2015 100 2L Impact from landfill; does not exceed SWSL
68-01 6801-MW21D 79-01-6 201 Trichloroethene 0.49 ug/L J 1 11/11/2015 11/21/2015 11/21/2015 3 2L Impact from landfill; does not exceed SWSL
68-01 6801-MW23 79-01-6 201 Trichloroethene 0.82 ug/L J 1 11/11/2015 11/21/2015 11/21/2015 3 2L Impact from landfill; does not exceed SWSL
68-01 6801-MW04 7440-62-2 209 Vanadium Total 1.60 ug/L J 1 11/10/2015 11/16/2015 11/19/2015 0.3 GWPS Naturally occurring; does not exceed SWSL
68-01 6801-SW1 7440-62-2 209 Vanadium Total 5.64 ug/L J 1 11/11/2015 11/16/2015 11/20/2015 0.3 GWPS Naturally occurring; does not exceed SWSL
68-01 6801-SW2 7440-62-2 209 Vanadium Total 1.97 ug/L J 1 11/11/2015 11/16/2015 11/20/2015 0.3 GWPS Naturally occurring; does not exceed SWSL
68-01 6801-MW14A 75-01-4 211 Vinyl chloride 0.81 ug/L J 1 11/11/2015 11/21/2015 11/21/2015 0.03 2L Impact from landfill; does not exceed SWSL
68-01 6801-MW16 75-01-4 211 Vinyl chloride 0.93 ug/L J 1 11/11/2015 11/21/2015 11/21/2015 0.03 2L Impact from landfill; does not exceed SWSL
68-01 6801-MW24 75-01-4 211 Vinyl chloride 0.62 ug/L J 1 11/11/2015 11/21/2015 11/21/2015 0.03 2L Impact from landfill; does not exceed SWSL
68-01 6801-MW14B 75-01-4 211 Vinyl chloride 6.4 ug/L 1 11/11/2015 11/21/2015 11/21/2015 0.03 2L Impact from landfill
68-01 6801-MW15 75-01-4 211 Vinyl chloride 13 ug/L 1 11/11/2015 11/21/2015 11/21/2015 0.03 2L Impact from landfill
68-01 6801-MW21D 75-01-4 211 Vinyl chloride 3.0 ug/L 1 11/11/2015 11/21/2015 11/21/2015 0.03 2L Impact from landfill
68-01 6801-MW22 75-01-4 211 Vinyl chloride 1.8 ug/L 1 11/11/2015 11/21/2015 11/21/2015 0.03 2L Impact from landfill
68-01 6801-MW23 75-01-4 211 Vinyl chloride 4.9 ug/L 1 11/11/2015 11/21/2015 11/21/2015 0.03 2L Impact from landfill
68-01 6801-MW04 7440-66-6 213 Zinc Total 7.09 ug/L J 1 11/10/2015 11/16/2015 11/19/2015 1000 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW15 7440-66-6 213 Zinc Total 4.72 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 1000 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW20 7440-66-6 213 Zinc Total 6.78 ug/L J 1 11/11/2015 11/16/2015 11/19/2015 1000 2L Naturally occurring; does not exceed SWSL
68-01 6801-SW1 7440-66-6 213 Zinc Total 5.94 ug/L J 1 11/11/2015 11/16/2015 11/20/2015 1000 2L Naturally occurring; does not exceed SWSL
68-01 6801-MW06R 7440-66-6 213 Zinc Total 37.4 ug/L 1 11/11/2015 11/16/2015 11/19/2015 1000 2L Naturally occurring
FACILITY
PERMIT WELL ID CAS
Number SWS ID PARAMETER RESULT UNITS QUALIFIER DILUTION
FACTOR
COLLECTION
DATE
EXTRACTION
DATE
ANALYSIS
DATE
REGULATORY
PROTECTION
STANDARD
SOURCE ANALYSIS*
GROUNDWATER CONSTITUENTS ATTAINING OR EXCEEDING THEIR GROUNDWATER QUALITY STANDARDS
CLIENT: THE COUNTY OF ORANGE
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
DATES OF SAMPLING: 11-10-15 + 11-11-15
Yellow highlighted well indicates upgradient location
B - concentration is <5x constituent concentration detected in associated blank
MDL - method detection limit
Bold italicized values exceed their respective regulatory protection standard and associated section limit.
* Note: These analyses should be interpreted in the context of the groundwater sampling report for this event.
J - constituent was less than its Solid Waste Section Limit (SWSL)

ATTACHMENTS

1 FIGURES

2 MONITORING WELL NETWORK

3 GROUNDWATER ELEVATION DATA

4 GROUNDWATER VELOCITY CALCULATIONS

5 ORGANIC CONSTITUENTS

6 INORGANIC CONSTITUENTS

7 LABORATORY CERTIFICATE-OF-ANALYSIS

8 FIELD DATA

9 STATISTICAL ANALYSES

10 QUALITY CONTROL ASSESSMENT

11 CORRESPONDENCE

ATTACHMENT 1

FIGURES

LEGEND

N

SOURCE: USGS 7.5’ Quadrangle
Chapel Hill, NC
2013
Vicinity Topographic Map
Client Orange County Solid Waste Management
Facility North + South + Active C&D Landfills
Location Chapel Hill, North Carolina
Project Environmental Monitoring Programs
SCALE:

DAA NO.
[not shown]

R00597
DESIGNED
DRAWN
CHECKED
DATE
LNF
BHH
LNF
02-14-14
FIGURE
1A

approximate locations of facilities
active
C&D
old
C&D
North
South office

LEGEND

N

SOURCE: Google Earth
[image date 04-09-13]
Vicinity Aerial Photograph
Client Orange County Solid Waste Management
Facility North + South + Active C&D Landfills
Location Chapel Hill, North Carolina
Project Environmental Monitoring Programs
SCALE:

DAA NO.
[not shown]

R00597
DESIGNED
DRAWN
CHECKED
DATE
LNF
BHH
LNF
02-13-14
FIGURE
1B

approximate locations of facilities
old
C&D
North
South
active
C&D
ATTACHMENT 2

MONITORING WELL NETWORK

ATTACHMENT 2

GROUNDWATER MONITORING NETWORK

The well monitoring network associated with the North sanitary landfill consists of fourteen wells.

Upgradient: 6801-MW4
6801-MW6R

Downgradient:
6801-MW7R
6801-MW14A
6801-MW14B
6801-MW15
6801-MW16
6801-MW17
6801-MW20
6801-MW21S
6801-MW21D
6801-MW22
6801-MW23
6801-MW24

Note. Well 6801-MW04 is associated with both the C&D landfill and the North sanitary landfill.

Note. Well 6801-MW04 is upgradient of the North sanitary landfill waste management unit; well
6801-MW06R is upgradient of the closed C&D landfill waste management unit (which is separated
from the sanitary landfill by a stream).
NORTH SOUTH ACTIVE
Well LANDFILL LANDFILL C&D LANDFILL
6801-MW04 X X
6801-MW06R X
6801-MW07R X
6801-MW14A X
6801-MW14B X
6801-MW15 X
6801-MW16 X
6801-MW17 X
6801-MW20 X
6801-MW21D X
6801-MW21S X
6801-MW22 X
6801-MW23 X
6801-MW24 X
6801-MW101 X
6801-MW102DR X
6801-MW102S X
6801-MW103D X
6801-MW103S X
6801-MW104 X
6801-MW105 X
6801-MW106 X
6801-MW107 X
6801-MW111 X
6801-MW112 X
6801-MW110D X X
6801-MW110S X X
6804-MW204S X
6804-MW209 X
6804-MW210D X
6804-MW211R X
6801-SW1 X
6801-SW2 X
6804-SW1 X
leachate X
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: NORTH - SOUTH - C&D
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
MONITORING WELL NETWORK SUMMARY
total depth depth measured corrected elevation elevation elevation elevation
drilling diameter depth to top to top well well ground concrete measuring top steel
well type of date drilling method borehole borehole sand bentonite depth stickup depth surface pad point casing
designation well completed contractor (in inches)northing easting (in inches)(in feet)(in feet)(in feet)(in feet)(in feet)(in feet)(in feet)(in feet)(in feet)(in feet)
6801-MW1 2MW10 04-29-76 GEC 6" rotary 809703.65 1975572.45 8 36 18 16.3 36 1.80 37.8 504.15 505.95
6801-MW4 1.75MW10 10-31-80 SME 3.25 807250.43 1974944.46 6 53 39 38 53 2.33 55.3 547.66 549.99
6801-MW5 1.75MW10 11-03-80 SME 3.25 808192.87 1974945.72 6 18.1 5 4 18.1 1.75 19.9 522.04 523.79
6801-MW6 1.75MW10 11-05-80 SME 3.25 809820.13 1976569.38 6 28.5 15 14 28.5 1.10 29.6 516.23 517.33
6801-MW6R 2MW10 06-17-08 DDI 6" air rotary 809803.36 1976567.65 6 51 23.5 5 51 2.5 53.5 511.84 514.50
6801-MW7
6801-MW7R 2MW10 05-31-07 RSD 6" air rotary 808806.89 1977111.80 6 20 8 4 20 1.92 21.9 486.79 488.71
6801-MW13 2MW15 03-12-92 ETEC 6.25 + rotary 809459.00 1976157.24 9.25 23 6 4 23 2.96 26 495.18 498.14
6801-MW14A 2MW5 03-12-92 ETEC 6.25 808951.24 1976364.48 9.25 12 6 4 12 2.88 14.9 486.46 489.34
6801-MW14B 2MW14 03-12-92 ETEC 6.25 + rotary 808945.19 1976368.22 8 31.5 16 14 31.5 2.66 34.2 486.30 488.96
6801-MW15 2MW15 03-12-92 ETEC 6.25 + rotary 808376.68 1976958.21 8 28 8 6 28 2.36 30.4 481.29 483.65
6801-MW16 2MW20 06-29-89 EMA air rotary 807986.58 1976739.73 8 35 6.5 5.5 35 2.47 37.5 480.44 482.91
6801-MW17 2MW20 06-30-89 EMA air rotary 807869.32 1976301.73 8 50 22 21 50 2.54 52.5 492.83 495.37
6801-MW18 2MW20 06-23-89 EMA air rotary 807900.44 1975645.97 8 35 6 5 35 35 502.02
6801-MW20 2MW15 09-21-94 ETEC 6" air rotary 807974.11 1975680.42 8 45 28 24 45 3.43 48.4 526.00 529.43
6801-MW21S 2MW10 03-27-00 G & C rotary 808049.25 1977137.08 8 23 11 7 23 2.14 25.1 474.70 476.84
6801-MW21D 2MW10 03-24-00 G & C 4.25 + rotary 808041.46 1977132.91 8 53 41 37 53 1.55 54.6 474.86 476.41
6801-MW22 2MW10 03-25-00 G & C 4.25 + rotary 808915.13 1976521.36 8 63 58 46 63 1.92 64.9 481.56 483.48
6801-MW23 2MW10 05-31-07 RSD 6" air rotary 808277.99 1977098.69 6 30 13 8 30 2.23 32.2 476.62 478.85
6801-MW24 2MW10 06-17-08 DDI 6" air rotary 808212.67 1977145.27 6 36 38 5 36 2.40 38.4 475.45 477.73
Elevations expressed in feet above mean sea level, unless otherwise noted.
ELEVmp and ELEVgs are corrected to latest survey data (surveyed May, 1999; wells MW-21S, MW-21D, MW-22 were surveyed June, 2000; wells 6801-MW7R, MW-23 surveyed July, 2007; wells 6801-MW6R and MW-24
surveyed June, 2008)
R00592
ABANDONED (05-31-07)
WELL CONSTRUCTION DATA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
ATTACHMENT 3

GROUNDWATER ELEVATION DATA

ATTACHMENT 3

GROUNDWATER ELEVATION DATA

Static water elevations obtained during the subject sampling event indicate that well 6801-MW4
remains hydrogeologically upgradient from all municipal waste disposal units within the North
Facility and upgradient from all other wells associated with the North Facility.

During the subject sampling event, the elevation of the water table beneath the municipal waste
facility was found to vary from a high of 517.67 feet above mean sea level (upgradient monitoring
well 6801-MW4) to a low of 473.86 feet above mean sea level (downgradient monitoring well 6801-
MW21S).

A comparison of static water elevations obtained during the referenced sampling event with
those obtained during prior sampling events reveals no hydrogeologically significant changes in
directions of groundwater flow.
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
STATIC WATER LEVELS
DATE: 11-10-15 + 11-11-15
WELL ELEVmp DTW STICKUP DTWc ELEVgs ELEVgw
6801-MW1 505.95 1.80 504.15
6801-MW4 549.99 32.32 2.33 29.99 547.66 517.67
6801-MW5 523.79 1.75 522.04
6801-MW6 517.33 1.10 516.23
6801-MW6R 514.50 25.54 2.66 22.88 511.84 488.96
6801-MW7
6801-MW7R 488.71 10.30 1.92 8.38 486.79 478.41
6801-MW13 498.14 2.96 495.18
6801-MW14A 489.34 5.34 2.88 2.46 486.46 484.00
6801-MW14B 488.96 5.32 2.66 2.66 486.30 483.64
6801-MW15 483.65 5.95 2.36 3.59 481.29 477.70
6801-MW16 482.91 3.62 2.47 1.15 480.44 479.29
6801-MW17 495.37 9.02 2.54 6.48 492.83 486.35
6801-MW20 529.43 27.95 3.43 24.52 526.00 501.48
6801-MW21S 476.92 3.06 2.22 0.84 474.70 473.86
6801-MW21D 476.44 1.92 1.58 0.34 474.86 474.52
6801-MW22 483.46 2.10 1.90 0.20 481.56 481.36
6801-MW23 478.85 2.73 2.23 0.50 476.62 476.12
6801-MW24 477.73 3.08 2.28 0.80 475.45 474.65
Elevations expressed in feet above mean sea level.
Shaded cells indicate data not available
R00592 - 163
ABANDONED
DATE MW-01 MW-04 MW-05 MW-06 [old CDD]MW-06R [old CDD]MW-07 [old CDD]MW-07R [old CDD]MW-13 MW-14A MW-14B MW-15 MW-16 MW-17 MW-20 MW-21S MW-21D MW-22 [old CDD]MW-23 MW-24
ELEVgs 504.15 547.66 522.04 516.23 511.84 486.84 486.79 495.18 486.46 486.30 481.29 480.44 492.83 526.00 474.70 474.86 481.56 476.62 475.45
ELEVmp 505.95 549.99 523.79 517.33 514.50 489.66 488.71 498.14 489.34 488.96 483.65 482.91 495.37 529.43 476.92 476.44 483.46 478.85 477.73
01/03/90 499.24 521.61 511.79 491.79 482.06 478.45 484.56
04/16/90 500.61 523.57 511.66 493.58 481.24 478.12 484.54
07/17/90 494.12 521.28 506.25 491.37 475.95 475.79 482.27
10/29/90 493.99 516.65 506.29 490.25 479.99 477.91 483.70
01/30/91 495.16 518.32 510.41 491.62 481.17 478.04 485.33
07/11/91 494.12 518.74 506.29 489.83 476.53 476.91 482.95
11/14/91 493.12 515.07 505.37 488.58 475.66 476.66 481.95
05/28/92 494.45 516.82 507.62 491.33 477.00 487.22 482.09 481.79 475.65 476.74 482.70
10/27/92 491.78 514.24 505.71 489.17 475.33 486.48 482.01 481.63 475.15 475.91 481.29
02/23/93 498.62 516.82 512.29 492.50 481.50 488.14 483.21 482.80 476.73 478.25 485.54
06/30/93 494.12 520.07 506.37 492.75 476.99 487.06 481.92 481.38 477.07 476.49 482.70
10/28/93 491.54 516.67 486.83 482.22 481.93 476.33 476.39 481.66
01/24/94 494.72 516.76 509.97 492.76 481.04 487.72 483.09 482.73 478.01 480.77
09/21/94 497.43
11/03/94 492.95 516.84 477.01 487.13 483.06 482.15 477.05 477.23 482.37 495.81
12/20/94 493.80 516.14 505.78 488.44 476.88 487.52 483.30 482.34 477.63 477.58 482.92 497.08
02/02/95 494.32 516.39 505.87 489.13 479.71 487.83 483.02 482.63 478.08 478.49 484.65 497.93
03/13/95 496.10 518.02 511.67 492.51 482.16 488.21 483.09 482.78 477.35 478.66 486.06 498.63
11/15/95 496.95 518.59 509.87 491.81 482.21 488.23 483.07 482.74 477.38 478.74 486.08 499.08
07/25/96 492.81 521.56 505.90 491.87 474.99 486.92 481.62 481.36 475.03 475.56 481.64 498.68
02/25/97 497.05 521.62 511.38 493.41 480.11 487.94 481.64 482.71 476.77 478.04 485.92 499.98
09/03/97 490.44 519.74 505.84 489.18 474.66 486.61 479.74 480.99 474.02 473.61 480.75 498.23
05/04/98 497.21 524.30 509.76 493.91 478.91 487.80 481.31 482.35 476.35 477.64 484.73 500.08
R00592 - 163 488.03 518.27 504.69 487.98 474.66 486.29 480.01 481.05 473.65 474.03 479.92 497.33
04/26/99 494.64 519.63 507.19 490.61 478.14 487.64 481.06 482.31 476.44 477.41 483.67 499.58
11/22/99 494.60 520.70 509.25 490.86 478.21 487.71 482.59 482.50 476.37 477.66 483.64 499.68
05/23/00 495.23 522.28 509.95 492.43 478.04 488.02 482.58 482.43 476.14 477.49 484.32 499.93 472.45 473.22 480.52
11/29/00 493.95 518.42 508.48 488.96 474.84 486.97 482.14 481.96 475.33 476.49 482.76 498.71 472.12 472.44 479.26
06/05/01 494.55 519.57 510.52 489.82 477.99 487.72 482.55 482.22 476.19 477.91 484.06 499.28 472.50 473.08 479.73
11/13/01 492.55 515.86 506.39 488.03 474.74 486.42 481.43 481.33 474.15 474.97 480.37 497.83 470.91 470.94 478.15
06/04/02 490.90 515.89 507.87 487.63 474.66 486.66 481.42 481.04 475.03 476.01 480.97 497.83 470.70 470.99 478.42
03/13/03 492.52 518.74 513.07 481.50 488.63 482.92 482.74 477.40 478.79 485.96 500.43 474.88 473.00 480.95
06/19/03 495.73 521.57 514.49 492.14 479.14 488.24 482.81 482.66 477.67 478.46 485.37 500.72 472.97 473.72 480.64
12/08/03 494.17 519.49 514.04 488.63 475.94 488.13 482.62 482.26 475.97 477.19 483.17 499.71 472.38 472.79 479.55
06/22/04 493.45 519.56 508.38 486.94 481.86 481.46 475.08 476.41 482.06 499.70 471.74 470.54 479.36
11/30/04 495.00 518.09 512.51 488.04 482.96 482.63 476.67 478.21 484.48 500.13 473.09 473.74 480.16
06/01/05 494.90 518.43 509.88 490.18 475.76 487.34 482.39 481.84 475.60 476.91 482.85 499.93 471.67 472.19 479.46
11/02/05 489.75 515.43 507.17 474.59 486.94 481.52 481.16 473.70 475.99 481.05 498.80 470.72 469.59 477.84
05/22/06 493.45 516.59 510.39 487.14 482.47 481.86 474.60 476.63 482.50 499.23 471.42 471.84 477.54
11/27/06 494.04 515.12 513.38 489.06 477.53 488.65 483.03 482.68 477.05 478.70 485.34 499.46 473.24 473.95 481.04
06/13/07 493.65 517.85 509.06 489.23 474.59 488.84 482.19 481.83 475.46 476.24 485.54 499.82 471.08 471.50 479.27 472.84
12/12/07 488.14 512.44 512.02 488.86 473.61 486.39 481.79 480.84 472.65 473.77 479.85 498.78 469.42 468.69 477.91 469.70
06/10/08 492.44 515.55 510.20 489.17 474.90 487.49 482.40 481.96 474.76 476.63 482.32 500.13 471.19 471.63 479.53 472.85
11/05/08 491.86 514.54 509.48 486.62 474.21 487.49 482.71 482.36 475.74 476.90 482.04 506.04 472.60 471.41 476.74 473.15 471.87
05/19/09 517.14 512.14 482.86 482.34 475.92 476.11 483.42 500.40 471.72 472.23 480.06 473.83 471.11
11/18/09 493.75 514.85 511.55 486.20 476.31 488.40 483.11 482.78 476.62 478.21 484.55 500.12 472.76 473.09 480.34 474.31 472.51
06/21/10 518.72 510.98 488.92 475.41 482.74 482.78 475.69 476.71 483.12 499.50 470.90 471.69 479.88 473.20 471.87
11/18/10 515.04 509.85 486.89 473.11 482.91 482.64 475.08 476.24 482.32 499.38 471.44 471.51 479.62 472.32 471.08
05/23/11 516.54 511.91 487.13 475.01 482.54 482.82 476.13 477.11 483.28 500.28 471.69 472.01 480.21 473.45 472.09
11/15/11 513.17 485.89 471.75 482.34 482.42 473.90 475.50 481.76 499.28 470.37 469.54 478.81 471.18 469.99
06/05/12 516.81 487.48 475.51 483.24 482.92 476.27 477.10 483.04 500.33 471.68 471.98 480.32 473.55 472.13
11/12/12 515.97 485.97 474.16 483.04 483.03 476.03 476.98 482.81 500.31 471.89 472.12 480.34 473.12 471.75
05/13/13 517.75 488.27 477.51 483.77 483.28 476.74 477.88 484.41 500.83 472.18 473.39 480.84 475.01 473.15
08/21/13 472.16 473.10 475.46 473.09
11/11/13 518.54 489.28 474.81 483.38 483.12 475.76 476.94 482.99 500.66 471.74 472.20 480.40 473.35 472.23
02/10/14 472.31 473.41 475.07 473.78
05/12/14 521.11 490.92 479.05 483.62 482.04 476.37 477.77 484.67 501.53 470.97 473.12 480.86 475.12 473.65
08/18/14 470.86 471.69 472.93 471.47
11/11/14 516.49 486.36 472.91 482.94 482.76 474.35 475.86 482.39 499.86 471.17 471.09 479.38 471.88 470.53
05/12/15 520.04 490.60 477.86 483.56 483.11 476.38 477.46 484.42 501.20 471.46 472.92 480.81 474.80 473.18
11/10/15 517.67 488.96 478.41 484.00 483.64 477.70 479.29 486.35 501.48 473.86 474.52 481.36 476.12 474.65
MIN 488.03 512.44 504.69 487.63 485.89 474.59 471.75 486.29 479.74 480.84 472.65 473.61 479.85 495.81 469.42 468.69 476.74 469.70 469.99
MAX 500.61 524.30 514.49 493.91 490.92 482.21 479.05 488.84 484.00 483.64 478.08 479.29 486.35 506.04 474.88 474.52 481.36 476.12 474.65
MEAN 493.97 517.96 509.37 490.55 487.82 477.91 475.24 487.51 482.48 482.26 475.94 477.02 483.28 499.58 471.84 472.14 479.67 473.49 472.23
RANGE 12.58 11.86 9.80 6.28 5.03 7.62 7.30 2.55 4.26 2.80 5.43 5.68 6.50 10.23 5.46 5.83 4.62 6.42 4.66STD2.48 2.51 2.62 1.78 1.63 2.54 1.96 0.69 0.85 0.65 1.22 1.23 1.66 1.53 1.03 1.28 1.11 1.48 1.16
Elevations expressed in feet above mean sea level.Upgradient wells shaded yellow.All SWE data have been corrected to survey data obtained during May, 1999.- outlier removed
ELEV-mp and ELEV-gs derived from survey performed during May, 1999.
R00592 - 163
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINAPROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF STATIC WATER ELEVATIONS
465
470
475
480
485
490
495
500
505
510
515
520
525
530
El
e
v
a
t
i
o
n

(
f
e
e
t

a
b
o
v
e

s
e
a

l
e
v
e
l
)
Date
ORANGE COUNTY REGIONAL SANITARY LANDFILL -NORTH
STATIC WATER ELEVATIONS
MW-01 MW-04 MW-05 MW-06 [old CDD]MW-07 [old CDD]MW-13 MW-14A MW-14B MW-15
MW-16 MW-17 MW-20 MW-21S MW-21D MW-22 [old CDD]MW-23 MW-24
504
506
508
510
512
514
516
518
520
522
524
526
El
e
v
a
t
i
o
n

(
f
e
e
t

a
b
o
v
e

s
e
a

l
e
v
e
l
)
Date
ORANGE COUNTY REGIONAL SANITARY LANDFILL -NORTH
STATIC WATER ELEVATIONS
MW-04 MW-05
wells at upgradient (west)end of landfill
470
475
480
485
490
495
500
505
510
515
520
El
e
v
a
t
i
o
n

(
f
e
e
t

a
b
o
v
e

s
e
a

l
e
v
e
l
)
Date
ORANGE COUNTY REGIONAL SANITARY LANDFILL -NORTH
STATIC WATER ELEVATIONS
MW-05 MW-20 MW-17 MW-16
wells along south side of landfill
479.0
479.5
480.0
480.5
481.0
481.5
482.0
482.5
483.0
483.5
484.0
484.5
El
e
v
a
t
i
o
n

(
f
e
e
t

a
b
o
v
e

s
e
a

l
e
v
e
l
)
Date
ORANGE COUNTY REGIONAL SANITARY LANDFILL -NORTH
STATIC WATER ELEVATIONS
MW-14A MW-14B
472
473
474
475
476
477
478
479
480
El
e
v
a
t
i
o
n

(
f
e
e
t

a
b
o
v
e

s
e
a

l
e
v
e
l
)
Date
ORANGE COUNTY REGIONAL SANITARY LANDFILL -NORTH
STATIC WATER ELEVATIONS
MW-15 MW-16
wells near east end of waste unit
470
472
474
476
478
480
482
484
486
488
490
492
494
496
El
e
v
a
t
i
o
n

(
f
e
e
t

a
b
o
v
e

s
e
a

l
e
v
e
l
)
Date
ORANGE COUNTY REGIONAL SANITARY LANDFILL -NORTH
STATIC WATER ELEVATIONS
MW-06 [old CDD]MW-22 [old CDD]MW-07 [old CDD]MW-07R [old CDD]MW-06R [old CDD]
wells associated with old (closed) CDD waste unit
ATTACHMENT 4

GROUNDWATER VELOCITY CALCULATIONS

[BASED ON DATA PRESENTED IN ATTACHMENT 3]

ATTACHMENT 4

GROUNDWATER VELOCITY CALCULATIONS

The rate of at which constituents are transported in groundwater may be conservatively estimated
by the velocity of groundwater flow. We shall distinguish between the apparent Darcy groundwater
flow velocity (Vd) and seepage velocity (Vs), which are given by the equations:

Vd = ki

and

Vs = kin-1,

where:

Vd = Darcy velocity
Vs = seepage velocity
k = hydraulic conductivity
i = hydraulic gradient
n = porosity

On June 16, 2008, Draper Aden Associates personnel performed slug tests in the following wells:
6801-MW15, 6801-MW21S, 6801-MW21D, and 6801-MW23. Monitoring well 6801-MW15 is
partially screened within overburden, but mostly screened within bedrock. Monitoring wells 6801-
MW21S, 6801-MW21D, and 6801-MW23 are screened within bedrock.

The hydraulic conductivity values calculated from the slug test data are within the same
order of magnitude for the tested wells, ranging from 6.37 x 10-4 cm/sec to 1.34 x 10-4
cm/sec. The average hydraulic conductivity is 2.91 x 10-4 cm/sec. We have used the
average hydraulic conductivity value to calculate groundwater velocity.

Using published information, effective porosity was estimated to be about 0.02 (unitless) for
fractured (meta) basalt.

Using groundwater elevations measured during the subject sampling event, the hydraulic gradient
of the uppermost aquifer was calculated along the flow path from 6801-MW4 to 6801-MW21S.

The average hydraulic gradient was estimated by dividing the difference between the
hydraulic heads (elevation heads) in well 6801-MW4 to 6801-MW21S by the distance
between those two wells (about 2,336 feet).

Calculated velocities (along the selected flow path) are presented on the table at the end of this
ATTACHMENT, and illustrated on the accompanying graph.
Groundwater Velocity Calculations
Page 2

A comparison of groundwater velocity based upon the subject sampling event with those
obtained during prior sampling events (see table) indicates that the velocity observed during the
subject sampling event is approximately 3.3% less than the median velocity (along the selected
flow path).

A review of groundwater velocity over time (see graph) indicates that velocity generally
increased, between late 2011 and early 2014, but has generally decreased since then (along the
selected flow path).

We note that the calculated groundwater velocity along a given flow path represents an average
velocity along one of many potential flow paths, in the uppermost aquifer underlying the area of
interest. Nonetheless, the velocity estimate is believed to be reasonably representative of that area.
hydraulic hydraulic effective
well conductivity conductivity porosity*
designation (cm/sec)(m/sec)
6801-MW15 1.34E-04 1.34E-06 0.02
6801-MW21s 2.54E-04 2.54E-06 0.02
6801-MW21d 1.39E-04 1.39E-06 0.02
6801-MW23 6.38E-04 6.38E-06 0.02
* Fetter, C.W., 1988. Applied Hydrogeology, 2nd Edition.
HYDRAULIC PARAMETERS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: ORANGE COUNTY LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
from …… toward meters/meter meters/yr feet/yr
date upgradient location upgradient SWE downgradient location downgradient SWE gradient GW velocity GW velocity
11-15-11 6801-MW4 513.17 6801-MW21S 470.37 1.83E-02 84.1 275.8
06-05-12 6801-MW4 516.81 6801-MW21S 471.68 1.93E-02 88.6 290.8
11-12-12 6801-MW4 515.97 6801-MW21S 471.89 1.89E-02 86.6 284.1
05-13-13 6801-MW4 517.75 6801-MW21S 472.18 1.95E-02 89.5 293.7
11-11-13 6801-MW4 516.21 6801-MW21S 469.52 2.00E-02 91.7 300.9
5/12/2014 6801-MW4 521.11 6801-MW21S 470.97 2.15E-02 98.5 323.1
11/11/2014 6801-MW4 516.49 6801-MW21S 471.17 1.94E-02 89.0 292.1
5/12/2015 6801-MW4 520.04 6801-MW21S 471.46 2.08E-02 95.4 313.1
11/10/2015 6801-MW4 517.67 6801-MW21S 473.86 1.88E-02 86.1 282.3
hydraulic conductivity = 2.91E-4 cm/second median = 89.0 292.1
distance = 2,336 feet deviation from median =
R00592-163
-3.3%
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
GROUNDWATER VELOCITY CALCULATIONS
270
280
290
300
310
320
330
11-15-11 06-05-12 11-12-12 05-13-13 11-11-13 5/12/2014 11/11/2014 5/12/2015 11/10/2015
fe
e
t

p
e
r

y
e
a
r
date measured
OCSWM NORTH LANDFILL: GROUNDWATER VELOCITY
median
ATTACHMENT 5

SUMMARY OF ORGANIC CONSTITUENTS

ATTACHMENT 5

ORGANIC CONSTITUENTS

During November 10, and November 11, 2015 (sampling event 44), Sherrill Environmental, Inc.
(Sherrill) personnel obtained groundwater samples from fourteen groundwater monitoring wells at
the Orange County Solid Waste Management North Facility (north side of Eubanks Road).

 During event 44, the laboratory detected fourteen organic constituents, at concentrations
greater than their respective method detection limits (>MDLs): benzene, chlorobenzene,
chloroethane, 1,2-dichlorobenzene, 1,4-dichlorobenzene, 1,1-dichloroethane, 1,1-
dichloroethene, cis-1,2-dichloroethene, trans-1,2-dichloroethene, 1,2-dichloropropane,
naphthalene, tetrachloroethene, trichloroethene, vinyl chloride.

15A NCAC 13B.1634.(d).(1) states, “After obtaining the results from the initial or
subsequent sampling events required in Paragraph (b) of this Rule, the owner or operator
shall: (1) Within 14 days, notify the Division and place in the operating record identifying
the Appendix II constituents that have been detected ….”

We note that dichlorodifluoromethane and naphthalene represent “additional”
constituents listed in Appendix II, but not listed in Appendix I.

Of the sixteen organic constituents detected, six organic constituents exceeded their
respective Solid Waste Section Limits (>SWSLs): benzene, chlorobenzene, 1,4-
dichlorobenzene, 1,1-dichloroethane, cis-1,2-dichloroethene, vinyl chloride.

Of the six organic constituents that exceeded their respective Solid Waste Section Limits
(>SWSLs), the reported concentrations of five organic constituents exceeded their
respective North Carolina Groundwater Quality Standards:

 The reported concentrations of benzene in wells 6801-MW14B (1.2 µg/l), 6801-MW15
(1.2 µg/l), and 6801-MW20 (5.0 µg/l) exceeded its SWSL and its Groundwater Quality
Standard (1 µg/l; 2L Standard).

 The reported concentrations of 1,4-dichlorobenzene in wells 6801-MW15 (7.1 µg/l) and
6801-MW20 (6.7 µg/l) exceeded its SWSL and its Groundwater Quality Standard (6
µg/l; GWPS).

 The reported concentrations of 1,1-dichloroethane in wells 6801-MW15 (6.3 µg/l),
6801-MW21S (8.2 µg/l), 6801-MW21D (9.2 µg/l), 6801-MW22 (6.4 µg/l), 6801-
MW23 (15 µg/l), and 6801-MW24 (10 µg/l) exceeded its SWSL and its Groundwater
Quality Standard (6 µg/l; 2L Standard).

 The reported concentration of cis-1,2-dichloroethene in well 6801-MW15 (97 µg/l)
exceeded its SWSL and its Groundwater Quality Standard (70 µg/l; 2L Standard).
Organic Constituents
Page 2

 The reported concentrations of vinyl chloride in wells 6801-MW14B (6.4 µg/l), 6801-
MW15 (13 µg/l), 6801-MW21D (3.0 µg/l), 6801-MW22 (1.8 µg/l), and 6801-MW23
(4.9 µg/l) exceeded its SWSL and its Groundwater Quality Standard (0.03 µg/l; 2L
Standard).

15A NCAC 13B.1634.(f) states, “If one or more Appendix II constituents are detected
above the approved ground-water protection standards in any sampling event, the owner or
operator, shall within 14 days of this finding, submit a report to the Division, place a notice
in the operating record, and notify local government officials.”

Comments. Orange County Solid Waste Management has already characterized the nature and
extent of constituents that previously exceeded their respective Groundwater Quality Standards, and
prepared an Assessment of Corrective Measures, Corrective Action Plan, and Corrective Action
Monitoring Plan addressing such constituents (all of which were previously submitted to NCDENR
for review and approval).

Injection reports for areas in which remedial compounds are injected into the groundwater will
be submitted (under separate cover), in accordance with the injection permit that was issued for
the facility by the NCDENR Underground Injection Control Section.
GRAPHS

0
5
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15
20
25
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05
/
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9
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1
8
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0
9
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/
2
1
/
1
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11
/
1
8
/
1
0
05
/
2
3
/
1
1
08
/
2
3
/
1
1
11
/
1
5
/
1
1
02
/
2
1
/
1
2
06
/
0
5
/
1
2
10
/
0
9
/
1
2
11
/
1
2
/
1
2
02
/
1
8
/
1
3
05
/
1
3
/
1
3
11
/
1
1
/
1
3
02
/
1
0
/
1
4
05
/
1
2
/
1
4
08
/
1
8
/
1
4
11
/
1
1
/
1
4
02
/
2
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/
1
5
05
/
1
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/
1
5
08
/
2
4
/
1
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/
1
0
/
1
5
co
n
c
e
n
t
r
a
t
i
o
n

(
p
p
b
)
date sampled
1,1-dichloroethane
MW-21s MW-21d
includes estimated (J) valuesoutliers removed from dataset
injection event 1: 03-29-11
0
5
10
15
20
25
30
35
05
/
2
3
/
0
0
11
/
2
9
/
0
0
06
/
0
5
/
0
1
11
/
1
3
/
0
1
06
/
0
4
/
0
2
03
/
1
2
/
0
3
06
/
1
8
/
0
3
12
/
0
8
/
0
3
06
/
2
2
/
0
4
11
/
3
0
/
0
4
06
/
0
1
/
0
5
11
/
0
2
/
0
5
05
/
2
2
/
0
6
11
/
2
7
/
0
6
06
/
1
2
/
0
7
12
/
1
2
/
0
7
06
/
1
7
/
0
8
11
/
0
5
/
0
8
05
/
1
9
/
0
9
11
/
1
8
/
0
9
06
/
2
1
/
1
0
11
/
1
8
/
1
0
05
/
2
3
/
1
1
08
/
2
3
/
1
1
11
/
1
5
/
1
1
02
/
2
1
/
1
2
06
/
0
5
/
1
2
10
/
0
9
/
1
2
11
/
1
2
/
1
2
02
/
1
8
/
1
3
05
/
1
3
/
1
3
11
/
1
1
/
1
3
02
/
1
0
/
1
4
05
/
1
2
/
1
4
08
/
1
8
/
1
4
11
/
1
1
/
1
4
02
/
2
3
/
1
5
05
/
1
2
/
1
5
08
/
2
4
/
1
5
11
/
1
0
/
1
5
co
n
c
e
n
t
r
a
t
i
o
n

(
p
p
b
)
date sampled
1,1-dichloroethane
MW-23 MW-24
includes estimated (J) valuesoutliers removed from dataset
injection event 1: 03-29-11 injection event 4: 09-13-12
0
5
10
15
20
25
30
35
40
05
/
2
3
/
0
0
11
/
2
9
/
0
0
06
/
0
5
/
0
1
11
/
1
3
/
0
1
06
/
0
4
/
0
2
03
/
1
2
/
0
3
06
/
1
8
/
0
3
12
/
0
8
/
0
3
06
/
2
2
/
0
4
11
/
3
0
/
0
4
06
/
0
1
/
0
5
11
/
0
2
/
0
5
05
/
2
2
/
0
6
11
/
2
7
/
0
6
06
/
1
2
/
0
7
12
/
1
2
/
0
7
06
/
1
7
/
0
8
11
/
0
5
/
0
8
05
/
1
9
/
0
9
11
/
1
8
/
0
9
06
/
2
1
/
1
0
11
/
1
8
/
1
0
05
/
2
3
/
1
1
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/
2
3
/
1
1
11
/
1
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/
1
1
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/
2
1
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1
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/
0
5
/
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/
0
9
/
1
2
11
/
1
2
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1
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/
1
8
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1
3
05
/
1
3
/
1
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11
/
1
1
/
1
3
02
/
1
0
/
1
4
05
/
1
2
/
1
4
08
/
1
8
/
1
4
11
/
1
1
/
1
4
02
/
2
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1
5
05
/
1
2
/
1
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08
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2
4
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1
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11
/
1
0
/
1
5
co
n
c
e
n
t
r
a
t
i
o
n

(
p
p
b
)
date sampled
cis-1,2-dichloroethene
MW-21s MW-21d
includes estimated (J) valuesoutliers removed from dataset
injection event 1: 03-29-11
injection event 4: 09-13-12
0
10
20
30
40
50
60
70
80
90
co
n
c
e
n
t
r
a
t
i
o
n

(
p
p
b
)
date sampled
cis-1,2-dichloroethene
MW-23 MW-24
includes estimated (J) valuesoutliers removed from dataset
injection event 1: 03-29-11 injection event 4: 09-13-12
0
50
100
150
200
250
co
n
c
e
n
t
r
a
t
i
o
n

(
p
p
b
)
date sampled
cis-1,2-dichloroethene
MW-15
includes estimated (J) valuesoutliers removed from dataset
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
co
n
c
e
n
t
r
a
t
i
o
n

(
p
p
b
)
date sampled
tetrachloroethene
MW-21s MW-21d
includes estimated (J) valuesoutliers removed from dataset
injection event 1: 03-29-11 injection event 4: 09-13-12
0
0.5
1
1.5
2
2.5
3
3.5
4
co
n
c
e
n
t
r
a
t
i
o
n

(
p
p
b
)
date sampled
tetrachloroethene
MW-23 MW-24
includes estimated (J) valuesoutliers removed from dataset
injection event 1: 03-29-11 injection event 4: 09-13-12
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
co
n
c
e
n
t
r
a
t
i
o
n

(
p
p
b
)
date sampled
vinyl chloride
MW-21s MW-21d
includes estimated (J) valuesoutliers removed from dataset
injection event 1: 03-29-11 injection event 4: 09-13-12
0
1
2
3
4
5
6
co
n
c
e
n
t
r
a
t
i
o
n

(
p
p
b
)
date sampled
vinyl chloride
MW-23 MW-24
includes estimated (J) valuesoutliers removed from dataset
injection event 1: 03-29-11 injection event 4: 09-13-12
TABLES

acetone 04/17/90
MCL = w 07/11/91
FBAC = 100 (SWSL)05/28/92
NCGQS = 6000 (2L Std)06/30/93
2L Std = 700 (pre- Jan. 2010)11/04/94
2L Std = 6000 (Jan. 2010)12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/9804/26/99
11/22/99
05/23/00
11/29/00
06/05/0111/13/01
06/04/02
03/12/03
06/18/03
12/08/0306/22/04
11/30/04
06/01/05
11/02/05
05/22/06
11/27/06
06/12/07
12/12/07
06/17/08 <1.2 412 J <1.2 <1.2 <1.2 <1.2 1.2 100 ic, cc
11/05/08 <1.2 106 S <1.2 <1.2 <1.2 <1.2 1.2 100
05/19/09 <1.5 61 J <1.5 <1.5 <1.5 <1.5 1.5 100
11/18/09 <3 300 <3 <3 <3 <3 3 100
06/21/10 <1.5 <1.5 14 J <1.5 <1.5 <1.5 1.5 100
11/18/10 <1.5 16 J <1.5 <1.5 <1.5 <1.5 1.5 100
injection event (03-29-11)05/23/11 <1.2 120 <1.2 <1.2 <1.2 <1.2 1.2 100
08/23/11 1.2 100
injection event (09-28-11)11/15/11 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
02/21/12 1.2 100
injection event (04-14-12)06/05/12 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
10/09/12 1.2 100
injection event (09-13-12)11/12/12 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
02/18/13 1.2 100
05/13/13 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
08/21/13 1.2 100
11/11/13 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
02/10/14 1.2 100
05/12/14 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
08/18/14 1.2 100
11/11/14 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
02/23/15 1.2 100
05/12/15 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
08/24/15 1.2 100
11/10/15 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
MW-6R MW-7 MW-7R MW-13 MW-14A MW-14BConstituentSample Date MW-1 MW-4 MW-5 MW-6
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
LOD SWSL QA/QC
acetone 04/17/90
MCL = w 07/11/91
FBAC = 100 (SWSL)05/28/92
NCGQS = 6000 (2L Std)06/30/93
2L Std = 700 (pre- Jan. 2010)11/04/94
2L Std = 6000 (Jan. 2010)12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/9804/26/99
11/22/99
05/23/00
11/29/00
06/05/0111/13/01
06/04/02
03/12/03
06/18/03
12/08/0306/22/04
11/30/04
06/01/05
11/02/05
05/22/06
11/27/06
06/12/07
12/12/07
06/17/08 <1.2 2 J <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 8.1 J 1.2 100 ic, cc
11/05/08 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
05/19/09 <1.5 <1.5 <1.5 12 J <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
11/18/09 <3 <3 <3 9.5 J <3 1.5 J <3 <3 <3 3 100
06/21/10 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
11/18/10 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
injection event (03-29-11)05/23/11 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
08/23/11 <1.2 <1.2 <1.2 <1.2 1.2 100
injection event (09-28-11)11/15/11 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
02/21/12 <1.2 <1.2 <1.2 <1.2 1.2 100
injection event (04-14-12)06/05/12 <1.2 <1.2 <1.2 4.7 J <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
10/09/12 <1.2 <1.2 <1.2 <1.2 1.2 100
injection event (09-13-12)11/12/12 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
02/18/13 <1.2 <1.2 <1.2 <1.2 1.2 100
05/13/13 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
08/21/13 <0.12 <1.2 <1.2 <1.2 1.2 100
11/11/13 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
02/10/14 <1.2 <1.2 <1.2 <1.2 1.2 100
05/12/14 <1.2 <1.2 <1.2 5.7 J <1.2 <1.2 <1.2 <1.2 1.2 100
08/18/14 <1.2 <1.2 <1.2 <1.2 1.2 100
11/11/14 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
02/23/15 <1.2 <1.2 <1.2 <1.2 1.2 100
05/12/15 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
08/24/15 <1.2 <1.2 <1.2 <1.2 1.2 100
11/10/15 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
Constituent Sample Date MW-15
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
MW-23 MW-24 LOD SWSL QA/QCMW-16 MW-17 MW-20 MW-21d MW-21s MW-22
benzene 04/17/90 <5.0 <5.0 <5.0 <5.0 <5.0
MCL = 5 07/11/91 <5.0 <5.0 <5.0 <5.0 <5.0
FBAC = 1 (SWSL)05/28/92 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
NCGQS = 1 (2L Std)06/30/93 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/04/94 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 md
12/20/94 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
02/02/95 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
03/13/95 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/15/95 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 is
07/25/96 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
02/25/97 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
09/03/97 <5.0 <5.0 <5.0 <5.0 <5.0
05/04/98 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/02/98 <5.0 <5.0 <5.0 <5.0 <5.0
04/26/99 <5.0 <5.0 <5.0 <5.0 <5.0
11/22/99 <5.0 <5.0 <5.0 <5.0 <5.0
05/23/00 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/29/00 <5.0 <5.0 <5.0 <5.0 <5.0
06/05/01 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/13/01 <5.0 <5.0 <5.0 cc
06/04/02 <5.0 <5.0 <5.0
03/12/03 <5.0 <5.0 <5.0 <5.0 ht
06/18/03 <5.0 <5.0 <5.0 <5.0 <5.0 ic, cc, ss
12/08/03 <5.0 <5.0 <5.0 ic, cc
06/22/04 <5.0 <5.0 <5.0 ic, cc
11/30/04 <5.0 <5.0 <5.0
06/01/05 <5.0 <5.0 <5.0
11/02/05 <5.0 <5.0 <5.0
05/22/06 <5.0 <5.0 <5.0
11/27/06 <5.0 <5.0 <5.0
06/12/07 <0.1 <0.1 <0.1 1.1 0.1 1
12/12/07 <0.1 <0.1 <0.1 0.9 J 0.1 1
06/17/08 <0.1 0.7 J <0.1 1 J <0.1 1 J 0.1 1 ic, cc
11/05/08 <0.1 0.8 J <0.1 <0.1 1 J 0.6 J 0.1 1
05/19/09 <0.2 1.1 <0.2 <0.2 0.63 J 1.3 0.2 1
11/18/09 <0.4 1.2 <0.4 <0.4 <0.4 1.3 0.4 1
06/21/10 <0.05 <0.05 0.87 J <0.05 <0.05 <0.05 0.05 1
11/18/10 <0.05 1.6 <0.05 <0.05 <0.05 1.2 0.2 1
injection event (03-29-11)05/23/11 <0.68 <0.68 <0.68 <0.68 <0.68 0.98 J 0.68 1
08/23/11 0.68 1
injection event (09-28-11)11/15/11 <0.68 <0.68 <0.68 <0.68 1.2 0.68 1
02/21/12 0.15 1
injection event (04-14-12)06/05/12 <0.15 <0.15 <0.15 <0.15 0.73 J 0.15 1
10/09/12 0.15 1
injection event (09-13-12)11/12/12 <0.15 <0.15 <0.15 <0.15 1.2 0.15 1
02/18/13 0.15 1
05/13/13 <0.15 <0.15 <0.15 <0.15 1.2 0.15 1
08/21/13 0.15 1
11/11/13 <0.15 0.43 J <0.15 <0.15 0.85 J 0.15 1
02/10/14 0.15 1
05/12/14 <0.15 <0.15 <0.15 <0.15 0.78 J 0.15 1
08/18/14 0.15 1
11/11/14 <0.15 <0.15 <0.15 <0.15 1.0 0.15 1
02/23/15 0.15 1
05/12/15 <0.15 <0.15 <0.15 <0.15 1.2 0.15 1
08/24/15 0.15 1
11/10/15 <0.15 <0.15 <0.15 <0.15 1.2 0.15 1
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW-6R MW-7 MW-7R MW-13 MW-14A MW-14B
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
Constituent Sample Date MW-1 MW-4 MW-5 MW-6 LOD SWSL QA/QC
benzene 04/17/90 <5.0 <5.0
MCL = 5 07/11/91 <5.0 <5.0
FBAC = 1 (SWSL)05/28/92 <5.0 <5.0 <5.0
NCGQS = 1 (2L Std)06/30/93 <5.0 <5.0 <5.0
11/04/94 <5.0 <5.0 <5.0 12 md
12/20/94 <5.0 <5.0 <5.0 <5.0
02/02/95 <5.0 <5.0 <5.0 13
03/13/95 <5.0 <5.0 <5.0 8
11/15/95 <5.0 <5.0 <5.0 8 J is
07/25/96 <5.0 <5.0 <5.0 8
02/25/97 <5.0 <5.0 <5.0 9
09/03/97 <5.0 <5.0 <5.0 8
05/04/98 <5.0 <5.0 <5.0 6
11/02/98 <5.0 <5.0 <5.0 6
04/26/99 <5.0 <5.0 <5.0 7
11/22/99 <5.0 <5.0 <5.0 6
05/23/00 <5.0 <5.0 <5.0 7 <5.0 <5.0 <5.0
11/29/00 <5.0 <5.0 <5.0 7 <5.0 <5.0 <5.0
06/05/01 <5.0 <5.0 <5.0 7 <5.0 <5.0 <5.0
11/13/01 <5.0 <5.0 <5.0 7 J <5.0 <5.0 <5.0 cc
06/04/02 <5.0 <5.0 <5.0 6 <5.0 <5.0 <5.0
03/12/03 <5.0 <5.0 <5.0 6 J <5.0 <5.0 <5.0 ht
06/18/03 <5.0 <5.0 <5.0 6 J <5.0 <5.0 <5.0 ic, cc, ss
12/08/03 <5.0 <5.0 <5.0 5 J <5.0 <5.0 <5.0 ic, cc
06/22/04 <5.0 <5.0 <5.0 6 J <5.0 <5.0 <5.0 ic, cc
11/30/04 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
06/01/05 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/02/05 <5.0 <5.0 <5.0 7 <5.0 <5.0 <5.0
05/22/06 <5.0 <5.0 <5.0 6 <5.0 <5.0 <5.0
11/27/06 <5.0 <5.0 <5.0 5.5 <5.0 <5.0 <5.0
06/12/07 1.4 0.5 J <0.1 5.6 <0.1 <0.1 <0.1 <0.1 0.1 1
12/12/07 1.3 0.4 J <0.1 4.4 <0.1 <0.1 0.5 J 0.4 J 0.1 1
06/17/08 1.2 J 0.6 J <0.1 5 J <0.1 <0.1 0.3 J <0.1 <0.1 0.1 1 ic, cc
11/05/08 1.4 0.4 J <0.1 5.2 0.2 J <0.1 <0.1 0.3 J 0.2 J 0.1 1
05/19/09 1.6 0.67 J <0.2 5.1 <0.2 <0.2 0.49 J <0.2 <0.2 0.2 1
11/18/09 1.4 0.67 J <0.4 5.2 <0.4 <0.4 0.71 J 0.47 J <0.4 0.4 1
06/21/10 0.8 J <0.05 <0.05 5.2 <0.05 <0.05 <0.05 <0.05 <0.05 0.05 1
11/18/10 2 0.69 J <0.05 5.8 0.4 J <0.05 0.69 J 0.52 J <0.05 0.2 1
injection event (03-29-11)05/23/11 1.7 <0.68 <0.68 4.4 <0.68 <0.68 <0.68 <0.68 <0.68 0.68 1
08/23/11 <0.68 <0.68 <0.68 <0.68 0.68 1
injection event (09-28-11)11/15/11 1.5 <0.68 <0.68 5.2 <0.68 <0.68 0.74 J <0.68 <0.68 0.68 1
02/21/12 <0.15 <0.15 <0.15 <0.15 0.15 1
injection event (04-14-12)06/05/12 1.1 <0.15 <0.15 4.3 <0.15 <0.15 0.5 J <0.15 <0.15 0.15 1
10/09/12 <0.15 <0.15 <0.15 <0.15 0.15 1
injection event (09-13-12)11/12/12 1.5 0.49 J <0.15 5.5 <0.15 <0.15 0.79 J 0.49 J <0.15 0.15 1
02/18/13 <0.15 <0.15 <0.15 <0.15 0.15 1
05/13/13 1.4 0.41 J <0.15 6.2 <0.15 <0.15 0.73 J <0.15 <0.15 0.15 1
08/21/13 0.41 J <0.15 <0.15 <0.15 0.15 1
11/11/13 1.3 <0.15 <0.15 4.3 <0.15 <0.15 0.74 J <0.15 <0.15 0.15 1
02/10/14 <0.15 <0.15 <0.15 <0.15 0.15 1
05/12/14 <0.15 <0.15 <0.15 5.4 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 1
08/18/14 <0.15 <0.15 0.43 J <0.15 0.15 1
11/11/14 1.2 <0.15 <0.15 5.3 <0.15 <0.15 0.64 J <0.15 <0.15 0.15 1
02/23/15 <0.15 <0.15 <0.15 <0.15 0.15 1
05/12/15 1.3 <0.15 <0.15 5.3 <0.15 <0.15 0.70 J <0.15 <0.15 0.15 1
08/24/15 <0.15 <0.15 0.40 J <0.15 0.15 1
11/10/15 1.2 0.44 J 5.0 <0.15 <0.15 <0.15 0.40 J <0.15 0.15 1
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
Constituent Sample Date MW-15
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
MW-23 MW-24 LOD SWSL QA/QCMW-16 MW-17 MW-20 MW-21d MW-21s MW-22
bis(2-ethylhexyl)phthalate 04/17/90
MCL = w 07/11/91
FBAC = 15 (SWSL)05/28/92
NCGQS = 3 (2L Std)06/30/93
2L Std = 3 (Aug. 2010)11/04/94
12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/98
04/26/99
11/22/99
05/23/00
11/29/00
06/05/01
11/13/01
06/04/02
03/12/03
06/18/03
12/08/03
06/22/04
11/30/04
06/01/05
11/02/05
05/22/06
11/27/06
06/12/07
12/12/07
06/17/08
11/05/08
05/19/09
11/18/09
06/21/10
11/18/10
injection event (03-29-11)05/23/11 <1.7 <1.7 2.3 J 1.7 15
08/23/11
injection event (09-28-11)11/15/11
02/21/12
injection event (04-14-12)06/05/12 <1.7 <1.7 <1.7 1.7 15
10/09/12
injection event (09-13-12)11/12/12
02/18/13
05/13/13 <1.7 <1.7 <1.7 1.7 15
08/21/13
11/11/13
02/10/14
05/12/14 <1.7 <1.7 <1.7 1.7 15
08/18/14
11/11/14
02/23/15
05/12/15 <1.7 <1.7 <1.7 1.7 15
08/24/15
11/10/15
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
Constituent Sample Date MW-1 MW-4 MW-5 MW-6
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
LOD SWSL QA/QCMW-6R MW-7 MW-7R MW-13 MW-14A MW-14B
bis(2-ethylhexyl)phthalate 04/17/90
MCL = w 07/11/91
FBAC = 15 (SWSL)05/28/92
NCGQS = 3 (2L Std)06/30/93
2L Std = 3 (Aug. 2010)11/04/94
12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/98
04/26/99
11/22/99
05/23/00
11/29/00
06/05/01
11/13/01
06/04/02
03/12/03
06/18/03
12/08/03
06/22/04
11/30/04
06/01/05
11/02/05
05/22/06
11/27/06
06/12/07
12/12/07
06/17/08
11/05/08
05/19/09
11/18/09
06/21/10
11/18/10
injection event (03-29-11)05/23/11 4.5 J <1.7 <1.7 <1.7 1.7 15
08/23/11
injection event (09-28-11)11/15/11
02/21/12
injection event (04-14-12)06/05/12 <1.7 <1.7 <1.7 <1.7 1.7 15
10/09/12
injection event (09-13-12)11/12/12
02/18/13
05/13/13 <1.7 <1.7 <1.7 <1.7 <1.7 <1.7 1.7 15
08/21/13
11/11/13
02/10/14
05/12/14 <1.7 <1.7 <1.7 <1.7 <1.7 <1.7 1.7 15
08/18/14
11/11/14
02/23/15
05/12/15 <1.7 <1.7 <1.7 <1.7 <1.7 <1.7 1.7 15
08/24/15
11/10/15
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW-23 MW-24 LOD SWSL QA/QCMW-16 MW-17 MW-20 MW-21d MW-21s MW-22ConstituentSample Date MW-15
bromomethane 04/17/90
MCL = w 07/11/91
FBAC = 10 (SWSL)05/28/92
NCGQS = 10 (GWPS)06/30/93
GWPS = NE (pre- Aug. 2010)11/04/94
GWPS = 10 (Aug. 2010)12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/98
04/26/99
11/22/99
05/23/00
11/29/00
06/05/01
11/13/01
06/04/02
03/12/03
06/18/03
12/08/03
06/22/04
11/30/04
06/01/05
11/02/05
05/22/06
11/27/06
06/12/07
12/12/07
06/17/08
11/05/08
05/19/09
11/18/09 <0.49 <0.49 <0.49 <0.49 <0.49 <0.49 0.49 10
06/21/10 <0.28 <0.28 <0.28 <0.28 <0.28 <0.28 0.28 10
11/18/10 <0.49 <0.49 <0.49 <0.49 <0.49 <0.49 0.49 10
injection event (03-29-11)05/23/11 <0.58 <0.58 <0.58 <0.58 <0.58 <0.58 0.58 10
08/23/11 0.58 10
injection event (09-28-11)11/15/11 <0.58 <0.58 <0.58 <0.58 <0.58 0.58 10
02/21/12 0.14 10
injection event (04-14-12)06/05/12 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 10
10/09/12 0.14 10
injection event (09-13-12)11/12/12 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 10
02/18/13 0.14 10
05/13/13 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 10
08/21/13 0.14 10
11/11/13 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 10
02/10/14 0.14 10
05/12/14 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 10
08/18/14 0.14 10
11/11/14 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 10
02/23/15 0.14 10
05/12/15 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 10
08/24/15 0.14 10
11/10/15 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 10
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW-6R MW-7 MW-7R MW-13 MW-14A MW-14B
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
Constituent Sample Date MW-1 MW-4 MW-5 MW-6 LOD SWSL QA/QC
bromomethane 04/17/90
MCL = w 07/11/91
FBAC = 10 (SWSL)05/28/92
NCGQS = 10 (GWPS)06/30/93
GWPS = NE (pre- Aug. 2010)11/04/94
GWPS = 10 (Aug. 2010)12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/98
04/26/99
11/22/99
05/23/00
11/29/00
06/05/01
11/13/01
06/04/02
03/12/03
06/18/03
12/08/03
06/22/04
11/30/04
06/01/05
11/02/05
05/22/06
11/27/06
06/12/07
12/12/07
06/17/08
11/05/08
05/19/09
11/18/09 <0.49 <0.49 <0.49 1.5 J <0.49 <0.49 <0.49 1.6 J <0.49 0.49 10
06/21/10 <0.28 <0.28 <0.28 <0.28 <0.28 <0.28 <0.28 <0.28 <0.28 0.28 10
11/18/10 <0.49 <0.49 <0.49 <0.49 <0.49 <0.49 <0.49 <0.49 <0.49 0.49 10
injection event (03-29-11)05/23/11 <0.58 <0.58 <0.58 <0.58 <0.58 <0.58 <0.58 <0.58 <0.58 0.58 10
08/23/11 <0.58 <0.58 <0.58 <0.58 0.58 10
injection event (09-28-11)11/15/11 <0.58 <0.58 <0.58 <0.58 <0.58 <0.58 <0.58 <0.58 <0.58 0.58 10
02/21/12 <0.14 <0.14 <0.14 <0.14 0.14 10
injection event (04-14-12)06/05/12 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 10
10/09/12 <0.14 <0.14 <0.14 <0.14 0.14 10
injection event (09-13-12)11/12/12 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 10
02/18/13 <0.14 <0.14 <0.14 <0.14 0.14 10
05/13/13 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 10
08/21/13 <0.14 <0.14 <0.14 <0.14 0.14 10
11/11/13 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 10
02/10/14 <0.14 <0.14 <0.14 <0.14 0.14 10
05/12/14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 10
08/18/14 <0.14 <0.14 <0.14 <0.14 0.14 10
11/11/14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 10
02/23/15 <0.14 <0.14 <0.14 <0.14 0.14 10
05/12/15 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 10
08/24/15 <0.14 <0.14 <0.14 <0.14 0.14 10
11/10/15 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 10
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
Constituent Sample Date MW-15
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
MW-23 MW-24 LOD SWSL QA/QCMW-16 MW-17 MW-20 MW-21d MW-21s MW-22
2-butanone 04/17/90
MCL = w 07/11/91
FBAC = 100 (SWSL)05/28/92
NCGQS = 4000 (2L Std)06/30/93
2L Std = 4200 (pre- Jan. 2010)11/04/94
2L Std = 4000 (Jan. 2010)12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/98
04/26/99
11/22/99
05/23/00
11/29/00
06/05/01
11/13/01
06/04/02
03/12/03
06/18/03
12/08/03
06/22/04
11/30/04
06/01/05
11/02/05
05/22/06
11/27/06
06/12/07
12/12/07
06/17/08 <0.9 3.3 J <0.9 <0.9 <0.9 <0.9 0.9 100 ic, cc
11/05/08 <0.9 1 J <0.9 <0.9 <0.9 <0.9 0.9 100
05/19/09 <1 <1 <1 <1 <1 <1 1 100
11/18/09 <2 2.3 J <2 <2 <2 <2 2 100
06/21/10 <1 <1 <1 <1 <1 <1 1 100
11/18/10 <1 <1 <1 <1 <1 <1 1 100
injection event (03-29-11)05/23/11 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 1.3 100
08/23/11 1.3 100
injection event (09-28-11)11/15/11 <1.3 <1.3 <1.3 <1.3 <1.3 1.3 100
02/21/12 1.3 100
injection event (04-14-12)06/05/12 <1.3 <1.3 <1.3 <1.3 <1.3 1.3 100
10/09/12 1.3 100
injection event (09-13-12)11/12/12 <1.3 <1.3 <1.3 <1.3 <1.3 1.3 100
02/18/13 1.3 100
05/13/13 <1.3 <1.3 <1.3 <1.3 <1.3 1.3 100
08/21/13 1.3 100
11/11/13 <1.3 <1.3 <1.3 <1.3 <1.3 1.3 100
02/10/14 1.3 100
05/12/14 <1.3 <1.3 <1.3 <1.3 <1.3 1.3 100
08/18/14 1.3 100
11/11/14 <1.3 <1.3 <1.3 <1.3 <1.3 1.3 100
02/23/15 1.3 100
05/12/15 <1.3 <1.3 <1.3 <1.3 <1.3 1.3 100
08/24/15 1.3 100
11/10/15 <1.3 <1.3 <1.3 <1.3 <1.3 1.3 100
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
Constituent Sample Date MW-1 MW-4 MW-5 MW-6
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
LOD SWSL QA/QCMW-6R MW-7 MW-7R MW-13 MW-14A MW-14B
2-butanone 04/17/90
MCL = w 07/11/91
FBAC = 100 (SWSL)05/28/92
NCGQS = 4000 (2L Std)06/30/93
2L Std = 4200 (pre- Jan. 2010)11/04/94
2L Std = 4000 (Jan. 2010)12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/98
04/26/99
11/22/99
05/23/00
11/29/00
06/05/01
11/13/01
06/04/02
03/12/03
06/18/03
12/08/03
06/22/04
11/30/04
06/01/05
11/02/05
05/22/06
11/27/06
06/12/07
12/12/07
06/17/08 <0.9 <0.9 <0.9 <0.9 <0.9 <0.9 <0.9 <0.9 <0.9 0.9 100 ic, cc
11/05/08 <0.9 <0.9 <0.9 <0.9 <0.9 <0.9 <0.9 <0.9 <0.9 0.9 100
05/19/09 <1 <1 <1 <1 <1 <1 <1 <1 <1 1 100
11/18/09 <2 <2 <2 <2 <2 <2 <2 <2 <2 2 100
06/21/10 <1 <1 <1 <1 <1 <1 <1 <1 <1 1 100
11/18/10 <1 <1 <1 <1 <1 <1 <1 <1 <1 1 100
injection event (03-29-11)05/23/11 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 1.3 100
08/23/11 <1.3 <1.3 <1.3 <1.3 1.3 100
injection event (09-28-11)11/15/11 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 1.3 100
02/21/12 <1.3 <1.3 <1.3 <1.3 1.3 100
injection event (04-14-12)06/05/12 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 1.3 100
10/09/12 <1.3 <1.3 <1.3 <1.3 1.3 100
injection event (09-13-12)11/12/12 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 1.3 100
02/18/13 <1.3 <1.3 <1.3 <1.3 1.3 100
05/13/13 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 1.3 100
08/21/13 <1.3 <1.3 <1.3 <1.3 1.3 100
11/11/13 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 1.3 100
02/10/14 <1.3 <1.3 <1.3 <1.3 1.3 100
05/12/14 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 1.3 100
08/18/14 <1.3 <1.3 <1.3 <1.3 1.3 100
11/11/14 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 1.3 100
02/23/15 <1.3 <1.3 <1.3 <1.3 1.3 100
05/12/15 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 1.3 100
08/24/15 <1.3 <1.3 <1.3 <1.3 1.3 100
11/10/15 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 1.3 100
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW-23 MW-24 LOD SWSL QA/QCMW-16 MW-17 MW-20 MW-21d MW-21s MW-22ConstituentSample Date MW-15
carbon disulfide 04/17/90
MCL = w 07/11/91
FBAC = 100 (SWSL)05/28/92
NCGQS = 700 (2L Std)06/30/93
11/04/94
12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/98
04/26/99
11/22/99
05/23/00
11/29/00
06/05/01
11/13/01
06/04/02
03/12/03
06/18/03
12/08/03
06/22/04
11/30/04
06/01/05
11/02/05
05/22/06
11/27/06
06/12/07
12/12/07 <0.5 <0.5 <0.5 1.9 J 0.5 100
06/17/08 <0.5 6 J <0.5 <0.5 <0.5 <0.5 0.5 100 ic, cc
11/05/08 <0.5 4.5 J <0.5 <0.5 <0.5 <0.5 0.5 100
05/19/09 <0.54 <0.54 <0.54 <0.54 <0.54 <0.54 0.54 100
11/18/09 <0.54 <0.54 <0.54 <0.54 <0.54 <0.54 0.54 100
06/21/10 <0.54 <0.54 <0.54 <0.54 <0.54 <0.54 0.54 100
11/18/10 <0.54 <0.54 <0.54 <0.54 <0.54 <0.54 0.54 100
injection event (03-29-11)05/23/11 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
08/23/11 1.5 100
injection event (09-28-11)11/15/11 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
02/21/12 1.5 100
injection event (04-14-12)06/05/12 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
10/09/12 1.5 100
injection event (09-13-12)11/12/12 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
02/18/13 1.5 100
05/13/13 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
08/21/13 1.5 100
11/11/13 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
02/10/14 1.5 100
05/12/14 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
08/18/14 1.5 100
11/11/14 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
02/23/15 1.5 100
05/12/15 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
08/24/15 1.5 100
11/10/15 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW-6R MW-7 MW-7R MW-13 MW-14A MW-14B
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
Constituent Sample Date MW-1 MW-4 MW-5 MW-6 LOD SWSL QA/QC
carbon disulfide 04/17/90
MCL = w 07/11/91
FBAC = 100 (SWSL)05/28/92
NCGQS = 700 (2L Std)06/30/93
11/04/94
12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/98
04/26/99
11/22/99
05/23/00
11/29/00
06/05/01
11/13/01
06/04/02
03/12/03
06/18/03
12/08/03
06/22/04
11/30/04
06/01/05
11/02/05
05/22/06
11/27/06
06/12/07
12/12/07 <0.5 <0.5 <0.5 1.2 J <0.5 <0.5 <0.5 <0.5 0.5 100
06/17/08 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 0.5 100 ic, cc
11/05/08 8 J <0.5 <0.5 1.2 J <0.5 <0.5 1 J <0.5 <0.5 0.5 100
05/19/09 <0.54 <0.54 <0.54 <0.54 <0.54 <0.54 <0.54 <0.54 <0.54 0.54 100
11/18/09 <0.54 <0.54 <0.54 <0.54 <0.54 <0.54 <0.54 <0.54 <0.54 0.54 100
06/21/10 <0.54 <0.54 <0.54 <0.54 <0.54 <0.54 <0.54 <0.54 <0.54 0.54 100
11/18/10 <0.54 <0.54 <0.54 <0.54 <0.54 <0.54 <0.54 <0.54 <0.54 0.54 100
injection event (03-29-11)05/23/11 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
08/23/11 <1.5 <1.5 <1.5 <1.5 1.5 100
injection event (09-28-11)11/15/11 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
02/21/12 <1.5 <1.5 <1.5 <1.5 1.5 100
injection event (04-14-12)06/05/12 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
10/09/12 <1.5 <1.5 <1.5 <1.5 1.5 100
injection event (09-13-12)11/12/12 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
02/18/13 <1.5 <1.5 <1.5 <1.5 1.5 100
05/13/13 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
08/21/13 <1.5 <1.5 <1.5 <1.5 1.5 100
11/11/13 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
02/10/14 <1.5 <1.5 <1.5 <1.5 1.5 100
05/12/14 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
08/18/14 <1.5 <1.5 <1.5 <1.5 1.5 100
11/11/14 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
02/23/15 <1.5 <1.5 <1.5 <1.5 1.5 100
05/12/15 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
08/24/15 <1.5 <1.5 <1.5 <1.5 1.5 100
11/10/15 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
Constituent Sample Date MW-15
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
MW-23 MW-24 LOD SWSL QA/QCMW-16 MW-17 MW-20 MW-21d MW-21s MW-22
chlorobenzene 04/17/90
MCL = 100 07/11/91
FBAC = 3 (SWSL)05/28/92
NCGQS = 50 (2L Std)06/30/93
11/04/94 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
12/20/94 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
02/02/95 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
03/13/95 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/15/95 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
07/25/96 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
02/25/97 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
09/03/97 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
05/04/98 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/02/98 7 R <5.0 <5.0 <5.0 <5.0
04/26/99 <5.0 <5.0 <5.0 <5.0 <5.0
11/22/99 <5.0 <5.0 <5.0 <5.0 <5.0
05/23/00 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/29/00 <5.0 <5.0 <5.0 <5.0 <5.0
06/05/01 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/13/01 <5.0 <5.0 <5.0
06/04/02 <5.0 <5.0 <5.0
03/12/03 <5.0 <5.0 <5.0 <5.0
06/18/03 <5.0 <5.0 <5.0 <5.0 <5.0
12/08/03 <5.0 <5.0 <5.0 <5.0 <5.0
06/22/04 <5.0 <5.0 <5.0 <5.0 <5.0
11/30/04 <5.0 <5.0 <5.0
06/01/05 <5.0 <5.0 <5.0
11/02/05 <5.0 <5.0 <5.0
05/22/06 <5.0 <5.0 <5.0
11/27/06 <5.0 <5.0 <5.0
06/12/07 <0.1 <0.1 <0.1 1.2 J 0.1 3
12/12/07 <0.1 <0.1 0.4 J 0.9 J 0.1 3
06/17/08 <0.1 <0.1 <0.1 3 J 0.4 J 1.2 J 0.1 3 ic, cc
11/05/08 <0.1 <0.1 <0.1 <0.1 0.5 J 0.7 J 0.1 3
05/19/09 <0.27 <0.27 <0.27 <0.27 1.7 J 1.9 J 0.27 3
11/18/09 <0.27 <0.27 <0.27 <0.27 0.69 J 1.4 J 0.27 3
06/21/10 <0.069 <0.069 <0.069 <0.069 0.59 J 1.8 J 0.069 3
11/18/10 <0.27 <0.27 <0.27 <0.27 0.59 J 1.7 J 0.27 3
injection event (03-29-11)05/23/11 <0.74 <0.74 <0.74 <0.74 <0.74 1.9 J 0.74 3
08/23/11 0.74 3
injection event (09-28-11)11/15/11 <0.74 <0.74 <0.74 <0.74 1.6 J 0.74 3
02/21/12 0.17 3
injection event (04-14-12)06/05/12 <0.17 <0.17 <0.17 0.48 J <0.17 0.17 3
10/09/12 0.17 3
injection event (09-13-12)11/12/12 <0.17 <0.17 <0.17 0.51 J 1.9 J 0.17 3
02/18/13 0.17 3
05/13/13 <0.17 <0.17 <0.17 0.62 J 2.3 J 0.17 3
08/21/13 0.17 3
11/11/13 <0.17 <0.17 <0.17 0.85 J 1.6 J 0.17 3
02/10/14 0.17 3
05/12/14 <0.17 <0.17 <0.17 0.55 J 3.5 0.17 3
08/18/14 0.17 3
11/11/14 <0.17 <0.17 <0.17 0.68 J 1.8 J 0.17 3
02/23/15 0.17 3
05/12/15 <0.17 <0.17 <0.17 0.43 J 3.0 0.17 3
08/24/15 0.17 3
11/10/15 <0.17 <0.17 <0.17 0.84 J 2.2 J 0.17 3
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
Constituent Sample Date MW-1 MW-4 MW-5 MW-6
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
LOD SWSL QA/QCMW-6R MW-7 MW-7R MW-13 MW-14A MW-14B
chlorobenzene 04/17/90
MCL = 100 07/11/91
FBAC = 3 (SWSL)05/28/92
NCGQS = 50 (2L Std)06/30/93
11/04/94 <5.0 <5.0 <5.0 <5.0
12/20/94 <5.0 <5.0 <5.0 <5.0
02/02/95 <5.0 <5.0 <5.0 <5.0
03/13/95 <5.0 <5.0 <5.0 <5.0
11/15/95 <5.0 <5.0 <5.0 <5.0
07/25/96 <5.0 <5.0 <5.0 <5.0
02/25/97 <5.0 <5.0 <5.0 <5.0
09/03/97 <5.0 <5.0 <5.0 <5.0
05/04/98 <5.0 <5.0 <5.0 <5.0
11/02/98 <5.0 <5.0 <5.0 <5.0
04/26/99 <5.0 <5.0 <5.0 <5.0
11/22/99 <5.0 <5.0 <5.0 <5.0
05/23/00 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/29/00 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
06/05/01 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/13/01 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
06/04/02 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
03/12/03 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
06/18/03 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
12/08/03 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
06/22/04 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/30/04 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
06/01/05 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/02/05 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
05/22/06 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/27/06 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
06/12/07 4.6 <0.1 <0.1 <0.1 0.5 J <0.1 0.6 J 0.7 J 0.1 3
12/12/07 3.9 0.2 J <0.1 0.3 J 0.3 J <0.1 1.2 J 0.9 J 0.1 3
06/17/08 5.2 J 0.3 J <0.1 0.4 J 0.5 J <0.1 1 J 0.8 J <0.1 0.1 3 ic, cc
11/05/08 4.4 <0.1 <0.1 0.4 J 0.4 J 0.3 J <0.1 0.8 J 0.3 J 0.1 3
05/19/09 6.5 <0.27 <0.27 0.88 J 0.97 J 0.68 J 1.4 J 0.99 J 0.57 J 0.27 3
11/18/09 5.6 <0.27 <0.27 0.77 J 0.81 J 0.62 J 2.1 J 1.3 J 0.59 J 0.27 3
06/21/10 6.5 <0.069 <0.069 0.8 J 0.87 J 0.66 J 1.2 J 0.58 J <0.069 0.069 3
11/18/10 6.3 0.41 J <0.27 0.73 J 0.95 J <0.27 1.6 J 1.8 J <0.27 0.27 3
injection event (03-29-11)05/23/11 6.5 <0.74 <0.74 <0.74 0.82 J <0.74 1.8 J 1.2 J <0.74 0.74 3
08/23/11 0.99 J <0.74 2 J <0.74 0.74 3
injection event (09-28-11)11/15/11 5.1 <0.74 <0.74 <0.74 <0.74 <0.74 2.5 J 1.9 J <0.74 0.74 3
02/21/12 0.75 J <0.17 1.6 J <0.17 0.17 3
injection event (04-14-12)06/05/12 6.6 <0.17 <0.17 0.55 J 0.92 J <0.17 2.3 J 1.5 J <0.17 0.17 3
10/09/12 0.94 J 0.72 J 2.2 J <0.17 0.17 3
injection event (09-13-12)11/12/12 7.2 <0.17 <0.17 0.77 J 1 J <0.17 <0.17 2.1 J 0.48 J 0.17 3
02/18/13 1.1 J <0.17 1.6 J 0.7 J 0.17 3
05/13/13 7.1 <0.17 <0.17 <0.17 1.3 J 0.47 J 2.4 J 1.4 J 0.73 J 0.17 3
08/21/13 1.3 1.1 2.0 0.46 J 0.17 3
11/11/13 7.2 <0.17 <0.17 0.88 J 1.5 J <0.17 2.3 J 2.5 J <0.17 0.17 3
02/10/14 1.5 J <0.17 1.4 J <0.17 0.17 3
05/12/14 8.0 0.42 J <0.17 1.5 J 1.3 J 0.63 J 2.5 J 2.4 J <0.17 0.17 3
08/18/14 <0.17 <0.17 1.4 J <0.17 0.17 3
11/11/14 6.1 <0.17 <0.17 1.1 J 1.4 J <0.17 2.4 J 3.1 <0.17 0.17 3
02/23/15 1.5 J <0.17 2.0 J <0.17 0.17 3
05/12/15 6.8 <0.17 <0.17 1.1 J 1.2 J 0.48 J 2.4 J 2.0 J <0.17 0.17 3
08/24/15 1.2 J 0.74 J 2.8 J <0.17 0.17 3
11/10/15 5.9 0.47 J <0.17 1.2 J 1.3 J <0.17 2.6 J 3.1 <0.17 0.17 3
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW-23 MW-24 LOD SWSL QA/QCMW-16 MW-17 MW-20 MW-21d MW-21s MW-22ConstituentSample Date MW-15
chloroethane 04/17/90 <10.0 <10.0 <10.0 <10.0 <10.0
MCL = 07/11/91 <10.0 <10.0 <10.0 <10.0 <10.0
FBAC = 10 (SWSL)05/28/92 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
NCGQS = 3000 (2L Std)06/30/93 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
2L Std = NE (pre- Jan. 2010)11/04/94 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
2L Std = 3000 (Jan. 2010)12/20/94 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
02/02/95 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
03/13/95 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
11/15/95 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
07/25/96 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
02/25/97 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
09/03/97 <10.0 <10.0 <10.0 <10.0 <10.0
05/04/98 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
11/02/98 <10.0 <10.0 <10.0 <10.0 <10.0
04/26/99 <10.0 <10.0 <10.0 <10.0 <10.0
11/22/99 <10.0 <10.0 <10.0 <10.0 <10.0
05/23/00 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
11/29/00 <10.0 <10.0 <10.0 <10.0 <10.0
06/05/01 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
11/13/01 <10.0 <10.0 <10.0
06/04/02 <10.0 <10.0 <10.0
03/12/03 <10.0 <10.0 <10.0 <10.0
06/18/03 <10.0 <10.0 <10.0 <10.0 <10.0
12/08/03 <10.0 <10.0 <10.0 <10.0 <10.0
06/22/04 <10.0 <10.0 <10.0 <10.0 <10.0
11/30/04 <10.0 <10.0 <10.0
06/01/05 <10.0 <10.0 <10.0
11/02/05 <10.0 <10.0 <10.0
05/22/06 <10.0 <10.0 <10.0
11/27/06 <10.0 <10.0 <10.0
06/12/07 <0.1 <0.1 3.6 J 6.9 J 0.1 10
12/12/07 <0.1 <0.1 0.4 J 1.3 J 0.1 10
06/17/08 <0.1 <0.1 <0.1 <0.1 <0.1 1.5 J 0.1 10 ic, cc
11/05/08 <0.1 <0.1 <0.1 <0.1 0.7 J 0.7 J 0.1 10
05/19/09 <0.3 <0.3 <0.3 <0.3 1.1 J 1.9 J 0.3 10
11/18/09 <0.3 <0.3 <0.3 <0.3 <0.3 1.2 J 0.3 10
06/21/10 <0.18 <0.18 <0.18 <0.18 <0.18 1.2 J 0.18 10
11/18/10 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 0.3 10
injection event (03-29-11)05/23/11 <0.75 <0.75 <0.75 <0.75 <0.75 <0.75 0.75 10
08/23/11 0.75 10
injection event (09-28-11)11/15/11 <0.75 <0.75 <0.75 <0.75 <0.75 0.75 10
02/21/12 0.23 10
injection event (04-14-12)06/05/12 <0.23 <0.23 <0.23 <0.23 <0.23 0.23 10
10/09/12 0.23 10
injection event (09-13-12)11/12/12 <0.23 <0.23 <0.23 <0.23 1.3 J 0.23 10
02/18/13 0.23 10
05/13/13 <0.23 <0.23 <0.23 <0.23 2.3 J 0.23 10
08/21/13 0.23 10
11/11/13 <0.23 0.66 J <0.23 <0.23 0.82 J 0.23 10
02/10/14 0.23 10
05/12/14 <0.23 <0.23 <0.23 <0.23 2.4 J 0.23 10
08/18/14 0.23 10
11/11/14 <0.23 <0.23 <0.23 <0.23 <0.23 0.23 10
02/23/15 0.23 10
05/12/15 <0.23 <0.23 <0.23 <0.23 1.4 J 0.23 10
08/24/15 0.23 10
11/10/15 <0.23 <0.23 <0.23 <0.23 0.88 J 0.23 10
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW-6R MW-7 MW-7R MW-13 MW-14A MW-14B
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
Constituent Sample Date MW-1 MW-4 MW-5 MW-6 LOD SWSL QA/QC
chloroethane 04/17/90 <10.0 <10.0
MCL = 07/11/91 <10.0 <10.0
FBAC = 10 (SWSL)05/28/92 <10.0 <10.0 <10.0
NCGQS = 3000 (2L Std)06/30/93 <10.0 <10.0 <10.0
2L Std = NE (pre- Jan. 2010)11/04/94 <10.0 <10.0 <10.0 <10.0
2L Std = 3000 (Jan. 2010)12/20/94 <10.0 <10.0 <10.0 <10.0
02/02/95 <10.0 <10.0 <10.0 <10.0
03/13/95 <10.0 <10.0 <10.0 <10.0
11/15/95 <10.0 <10.0 <10.0 <10.0
07/25/96 <10.0 <10.0 <10.0 <10.0
02/25/97 13.3 <10.0 <10.0 <10.0
09/03/97 <10.0 <10.0 <10.0 <10.0
05/04/98 17 <10.0 <10.0 <10.0
11/02/98 12 <10.0 <10.0 <10.0
04/26/99 13 <10.0 <10.0 <10.0
11/22/99 10 <10.0 <10.0 <10.0
05/23/00 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
11/29/00 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
06/05/01 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
11/13/01 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
06/04/02 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
03/12/03 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
06/18/03 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
12/08/03 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
06/22/04 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
11/30/04 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
06/01/05 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
11/02/05 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
05/22/06 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
11/27/06 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
06/12/07 17.1 3.3 J <0.1 1.7 J 7.7 J 5.8 J <0.1 8.9 J 0.1 10
12/12/07 2.9 J 0.7 J <0.1 0.5 J 1.3 J 0.5 J <0.1 2.4 J 0.1 10
06/17/08 4.8 J 1.4 J <0.1 0.6 J 2.2 J 1.7 J <0.1 2.6 J <0.1 0.1 10 ic, cc
11/05/08 3.3 J 0.5 J <0.1 0.4 J 1.5 J 1.2 J <0.1 1.9 J 1.8 J 0.1 10
05/19/09 4.6 J 0.91 J <0.3 0.4 J 2.1 J 1.8 J <0.3 1.9 J <0.3 0.3 10
11/18/09 3.3 J 0.79 J <0.3 <0.3 3.5 J 3 J <0.3 1.8 J <0.3 0.3 10
06/21/10 2.3 J 0.58 J <0.18 <0.18 1.1 J 0.83 J <0.18 0.95 J 0.83 J 0.18 10
11/18/10 2.5 J 0.77 J <0.3 <0.3 1.7 J 0.76 J <0.3 1.8 J 1.3 J 0.3 10
injection event (03-29-11)05/23/11 1.4 J <0.75 <0.75 <0.75 <0.75 <0.75 <0.75 <0.75 <0.75 0.75 10
08/23/11 1.7 J 1.6 J 2.2 J 1 J 0.75 10
injection event (09-28-11)11/15/11 1.7 J <0.75 <0.75 <0.75 0.9 J <0.75 <0.75 1.3 J <0.75 0.75 10
02/21/12 1.2 J 0.88 J 1.5 J 0.81 J 0.23 10
injection event (04-14-12)06/05/12 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 0.23 10
10/09/12 <0.23 1 J <0.23 1.2 J 0.23 10
injection event (09-13-12)11/12/12 2.5 J 0.75 J <0.23 <0.23 1.5 J 0.68 J <0.23 1.6 J 1.2 J 0.23 10
02/18/13 1.4 J <0.23 1.3 J <0.23 0.23 10
05/13/13 4.6 J <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 2.6 J <0.23 0.23 10
08/21/13 <0.23 0.88 J 1.5 1.2 0.23 10
11/11/13 2.8 J <0.23 <0.23 0.53 J 1.8 J <0.23 <0.23 1.3 J 1.3 J 0.23 10
02/10/14 <0.23 <0.23 <0.23 <0.23 0.23 10
05/12/14 3.6 J <0.23 <0.23 <0.23 2.5 J <0.23 <0.23 2.6 J <0.23 0.23 10
08/18/14 1.4 J <0.23 1.8 J <0.23 0.23 10
11/11/14 <0.23 <0.23 <0.23 <0.23 1.9 J <0.23 <0.23 <0.23 <0.23 0.23 10
02/23/15 <0.23 <0.23 <0.23 <0.23 0.23 10
05/12/15 2.5 J <0.23 <0.23 <0.23 1.3 J <0.23 <0.23 1.8 J <0.23 0.23 10
08/24/15 <0.23 <0.23 <0.23 <0.23 0.23 10
11/10/15 1.6 J <0.23 <0.23 <0.23 0.74 J <0.23 <0.23 0.99 J <0.23 0.23 10
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
Constituent Sample Date MW-15
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
MW-23 MW-24 LOD SWSL QA/QCMW-16 MW-17 MW-20 MW-21d MW-21s MW-22
2,4-D 04/17/90
MCL = 70 07/11/91
FBAC = 2 (SWSL)05/28/92
NCGQS = 70 (2L Std)06/30/93
11/04/94
12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/98
04/26/99
11/22/99
05/23/00
11/29/00
06/05/01 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 cc,ce
11/13/01
06/04/02 <1.0 <1.0
03/12/03 <1.0 <1.0
06/18/03 <1.0 <1.0
12/08/03 <1.0 <1.0
06/22/04 <1.0 <1.0
11/30/04 <1.0 <1.0
06/01/05 <1.0 <1.0
11/02/05 <1.0 <1.0
05/22/06 <1.0 <1.0
11/27/06
06/12/07 <0.03 <0.03 0.03 2
12/12/07
06/17/08 <0.03 <0.03 0.03 2
11/05/08
05/19/09 <0.091 <0.091 <0.091 0.091 2
11/18/09
06/21/10 <0.091 <0.091 <0.091 0.091 2
11/18/10
injection event (03-29-11)05/23/11 <0.15 <0.15 <0.15 0.15 2
08/23/11
injection event (09-28-11)11/15/11
02/21/12
injection event (04-14-12)06/05/12 <0.16 <0.16 <0.16 0.16 2
10/09/12
injection event (09-13-12)11/12/12
02/18/13
05/13/13 <0.16 <0.16 <0.16 0.16 2
08/21/13
11/11/13
02/10/14
05/12/14 <0.27 <0.27 <0.27 0.27 2
08/18/14
11/11/14
02/23/15
05/12/15 <0.27 <0.27 <0.27 0.27 2
08/24/15
11/10/15
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
Constituent Sample Date MW-1 MW-4 MW-5 MW-6
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
LOD SWSL QA/QCMW-6R MW-7 MW-7R MW-13 MW-14A MW-14B
2,4-D 04/17/90
MCL = 70 07/11/91
FBAC = 2 (SWSL)05/28/92
NCGQS = 70 (2L Std)06/30/93
11/04/94
12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/98
04/26/99
11/22/99
05/23/00
11/29/00
06/05/01 <1.0 <1.0 <1.0 1.3 R <1.0 <1.0 <1.0 cc,ce
11/13/01
06/04/02 <1.0 <1.0
03/12/03 <1.0 <1.0
06/18/03 <1.0 <1.0
12/08/03 <1.0 <1.0
06/22/04 <1.0 <1.0
11/30/04 <1.0 <1.0
06/01/05 <1.0 <1.0
11/02/05 <1.0 <1.0
05/22/06 <1.0 <1.0
11/27/06
06/12/07 <0.03 <0.03 0.03 2
12/12/07
06/17/08 <0.03 <0.03
11/05/08
05/19/09 <0.091 <0.091 <0.091 <0.091 0.091 2
11/18/09
06/21/10 <0.091 <0.091 <0.091 <0.091 0.091 2
11/18/10
injection event (03-29-11)05/23/11 <0.15 <0.15 <0.15 <0.15 0.15 2
08/23/11
injection event (09-28-11)11/15/11
02/21/12
injection event (04-14-12)06/05/12 <0.16 <0.16 <0.16 <0.16 0.16 2
10/09/12
injection event (09-13-12)11/12/12
02/18/13
05/13/13 <0.16 <0.16 <0.16 <0.16 <0.16 <0.16 0.16 2
08/21/13
11/11/13
02/10/14
05/12/14 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 0.27 2
08/18/14
11/11/14
02/23/15
05/12/15 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 0.27 2
08/24/15
11/10/15
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW-23 MW-24 LOD SWSL QA/QCMW-16 MW-17 MW-20 MW-21d MW-21s MW-22ConstituentSample Date MW-15
4,4'-DDD 04/17/90
MCL =07/11/91
FBAC = 0.1 (SWSL)05/28/92
NCGQS = 0.1 (2L Std)06/30/93
2L Std = 0.14 (pre- Jan. 2010)11/04/94
2L Std = 0.1 (Jan. 2010)12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/98
04/26/99
11/22/99
05/23/00
11/29/00
06/05/01
11/13/01
06/04/02
03/12/03
06/18/03
12/08/03
06/22/04
11/30/04
06/01/05
11/02/05
05/22/06
11/27/06
06/12/07 <0.01 <0.01 0.01 0.1
12/12/07
06/17/08 <0.01 <0.01 0.01 0.1
11/05/08
05/19/09 <0.024 <0.024 <0.024 0.024 0.1
11/18/09
06/21/10 <0.013 <0.013 <0.013 0.013 0.1
11/18/10
injection event (03-29-11)05/23/11 <0.013 <0.013 <0.013 0.013 0.1
08/23/11
injection event (09-28-11)11/15/11
02/21/12
injection event (04-14-12)06/05/12 <0.044 <0.044 <0.044 0.044 0.1
10/09/12
injection event (09-13-12)11/12/12
02/18/13
05/13/13 <0.044 <0.044 <0.044 0.044 0.1
08/21/13
11/11/13
02/10/14
05/12/14 <0.044 <0.044 <0.044 0.044 0.1
08/18/14
11/11/14
02/23/15
05/12/15 <0.044 <0.044 <0.044 0.044 0.1
08/24/15
11/10/15
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW-6R MW-7 MW-7R MW-13 MW-14A MW-14B
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
Constituent Sample Date MW-1 MW-4 MW-5 MW-6 LOD SWSL QA/QC
4,4'-DDD 04/17/90
MCL =07/11/91
FBAC = 0.1 (SWSL)05/28/92
NCGQS = 0.1 (2L Std)06/30/93
2L Std = 0.14 (pre- Jan. 2010)11/04/94
2L Std = 0.1 (Jan. 2010)12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/98
04/26/99
11/22/99
05/23/00
11/29/00
06/05/01
11/13/01
06/04/02
03/12/03
06/18/03
12/08/03
06/22/04
11/30/04
06/01/05
11/02/05
05/22/06
11/27/06
06/12/07 <0.01 0.02 J 0.01 0.1
12/12/07
06/17/08 <0.01 <0.01
11/05/08
05/19/09 <0.024 <0.024 <0.024 <0.024 0.024 0.1
11/18/09
06/21/10 <0.013 <0.013 <0.013 <0.013 0.013 0.1
11/18/10
injection event (03-29-11)05/23/11 <0.013 <0.013 <0.013 <0.013 0.013 0.1
08/23/11
injection event (09-28-11)11/15/11
02/21/12
injection event (04-14-12)06/05/12 <0.044 <0.044 <0.044 <0.044 0.044 0.1
10/09/12
injection event (09-13-12)11/12/12
02/18/13
05/13/13 <0.044 <0.044 <0.044 <0.044 <0.044 <0.044 0.044 0.1
08/21/13
11/11/13
02/10/14
05/12/14 <0.044 <0.044 <0.044 <0.044 <0.044 <0.044 0.044 0.1
08/18/14
11/11/14
02/23/15
05/12/15 <0.044 <0.044 <0.044 <0.044 <0.044 <0.044 0.044 0.1
08/24/15
11/10/15
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
Constituent Sample Date MW-15
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
MW-23 MW-24 LOD SWSL QA/QCMW-16 MW-17 MW-20 MW-21d MW-21s MW-22
dibromochloromethane 04/17/90
MCL = 80 (trihalomethane)07/11/91
FBAC = 3 (SWSL)05/28/92
NCGQS = 0.4 (2L Std)06/30/93
11/04/94
12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/98
04/26/99
11/22/99
05/23/00
11/29/00
06/05/01
11/13/01
06/04/02
03/12/03
06/18/03
12/08/03
06/22/04
11/30/04
06/01/05
11/02/05
05/22/06
11/27/06
06/12/07
12/12/07
06/17/08
11/05/08
05/19/09
11/18/09
06/21/10
11/18/10
injection event (03-29-11)05/23/11
08/23/11
injection event (09-28-11)11/15/11
02/21/12
injection event (04-14-12)06/05/12
10/09/12
injection event (09-13-12)11/12/12
02/18/13
05/13/13
08/21/13
11/11/13 <0.17 <0.17 <0.17 <0.17 0.47 J 0.17 3
02/10/14 0.17 3
05/12/14 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 3
08/18/14 0.17 3
11/11/14 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 3
02/23/15 0.17 3
05/12/15 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 3
08/24/15 0.17 3
11/10/15 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 3
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
SWSL QA/QC
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
Constituent Sample Date MW-1 MW-4 MW-5 MW-6 MW-6R MW-7 MW-7R MW-13 MW-14A MW-14B LOD
dibromochloromethane 04/17/90
MCL = 80 (trihalomethane)07/11/91
FBAC = 3 (SWSL)05/28/92
NCGQS = 0.4 (2L Std)06/30/93
11/04/94
12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/98
04/26/99
11/22/99
05/23/00
11/29/00
06/05/01
11/13/01
06/04/02
03/12/03
06/18/03
12/08/03
06/22/04
11/30/04
06/01/05
11/02/05
05/22/06
11/27/06
06/12/07
12/12/07
06/17/08
11/05/08
05/19/09
11/18/09
06/21/10
11/18/10
injection event (03-29-11)05/23/11
08/23/11
injection event (09-28-11)11/15/11
02/21/12
injection event (04-14-12)06/05/12
10/09/12
injection event (09-13-12)11/12/12
02/18/13
05/13/13
08/21/13
11/11/13 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 3
02/10/14 <0.17 <0.17 <0.17 <0.17 0.17 3
05/12/14 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 3
08/18/14 <0.17 <0.17 <0.17 <0.17 0.17 3
11/11/14 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 3
02/23/15 <0.17 <0.17 <0.17 <0.17 0.17 3
05/12/15 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 3
08/24/15 <0.17 <0.17 <0.17 <0.17 0.17 3
11/10/15 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 3
Constituent Sample Date MW-15 MW-16 MW-17 MW-20 MW-21d MW-21s MW-22 MW-23 MW-24 LOD SWSL QA/QC
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
1,2-dichlorobenzene 04/17/90
MCL = 600 07/11/91
FBAC = 5 (SWSL)05/28/92
NCGQS = 20 (2L Std)06/30/93
2L Std = 24 (pre- Jan. 2010)11/04/94
2L Std = 20 (Jan. 2010)12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/9804/26/99
11/22/99
05/23/00
11/29/00
06/05/0111/13/01
06/04/02 sr
03/12/03 ht
06/18/03
12/08/03 ic, cc06/22/04 ic, cc
11/30/04
06/01/05
11/02/05
05/22/06
11/27/06
06/12/07
12/12/07 <0.1 <0.1 <0.1 <0.1 0.1 1
06/17/08 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 5 ic, cc
11/05/08 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 5
05/19/09 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 0.27 5
11/18/09 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 0.27 5
06/21/10 <0.052 <0.052 <0.052 <0.052 <0.052 <0.052 0.052 5
11/18/10 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 0.27 5
injection event (03-29-11)05/23/11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 5
08/23/11 0.11 5
injection event (09-28-11)11/15/11 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 5
02/21/12 0.19 5
injection event (04-14-12)06/05/12 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 5
10/09/12 0.19 5
injection event (09-13-12)11/12/12 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 5
02/18/13 0.19 5
05/13/13 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 5
08/21/13 0.19 5
11/11/13 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 5
02/10/14 0.19 5
05/12/14 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 5
08/18/14 0.19 5
11/11/14 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 5
02/23/15 0.19 5
05/12/15 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 5
08/24/15 0.19 5
11/10/15 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 5
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
Constituent Sample Date MW-1 MW-4 MW-5 MW-6
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
LOD SWSL QA/QCMW-6R MW-7 MW-7R MW-13 MW-14A MW-14B
1,2-dichlorobenzene 04/17/90
MCL = 600 07/11/91
FBAC = 5 (SWSL)05/28/92
NCGQS = 20 (2L Std)06/30/93
2L Std = 24 (pre- Jan. 2010)11/04/94
2L Std = 20 (Jan. 2010)12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/9804/26/99
11/22/99
05/23/00
11/29/00
06/05/0111/13/01
06/04/02 sr
03/12/03 ht
06/18/03
12/08/03 ic, cc06/22/04 ic, cc
11/30/04
06/01/05
11/02/05
05/22/06
11/27/06
06/12/07
12/12/07 0.5 J <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
06/17/08 0.4 J <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 5 ic, cc
11/05/08 0.4 J <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 5
05/19/09 0.46 J <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 0.27 5
11/18/09 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 0.27 5
06/21/10 0.54 J <0.052 <0.052 <0.052 <0.052 <0.052 <0.052 <0.052 <0.052 0.052 5
11/18/10 0.61 J <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 0.27 5
injection event (03-29-11)05/23/11 0.66 J <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 5
08/23/11 <0.11 <0.11 <0.11 <0.11 0.11 5
injection event (09-28-11)11/15/11 0.66 J <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 5
02/21/12 <0.19 <0.19 <0.19 <0.19 0.19 5
injection event (04-14-12)06/05/12 0.5 J <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 5
10/09/12 <0.19 <0.19 <0.19 <0.19 0.19 5
injection event (09-13-12)11/12/12 0.56 J <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 5
02/18/13 <0.19 <0.19 <0.19 <0.19 0.19 5
05/13/13 0.63 J <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 5
08/21/13 <0.19 <0.19 <0.19 <0.19 0.19 5
11/11/13 0.56 J <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 5
02/10/14 <0.19 <0.19 <0.19 <0.19 0.19 5
05/12/14 0.64 J <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 5
08/18/14 <0.19 <0.19 <0.19 <0.19 0.19 5
11/11/14 0.62 J <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 5
02/23/15 <0.19 <0.19 <0.19 <0.19 0.19 5
05/12/15 0.51 J <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 5
08/24/15 <0.19 <0.19 <0.19 <0.19 0.19 5
11/10/15 0.64 J <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 5
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW-23 MW-24 LOD SWSL QA/QCMW-16 MW-17 MW-20 MW-21d MW-21s MW-22ConstituentSample Date MW-15
1,4-dichlorobenzene 04/17/90
MCL = 75 07/11/91
FBAC = 1 (SWSL)05/28/92
NCGQS = 6 (2L Std)06/30/93
2L Std = 1.4 (pre- Jan. 2010)11/04/94 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
2L Std = 6 (Jan. 2010)12/20/94 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
02/02/95 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
03/13/95 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/15/95 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
07/25/96 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
02/25/97 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
09/03/97 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
05/04/98 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/02/98 <5.0 <5.0 5 R <5.0 <5.0
04/26/99 <5.0 <5.0 <5.0 <5.0 <5.0
11/22/99 <5.0 <5.0 <5.0 <5.0 <5.0
05/23/00 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/29/00 <5.0 <5.0 <5.0 <5.0 <5.0
06/05/01 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/13/01 <5.0 <5.0 <5.0
06/04/02 <5.0 <5.0 <5.0 sr
03/12/03 <5.0 <5.0 <5.0 <5.0 ht
06/18/03 <5.0 <5.0 <5.0 <5.0 <5.0
12/08/03 <5.0 <5.0 <5.0 ic, cc
06/22/04 <5.0 <5.0 <5.0 ic, cc
11/30/04 <5.0 <5.0 <5.0
06/01/05 <5.0 <5.0 <5.0
11/02/05 <5.0 <5.0 <5.0
05/22/06 <5.0 <5.0 <5.0
11/27/06 <5.0 <5.0 <5.0
06/12/07 <0.1 <0.1 1 J <0.1 0.1 1
12/12/07 <0.1 <0.1 1 J 0.2 J 0.1 1
06/17/08 <0.1 0.7 J <0.1 1 J 0.9 J 0.4 J 0.1 1 ic, cc
11/05/08 <0.1 0.6 J <0.1 <0.1 0.9 J 0.2 J 0.1 1
05/19/09 <0.38 0.63 J <0.38 <0.38 1.9 0.74 J 0.38 1
11/18/09 <0.38 <0.38 <0.38 <0.38 1.1 <0.38 0.38 1
06/21/10 <0.1 <0.1 0.59 J <0.1 0.95 J 0.77 J 0.1 1
11/18/10 <0.38 1 <0.38 <0.38 0.9 J 0.65 J 0.38 1
injection event (03-29-11)05/23/11 <0.79 <0.79 <0.79 <0.79 0.87 J 0.96 J 0.79 1
08/23/11 0.79 1
injection event (09-28-11)11/15/11 <0.79 <0.79 <0.79 <0.79 <0.79 0.79 1
02/21/12 0.19 1
injection event (04-14-12)06/05/12 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 1
10/09/12 0.19 1
injection event (09-13-12)11/12/12 <0.19 <0.19 <0.19 0.79 J 0.6 J 0.19 1
02/18/13 0.19 1
05/13/13 <0.19 <0.19 <0.19 0.89 J 1.5 0.19 1
08/21/13 0.19 1
11/11/13 <0.19 <0.19 <0.19 1.3 0.63 J 0.19 1
02/10/14 0.19 1
05/12/14 <0.19 <0.19 <0.19 1.1 2.7 0.19 1
08/18/14 0.19 1
11/11/14 <0.19 <0.19 <0.19 1.2 0.64 J 0.19 1
02/23/15 0.19 1
05/12/15 <0.19 <0.19 <0.19 1.0 1.9 0.19 1
08/24/15 0.19 1
11/10/15 <0.19 <0.19 <0.19 1.4 1.1 0.19 1
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW-6R MW-7 MW-7R MW-13 MW-14A MW-14B
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
Constituent Sample Date MW-1 MW-4 MW-5 MW-6 LOD SWSL QA/QC
1,4-dichlorobenzene 04/17/90
MCL = 75 07/11/91
FBAC = 1 (SWSL)05/28/92
NCGQS = 6 (2L Std)06/30/93
2L Std = 1.4 (pre- Jan. 2010)11/04/94 <5.0 <5.0 <5.0 <5.0
2L Std = 6 (Jan. 2010)12/20/94 <5.0 <5.0 <5.0 <5.0
02/02/95 <5.0 <5.0 <5.0 <5.0
03/13/95 <5.0 <5.0 <5.0 <5.0
11/15/95 <5.0 <5.0 <5.0 <5.0
07/25/96 <5.0 <5.0 <5.0 <5.0
02/25/97 <5.0 <5.0 <5.0 <5.0
09/03/97 <5.0 <5.0 <5.0 <5.0
05/04/98 <5.0 <5.0 <5.0 <5.0
11/02/98 6 R <5.0 <5.0 <5.0
04/26/99 <5.0 <5.0 <5.0 <5.0
11/22/99 <5.0 <5.0 <5.0 <5.0
05/23/00 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/29/00 5 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
06/05/01 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/13/01 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
06/04/02 5 J <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 sr
03/12/03 5 J <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 ht
06/18/03 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
12/08/03 5 J <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 ic, cc
06/22/04 5 J <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 ic, cc
11/30/04 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
06/01/05 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/02/05 <5.0 <5.0 <5.0 6 <5.0 <5.0 <5.0
05/22/06 6 <5.0 <5.0 6 <5.0 <5.0 <5.0
11/27/06 6 <5.0 <5.0 5 <5.0 <5.0 <5.0
06/12/07 5 <0.1 <0.1 6 1.4 0.6 J <0.1 1.9 0.1 1
12/12/07 5.9 0.4 J <0.1 6.1 1 J 0.2 J 0.97 J 1.6 0.1 1
06/17/08 5.2 J 0.5 J <0.1 6.4 J 1.4 J 0.3 J 0.8 J 1.7 J <0.1 0.1 1 ic, cc
11/05/08 5.3 0.3 J <0.1 6.2 1.4 1 J 0.2 J 1.9 1.1 0.1 1
05/19/09 6.8 0.47 J <0.38 6.9 2 1.7 1.2 2.4 1.5 0.38 1
11/18/09 5.9 0.55 J <0.38 6.6 1.9 1.6 1.9 2.9 1.4 0.38 1
06/21/10 6.2 0.54 J <0.1 5.9 1.8 1.4 1.1 1.3 <0.1 0.1 1
11/18/10 7.1 0.75 J <0.38 6.6 2 <0.38 1.1 2.8 <0.38 0.38 1
injection event (03-29-11)05/23/11 6.3 <0.79 <0.79 6.9 2 0.93 J 1.3 2.3 <0.79 0.79 1
08/23/11 2.1 1.3 3.2 <0.79 0.79 1
injection event (09-28-11)11/15/11 7.4 <0.79 <0.79 6.7 1.6 <0.79 2 3.1 <0.79 0.79 1
02/21/12 1.8 0.76 J 2.9 <0.19 0.19 1
injection event (04-14-12)06/05/12 4.5 <0.19 <0.19 4.8 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 1
10/09/12 1.6 1.3 3.1 <0.19 0.19 1
injection event (09-13-12)11/12/12 7.1 0.64 J <0.19 7.6 2.2 <0.19 2.1 3.3 0.48 J 0.19 1
02/18/13 2.2 0.77 J 2.5 0.59 J 0.19 1
05/13/13 6.6 0.53 J <0.19 7.8 2.1 1 1.6 2.3 1 0.19 1
08/21/13 2.2 1.8 2.7 0.73 J 0.19 1
11/11/13 6.8 <0.19 <0.19 6.3 2.4 1 2.0 3.5 0.43 J 0.19 1
02/10/14 2.3 <0.19 1.9 <0.19 0.19 1
05/12/14 8.2 0.57 J <0.19 7.5 2.0 1.3 1.8 3.3 <0.19 0.19 1
08/18/14 2.5 1.2 4.1 <0.19 0.19 1
11/11/14 7.2 <0.19 <0.19 6.8 2.5 <0.19 2.4 3.7 <0.19 0.19 1
02/23/15 2.2 <0.19 2.6 <0.19 0.19 1
05/12/15 7.6 <0.19 <0.19 6.5 2.0 1.1 1.9 2.8 <0.19 0.19 1
08/24/15 2.2 1.6 3.7 <0.19 0.19 1
11/10/15 7.1 0.67 J <0.19 6.7 2.4 0.51 J 2.3 4.1 <0.19 0.19 1
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
Constituent Sample Date MW-15
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
MW-23 MW-24 LOD SWSL QA/QCMW-16 MW-17 MW-20 MW-21d MW-21s MW-22
dichlorodifluoromethane 04/17/90
MCL =07/11/91
FBAC = 5 (SWSL)05/28/92
NCGQS = 1000 (2L Std)06/30/93
2L Std = 1400 (pre- Jan. 2010)11/04/94
2L Std = 1000 (Jan. 2010)12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/98
04/26/99
11/22/99
05/23/00
11/29/00
06/05/01
11/13/01
06/04/02
03/12/03
06/18/03
12/08/03
06/22/04
11/30/04
06/01/05
11/02/05
05/22/06
11/27/06
06/12/07
12/12/07
06/17/08 0.8 J <0.1 0.1 5 ic, cc
11/05/08 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 5
05/19/09 <0.38 <0.38 <0.38 0.38 5
11/18/09
06/21/10 <0.091 <0.091 <0.091 0.091 5
11/18/10
injection event (03-29-11)05/23/11 <0.56 <0.56 <0.56 0.56 5
08/23/11
injection event (09-28-11)11/15/11
02/21/12
injection event (04-14-12)06/05/12 <0.2 <0.2 <0.2 0.2 5
10/09/12
injection event (09-13-12)11/12/12
02/18/13
05/13/13 <0.2 <0.2 0.92 J 0.2 5
08/21/13
11/11/13
02/10/14
05/12/14 <0.2 <0.2 <0.2 0.2 5
08/18/14
11/11/14
02/23/15
05/12/15 <0.20 0.76 J 1.6 J 0.20 5
08/24/15
11/10/15
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
Constituent Sample Date MW-1 MW-4 MW-5 MW-6
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
LOD SWSL QA/QCMW-6R MW-7 MW-7R MW-13 MW-14A MW-14B
dichlorodifluoromethane 04/17/90
MCL =07/11/91
FBAC = 5 (SWSL)05/28/92
NCGQS = 1000 (2L Std)06/30/93
2L Std = 1400 (pre- Jan. 2010)11/04/94
2L Std = 1000 (Jan. 2010)12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/98
04/26/99
11/22/99
05/23/00
11/29/00
06/05/01
11/13/01
06/04/02
03/12/03
06/18/03
12/08/03
06/22/04
11/30/04
06/01/05
11/02/05
05/22/06
11/27/06
06/12/07
12/12/07
06/17/08 <0.1 <0.1 0.1 5 ic, cc
11/05/08 <0.1 <0.1 0.73 J <0.1 <0.1 <0.1 <0.1 <0.1 0.1 5
05/19/09 <0.38 <0.38 <0.38 <0.38 0.38 5
11/18/09
06/21/10 <0.091 <0.091 <0.091 <0.091 0.091 5
11/18/10
injection event (03-29-11)05/23/11 <0.56 <0.56 <0.56 <0.56 0.56 5
08/23/11
injection event (09-28-11)11/15/11
02/21/12
injection event (04-14-12)06/05/12 <0.2 <0.2 <0.2 <0.2 0.2 5
10/09/12
injection event (09-13-12)11/12/12
02/18/13
05/13/13 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 0.2 5
08/21/13
11/11/13
02/10/14
05/12/14 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 0.2 5
08/18/14
11/11/14
02/23/15
05/12/15 <0.20 <0.20 <0.20 <0.20 <0.20 <0.20 0.20 5
08/24/15
11/10/15
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW-23 MW-24 LOD SWSL QA/QCMW-16 MW-17 MW-20 MW-21d MW-21s MW-22ConstituentSample Date MW-15
1,1-dichloroethane 04/17/90 <5.0 <5.0 <5.0 <5.0 <5.0
MCL =07/11/91 <5.0 <5.0 <5.0 <5.0 <5.0
FBAC = 5 (SWSL)05/28/92 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 9.5 13
NCGQS = 6 (2L Std)06/30/93 <5.0 <5.0 <5.0 <5.0 <5.0 14.8 10.8
2L Std = 70 (pre- Jan. 2010)11/04/94 <5.0 <5.0 <5.0 <5.0 24 30
2L Std = 6 (Jan. 2010)12/20/94 <5.0 <5.0 <5.0 <5.0 16 14
02/02/95 <5.0 <5.0 <5.0 <5.0 16 18
03/13/95 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 11 J 11 J cc
11/15/95 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 14 18 J is
07/25/96 <5.0 <5.0 <5.0 <5.0 13 11
02/25/97 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 9 10
09/03/97 <5.0 <5.0 <5.0 16 9
05/04/98 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 6 8
11/02/98 10 R <5.0 <5.0 11 9
04/26/99 <5.0 <5.0 <5.0 6 8
11/22/99 <5.0 <5.0 <5.0 8 7
05/23/00 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 7
11/29/00 <5.0 <5.0 <5.0 7 11
06/05/01 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 6
11/13/01 <5.0 7 J 6 J cc
06/04/02 <5.0 <5.0 <5.0 cc
03/12/03 <5.0 <5.0 <5.0 <5.0 ht
06/18/03 <5.0 <5.0 <5.0 <5.0 6 J ic, cc, ss
12/08/03 <5.0 <5.0 6 J ic, cc
06/22/04 <5.0 <5.0 7 J ic, cc
11/30/04 <5.0 <5.0 <5.0
06/01/05 <5.0 <5.0 6
11/02/05 <5.0 7 7
05/22/06 <5.0 <5.0 6
11/27/06 <5.0 6 5
06/12/07 <0.2 <0.2 4.3 J 7.5 0.2 5
12/12/07 <0.2 <0.2 4.3 J 5.9 0.2 5
06/17/08 <0.2 <0.2 <0.2 5 J 3.9 J 6.2 J 0.2 5 ic, cc
11/05/08 <0.2 <0.2 <0.2 <0.2 4.6 J 4.1 J 0.2 5
05/19/09 <0.33 <0.33 <0.33 <0.33 6.4 8 0.33 5
11/18/09 <0.33 <0.33 <0.33 <0.33 5.6 7.5 0.33 5
06/21/10 <0.05 <0.05 <0.05 <0.05 4.7 J 6.6 0.05 5
11/18/10 <0.33 <0.33 <0.33 <0.33 4.1 J 7 0.33 5
injection event (03-29-11)05/23/11 <0.08 <0.08 <0.08 <0.08 3.4 J 5.9 0.08 5
08/23/11 0.08 5
injection event (09-28-11)11/15/11 <0.08 <0.08 <0.08 2.8 J 5.2 0.08 5
02/21/12 0.13 5
injection event (04-14-12)06/05/12 <0.13 <0.13 <0.13 1.1 J 3.7 J 0.13 5
10/09/12 0.13 5
injection event (09-13-12)11/12/12 <0.13 <0.13 <0.13 2.8 J 6.3 0.13 5
02/18/13 0.13 5
05/13/13 <0.13 <0.13 <0.13 3.3 J 6 0.13 5
08/21/13 0.13 5
11/11/13 <0.13 2.1 J <0.13 3.6 J 4.2 J 0.13 5
02/10/14 0.13 5
05/12/14 <0.13 <0.13 <0.13 3.9 J 7.3 0.13 5
08/18/14 0.13 5
11/11/14 <0.13 <0.13 <0.13 4.1 J 4.9 J 0.13 5
02/23/15 0.13 5
05/12/15 <0.13 <0.13 <0.13 3.8 J 6.3 0.13 5
08/24/15 0.13 5
11/10/15 <0.13 <0.13 <0.13 4.0 J 5.9 0.13 5
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW-6R MW-7 MW-7R MW-13 MW-14A MW-14B
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
Constituent Sample Date MW-1 MW-4 MW-5 MW-6 LOD SWSL QA/QC
1,1-dichloroethane 04/17/90 <5.0 <5.0
MCL =07/11/91 <5.0 <5.0
FBAC = 5 (SWSL)05/28/92 54 <5.0 <5.0
NCGQS = 6 (2L Std)06/30/93 39.8 <5.0 <5.0
2L Std = 70 (pre- Jan. 2010)11/04/94 43 6 <5.0 <5.0
2L Std = 6 (Jan. 2010)12/20/94 20 <5.0 <5.0 <5.0
02/02/95 28 <5.0 <5.0 <5.0
03/13/95 32 J <5.0 <5.0 <5.0 cc
11/15/95 38 6 <5.0 <5.0 is
07/25/96 72 8 <5.0 <5.0
02/25/97 57 12 <5.0 <5.0
09/03/97 71 9 <5.0 <5.0
05/04/98 56 10 <5.0 <5.0
11/02/98 67 9 <5.0 <5.0
04/26/99 52 9 <5.0 <5.0
11/22/99 45 9 <5.0 <5.0
05/23/00 46 9 <5.0 <5.0 24 42 <5.0
11/29/00 49 9 <5.0 <5.0 42 36 <5.0
06/05/01 42 7 <5.0 <5.0 25 35 <5.0
11/13/01 49 J 10 J <5.0 <5.0 41 J 33 J <5.0 cc
06/04/02 31 J 7 J <5.0 <5.0 22 J 20 J <5.0 cc
03/12/03 30 J 9 J <5.0 <5.0 24 J 14 J <5.0 ht
06/18/03 30 J 8 J <5.0 <5.0 22 J 22 J <5.0 ic, cc, ss
12/08/03 26 J 5 J <5.0 <5.0 22 J 20 J <5.0 ic, cc
06/22/04 36 J 6 J <5.0 <5.0 25 J 24 J <5.0 ic, cc
11/30/04 19 J <5.0 <5.0 <5.0 16 J 8 J <5.0 ic, cc
06/01/05 26 5 <5.0 <5.0 19 18 <5.0
11/02/05 31 9 <5.0 <5.0 28 25 7
05/22/06 19 6 <5.0 <5.0 20 20 7
11/27/06 19 5 <5.0 <5.0 17 17 7
06/12/07 18.7 5.6 <0.2 <0.2 16.2 15.4 3.7 J 25.7 0.2 5
12/12/07 17 5.6 <0.2 <0.2 12.2 8.5 4.9 J 23.4 0.2 5
06/17/08 11 J 5.2 J <0.2 <0.2 13 J 13.3 J 3.1 J 26.2 J 3.4 J 0.2 5 ic, cc
11/05/08 11.7 3.7 J <0.2 <0.2 13.2 13.1 0.6 J 25.6 18.6 0.2 5
05/19/09 17 5.2 <0.33 <0.33 16 16 5 27 21 0.33 5
11/18/09 14 5.8 <0.33 <0.33 14 14 7 30 19 0.33 5
06/21/10 11 3.9 J <0.05 <0.05 11 9.9 4.8 J 16 13 0.05 5
11/18/10 12 4.6 J <0.33 <0.33 15 13 7.2 28 19 0.33 5
injection event (03-29-11)05/23/11 7.8 2.7 J <0.08 <0.08 10 9 6 21 11 0.08 5
08/23/11 13 14 27 15 0.08 5
injection event (09-28-11)11/15/11 9 3.2 J <0.08 <0.08 8.6 10 6 21 14 0.08 5
02/21/12 11 13 27 12 0.13 5
injection event (04-14-12)06/05/12 6.1 0.56 J <0.13 <0.13 9.3 6.6 5 22 12 0.13 5
10/09/12 9.2 12 21 16 0.13 5
injection event (09-13-12)11/12/12 8.2 3 J <0.13 <0.13 9.9 8.5 7 21 16 0.13 5
02/18/13 11 9.2 24 17 0.13 5
05/13/13 9.1 2.5 J <0.13 <0.13 11 10 7.1 22 14 0.13 5
08/21/13 9.7 11 20 14 0.13 5
11/11/13 6.8 <0.13 <0.13 <0.13 8.6 7.0 5.7 15 10 0.13 5
02/10/14 9.8 8.9 19 12 0.13 5
05/12/14 8.9 3.4 J <0.13 <0.13 9.4 9.3 7.4 19 10 0.13 5
08/18/14 11 9.6 20 14 0.13 5
11/11/14 6.2 2.4 J <0.13 <0.13 8.9 6.7 5.6 14 11 0.13 5
02/23/15 8.9 9.2 18 10 0.13 5
05/12/15 7.3 1.9 J <0.13 <0.13 8.8 9.0 7.1 17 7.8 0.13 5
08/24/15 8.0 6.7 13 10 0.13 5
11/10/15 6.3 2.3 J 9.2 8.2 6.4 15 10 0.13 5
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
Constituent Sample Date MW-15
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
MW-23 MW-24 LOD SWSL QA/QCMW-16 MW-17 MW-20 MW-21d MW-21s MW-22
1,2-dichloroethane 04/17/90
MCL =5 07/11/91
FBAC = 1 (SWSL)05/28/92
NCGQS = 0.4 (2L Std)06/30/93
2L Std = 0.38 (pre- Jan. 2010)11/04/94
2L Std = 0.4 (Jan. 2010)12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/98
04/26/99
11/22/99
05/23/00
11/29/00
06/05/01
11/13/01
06/04/02
03/12/03
06/18/03
12/08/03
06/22/04
11/30/04
06/01/05
11/02/05
05/22/06
11/27/06
06/12/07 <0.1 <0.1 <0.1 <0.1 0.1 1
12/12/07 <0.1 <0.1 <0.1 <0.1 0.1 1
06/17/08 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1 ic, cc
11/05/08 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
05/19/09 <0.65 <0.65 <0.65 <0.65 <0.65 <0.65 0.65 1
11/18/09 <0.65 <0.65 <0.65 <0.65 <0.65 <0.65 0.65 1
06/21/10 <0.082 <0.082 <0.082 <0.082 <0.082 <0.082 0.082 1
11/18/10 <0.65 <0.65 <0.65 <0.65 <0.65 <0.65 0.65 1
injection event (03-29-11)05/23/11 <0.47 <0.47 <0.47 <0.47 <0.47 <0.47 0.47 1
08/23/11 0.47 1
injection event (09-28-11)11/15/11 <0.47 <0.47 <0.47 <0.47 <0.47 0.47 1
02/21/12 0.21 1
injection event (04-14-12)06/05/12 <0.21 <0.21 <0.21 <0.21 <0.21 0.21 1
10/09/12 0.21 1
injection event (09-13-12)11/12/12 <0.21 <0.21 <0.21 <0.21 <0.21 0.21 1
02/18/13 0.21 1
05/13/13 <0.21 <0.21 <0.21 <0.21 <0.21 0.21 1
08/21/13 0.21 1
11/11/13 <0.21 <0.21 <0.21 <0.21 <0.21 0.21 1
02/10/14 0.21 1
05/12/14 <0.21 <0.21 <0.21 <0.21 <0.21 0.21 1
08/18/14 0.21 1
11/11/14 <0.21 <0.21 <0.21 <0.21 <0.21 0.21 1
02/23/15 0.21 1
05/12/15 <0.21 <0.21 <0.21 <0.21 <0.21 0.21 1
08/24/15 0.21 1
11/10/15 <0.21 <0.21 <0.21 <0.21 <0.21 0.21 1
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
Constituent Sample Date MW-1 MW-4 MW-5 MW-6
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
LOD SWSL QA/QCMW-6R MW-7 MW-7R MW-13 MW-14A MW-14B
1,2-dichloroethane 04/17/90
MCL =5 07/11/91
FBAC = 1 (SWSL)05/28/92
NCGQS = 0.4 (2L Std)06/30/93
2L Std = 0.38 (pre- Jan. 2010)11/04/94
2L Std = 0.4 (Jan. 2010)12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/98
04/26/99
11/22/99
05/23/00
11/29/00
06/05/01
11/13/01
06/04/02
03/12/03
06/18/03
12/08/03
06/22/04
11/30/04
06/01/05
11/02/05
05/22/06
11/27/06
06/12/07 0.8 J <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
12/12/07 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.5 J 0.1 1
06/17/08 0.6 J <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.5 J <0.1 0.1 1 ic, cc
11/05/08 0.5 J <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
05/19/09 0.94 J <0.65 <0.65 <0.65 <0.65 <0.65 <0.65 <0.65 <0.65 0.65 1
11/18/09 <0.65 <0.65 <0.65 <0.65 <0.65 <0.65 <0.65 <0.65 <0.65 0.65 1
06/21/10 0.54 J <0.082 <0.082 <0.082 <0.082 <0.082 <0.082 <0.082 <0.082 0.082 1
11/18/10 <0.65 <0.65 <0.65 <0.65 <0.65 <0.65 <0.65 <0.65 <0.65 0.65 1
injection event (03-29-11)05/23/11 0.6 J <0.47 <0.47 <0.47 <0.47 <0.47 <0.47 <0.47 <0.47 0.47 1
08/23/11 <0.47 <0.47 0.62 J <0.47 0.47 1
injection event (09-28-11)11/15/11 0.6 J <0.47 <0.47 <0.47 <0.47 <0.47 <0.47 0.53 J <0.47 0.47 1
02/21/12 <0.21 <0.21 <0.21 <0.21 0.21 1
injection event (04-14-12)06/05/12 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 0.21 1
10/09/12 <0.21 <0.21 <0.21 <0.21 0.21 1
injection event (09-13-12)11/12/12 0.62 J <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 0.52 J <0.21 0.21 1
02/18/13 <0.21 <0.21 0.62 J <0.21 0.21 1
05/13/13 0.45 J <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 0.21 1
08/21/13 <0.21 <0.21 0.60 J <0.21 0.21 1
11/11/13 0.46 J <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 0.56 J 0.43 J 0.21 1
02/10/14 <0.21 <0.21 <0.21 <0.21 0.21 1
05/12/14 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 0.21 1
08/18/14 <0.21 <0.21 0.61 J <0.21 0.21 1
11/11/14 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 0.21 1
02/23/15 <0.21 <0.21 <0.21 <0.21 0.21 1
05/12/15 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 0.21 1
08/24/15 <0.21 <0.21 <0.21 <0.21 0.21 1
11/10/15 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 0.21 1
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW-23 MW-24 LOD SWSL QA/QCMW-16 MW-17 MW-20 MW-21d MW-21s MW-22ConstituentSample Date MW-15
1,1-dichloroethene 04/17/90 <5.0 <5.0 <5.0 <5.0 <5.0
MCL = 7 07/11/91 <5.0 <5.0 <5.0 <5.0 <5.0
FBAC = 5 (SWSL)05/28/92 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
NCGQS = 7 (2L Std)06/30/93 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/04/94 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
12/20/94 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
02/02/95 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
03/13/95 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/15/95 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
07/25/96 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
02/25/97 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
09/03/97 <5.0 <5.0 <5.0 <5.0 <5.0
05/04/98 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/02/98 <5.0 <5.0 <5.0 <5.0 <5.0
04/26/99 <5.0 <5.0 <5.0 <5.0 <5.0
11/22/99 <5.0 <5.0 <5.0 <5.0 <5.0
05/23/00 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/29/00 <5.0 <5.0 <5.0 <5.0 <5.0
06/05/01 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/13/01 <5.0 <5.0 <5.0
06/04/02 <5.0 <5.0 <5.0
03/12/03 <5.0 <5.0 <5.0 <5.0
06/18/03 <5.0 <5.0 <5.0 <5.0 <5.0
12/08/03 <5.0 <5.0 <5.0
06/22/04 <5.0 <5.0 <5.0
11/30/04 <5.0 <5.0 <5.0
06/01/05 <5.0 <5.0 <5.0
11/02/05 <5.0 <5.0 <5.0
05/22/06 <5.0 <5.0 <5.0
11/27/06 <5.0 <5.0 <5.0
06/12/07 <0.1 <0.1 <0.1 <0.1 0.1 5
12/12/07 <0.1 <0.1 <0.1 <0.1 0.1 5
06/17/08 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 5
11/05/08 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 5
05/19/09 <0.24 <0.24 <0.24 <0.24 <0.24 <0.24 0.24 5
11/18/09 <0.24 <0.24 <0.24 <0.24 <0.24 <0.24 0.24 5
06/21/10 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 5
11/18/10 <0.24 <0.24 <0.24 <0.24 <0.24 <0.24 0.24 5
injection event (03-29-11)05/23/11 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 0.6 5
08/23/11 0.6 5
injection event (09-28-11)11/15/11 <0.6 <0.6 <0.6 <0.6 <0.6 0.6 5
02/21/12 0.21 5
injection event (04-14-12)06/05/12 <0.21 <0.21 <0.21 <0.21 <0.21 0.21 5
10/09/12 0.21 5
injection event (09-13-12)11/12/12 <0.21 <0.21 <0.21 <0.21 <0.21 0.21 5
02/18/13 0.21 5
05/13/13 <0.21 <0.21 <0.21 <0.21 <0.21 0.21 5
08/21/13 0.21 5
11/11/13 <0.21 <0.21 <0.21 <0.21 <0.21 0.21 5
02/10/14 0.21 5
05/12/14 <0.21 <0.21 <0.21 <0.21 <0.21 0.21 5
08/18/14 0.21 5
11/11/14 <0.21 <0.21 <0.21 <0.21 <0.21 0.21 5
02/23/15 0.21 5
05/12/15 <0.21 <0.21 <0.21 <0.21 <0.21 0.21 5
08/24/15 0.21 5
11/10/15 <0.21 <0.21 <0.21 <0.21 <0.21 0.21 5
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW-6R MW-7 MW-7R MW-13 MW-14A MW-14B
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
Constituent Sample Date MW-1 MW-4 MW-5 MW-6 LOD SWSL QA/QC
1,1-dichloroethene 04/17/90 <5.0 <5.0
MCL = 7 07/11/91 <5.0 <5.0
FBAC = 5 (SWSL)05/28/92 <5.0 <5.0 <5.0
NCGQS = 7 (2L Std)06/30/93 <5.0 <5.0 <5.0
11/04/94 <5.0 <5.0 <5.0 <5.0
12/20/94 <5.0 <5.0 <5.0 <5.0
02/02/95 <5.0 <5.0 <5.0 <5.0
03/13/95 <5.0 <5.0 <5.0 <5.0
11/15/95 <5.0 <5.0 <5.0 <5.0
07/25/96 6 <5.0 <5.0 <5.0
02/25/97 <5.0 <5.0 <5.0 <5.0
09/03/97 5 <5.0 <5.0 <5.0
05/04/98 <5.0 <5.0 <5.0 <5.0
11/02/98 <5.0 <5.0 <5.0 <5.0
04/26/99 <5.0 <5.0 <5.0 <5.0
11/22/99 <5.0 <5.0 <5.0 <5.0
05/23/00 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/29/00 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
06/05/01 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/13/01 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
06/04/02 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
03/12/03 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
06/18/03 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
12/08/03 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
06/22/04 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/30/04 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
06/01/05 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/02/05 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
05/22/06 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/27/06 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
06/12/07 1.5 J <0.1 <0.1 <0.1 0.6 J <0.1 <0.1 1.4 J 0.1 5
12/12/07 1.4 J <0.1 <0.1 <0.1 0.3 J <0.1 <0.1 1.5 J 0.1 5
06/17/08 0.8 J <0.1 <0.1 <0.1 0.6 J <0.1 <0.1 1.5 J <0.1 0.1 5 ic, cc
11/05/08 0.7 J <0.1 <0.1 <0.1 0.4 J 0.3 J <0.2 1.1 J 0.4 J 0.1 5
05/19/09 1.1 J <0.24 <0.24 <0.24 0.43 J <0.24 <0.24 1.1 J 0.62 J 0.24 5
11/18/09 0.74 J <0.24 <0.24 <0.24 0.43 J <0.24 <0.24 1.4 J 0.41 J 0.24 5
06/21/10 0.73 J <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 0.71 J <0.15 0.15 5
11/18/10 0.73 J <0.24 <0.24 <0.24 0.41 J <0.24 <0.24 1.4 J <0.24 0.24 5
injection event (03-29-11)05/23/11 0.61 J <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 1.2 J <0.6 0.6 5
08/23/11 <0.6 <0.6 1.3 J <0.6 0.6 5
injection event (09-28-11)11/15/11 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 0.75 J <0.6 0.6 5
02/21/12 <0.21 <0.21 0.98 J <0.21 0.21 5
injection event (04-14-12)06/05/12 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 0.58 J <0.21 0.21 5
10/09/12 <0.21 <0.21 <0.21 <0.21 0.21 5
injection event (09-13-12)11/12/12 0.43 J <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 0.21 5
02/18/13 <0.21 <0.21 0.74 J <0.21 0.21 5
05/13/13 0.8 J <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 0.44 J <0.21 0.21 5
08/21/13 <0.21 <0.21 0.47 J <0.21 0.21 5
11/11/13 0.49 J <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 0.59 J <0.21 0.21 5
02/10/14 <0.21 <0.21 0.51 J <0.21 0.21 5
05/12/14 0.72 J <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 0.59 J <0.21 0.21 5
08/18/14 <0.21 <0.21 0.82 J <0.21 0.21 5
11/11/14 0.41 J <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 0.47 J <0.21 0.21 5
02/23/15 <0.21 <0.21 0.70 J <0.21 0.21 5
05/12/15 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 0.55 J <0.21 0.21 5
08/24/15 <0.21 <0.21 0.59 J <0.21 0.21 5
11/10/15 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 0.57 J <0.21 0.21 5
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
Constituent Sample Date MW-15
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
MW-23 MW-24 LOD SWSL QA/QCMW-16 MW-17 MW-20 MW-21d MW-21s MW-22
cis-1,2-dichloroethene 04/17/90 <5.0 <5.0 <5.0 <5.0 <5.0
MCL = 70 07/11/91 <5.0 <5.0 <5.0 <5.0 <5.0
FBAC = 5 (SWSL)05/28/92 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
NCGQS = 70 (2L Std)06/30/93 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/04/94 8 R <5.0 <5.0 <5.0 6 10
12/20/94 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
02/02/95 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
03/13/95 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/15/95 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 is
07/25/96 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
02/25/97 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
09/03/97 <5.0 <5.0 <5.0 8 5
05/04/98 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/02/98 8 R <5.0 <5.0 5 5
04/26/99 <5.0 <5.0 <5.0 <5.0 6
11/22/99 <5.0 <5.0 <5.0 5 5
05/23/00 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 6
11/29/00 <5.0 <5.0 <5.0 <5.0 10
06/05/01 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 6
11/13/01 <5.0 <5.0 6 J cc
06/04/02 <5.0 <5.0 <5.0
03/12/03 <5.0 <5.0 <5.0 <5.0 ht
06/18/03 <5.0 <5.0 <5.0 <5.0 6 J ic, cc, ss
12/08/03 <5.0 <5.0 6 J ic, cc
06/22/04 <5.0 <5.0 7 J ic, cc
11/30/04 <5.0 <5.0 <5.0
06/01/05 <5.0 <5.0 6
11/02/05 <5.0 <5.0 6
05/22/06 <5.0 <5.0 <5.0
11/27/06 <5.0 <5.0 <5.0
06/12/07 <0.1 <0.1 2.9 J 5.6 0.1 5
12/12/07 <0.1 <0.1 2.5 J 3.3 J 0.1 5
06/17/08 <0.1 1 J <0.1 5 J 2.4 J 4.8 J 0.1 5 ic, cc
11/05/08 <0.1 0.9 J <0.1 <0.1 3.2 J 2.4 J 0.1 5
05/19/09 <0.36 0.67 J <0.36 <0.36 4.3 J 5.8 0.36 5
11/18/09 <0.36 1 J <0.36 <0.36 3.5 J 3.6 J 0.36 5
06/21/10 <0.075 <0.075 0.68 J <0.075 2.8 J 5.8 0.075 5
11/18/10 <0.36 1.6 J <0.36 <0.36 3.1 J 4.2 J 0.36 5
injection event (03-29-11)05/23/11 <0.72 <0.72 <0.72 <0.72 2.1 J 4.7 J 0.72 5
08/23/11
injection event (09-28-11)11/15/11 <0.72 <0.72 <0.72 2.3 J 2.9 J 0.72 5
02/21/12
injection event (04-14-12)06/05/12 <0.15 <0.15 <0.15 2.1 J 4 J 0.15 5
10/09/12
injection event (09-13-12)11/12/12 <0.15 <0.15 <0.15 1.7 J 2.4 J 0.15 5
02/18/13
05/13/13 <0.15 <0.15 <0.15 2.4 J 6 0.15 5
08/21/13 0.15 5
11/11/13 <0.15 2.7 J <0.15 2.8 J 1.9 J 0.15 5
02/10/14 0.15 5
05/12/14 <0.15 <0.15 <0.15 1.9 J 5.6 0.15 5
08/18/14 0.15 5
11/11/14 <0.15 <0.15 <0.15 2.3 J 1.5 J 0.15 5
02/23/15 0.15 5
05/12/15 <0.15 <0.15 <0.15 2.2 J 5.3 0.15 5
08/24/15 0.15 5
11/10/15 <0.15 <0.15 <0.15 3.0 J 2.2 J 0.15 5
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
Constituent Sample Date MW-1 MW-4 MW-5 MW-6
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
LOD SWSL QA/QCMW-6R MW-7 MW-7R MW-13 MW-14A MW-14B
cis-1,2-dichloroethene 04/17/90 <5.0 <5.0
MCL = 70 07/11/91 <5.0 <5.0
FBAC = 5 (SWSL)05/28/92 <5.0 <5.0 <5.0
NCGQS = 70 (2L Std)06/30/93 <5.0 <5.0 <5.0
11/04/94 24 <5.0 <5.0 58
12/20/94 11 <5.0 <5.0 11
02/02/95 17 <5.0 <5.0 39
03/13/95 19 <5.0 <5.0 21
11/15/95 28 <5.0 <5.0 26 J is
07/25/96 53 <5.0 <5.0 23
02/25/97 50 <5.0 <5.0 23
09/03/97 98 <5.0 <5.0 22
05/04/98 95 <5.0 <5.0 20
11/02/98 130 <5.0 <5.0 20
04/26/99 126 <5.0 <5.0 19
11/22/99 119 <5.0 <5.0 11
05/23/00 124 <5.0 <5.0 9 11 12 <5.0
11/29/00 157 <5.0 <5.0 9 20 13 <5.0
06/05/01 151 <5.0 <5.0 8 16 14 <5.0
11/13/01 185 J 6 J < 5.0 9 J 25 J 14 J <5.0 cc
06/04/02 166 7 <5.0 <5.0 20 13 <5.0
03/12/03 169 J 7 J <5.0 <5.0 20 J 9 J <5.0 ht
06/18/03 182 J 10 J <5.0 <5.0 23 J 17 J <5.0 ic, cc, ss
12/08/03 160 J 6 J <5.0 <5.0 26 J 16 J <5.0 ic, cc
06/22/04 198 J 8 J <5.0 <5.0 31 J 21 J <5.0 ic, cc
11/30/04 118 J <5.0 <5.0 <5.0 19 J 8 J <5.0 ic, cc
06/01/05 146 9 <5.0 <5.0 26 24 <5.0
11/02/05 232 14 <5.0 <5.0 34 26 <5.0
05/22/06 97 8 <5.0 <5.0 20 17 <5.0
11/27/06 185 11 <5.0 <5.0 27 19 <5.0
06/12/07 166 11.8 <0.1 1.2 J 29.6 22.1 2.3 J 53.6 0.1 5
12/12/07 178 11.4 <0.1 1.1 J 20.7 9.9 3.5 J 57 0.1 5
06/17/08 133 J 11.7 J <0.1 1 J 26.1 J 18.8 J 2.5 J 60.1 J 7.2 J 0.1 5 ic, cc
11/05/08 135 7.6 <0.1 0.8 J 28 22.2 0.6 J 63.9 33.7 0.1 5
05/19/09 170 8.8 <0.36 0.68 J 35 29 3.3 J 59 35 0.36 5
11/18/09 160 11 <0.36 0.76 J 34 29 5.8 75 38 0.36 5
06/21/10 130 7.8 <0.075 0.58 J 32 24 3.5 J 43 25 0.075 5
11/18/10 150 7.9 <0.36 0.73 J 37 27 4.9 J 81 36 0.36 5
injection event (03-29-11)05/23/11 94 4.5 J <0.72 <0.72 22 18 3.8 J 48 19 0.72 5
08/23/11 31 29 77 28 0.72 5
injection event (09-28-11)11/15/11 130 5.6 <0.72 <0.72 21 21 5.4 45 29 0.72 5
02/21/12 25 21 63 23 0.15 5
injection event (04-14-12)06/05/12 110 3.6 J <0.15 0.55 J <0.15 15 4.7 J 35 22 0.15 5
10/09/12 17 17 8.5 28 0.15 5
injection event (09-13-12)11/12/12 120 4.2 J <0.15 0.41 J 22 9.1 5.4 13 28 0.15 5
02/18/13 26 5.2 35 26 0.15 5
05/13/13 140 3.3 J <0.15 <0.15 29 4.5 J 5.6 32 28 0.15 5
08/21/13 28 4.7 35 25 0.15 5
11/11/13 110 <0.15 <0.15 0.48 J 29 2.0 J 4.8 J 48 18 0.15 5
02/10/14 30 8 46 15 0.15 5
05/12/14 130 2.9 J <0.15 0.41 J 24 11 4.2 J 46 14 0.15 5
08/18/14 36 18 83 17 0.15 5
11/11/14 110 2.3 J <0.15 <0.15 29 13 4.7 J 68 16 0.15 5
02/23/15 32 20 85 18 0.15 5
05/12/15 140 1.9 J <0.15 <0.15 29 19 5.3 74 12 0.15 5
08/24/15 26 16 64 16 0.15 5
11/10/15 97 1.9 J <0.15 <0.15 26 17 4.9 J 70 17 0.15 5
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW-23 MW-24 LOD SWSL QA/QCMW-16 MW-17 MW-20 MW-21d MW-21s MW-22ConstituentSample Date MW-15
trans-1,2-dichloroethene 04/17/90
MCL = 100 07/11/91
FBAC = 5 (SWSL)05/28/92
NCGQS = 100 (2L Std)06/30/93
11/04/94
12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/98
04/26/99
11/22/99
05/23/00
11/29/00
06/05/01
11/13/01
06/04/02
03/12/03
06/18/03
12/08/03
06/22/04
11/30/04
06/01/05
11/02/05
05/22/06
11/27/06
06/12/07 <0.1 <0.1 <0.1 <0.1 0.1 5
12/12/07 <0.1 <0.1 <0.1 <0.1 0.1 5
06/17/08 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 5
11/05/08 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 5
05/19/09 <0.34 <0.34 <0.34 <0.34 <0.34 <0.34 0.34 5
11/18/09 <0.34 <0.34 <0.34 <0.34 <0.34 <0.34 0.34 5
06/21/10 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 5
11/18/10 <0.34 <0.34 <0.34 <0.34 <0.34 <0.34 0.34 5
injection event (03-29-11)05/23/11 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 0.12 5
08/23/11 0.12 5
injection event (09-28-11)11/15/11 <0.12 <0.12 <0.12 <0.12 <0.12 0.12 5
02/21/12 0.21 5
injection event (04-14-12)06/05/12 <0.21 <0.21 <0.21 <0.21 <0.21 0.21 5
10/09/12 0.21 5
injection event (09-13-12)11/12/12 <0.21 <0.21 <0.21 <0.21 <0.21 0.21 5
02/18/13 0.21 5
05/13/13 <0.21 <0.21 <0.21 <0.21 <0.21 0.21 5
08/21/13 0.21 5
11/11/13 <0.21 <0.21 <0.21 <0.21 <0.21 0.21 5
02/10/14 0.21 5
05/12/14 <0.21 <0.21 <0.21 <0.21 <0.21 0.21 5
08/18/14 0.21 5
11/11/14 <0.21 <0.21 <0.21 <0.21 <0.21 0.21 5
02/23/15 0.21 5
05/12/15 <0.21 <0.21 <0.21 <0.21 <0.21 0.21 5
08/24/15 0.21 5
11/10/15 <0.21 <0.21 <0.21 <0.21 <0.21 0.21 5
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW-6R MW-7 MW-7R MW-13 MW-14A MW-14B
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
Constituent Sample Date MW-1 MW-4 MW-5 MW-6 LOD SWSL QA/QC
trans-1,2-dichloroethene 04/17/90
MCL = 100 07/11/91
FBAC = 5 (SWSL)05/28/92
NCGQS = 100 (2L Std)06/30/93
11/04/94
12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/98
04/26/99
11/22/99
05/23/00
11/29/00
06/05/01
11/13/01
06/04/02
03/12/03
06/18/03
12/08/03
06/22/04
11/30/04
06/01/05
11/02/05
05/22/06
11/27/06
06/12/07 1.1 J <0.1 <0.1 0.8 J <0.1 <0.1 <0.1 <0.1 0.1 5
12/12/07 1.1 J <0.1 <0.1 0.5 J <0.1 <0.1 <0.1 0.4 J 0.1 5
06/17/08 1 J <0.1 <0.1 0.5 J <0.1 <0.1 <0.1 0.4 J <0.1 0.1 5 ic, cc
11/05/08 0.8 J <0.1 <0.1 0.4 J 0.4 J 0.2 J <0.2 0.6 J 0.3 J 0.1 5
05/19/09 0.99 J <0.34 <0.34 <0.34 <0.34 <0.34 <0.34 <0.34 <0.34 0.34 5
11/18/09 0.88 J <0.34 <0.34 0.43 J 0.42 J <0.34 <0.34 0.71 J 0.44 J 0.34 5
06/21/10 0.83 J <0.11 <0.11 0.42 J <0.11 <0.11 <0.11 <0.11 <0.11 0.11 5
11/18/10 1.2 J <0.34 <0.34 0.49 J <0.34 <0.34 <0.34 0.66 J <0.34 0.34 5
injection event (03-29-11)05/23/11 1 J <0.12 <0.12 0.42 J <0.12 <0.12 <0.12 0.53 J <0.12 0.12 5
08/23/11 <0.12 <0.12 0.41 J <0.12 0.12 5
injection event (09-28-11)11/15/11 0.93 J <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 0.12 5
02/21/12 <0.21 <0.21 <0.21 <0.21 0.21 5
injection event (04-14-12)06/05/12 0.57 J <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 0.21 5
10/09/12 <0.21 <0.21 <0.21 <0.21 0.21 5
injection event (09-13-12)11/12/12 0.78 J <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 0.21 5
02/18/13 <0.21 <0.21 <0.21 <0.21 0.21 5
05/13/13 0.86 J <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 0.21 5
08/21/13 <0.21 <0.21 <0.21 <0.21 0.21 5
11/11/13 0.72 J <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 0.21 5
02/10/14 <0.21 <0.21 <0.21 <0.21 0.21 5
05/12/14 0.76 J <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 0.21 5
08/18/14 <0.21 <0.21 0.45 J <0.21 0.21 5
11/11/14 0.65 J <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 0.43 J <0.21 0.21 5
02/23/15 <0.21 <0.21 0.58 J <0.21 0.21 5
05/12/15 0.73 J <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 0.21 5
08/24/15 <0.21 <0.21 0.50 J <0.21 0.21 5
11/10/15 0.74 J <0.21 <0.21 0.40 J <0.21 <0.21 <0.21 0.60 J <0.21 0.21 5
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
Constituent Sample Date MW-15
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
MW-23 MW-24 LOD SWSL QA/QCMW-16 MW-17 MW-20 MW-21d MW-21s MW-22
dichloromethane 04/17/90 <10.0 <10.0 <10.0 <10.0 <10.0
(methylene chloride)07/11/91 <10.0 <10.0 <10.0 <10.0 <10.0
MCL = 5 05/28/92 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
FBAC = 1 (SWSL)06/30/93 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
NCGQS = 5 (2L Std)11/04/94 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
2L Std = 4.6 (pre- Jan. 2010)12/20/94 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 i
2L Std = 5 (Jan. 2010)02/02/95 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
03/13/95 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
11/15/95 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
07/25/96 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 f
02/25/97 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 i,f
09/03/97 <10.0 <10.0 <10.0 <10.0 <10.0 i,f
05/04/98 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 i,f
11/02/98 <10.0 <10.0 <10.0 <10.0 <10.0 i,f,t
04/26/99 <10.0 <10.0 <10.0 <10.0 <10.0 i,f,t
11/22/99 <10.0 <10.0 <10.0 <10.0 <10.0 i
05/23/00 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
11/29/00 <10.0 <10.0 <10.0 <10.0 <10.0
06/05/01 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 f,t
11/13/01 <10.0 <10.0 <10.0 i,f
06/04/02 <10.0 <10.0 <10.0
03/12/03 <10.0 <10.0 <10.0 <10.0
06/18/03 <10.0 <10.0 <10.0 <10.0
12/08/03 <10.0 <10.0 <10.0
06/22/04 <10.0 <10.0 <10.0
11/30/04 <10.0 <10.0 <10.0
06/01/05 <10.0
11/02/05 <10.0
05/22/06 <10.0 <10.0 <10.0 i,t
11/27/06 <10.0 <10.0 <10.0
06/12/07 <0.6 <0.6 <0.6 <0.6 0.6 1 f
12/12/07 <0.6 <0.6 <0.6 <0.6 0.6 1
06/17/08 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 0.6 1 ic, cc
11/05/08 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 0.6 1 t
05/19/09 <0.53 <0.53 <0.53 <0.53 <0.53 <0.53 0.53 1
11/18/09 <0.53 <0.53 <0.53 <0.53 <0.53 <0.53 0.53 1
06/21/10 <0.07 <0.07 <0.07 <0.07 <0.07 <0.07 0.07 1
11/18/10 <0.53 <0.53 <0.53 <0.53 <0.53 <0.53 0.53 1
injection event (03-29-11)05/23/11 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 1
08/23/11
injection event (09-28-11)11/15/11 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 1
02/21/12
injection event (04-14-12)06/05/12 <0.23 <0.23 <0.23 <0.23 <0.23 0.23 1
10/09/12
injection event (09-13-12)11/12/12 <0.23 <0.23 <0.23 <0.23 <0.23 0.23 1
02/18/13
05/13/13 <0.23 <0.23 <0.23 <0.23 <0.23 0.23 1
08/21/13 0.23 1
11/11/13 <0.23 <0.23 <0.23 <0.23 <0.23 0.23 1
02/10/14 0.23 1
05/12/14 <0.23 <0.23 <0.23 <0.23 <0.23 0.23 1
08/18/14 0.23 1
11/11/14 <0.23 <0.23 <0.23 <0.23 <0.23 0.23 1
02/23/15 0.23 1
05/12/15 <0.23 <0.23 <0.23 <0.23 <0.23 0.23 1
08/24/15 0.23 1
11/10/15 <0.23 <0.23 <0.23 <0.23 <0.23 0.23 1
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
Constituent Sample Date MW-1 MW-4 MW-5 MW-6
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
LOD SWSL QA/QCMW-6R MW-7 MW-7R MW-13 MW-14A MW-14B
dichloromethane 04/17/90 <10.0 <10.0
(methylene chloride)07/11/91 <10.0 <10.0
MCL = 5 05/28/92 <10.0 <10.0 <10.0
FBAC = 1 (SWSL)06/30/93 <10.0 <10.0 <10.0
NCGQS = 5 (2L Std)11/04/94 <10.0 <10.0 <10.0 <10.0
2L Std = 4.6 (pre- Jan. 2010)12/20/94 <10.0 <10.0 <10.0 82 B i
2L Std = 5 (Jan. 2010)02/02/95 <10.0 <10.0 <10.0 <10.0
03/13/95 <10.0 <10.0 <10.0 <10.0
11/15/95 <10.0 <10.0 <10.0 <10.0
07/25/96 <10.0 <10.0 <10.0 <10.0 f
02/25/97 <10.0 <10.0 <10.0 <10.0 i,f
09/03/97 <10.0 <10.0 <10.0 <10.0 i,f
05/04/98 <10.0 <10.0 <10.0 <10.0 i,f
11/02/98 <10.0 <10.0 <10.0 <10.0 i,f,t
04/26/99 <10.0 <10.0 <10.0 <10.0 i,f,t
11/22/99 <10.0 <10.0 <10.0 <10.0 i
05/23/00 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
11/29/00 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
06/05/01 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 f,t
11/13/01 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 i,f
06/04/02 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
03/12/03 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
06/18/03 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
12/08/03 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
06/22/04 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
11/30/04 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
06/01/05 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
11/02/05 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
05/22/06 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 i,t
11/27/06 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
06/12/07 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 0.6 1 f
12/12/07 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 0.6 1
06/17/08 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 0.6 1 ic, cc
11/05/08 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 0.6 1 t
05/19/09 <0.53 <0.53 <0.53 <0.53 <0.53 <0.53 <0.53 <0.53 <0.53 0.53 1
11/18/09 <0.53 <0.53 <0.53 <0.53 <0.53 <0.53 <0.53 <0.53 <0.53 0.53 1
06/21/10 <0.07 <0.07 <0.07 <0.07 <0.07 <0.07 <0.07 <0.07 <0.07 0.07 1
11/18/10 <0.53 <0.53 <0.53 <0.53 <0.53 <0.53 <0.53 <0.53 <0.53 0.53 1
injection event (03-29-11)05/23/11 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 1
08/23/11 0.45 J 0.44 J <0.14 0.14 1
injection event (09-28-11)11/15/11 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 1
02/21/12 <0.23 <0.23 <0.23 <0.23 0.23 1
injection event (04-14-12)06/05/12 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 0.23 1
10/09/12 <0.23 <0.23 <0.23 <0.23 0.23 1
injection event (09-13-12)11/12/12 <0.23 <0.23 <0.23 <0.23 <0.23 0.64 J <0.23 0.6 J <0.23 0.23 1
02/18/13 <0.23 <0.23 <0.23 <0.23 0.23 1
05/13/13 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 0.23 1
08/21/13 <0.23 <0.23 <0.23 <0.23 0.23 1
11/11/13 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 0.23 1
02/10/14 <0.23 <0.23 <0.23 <0.23 0.23 1
05/12/14 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 0.23 1
08/18/14 <0.23 <0.23 <0.23 <0.23 0.23 1
11/11/14 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 0.23 1
02/23/15 <0.23 <0.23 <0.23 <0.23 0.23 1
05/12/15 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 0.23 1
08/24/15 <0.23 <0.23 <0.23 <0.23 0.23 1
11/10/15 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 0.23 1
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW-23 MW-24 LOD SWSL QA/QCMW-16 MW-17 MW-20 MW-21d MW-21s MW-22ConstituentSample Date MW-15
1,2-dichloropropane 04/17/90
MCL = 5 07/11/91
FBAC = 1 (SWSL)05/28/92
NCGQS = 0.6 (2L Std)06/30/93
2L Std = 0.51 (pre- Jan. 2010)11/04/94
2L Std = 0.6 (Jan. 2010)12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/98
04/26/99
11/22/99
05/23/00
11/29/00
06/05/01
11/13/01
06/04/02
03/12/03
06/18/03
12/08/03
06/22/04
11/30/04
06/01/05
11/02/05
05/22/06
11/27/06
06/12/07 <0.1 <0.1 <0.1 <0.1 0.1 1
12/12/07 <0.1 <0.1 <0.1 <0.1 0.1 1
06/17/08 <0.1 <0.1 <0.1 1 J 0.4 J 0.6 J 0.1 1 ic, cc
11/05/08 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
05/19/09 <0.2 <0.2 <0.2 <0.2 0.6 J 0.75 J 0.2 1
11/18/09 <0.2 <0.2 <0.2 <0.2 0.46 J 0.7 J 0.2 1
06/21/10 <0.098 <0.098 <0.098 <0.098 0.42 J 0.63 J 0.098 1
11/18/10 <0.2 <0.2 <0.2 <0.2 0.45 J 0.73 J 0.2 1
injection event (03-29-11)05/23/11 <0.59 <0.59 <0.59 <0.59 <0.59 <0.59 0.59 1
08/23/11 0.59 1
injection event (09-28-11)11/15/11 <0.59 <0.59 <0.59 <0.59 <0.59 0.59 1
02/21/12 0.1 1
injection event (04-14-12)06/05/12 <0.1 <0.1 <0.1 <0.1 0.51 J 0.1 1
10/09/12 0.1 1
injection event (09-13-12)11/12/12 <0.1 <0.1 <0.1 <0.1 0.61 J 0.1 1
02/18/13 0.1 1
05/13/13 <0.1 <0.1 <0.1 <0.1 0.89 J 0.1 1
08/21/13 0.1 1
11/11/13 <0.10 <0.10 <0.10 <0.10 0.43 J 0.10 1
02/10/14 0.10 1
05/12/14 <0.10 <0.10 <0.10 <0.10 0.47 J 0.10 1
08/18/14 0.10 1
11/11/14 <0.10 <0.10 <0.10 <0.10 0.67 J 0.10 1
02/23/15 0.10 1
05/12/15 <0.10 <0.10 <0.10 <0.10 0.57 J 0.10 1
08/24/15 0.10 1
11/10/15 <0.10 <0.10 <0.10 <0.10 0.58 J 0.10 1
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW-6R MW-7 MW-7R MW-13 MW-14A MW-14B
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
Constituent Sample Date MW-1 MW-4 MW-5 MW-6 LOD SWSL QA/QC
1,2-dichloropropane 04/17/90
MCL = 5 07/11/91
FBAC = 1 (SWSL)05/28/92
NCGQS = 0.6 (2L Std)06/30/93
2L Std = 0.51 (pre- Jan. 2010)11/04/94
2L Std = 0.6 (Jan. 2010)12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/98
04/26/99
11/22/99
05/23/00
11/29/00
06/05/01
11/13/01
06/04/02
03/12/03
06/18/03
12/08/03
06/22/04
11/30/04
06/01/05
11/02/05
05/22/06
11/27/06
06/12/07 0.6 J <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
12/12/07 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
06/17/08 0.7 J <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1 ic, cc
11/05/08 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
05/19/09 0.65 J <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 0.43 J <0.2 0.2 1
11/18/09 0.66 J <0.2 <0.2 <0.2 <0.2 <0.2 0.48 J 0.49 J <0.2 0.2 1
06/21/10 0.63 J <0.098 <0.098 <0.098 <0.098 <0.098 <0.098 <0.098 <0.098 0.098 1
11/18/10 1.1 <0.2 <0.2 <0.2 <0.2 <0.2 0.53 J 0.67 J <0.2 0.2 1
injection event (03-29-11)05/23/11 <0.59 <0.59 <0.59 <0.59 <0.59 <0.59 <0.59 <0.59 <0.59 0.59 1
08/23/11 <0.59 <0.59 <0.59 <0.59 0.59 1
injection event (09-28-11)11/15/11 0.77 J <0.59 <0.59 <0.59 <0.59 <0.59 <0.59 <0.59 <0.59 0.59 1
02/21/12 <0.1 <0.1 0.49 J <0.1 0.1 1
injection event (04-14-12)06/05/12 0.58 J <0.1 <0.1 <0.1 <0.1 <0.1 0.54 J <0.1 <0.1 0.1 1
10/09/12 <0.1 <0.1 <0.1 <0.1 0.1 1
injection event (09-13-12)11/12/12 0.76 J <0.1 <0.1 <0.1 <0.1 <0.1 0.42 J <0.1 <0.1 0.1 1
02/18/13 <0.1 <0.1 0.47 J <0.1 0.1 1
05/13/13 0.55 J <0.1 <0.1 <0.1 <0.1 <0.1 0.64 J 0.53 J <0.1 0.1 1
08/21/13 <0.1 <0.1 0.57 J <0.1 0.1 1
11/11/13 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 0.42 J <0.10 <0.10 0.10 1
02/10/14 <0.10 <0.10 0.52 J <0.10 0.10 1
05/12/14 0.59 J <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 0.44 J <0.10 0.10 1
08/18/14 <0.10 <0.10 0.55 J <0.10 0.10 1
11/11/14 0.66 J <0.10 <0.10 <0.10 <0.10 <0.10 0.49 J <0.10 <0.10 0.10 1
02/23/15 <0.10 <0.10 <0.10 <0.10 0.10 1
05/12/15 0.54 J <0.10 <0.10 <0.10 <0.10 <0.10 0.45 J 0.45 J <0.10 0.10 1
08/24/15 <0.10 <0.10 0.44 J <0.10 0.10 1
11/10/15 0.57 J <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 0.51 J <0.10 0.10 1
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
Constituent Sample Date MW-15
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
MW-23 MW-24 LOD SWSL QA/QCMW-16 MW-17 MW-20 MW-21d MW-21s MW-22
heptachlor epoxide 04/17/90
MCL = 0.2 07/11/91
FBAC = 0.075 (SWSL)05/28/92
NCGQS = 0.004 (2L Std)06/30/93
2L Std = 0.0038 (pre- Jan. 2010)11/04/94
2L Std = 0.004 (Jan. 2010)12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/98
04/26/99
11/22/99
05/23/00
11/29/00
06/05/01
11/13/01
06/04/02
03/12/03
06/18/03
12/08/03
06/22/04
11/30/04
06/01/05
11/02/05
05/22/06
11/27/06
06/12/07 <0.01 <0.01 0.01 0.075
12/12/07
06/17/08 <0.01 <0.01 0.01 0.075
11/05/08
05/19/09 <0.025 <0.025 <0.025 0.025 0.075
11/18/09
06/21/10 <0.0089 <0.0089 <0.0089 0.0089 0.075
11/18/10
injection event (03-29-11)05/23/11 <0.0089 <0.0089 <0.0089 0.0089 0.075
08/23/11
injection event (09-28-11)11/15/11
02/21/12
injection event (04-14-12)06/05/12 <0.037 <0.037 <0.037 0.037 0.075
10/09/12
injection event (09-13-12)11/12/12
02/18/13
05/13/13 <0.037 <0.037 <0.037 0.037 0.075
08/21/13
11/11/13
02/10/14
05/12/14 <0.037 <0.037 <0.037 0.037 0.075
08/18/14
11/11/14
02/23/15
05/12/15 <0.037 <0.037 <0.037 0.037 0.075
08/24/15
11/10/15
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
Constituent Sample Date MW-1 MW-4 MW-5 MW-6
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
LOD SWSL QA/QCMW-6R MW-7 MW-7R MW-13 MW-14A MW-14B
heptachlor epoxide04/17/90
MCL = 0.2 07/11/91
FBAC = 0.075 (SWSL)05/28/92
NCGQS = 0.004 (2L Std)06/30/93
2L Std = 0.0038 (pre- Jan. 2010)11/04/94
2L Std = 0.004 (Jan. 2010)12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/98
04/26/99
11/22/99
05/23/00
11/29/00
06/05/01
11/13/01
06/04/02
03/12/03
06/18/03
12/08/03
06/22/04
11/30/04
06/01/05
11/02/05
05/22/06
11/27/06
06/12/07 <0.01 0.02 J 0.01 0.075
12/12/07
06/17/08 <0.01 <0.01
11/05/08
05/19/09 <0.025 <0.025 <0.025 <0.025 0.025 0.075
11/18/09
06/21/10 <0.0089 <0.0089 <0.0089 <0.0089 0.0089 0.075
11/18/10
injection event (03-29-11)05/23/11 <0.0089 <0.0089 <0.0089 <0.0089 0.0089 0.075
08/23/11
injection event (09-28-11)11/15/11
02/21/12
injection event (04-14-12)06/05/12 <0.037 <0.037 <0.037 <0.037 0.037 0.075
10/09/12
injection event (09-13-12)11/12/12
02/18/13
05/13/13 <0.037 <0.037 <0.037 <0.037 <0.037 <0.037 0.037 0.075
08/21/13
11/11/13
02/10/14
05/12/14 <0.037 <0.037 <0.037 <0.037 <0.037 <0.037 0.037 0.075
08/18/14
11/11/14
02/23/15
05/12/15 <0.037 <0.037 <0.037 <0.037 <0.037 <0.037 0.037 0.075
08/24/15
11/10/15
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW-23 MW-24 LOD SWSL QA/QCMW-16 MW-17 MW-20 MW-21d MW-21s MW-22ConstituentSample Date MW-15
isobutyl alcohol 04/17/90
MCL = 07/11/91
FBAC =100(SWSL)05/28/92
NCGQS = NE 06/30/93
11/04/94
12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97 <100 <100 <100 <100 <100 <100
09/03/97
05/04/98 <100 <100 <100 <100 <100 <100
11/02/98 <100 <100 <100 <100 <100
04/26/99 <100 <100 <100 <100
11/22/99 <100 <100 <100 <100 <100
05/23/00 <100 <100 <100 <100 <100 <100 <100 <100
11/29/00 <100 <100 <100 <100 <100
06/05/01 <100 <100 <100 <100 <100 <100 <100
11/13/01
06/04/02 <100 <100
03/12/03 <100 <100
06/18/03 <100 <100
12/08/03 <100 <100
06/22/04 <100 <100
11/30/04 <100 <100
06/01/05 <100 <100
11/02/05 <100 <100
05/22/06 <100 <100
11/27/06
06/12/07 <1.2 <1.2 1.2 100
12/12/07
06/17/08 <1.2 <1.2 1.2 100 ic, cc
11/05/08
05/19/09 <14 <14 <14 14 100
11/18/09
06/21/10 <14 <14 <14 14 100
11/18/10
injection event (03-29-11)05/23/11 <11 <11 <11 11 100
08/23/11
injection event (09-28-11)11/15/11
02/21/12
injection event (04-14-12)06/05/12 <11 <11 <11 11 100
10/09/12
injection event (09-13-12)11/12/12
02/18/13
05/13/13 <11 <11 <11 11 100
08/21/13
11/11/13
02/10/14
05/12/14 <11 <11 <11 11 100
08/18/14
11/11/14
02/23/15
05/12/15 <11 <11 <11 11 100
08/24/15
11/10/15
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW-6R MW-7 MW-7R MW-13 MW-14A MW-14B
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
Constituent Sample Date MW-1 MW-4 MW-5 MW-6 LOD SWSL QA/QC
isobutyl alcohol 04/17/90
MCL = 07/11/91
FBAC =100(SWSL)05/28/92
NCGQS = NE 06/30/93
11/04/94
12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97 <100 <100 <100 <100
09/03/97
05/04/98 <100 <100 <100 241 R
11/02/98 <100 <100 <100 <100
04/26/99 <100 <100 <100 <100
11/22/99 <100 <100 <100 <100
05/23/00 <100 <100 <100 <100 <100 <100 <100
11/29/00 <100 <100 <100 <100 <100 <100 <100
06/05/01 <100 <100 <100 <100 <100 <100 <100
11/13/01
06/04/02 <100 <100
03/12/03 <100 <100
06/18/03 <100 <100
12/08/03 <100 <100
06/22/04 <100 <100
11/30/04 <100 <100
06/01/05 <100 <100
11/02/05 <100 <100
05/22/06 <100 <100
11/27/06
06/12/07 <1.2 <1.2 1.2 100
12/12/07
06/17/08 <1.2 <1.2 ic, cc
11/05/08
05/19/09 <14 <14 <14 <14 14 100
11/18/09
06/21/10 <14 <14 <14 <14 14 100
11/18/10
injection event (03-29-11)05/23/11 <11 <11 <11 <11 11 100
08/23/11
injection event (09-28-11)11/15/11
02/21/12
injection event (04-14-12)06/05/12 <11 <11 <11 <11 11 100
10/09/12
injection event (09-13-12)11/12/12
02/18/13
05/13/13 <11 <11 <11 <11 <11 <11 11 100
08/21/13
11/11/13
02/10/14
05/12/14 <11 <11 <11 <11 <11 <11 11 100
08/18/14
11/11/14
02/23/15
05/12/15 <11 <11 <11 <11 <11 <11 11 100
08/24/15
11/10/15
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
Constituent Sample Date MW-15
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
MW-23 MW-24 LOD SWSL QA/QCMW-16 MW-17 MW-20 MW-21d MW-21s MW-22
naphthalene 04/17/90
MCL = 07/11/91
FBAC =10(SWSL)05/28/92
NCGQS = 6 (2L Std)06/30/93
11/04/94
12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/98
04/26/99
11/22/99
05/23/00
11/29/00
06/05/01
11/13/01
06/04/02
03/12/03
06/18/03
12/08/03
06/22/04
11/30/04
06/01/05
11/02/05
05/22/06
11/27/06
06/12/07
12/12/07
06/17/08
11/05/08
05/19/09
11/18/09
06/21/10 <0.086 <0.086 <0.086 0.086 10
11/18/10 <0.39 <0.39 <0.39 0.39 10
injection event (03-29-11)05/23/11 <0.46 <0.46 <0.46 0.46 10
08/23/11 0.46 10
injection event (09-28-11)11/15/11 <0.46 <0.46 <0.46 <0.46 <0.46 0.46 10
02/21/12 0.11 10
injection event (04-14-12)06/05/12 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 10
10/09/12 0.11 10
injection event (09-13-12)11/12/12 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 10
02/18/13 0.11 10
05/13/13 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 10
08/21/13
11/11/13 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 10
02/10/14
05/12/14 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 10
08/18/14
11/11/14 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 10
02/23/15
05/12/15 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 10
08/24/15
11/10/15 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 10
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
Constituent Sample Date MW-1 MW-4 MW-5 MW-6
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
LOD SWSL QA/QCMW-6R MW-7 MW-7R MW-13 MW-14A MW-14B
naphthalene 04/17/90
MCL = 07/11/91
FBAC =10(SWSL)05/28/92
NCGQS = 6 (2L Std)06/30/93
11/04/94
12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/98
04/26/99
11/22/99
05/23/00
11/29/00
06/05/01
11/13/01
06/04/02
03/12/03
06/18/03
12/08/03
06/22/04
11/30/04
06/01/05
11/02/05
05/22/06
11/27/06
06/12/07
12/12/07
06/17/08 ic, cc
11/05/08
05/19/09
11/18/09
06/21/10 <0.086 1.9 J <0.086 <0.086 0.086 10
11/18/10 <0.39 0.9 J <0.39 <0.39 0.39 10
injection event (03-29-11)05/23/11 <0.46 1.1 J <0.46 <0.46 0.46 10
08/23/11 <0.46 <0.46 0.46 10
injection event (09-28-11)11/15/11 <0.46 <0.46 <0.46 <0.46 <0.46 <0.46 <0.46 <0.46 <0.46 0.46 10
02/21/12 <0.11 <0.11 <0.46 <0.46 0.11 10
injection event (04-14-12)06/05/12 <0.11 <0.11 <0.11 1.4 J <0.11 <0.11 <0.11 <0.11 <0.11 0.11 10
10/09/12 <0.11 <0.11 <0.11 <0.11 0.11 10
injection event (09-13-12)11/12/12 <0.11 <0.11 <0.11 1.7 J <0.11 <0.11 <0.11 <0.11 <0.11 0.11 10
02/18/13 <0.11 <0.11 <0.11 <0.11 0.11 10
05/13/13 <0.11 <0.11 <0.11 3.6 J <0.11 <0.11 <0.11 <0.11 <0.11 0.11 10
08/21/13
11/11/13 <0.11 <0.11 <0.11 2.8 J <0.11 <0.11 <0.11 <0.11 <0.11 0.11 10
02/10/14
05/12/14 <0.11 <0.11 <0.11 1.9 J <0.11 <0.11 <0.11 <0.11 <0.11 0.11 10
08/18/14
11/11/14 <0.11 <0.11 <0.11 3.4 J <0.11 <0.11 <0.11 <0.11 <0.11 0.11 10
02/23/15
05/12/15 <0.11 <0.11 <0.11 2.9 J <0.11 <0.11 <0.11 <0.11 <0.11 0.11 10
08/24/15
11/10/15 <0.11 <0.11 <0.11 3.2 J <0.11 <0.11 <0.11 <0.11 <0.11 0.11 10
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW-23 MW-24 LOD SWSL QA/QCMW-16 MW-17 MW-20 MW-21d MW-21s MW-22ConstituentSample Date MW-15
tetrachloroethene 04/17/90 <5.0 <5.0 <5.0 <5.0 <5.0
MCL = 5 07/11/91 <5.0 <5.0 <5.0 <5.0 <5.0
FBAC = 1 (SWSL)05/28/92 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
NCGQS = 0.7 (2L Std)06/30/93 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/04/94 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
12/20/94 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
02/02/95 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
03/13/95 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/15/95 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
07/25/96 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
02/25/97 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
09/03/97 <5.0 <5.0 <5.0 <5.0 <5.0
05/04/98 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/02/98 <5.0 <5.0 <5.0 <5.0 <5.0
04/26/99 <5.0 <5.0 <5.0 <5.0 <5.0
11/22/99 <5.0 <5.0 <5.0 <5.0 <5.0
05/23/00 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 t
11/29/00 <5.0 <5.0 <5.0 <5.0 <5.0
06/05/01 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/13/01 <5.0 <5.0 <5.0
06/04/02 <5.0 <5.0 <5.0
03/12/03 <5.0 <5.0 <5.0 <5.0
06/18/03 <5.0 <5.0 <5.0 <5.0 <5.0
12/08/03 <5.0 <5.0 <5.0
06/22/04 <5.0 <5.0 <5.0
11/30/04 <5.0 <5.0 <5.0
06/01/05 <5.0 <5.0 <5.0
11/02/05 <5.0 <5.0 <5.0
05/22/06 <5.0 <5.0 <5.0
11/27/06 <5.0 <5.0 <5.0
06/12/07 <0.2 <0.2 <0.2 <0.2 0.2 1
12/12/07 <0.2 <0.2 <0.2 <0.2 0.2 1
06/17/08 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 0.2 1 ic, cc
11/05/08 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 0.2 1
05/19/09 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 0.36 1
11/18/09 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 0.36 1
06/21/10 <0.099 <0.099 <0.099 <0.099 <0.099 <0.099 0.099 1
11/18/10 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 0.36 1
injection event (03-29-11)05/23/11 <0.73 <0.73 <0.73 <0.73 <0.73 <0.73 0.73 1
08/23/11 0.73 1
injection event (09-28-11)11/15/11 <0.73 <0.73 <0.73 <0.73 <0.73 0.73 1
02/21/12 0.17 1
injection event (04-14-12)06/05/12 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 1
10/09/12 0.17 1
injection event (09-13-12)11/12/12 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 1
02/18/13 0.17 1
05/13/13 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 1
08/21/13 0.17 1
11/11/13 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 1
02/10/14 0.17 1
05/12/14 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 1
08/18/14 0.17 1
11/11/14 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 1
02/23/15 0.17 1
05/12/15 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 1
08/24/15 0.17 1
11/10/15 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 1
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW-6R MW-7 MW-7R MW-13 MW-14A MW-14B
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
Constituent Sample Date MW-1 MW-4 MW-5 MW-6 LOD SWSL QA/QC
tetrachloroethene 04/17/90 <5.0 <5.0
MCL = 5 07/11/91 <5.0 <5.0
FBAC = 1 (SWSL)05/28/92 33 <5.0 <5.0
NCGQS = 0.7 (2L Std)06/30/93 22.9 <5.0 <5.0
11/04/94 15 <5.0 <5.0 <5.0
12/20/94 <5.0 <5.0 <5.0 <5.0
02/02/95 13 <5.0 <5.0 <5.0
03/13/95 12 <5.0 <5.0 <5.0
11/15/95 13 <5.0 <5.0 <5.0
07/25/96 30 <5.0 <5.0 <5.0
02/25/97 23 <5.0 <5.0 <5.0
09/03/97 23 <5.0 <5.0 <5.0
05/04/98 9 <5.0 <5.0 <5.0
11/02/98 10 <5.0 <5.0 <5.0
04/26/99 <5.0 <5.0 <5.0 <5.0
11/22/99 <5.0 <5.0 <5.0 <5.0
05/23/00 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 t
11/29/00 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
06/05/01 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/13/01 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
06/04/02 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
03/12/03 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
06/18/03 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
12/08/03 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
06/22/04 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/30/04 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
06/01/05 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/02/05 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
05/22/06 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/27/06 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
06/12/07 <0.2 <0.2 <0.2 <0.2 0.7 J 0.6 J <0.2 3.2 0.2 1
12/12/07 <0.2 <0.2 <0.2 <0.2 0.5 J 0.2 J <0.2 1.3 0.2 1
06/17/08 <0.2 <0.2 <0.2 <0.2 0.7 J 0.5 J <0.2 2.8 J <0.2 0.2 1 ic, cc
11/05/08 <0.2 <0.2 <0.2 <0.2 0.2 J <0.2 <0.2 1.1 0.3 J 0.2 1
05/19/09 <0.36 <0.36 <0.36 <0.36 0.7 J <0.36 <0.36 3.7 1.3 0.36 1
11/18/09 <0.36 <0.36 <0.36 <0.36 0.68 J 0.54 J <0.36 3.8 0.83 J 0.36 1
06/21/10 <0.099 <0.099 <0.099 <0.099 0.54 J 0.42 J <0.099 2.5 0.53 J 0.099 1
11/18/10 <0.36 <0.36 <0.36 <0.36 0.77 J 0.44 J <0.36 3.2 <0.36 0.36 1
injection event (03-29-11)05/23/11 <0.73 <0.73 <0.73 <0.73 0.77 J <0.73 <0.73 4.4 <0.73 0.73 1
08/23/11 <0.73 <0.73 2.9 <0.73 0.73 1
injection event (09-28-11)11/15/11 <0.73 <0.73 <0.73 <0.73 <0.73 <0.73 <0.73 2.3 <0.73 0.73 1
02/21/12 0.61 J 0.65 J 2.7 <0.17 0.17 1
injection event (04-14-12)06/05/12 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 0.73 J <0.17 0.17 1
10/09/12 <0.17 <0.17 2.4 0.42 J 0.17 1
injection event (09-13-12)11/12/12 <0.17 <0.17 <0.17 <0.17 0.44 J <0.17 <0.17 1.5 <0.17 0.17 1
02/18/13 0.59 J <0.17 2.2 <0.17 0.17 1
05/13/13 <0.17 <0.17 <0.17 <0.17 0.44 J <0.17 <0.17 1.6 <0.17 0.17 1
08/21/13 <0.17 0.44 J 1.7 0.76 J 0.17 1
11/11/13 <0.17 <0.17 <0.17 <0.17 0.41 J <0.17 <0.17 1.4 0.40 J 0.17 1
02/10/14 0.47 J <0.17 1.6 <0.17 0.17 1
05/12/14 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 1.5 <0.17 0.17 1
08/18/14 <0.17 <0.17 0.66 J <0.17 0.17 1
11/11/14 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 1.1 <0.17 0.17 1
02/23/15 <0.17 <0.17 1.1 <0.17 0.17 1
05/12/15 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 0.77 J <0.17 0.17 1
08/24/15 <0.17 0.43 J 1.0 <0.17 0.17 1
11/10/15 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 0.99 J <0.17 0.17 1
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
Constituent Sample Date MW-15
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
MW-23 MW-24 LOD SWSL QA/QCMW-16 MW-17 MW-20 MW-21d MW-21s MW-22
toluene 04/17/90
MCL = 1000 07/11/91
FBAC = 1 (SWSL)05/28/92 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5
NCGQS = 600 (2L Std)06/30/93 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
2L Std = 1000 (pre- Jan. 2010)11/04/94 <5.0 <5.0 <5.0 <5.0 <5.0
2L Std = 600 (Jan. 2010)12/20/94 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
02/02/95 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
03/13/95 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/15/95 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
07/25/96 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
02/25/97 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
09/03/97 <5.0 <5.0 <5.0 <5.0 <5.0
05/04/98 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/02/98 <5.0 <5.0 <5.0 <5.0 <5.0
04/26/99 <5.0 <5.0 <5.0 <5.0 <5.0
11/22/99 <5.0 <5.0 <5.0 <5.0 <5.0
05/23/00 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 9 R
11/29/00 <5.0 <5.0 <5.0 <5.0 <5.0
06/05/01 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/13/01 <5.0 <5.0 <5.0
06/04/02 <5.0 <5.0 <5.0
03/12/03 <5.0 <5.0 <5.0 <5.0
06/18/03 <5.0 <5.0 <5.0 <5.0 <5.0
12/08/03 <5.0 <5.0 <5.0
06/22/04 <5.0 <5.0 <5.0
11/30/04 <5.0 <5.0 <5.0
06/01/05 <5.0 <5.0 <5.0
11/02/05 <5.0 <5.0 <5.0
05/22/06 <5.0 <5.0 <5.0
11/27/06 <5.0 <5.0 <5.0
06/12/07 <0.3 <0.3 <0.3 <0.3 0.3 1
12/12/07 <0.3 <0.3 <0.3 0.4 J 0.3 1
06/17/08 <0.3 0.4 J <0.3 <0.3 <0.3 <0.3 0.3 1 ic, cc
11/05/08 <0.3 0.4 J <0.3 <0.3 <0.3 1 J 0.3 1
05/19/09 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 0.27 1
11/18/09 <0.27 <0.27 <0.27 <0.27 <0.27 0.47 J 0.27 1
06/21/10 <0.053 <0.053 <0.053 <0.053 <0.053 <0.053 0.053 1
11/18/10 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 0.27 1
injection event (03-29-11)05/23/11 <0.85 <0.85 <0.85 <0.85 <0.85 <0.85 0.85 1
08/23/11 0.85 1
injection event (09-28-11)11/15/11 <0.85 <0.85 <0.85 <0.85 <0.85 0.85 1
02/21/12 0.14 1
injection event (04-14-12)06/05/12 <0.14 <0.14 <0.14 <0.14 0.49 J 0.14 1
10/09/12 0.14 1
injection event (09-13-12)11/12/12 <0.14 <0.14 <0.14 <0.14 0.46 J 0.14 1
02/18/13 0.14 1
05/13/13 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 1
08/21/13 0.14 1
11/11/13 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 1
02/10/14 0.14 1
05/12/14 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 1
08/18/14 0.14 1
11/11/14 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 1
02/23/15 0.14 1
05/12/15 <0.14 <0.14 <0.14 <0.14 0.42 J 0.14 1
08/24/15 0.14 1
11/10/15 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 1
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
Constituent Sample Date MW-1 MW-4 MW-5 MW-6
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
LOD SWSL QA/QCMW-6R MW-7 MW-7R MW-13 MW-14A MW-14B
toluene 04/17/90
MCL = 1000 07/11/91
FBAC = 1 (SWSL)05/28/92 <0.5 <0.5 <0.5
NCGQS = 600 (2L Std)06/30/93 <10.0 <10.0 <10.0
2L Std = 1000 (pre- Jan. 2010)11/04/94 <5.0 <5.0 <5.0 <5.0
2L Std = 600 (Jan. 2010)12/20/94 <5.0 <5.0 <5.0 <5.0
02/02/95 <5.0 <5.0 <5.0 <5.0
03/13/95 <5.0 <5.0 <5.0 <5.0
11/15/95 <5.0 <5.0 <5.0 <5.0
07/25/96 <5.0 <5.0 <5.0 <5.0
02/25/97 <5.0 <5.0 <5.0 <5.0
09/03/97 <5.0 <5.0 <5.0 <5.0
05/04/98 <5.0 <5.0 <5.0 <5.0
11/02/98 <5.0 <5.0 <5.0 <5.0
04/26/99 <5.0 <5.0 <5.0 <5.0
11/22/99 <5.0 <5.0 <5.0 <5.0
05/23/00 <5.0 <5.0 <5.0 <5.0 8 R 6 R <5
11/29/00 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
06/05/01 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/13/01 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
06/04/02 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
03/12/03 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
06/18/03 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
12/08/03 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
06/22/04 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/30/04 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
06/01/05 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/02/05 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
05/22/06 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/27/06 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
06/12/07 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 0.3 1
12/12/07 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 0.3 1
06/17/08 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 0.5 J 0.3 1 ic, cc
11/05/08 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 0.4 J <0.3 <0.3 0.3 1
05/19/09 <0.27 <0.27 <0.27 0.55 J <0.27 <0.27 <0.27 <0.27 <0.27 0.27 1
11/18/09 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 0.27 1
06/21/10 <0.053 <0.053 <0.053 <0.053 <0.053 <0.053 <0.053 <0.053 <0.053 0.053 1
11/18/10 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 0.27 1
injection event (03-29-11)05/23/11 <0.85 <0.85 <0.85 <0.85 <0.85 <0.85 <0.85 <0.85 <0.85 0.85 1
08/23/11 <0.85 <0.85 <0.85 <0.85 0.85 1
injection event (09-28-11)11/15/11 <0.85 <0.85 <0.85 <0.85 <0.85 <0.85 <0.85 <0.85 <0.85 0.85 1
02/21/12 <0.14 <0.14 <0.14 <0.14 0.14 1
injection event (04-14-12)06/05/12 0.54 J <0.14 <0.14 0.49 J <0.14 <0.14 <0.14 <0.14 <0.14 0.14 1
10/09/12 <0.14 <0.14 <0.14 <0.14 0.14 1
injection event (09-13-12)11/12/12 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 1
02/18/13 <0.14 <0.14 <0.14 <0.14 0.14 1
05/13/13 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 1
08/21/13 <0.14 <0.14 <0.14 <0.14 0.14 1
11/11/13 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 1
02/10/14 <0.14 <0.14 <0.14 <0.14 0.14 1
05/12/14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 1
08/18/14 <0.14 <0.14 <0.14 <0.14 0.14 1
11/11/14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 1
02/23/15 <0.14 <0.14 <0.14 <0.14 0.14 1
05/12/15 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 1
08/24/15 <0.14 <0.14 <0.14 <0.14 0.14 1
11/10/15 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 1
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW-23 MW-24 LOD SWSL QA/QCMW-16 MW-17 MW-20 MW-21d MW-21s MW-22ConstituentSample Date MW-15
1,1,1-trichloroethane 04/17/90 <5.0 <5.0 <5.0 <5.0 <5.0
MCL = 200 07/11/91 <5.0 <5.0 <5.0 <5.0 <5.0
FBAC = 1 (SWSL)05/28/92 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
NCGQS = 200 (2L Std)06/30/93 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/04/94 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
12/20/94 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
02/02/95 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
03/13/95 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/15/95 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
07/25/96 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
02/25/97 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
09/03/97 <5.0 <5.0 <5.0 <5.0 <5.0
05/04/98 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/02/98 <5.0 <5.0 <5.0 <5.0 <5.0
04/26/99 <5.0 <5.0 <5.0 <5.0 <5.0
11/22/99 <5.0 <5.0 <5.0 <5.0 <5.0
05/23/00 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/29/00 <5.0 <5.0 <5.0 <5.0 <5.0
06/05/01 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/13/01 <5.0 <5.0 <5.0
06/04/02 <5.0 <5.0 <5.0
03/12/03 <5.0 <5.0 <5.0 <5.0
06/18/03 <5.0 <5.0 <5.0 <5.0 <5.0
12/08/03 <5.0 <5.0 <5.0
06/22/04 <5.0 <5.0 <5.0
11/30/04 <5.0 <5.0 <5.0
06/01/05 <5.0 <5.0 <5.0
11/02/05 <5.0 <5.0 <5.0
05/22/06 <5.0 <5.0 <5.0
11/27/06 <5.0 <5.0 <5.0
06/12/07 <0.1 <0.1 <0.1 <0.1 0.1 1
12/12/07 <0.1 <0.1 <0.1 <0.1 0.1 1
06/17/08 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1 ic, cc
11/05/08 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
05/19/09 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 0.27 1
11/18/09 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 0.27 1
06/21/10 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 1
11/18/10 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 0.27 1
injection event (03-29-11)05/23/11 <0.65 <0.65 <0.65 <0.65 <0.65 <0.65 0.65 1
08/23/11 0.65 1
injection event (09-28-11)11/15/11 <0.65 <0.65 <0.65 <0.65 <0.65 0.65 1
02/21/12 0.12 1
injection event (04-14-12)06/05/12 <0.12 <0.12 <0.12 <0.12 <0.12 0.12 1
10/09/12 0.12 1
injection event (09-13-12)11/12/12 <0.12 <0.12 <0.12 <0.12 <0.12 0.12 1
02/18/13 0.12 1
05/13/13 <0.12 <0.12 <0.12 <0.12 <0.12 0.12 1
08/21/13 0.12 1
11/11/13 <0.12 <0.12 <0.12 <0.12 <0.12 0.12 1
02/10/14 0.12 1
05/12/14 <0.12 <0.12 <0.12 <0.12 <0.12 0.12 1
08/18/14 0.12 1
11/11/14 <0.12 <0.12 <0.12 <0.12 <0.12 0.12 1
02/23/15 0.12 1
05/12/15 <0.12 <0.12 <0.12 <0.12 <0.12 0.12 1
08/24/15 0.12 1
11/10/15 <0.12 <0.12 <0.12 <0.12 <0.12 0.12 1
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW-6R MW-7 MW-7R MW-13 MW-14A MW-14B
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
Constituent Sample Date MW-1 MW-4 MW-5 MW-6 LOD SWSL QA/QC
1,1,1-trichloroethane 04/17/90 <5.0 <5.0
MCL = 200 07/11/91 <5.0 <5.0
FBAC = 1 (SWSL)05/28/92 23 <5.0 <5.0
NCGQS = 200 (2L Std)06/30/93 11.9 <5.0 <5.0
11/04/94 <5.0 <5.0 <5.0 <5.0
12/20/94 <5.0 <5.0 <5.0 <5.0
02/02/95 <5.0 <5.0 <5.0 <5.0
03/13/95 <5.0 <5.0 <5.0 <5.0
11/15/95 <5.0 <5.0 <5.0 <5.0
07/25/96 <5.0 <5.0 <5.0 <5.0
02/25/97 <5.0 <5.0 <5.0 <5.0
09/03/97 <5.0 <5.0 <5.0 <5.0
05/04/98 <5.0 <5.0 <5.0 <5.0
11/02/98 <5.0 <5.0 <5.0 <5.0
04/26/99 <5.0 <5.0 <5.0 <5.0
11/22/99 <5.0 <5.0 <5.0 <5.0
05/23/00 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/29/00 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
06/05/01 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/13/01 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
06/04/02 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
03/12/03 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
06/18/03 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
12/08/03 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
06/22/04 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/30/04 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
06/01/05 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/02/05 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
05/22/06 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/27/06 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
06/12/07 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
12/12/07 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
06/17/08 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1 ic, cc
11/05/08 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
05/19/09 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 0.27 1
11/18/09 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 0.27 1
06/21/10 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 1
11/18/10 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 0.27 1
injection event (03-29-11)05/23/11 <0.65 <0.65 <0.65 <0.65 <0.65 <0.65 <0.65 <0.65 <0.65 0.65 1
08/23/11 <0.65 <0.65 <0.65 <0.65 0.65 1
injection event (09-28-11)11/15/11 <0.65 <0.65 <0.65 <0.65 <0.65 <0.65 <0.65 <0.65 <0.65 0.65 1
02/21/12 <0.12 <0.12 <0.12 <0.12 0.12 1
injection event (04-14-12)06/05/12 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 0.12 1
10/09/12 <0.12 <0.12 <0.12 <0.12 0.12 1
injection event (09-13-12)11/12/12 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 0.12 1
02/18/13 <0.12 <0.12 <0.12 <0.12 0.12 1
05/13/13 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 0.12 1
08/21/13 <0.12 <0.12 <0.12 <0.12 0.12 1
11/11/13 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 0.12 1
02/10/14 <0.12 <0.12 <0.12 <0.12 0.12 1
05/12/14 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 0.12 1
08/18/14 <0.12 <0.12 <0.12 <0.12 0.12 1
11/11/14 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 0.12 1
02/23/15 <0.12 <0.12 <0.12 <0.12 0.12 1
05/12/15 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 0.12 1
08/24/15 <0.12 <0.12 <0.12 <0.12 0.12 1
11/10/15 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 <0.12 0.12 1
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
Constituent Sample Date MW-15
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
MW-23 MW-24 LOD SWSL QA/QCMW-16 MW-17 MW-20 MW-21d MW-21s MW-22
trichloroethene 04/17/90 <5.0 <5.0 <5.0 <5.0 <5.0
MCL = 5 07/11/91 <5.0 <5.0 <5.0 <5.0 <5.0
FBAC = 1 (SWSL)05/28/92 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
NCGQS = 3 (2L Std)06/30/93 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
2L Std = 2.8 (pre- Jan. 2010)11/04/94 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
2L Std = 3 (Jan. 2010)12/20/94 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
02/02/95 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
03/13/95 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/15/95 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
07/25/96 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
02/25/97 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
09/03/97 <5.0 <5.0 <5.0 <5.0 <5.0
05/04/98 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/02/98 <5.0 <5.0 <5.0 <5.0 <5.0
04/26/99 <5.0 <5.0 <5.0 <5.0 <5.0
11/22/99 <5.0 <5.0 <5.0 <5.0 <5.0
05/23/00 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/29/00 <5.0 <5.0 <5.0 <5.0 <5.0
06/05/01 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/13/01 <5.0 <5.0 <5.0 cc
06/04/02 <5.0 <5.0 <5.0
03/12/03 <5.0 <5.0 <5.0 <5.0
06/18/03 <5.0 <5.0 <5.0 <5.0 <5.0
12/08/03 <5.0 <5.0 <5.0
06/22/04 <5.0 <5.0 <5.0
11/30/04 <5.0 <5.0 <5.0
06/01/05 <5.0 <5.0 <5.0
11/02/05 <5.0 <5.0 <5.0
05/22/06 <5.0 <5.0 <5.0
11/27/06 <5.0 <5.0 <5.0
06/12/07 <0.1 <0.1 <0.1 <0.1 0.1 1
12/12/07 <0.1 <0.1 <0.1 <0.1 0.1 1
06/17/08 <0.1 0.4 J <0.1 <0.1 <0.1 <0.1 0.1 1 ic, cc
11/05/08 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
05/19/09 <0.38 <0.38 <0.38 <0.38 <0.38 <0.38 0.38 1
11/18/09 <0.38 <0.38 <0.38 <0.38 <0.38 <0.38 0.38 1
06/21/10 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 0.13 1
11/18/10 <0.38 0.45 J <0.38 <0.38 <0.38 <0.38 0.38 1
injection event (03-29-11)05/23/11 <0.72 <0.72 <0.72 <0.72 <0.72 <0.72 0.72 1
08/23/11 0.72 1
injection event (09-28-11)11/15/11 <0.72 <0.72 <0.72 <0.72 <0.72 0.72 1
02/21/12 0.15 1
injection event (04-14-12)06/05/12 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 1
10/09/12 0.15 1
injection event (09-13-12)11/12/12 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 1
02/18/13 0.15 1
05/13/13 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 1
08/21/13 0.15 1
11/11/13 <0.15 0.49 J <0.15 <0.15 <0.15 0.15 1
02/10/14 0.15 1
05/12/14 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 1
08/18/14 0.15 1
11/11/14 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 1
02/23/15 0.15 1
05/12/15 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 1
08/24/15 0.15 1
11/10/15 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 1
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
Constituent Sample Date MW-1 MW-4 MW-5 MW-6
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
LOD SWSL QA/QCMW-6R MW-7 MW-7R MW-13 MW-14A MW-14B
trichloroethene 04/17/90 <5.0 <5.0
MCL = 5 07/11/91 <5.0 <5.0
FBAC = 1 (SWSL)05/28/92 16 <5.0 <5.0
NCGQS = 3 (2L Std)06/30/93 24.4 <5.0 <5.0
2L Std = 2.8 (pre- Jan. 2010)11/04/94 22 <5.0 <5.0 <5.0
2L Std = 3 (Jan. 2010)12/20/94 9 <5.0 <5.0 <5.0
02/02/95 19 <5.0 <5.0 <5.0
03/13/95 13 <5.0 <5.0 <5.0
11/15/95 14 <5.0 <5.0 <5.0
07/25/96 33 <5.0 <5.0 <5.0
02/25/97 30 <5.0 <5.0 <5.0
09/03/97 31 <5.0 <5.0 <5.0
05/04/98 21 <5.0 <5.0 <5.0
11/02/98 23 <5.0 <5.0 <5.0
04/26/99 12 <5.0 <5.0 <5.0
11/22/99 8 <5.0 <5.0 <5.0
05/23/00 10 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/29/00 6 <5.0 <5.0 <5.0 5 <5.0 <5.0
06/05/01 7 <5.0 <5.0 <5.0 <5.0 5 <5.0
11/13/01 <5.0 <5.0 <5.0 <5.0 <5.0 6 J <5.0 cc
06/04/02 <5.0 5 <5.0 <5.0 <5.0 7 <5.0
03/12/03 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
06/18/03 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
12/08/03 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
06/22/04 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/30/04 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
06/01/05 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/02/05 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
05/22/06 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
11/27/06 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0
06/12/07 <0.1 1.9 <0.1 <0.1 <0.1 <0.1 <0.1 4.2 0.1 1
12/12/07 0.3 J 1.4 <0.1 <0.1 0.8 J 0.9 J <0.1 2.3 0.1 1
06/17/08 <0.1 1.7 J <0.1 <0.1 1.1 J 1.4 J <0.1 3.6 J <0.1 0.1 1 ic, cc
11/05/08 1 J 0.8 J <0.1 <0.1 0.6 J 1 J <0.1 3.4 0.9 J 0.1 1
05/19/09 <0.38 1.1 <0.38 <0.38 0.94 J 1.2 <0.38 3.6 1.3 0.38 1
11/18/09 <0.38 1.2 <0.38 <0.38 0.76 J 1.1 <0.38 4.4 1.1 0.38 1
06/21/10 <0.13 1.1 <0.13 <0.13 0.64 J 0.9 J <0.13 3 0.88 J 0.13 1
11/18/10 <0.38 0.7 J <0.38 <0.38 0.69 J 0.87 J <0.38 3.2 1 0.38 1
injection event (03-29-11)05/23/11 <0.72 0.79 J <0.72 <0.72 <0.72 0.75 J <0.72 4 1.1 0.72 1
08/23/11 <0.72 0.91 J 3 1 0.72 1
injection event (09-28-11)11/15/11 <0.72 <0.72 <0.72 <0.72 <0.72 0.8 J <0.72 2.2 1.1 0.72 1
02/21/12 0.61 J 0.6 J 2.8 0.73 J 0.15 1
injection event (04-14-12)06/05/12 <0.15 0.44 J <0.15 <0.15 0.45 J 0.56 J <0.15 2 0.74 J 0.15 1
10/09/12 <0.15 0.52 J 0.71 J 0.89 J 0.15 1
injection event (09-13-12)11/12/12 <0.15 0.55 J <0.15 <0.15 0.48 J <0.15 <0.15 0.95 J 0.89 J 0.15 1
02/18/13 0.48 J <0.15 2 0.92 J 0.15 1
05/13/13 <0.15 0.58 J <0.15 <0.15 <0.15 <0.15 <0.15 2 0.75 J 0.15 1
08/21/13 0.42 J <0.15 1.3 0.76 J 0.15 1
11/11/13 <0.15 <0.15 <0.15 <0.15 0.46 J <0.15 <0.15 1.7 0.76 J 0.15 1
02/10/14 0.41 J <0.15 1.5 <0.15 0.15 1
05/12/14 <0.15 0.41 J <0.15 <0.15 0.42 J <0.15 <0.15 1.4 0.54 J 0.15 1
08/18/14 0.57 J <0.15 1.4 0.54 J 0.15 1
11/11/14 <0.15 0.55 J <0.15 <0.15 0.49 J <0.15 <0.15 0.97 J 0.42 J 0.15 1
02/23/15 0.41 J <0.15 1.5 0.53 J 0.15 1
05/12/15 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 0.95 J <0.15 0.15 1
08/24/15 0.45 J 0.49 J 0.97 J 0.46 J 0.15 1
11/10/15 <0.15 <0.15 <0.15 <0.15 0.49 J <0.15 <0.15 0.82 J <0.15 0.15 1
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW-16 MW-17 MW-20 MW-21d MW-21s MW-22ConstituentSample Date MW-15 MW-23 MW-24 LOD SWSL QA/QC
vinyl chloride 04/17/90 <10.0 <10.0 <5.0 <5.0 <10.0
MCL = 2 07/11/91 <10.0 <10.0 <5.0 <5.0 <10.0
FBAC = 1 (SWSL)05/28/92 <10.0 <10.0 <5.0 <5.0 <10.0 <10.0 <10.0 <10.0
NCGQS = 0.03 (2L Std)06/30/93 <10.0 <10.0 <5.0 <10.0 <10.0 <10.0 <10.0
2L Std = 0.015 (pre- Jan. 2010)11/04/94 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
2L Std = 0.03 (Jan. 2010)12/20/94 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
02/02/95 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
03/13/95 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
11/15/95 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 is
07/25/96 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 cc
02/25/97 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
09/03/97 <10.0 <10.0 <10.0 <10.0 <10.0
05/04/98 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
11/02/98 <10.0 <10.0 <10.0 <10.0 <10.0
04/26/99 <10.0 <10.0 <10.0 <10.0 <10.0
11/22/99 <10.0 <10.0 <10.0 <10.0 <10.0
05/23/00 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
11/29/00 <10.0 <10.0 <10.0 <10.0 <10.0
06/05/01 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
11/13/01 <10.0 <10.0 <10.0
06/04/02 <10.0 <10.0 <10.0 sr
03/12/03 <10.0 <10.0 <10.0 <10.0 ht
06/18/03 <10.0 <10.0 <10.0 <10.0 <10.0 ic, cc, ss
12/08/03 <10.0 <10.0 <10.0 ic, cc
06/22/04 <10.0 <10.0 <10.0 ic, cc
11/30/04 <10.0 <10.0 <10.0
06/01/05 <10.0 <10.0 <10.0
11/02/05 <10.0 <10.0 <10.0
05/22/06 <10.0 <10.0 <10.0
11/27/06 <10.0 <10.0 <10.0
06/12/07 <0.1 <0.1 1.3 8 0.1 1
12/12/07 <0.1 <0.1 0.3 J 8.2 0.1 1
06/17/08 <0.1 <0.1 <0.1 <0.1 <0.1 6.6 J 0.1 1 ic, cc
11/05/08 <0.1 <0.1 <0.1 <0.1 0.95 J 5.6 0.1 1
05/19/09 <0.3 <0.3 <0.3 <0.3 0.83 J 6.4 0.3 1
11/18/09 <0.3 <0.3 <0.3 <0.3 1 J 10 0.3 1
06/21/10 <0.083 <0.083 <0.083 <0.083 <0.083 6 0.083 1
11/18/10 <0.3 <0.3 <0.3 <0.3 0.51 J 7.1 0.3 1
injection event (03-29-11)05/23/11 <0.6 <0.6 <0.6 <0.6 <0.6 4.7 0.6 1
08/23/11 0.6 1
injection event (09-28-11)11/15/11 <0.6 <0.6 <0.6 <0.6 5.4 0.6 1
02/21/12 0.32 1
injection event (04-14-12)06/05/12 <0.32 <0.32 <0.32 <0.32 2.8 0.32 1
10/09/12 0.32 1
injection event (09-13-12)11/12/12 <0.32 <0.32 <0.32 <0.32 7.5 0.32 1
02/18/13 0.32 1
05/13/13 <0.32 <0.32 <0.32 <0.32 6.7 0.32 1
08/21/13 0.32 1
11/11/13 <0.32 0.88 J <0.32 <0.32 4.3 0.32 1
02/10/14 0.32 1
05/12/14 <0.32 <0.32 <0.32 <0.32 9.0 0.32 1
08/18/14 0.32 1
11/11/14 <0.32 <0.32 <0.32 0.99 J 8.4 0.32 1
02/23/15 0.32 1
05/12/15 <0.32 <0.32 <0.32 <0.32 6.3 0.32 1
08/24/15 0.32 1
11/10/15 <0.32 <0.32 <0.32 0.81 J 6.4 0.32 1
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
LOD SWSL QA/QCMW-6R MW-7 MW-7R MW-13 MW-14A MW-14BConstituentSample Date MW-1 MW-4 MW-5 MW-6
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
vinyl chloride 04/17/90 <10.0 <10.0
MCL = 2 07/11/91 <10.0 <10.0
FBAC = 1 (SWSL)05/28/92 <10.0 <10.0 <10.0
NCGQS = 0.03 (2L Std)06/30/93 <10.0 <10.0 <10.0
2L Std = 0.015 (pre- Jan. 2010)11/04/94 <10.0 <10.0 <10.0 26
2L Std = 0.03 (Jan. 2010)12/20/94 <10.0 <10.0 <10.0 <10.0
02/02/95 <10.0 <10.0 <10.0 20
03/13/95 <10.0 <10.0 <10.0 20
11/15/95 <10.0 <10.0 <10.0 13 J is
07/25/96 <10.0 <10.0 <10.0 43 J cc
02/25/97 <10.0 <10.0 <10.0 11
09/03/97 10 R <10.0 <10.0 15
05/04/98 <10.0 <10.0 <10.0 10
11/02/98 <10.0 <10.0 <10.0 11
04/26/99 <10.0 <10.0 <10.0 <10.0
11/22/99 <10.0 <10.0 <10.0 17
05/23/00 <10.0 <10.0 <10.0 10 <10.0 <10.0 <10.0
11/29/00 <10.0 <10.0 <10.0 12 <10.0 <10.0 <10.0
06/05/01 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
11/13/01 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
06/04/02 10 J <10.0 <10.0 10 J <10.0 <10.0 <10.0 sr
03/12/03 17 J <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 ht
06/18/03 14 J <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 ic, cc, ss
12/08/03 13 J <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 ic, cc
06/22/04 12 J <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 ic, cc
11/30/04 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
06/01/05 16 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
11/02/05 15 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
05/22/06 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
11/27/06 22 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0
06/12/07 13.1 3.9 <0.1 2.4 4 1.2 0.7 J 4 0.1 1
12/12/07 16.5 2.1 <0.1 2 2.4 0.4 J 0.97 J 4.4 0.1 1
06/17/08 12.8 J 4 J <0.1 1.8 J 3.4 J 1 J 0.7 J 2.9 J 0.3 J 0.1 1 ic, cc
11/05/08 14.6 2 <0.1 1.5 3.5 2.5 <0.1 3.4 3.3 0.1 1
05/19/09 12 2.3 <0.3 0.6 J 3.2 2.9 0.78 J 2.7 1.6 0.3 1
11/18/09 12 3.4 <0.3 0.94 J 3.6 2.9 1.6 4.8 2.5 0.3 1
06/21/10 8.7 1.9 <0.083 0.69 J 2.5 1.6 0.7 J 1.6 0.62 J 0.083 1
11/18/10 13 2.3 <0.3 0.79 J 3.8 0.56 J 1.2 4.7 1.9 0.3 1
injection event (03-29-11)05/23/11 8.2 1.1 <0.6 <0.6 2.6 1.2 <0.6 2.4 <0.6 0.6 1
08/23/11 3.3 2.4 3.6 1.1 0.6 1
injection event (09-28-11)11/15/11 10 1.4 <0.6 <0.6 1.7 <0.6 1.2 1.6 1.5 0.6 1
02/21/12 2.9 1 2.6 1 0.32 1
injection event (04-14-12)06/05/12 9.7 <0.32 <0.32 <0.32 <0.32 <0.32 <0.32 <0.32 <0.32 0.32 1
10/09/12 <0.32 0.96 J 1.1 0.32 1
injection event (09-13-12)11/12/12 12 1.2 <0.32 0.62 J 1.2 <0.32 1.4 <0.32 1.6 0.32 1
02/18/13 1.4 <0.32 2 0.32 1
05/13/13 12 1.3 <0.32 <0.32 2.2 <0.32 1.2 0.78 J <0.32 0.32 1
08/21/13 1.3 <0.32 0.72 J 0.54 J 0.32 1
11/11/13 8.8 <0.32 <0.32 <0.32 2.4 <0.32 1.2 1.8 0.41 J 0.32 1
02/10/14 2.5 <0.32 1.4 <0.32 0.32 1
05/12/14 17 1.9 <0.32 0.98 J 3.5 <0.32 2.0 2.9 <0.32 0.32 1
08/18/14 3.4 <0.32 4.4 <0.32 0.32 1
11/11/14 10 0.71 J <0.32 0.44 J 3.3 <0.32 2.0 4.2 <0.32 0.32 1
02/23/15 2.7 <0.32 3.7 <0.32 0.32 1
05/12/15 14 0.56 J <0.32 0.47 J 2.7 <0.32 1.8 3.5 <0.32 0.32 1
08/24/15 1.8 <0.32 3.1 <0.32 0.32 1
11/10/15 13 0.93 J <0.32 <0.32 3.0 <0.32 1.8 4.9 0.62 J 0.32 1
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
QA/QCMW-16 MW-17 MW-20 MW-21d MW-21s MW-22ConstituentSample Date MW-15 MW-23 MW-24 LOD SWSL
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
All results in µg/l.
Upgradient wells not shaded.
Shaded cells indicate data not available.
Blue bolded cells indicate concentrations that exceeded the FBAC.
Red bolded cells indicate concentrations that exceeded the NCGQS.
Green bolded cells indicate concentrations that were >LOD but <SWSL.
i - found in instrument blank t – found in trip blank
f - found in field blank ic - initial calibration beyond limits
cc – continuing calibration beyond limits md - matrix spike duplicates beyond limits
ss – surrogate spikes beyond limits is - internal standard beyond limits
ce - confirmation value beyond limits J - concentration deemed estimated
B – concentration attributed to cross-contamination R - concentration deemed unreliable
sr - sample results of a duplicate are below detection limits ht - sample holding time was exceeded
 - additional Appendix 2 constituent - limits not established
FBAC - facility background NCGQS – groundwater standard, as established by NCDENR
SWSL – Solid Waste Section Limit, as established by NCDENR SPL – statistical prediction limit
GWPS - groundwater protection standard
44northOrg&Inorg.592
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
ATTACHMENT 6

SUMMARY OF INORGANIC CONSTITUENTS

ATTACHMENT 6

INORGANIC CONSTITUENTS

During November 10, and November 11, 2015 (sampling event 44), Sherrill Environmental, Inc.
(Sherrill) personnel obtained groundwater samples from fourteen groundwater monitoring wells at
the Orange County Solid Waste Management North Facility (north side of Eubanks Road).

 During event 44, the laboratory detected seventeen metal constituents, at concentrations
greater than their respective method detection limits (>MDLs): antimony, arsenic, barium,
cadmium, chromium, cobalt, copper, iron (C&D parameter), lead, manganese (C&D
parameter), mercury, nickel, selenium, silver, sulfide, vanadium, zinc.

Groundwater samples to be analyzed for metals were not filtered in the field, such that all
metals were analyzed as total metals.

The laboratory reported manganese in an associated instrument blank (>1.10 µg/l but
<10.0 µg/l).

Since the reported concentrations of manganese in wells 6801-MW04 (4.52 µg/l),
6801-MW21D (13.7 µg/l), 6801-MW21S (21.7 µg/l), and 6801-MW-23 (40.5 µg/l),
are less than 5x the estimated concentration in the associated blank (10.0 µg/l x 5 =
50 µg/l), the reported concentrations in each of those wells may be attributed to cross-
contamination (flagged “B”).

Conversely, since the reported concentration of manganese in well 6801-MW24 (92.1
µg/l) is greater than 5x the estimated concentration in the associated blank (10.0 µg/l
x 5 = 50 µg/l), the reported concentration in that well may be acceptable (with respect
to cross-contamination).

Of the fifteen inorganic constituents “reliably” detected, eight exceeded their respective
Solid Waste Section Limits (>SWSLs, except where calculated): arsenic, barium,
chromium, cobalt, copper, manganese (one well), mercury, zinc.

Of the eight metals that exceeded their respective Solid Waste Section Limits (>SWSLs,
except where calculated), four metals also exceeded their respective Groundwater Quality
Standard:

 The reported concentrations of chromium in wells 6801-MW21S (94.1 µg/l) and 6801-
MW23 (57.7 µg/l) exceeded its Facility Background Concentration (=SWSL) and its
Groundwater Quality Standard (10 µg/l; 2L Standard).

Inorganic Constituents
Page 2

 The reported concentrations of cobalt in wells 6801-MW14A (43.9 µg/l), 6801-
MW14B (30.8 µg/l), 6801-MW15 (27.3 µg/l), and 6801-MW20 (15.7 µg/l) exceeded its
Facility Background Concentration (=SWSL) and its Groundwater Quality Standard
(1 µg/l; GWPS).

 The reported concentration of manganese in well 6801-MW24 (92.1 µg/l) exceeded
its Facility Background Concentration (=SWSL) and its Groundwater Quality
Standard (50 µg/l; 2L Standard).

We attribute the reported exceedance of manganese to the injection of potassium
permanganate in that area of the facility, in connection with the groundwater corrective
action program at the North Facility.

 The reported concentrations of mercury in wells 6801-MW21S (2.21 µg/l), 6801-
MW21D (1.32 µg/l), and 6801-MW23 (3.67 µg/l) exceeded its Facility Background
Concentration (=SWSL) and its Groundwater Quality Standard (1 µg/l; 2L Standard).

15A NCAC 13B.1634.(f) states, “If one or more Appendix II constituents are detected
above the approved ground-water protection standards in any sampling event, the owner or
operator, shall within 14 days of this finding, submit a report to the Division, place a notice
in the operating record, and notify local government officials.”

Comment. Orange County Solid Waste Management has already characterized the nature and
extent of constituents that previously exceeded their respective Groundwater Quality Standards, and
prepared an Assessment of Corrective Measures, Corrective Action Plan, and Corrective Action
Monitoring Plan addressing such constituents (all of which were previously submitted to NCDENR
for review and approval).

Injection reports for areas where permanganate or HRC injections are performed will be
submitted (under separate cover), in accordance with the injection permit that was issued for the
facility by the NCDENR Underground Injection Control Section.
METALS

GRAPHS

0
20
40
60
80
100
120
140
co
n
c
e
n
t
r
a
t
i
o
n

(
p
p
b
)
date sampled
OCSWM North -chromium (MW-21S + MW-21D)
MW-21S MW-21D
injection event 1: 03-29-11
GWQS = 10 ppb
injection event 4: 09-13-12
0
20
40
60
80
100
120
140
co
n
c
e
n
t
r
a
t
i
o
n

(
p
p
b
)
date sampled
OCSWM North -chromium (MW-23 + MW-24)
MW-23 MW-24
injection event 1: 03-29-11
GWQS = 10 ppbinjection event 4: 09-13-12
0
1
2
3
4
5
6
7
8
9
co
n
c
e
n
t
r
a
t
i
o
n

(
p
p
b
)
date sampled
OCSWM North -mercury (MW-21S + MW-21D)
MW-21S MW-21D
injection event 1: 03-29-11
GWQS = 1 ppb
injection event 4: 09-13-12
0.00
0.50
1.00
1.50
2.00
2.50
3.00
3.50
4.00
4.50
co
n
c
e
n
t
r
a
t
i
o
n

(
p
p
b
)
date sampled
OCSWM North -mercury (MW-24 + MW-25)
MW-23 MW-24
injection event 1: 03-29-11
GWQS = 1 ppb
injection event 4: 09-13-12
TABLES

antimony 04/17/90
MCL = 6 07/11/91
FBAC = 6 (SWSL)05/28/92
NCGQS = 1 (GWPS)06/30/93
GWPS = 1.4 (pre-Oct. 2010)11/04/94
GWPS = 1 (Oct. 2010)12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/98
04/26/99
11/22/99
05/23/00
11/29/00
06/05/01
11/13/01
06/04/02
03/12/03
06/18/03
12/08/03
06/22/04
11/30/04
06/01/05
11/02/05
05/22/06
11/27/06
06/12/07
12/12/07 <1.2 1.2 JB 1.2 JB 1.2 6 i
03/06/08 1.8 J 1.2 6
06/12/08 <1.2 <1.2 <1.2 <1.2 1.7 JB <1.2 1.2 6 i
11/05/08 <1.2 <1.2 <1.2 1.5 J <1.2 <1.2 1.2 6
05/19/09 <0.68 <0.68 <0.68 <0.68 <0.68 <0.68 0.68 6
11/18/09 <0.073 <0.073 0.126 J <0.073 <0.073 <0.073 0.073 6
06/21/10 <0.22 0.352 J <0.22 <0.22 <0.22 <0.22 0.22 6
11/18/10 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 0.22 6
05/23/11 <0.22 0.37 J <0.22 <0.22 <0.22 <0.22 0.22 6
11/15/11 <0.22 <0.22 <0.22 <0.22 <0.22 0.22 6 i
06/05/12 1 JB 0.691 JB <0.22 <0.22 <0.22 0.22 6 i
11/12/12 <0.22 <0.22 <0.22 <0.22 <0.22 0.22 6 i
05/13/13 0.32 J <0.22 <0.22 <0.22 <0.22 0.22 6
11/11/13 <0.220 <0.220 <0.220 <0.220 <0.220 0.220 6
05/12/14 <0.220 0.335 J <0.220 <0.220 <0.220 0.220 6
11/11/14 0.603 J <0.220 <0.220 <0.220 <0.220 0.220 6
02/23/15
05/12/15 0.780 J <0.220 <0.220 0.239 J <0.220 0.220 6
08/24/15
11/10/15 0.237 J 1.05 J 0.548 J 0.303 J <0.220 0.220 6
Constituent Sample Date MW-1 MW-4 MW-5 MW-6 MW-7 MW-7R MW-13 MW-14A MW-14B LOD SWSL QA/QC
INORGANIC CONSTITUENTS: TOTAL METALS
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW-6R
antimony 04/17/90
MCL = 6 07/11/91
FBAC = 6 (SWSL)05/28/92
NCGQS = 1 (GWPS)06/30/93
GWPS = 1.4 (pre-Oct. 2010)11/04/94 cc,i,ms
GWPS = 1 (Oct. 2010)12/20/94 i
02/02/95
03/13/95 ms
11/15/95 ms
07/25/96 i,f,ms
02/25/97 i
09/03/97
05/04/98 i
11/02/98 i
04/26/99
11/22/99 q
05/23/00 q
11/29/00 q
06/05/01
11/13/01 ms
06/04/02
03/12/03
06/18/03
12/03/03
06/22/04
11/30/04
06/01/05
11/02/05
05/22/06
11/27/06
06/12/07
12/12/07 <1.2 <1.2 <1.2 1.3 JB <1.2 <1.2 <1.2 1.2 6 i
03/06/08 1.2 6
06/12/08 4 JB <1.2 <1.2 1.8 JB <1.2 2.2 JB <1.2 1.4 JB 1.9 JB 1.2 6 i
11/05/08 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 6
05/19/09 <0.68 <0.68 <0.68 <0.68 <0.68 <0.68 <0.68 <0.68 <0.68 0.68 6
11/18/09 <0.073 <0.073 <0.073 <0.073 <0.073 0.089 J <0.073 <0.073 0.337 J 0.073 6
06/21/10 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 0.22 6
11/18/10 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 0.22 6
05/23/11 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 0.22 6
11/15/11 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 0.22 6 i
06/05/12 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 0.22 6 i
11/12/12 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 0.642 J <0.22 0.22 6 i
05/13/13 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 0.22 6
11/11/13 <0.220 <0.220 <0.220 <0.220 <0.220 <0.220 <0.220 <0.220 <0.220 0.220 6
05/12/14 <0.220 <0.220 <0.220 <0.220 <0.220 <0.220 <0.220 <0.220 <0.220 0.220 6
11/11/14 <0.220 <0.220 <0.220 <0.220 <0.220 <0.220 <0.220 <0.220 <0.220 0.220 6
02/23/15
05/12/15 <0.220 <0.220 <0.220 <0.220 <0.220 <0.220 <0.220 <0.220 <0.220 0.220 6
08/24/15
11/10/15 <0.220 <0.220 <0.220 <0.220 <0.220 <0.220 <0.220 <0.220 <0.220 0.220 6
MW-20 MW-21D MW-21S MW-22 MW-23 LOD
INORGANIC CONSTITUENTS: TOTAL METALS
SWSLConstituentSample Date MW-15 MW-24 QA/QCMW-16 MW-17
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
arsenic 04/17/90 <10 <10 <10 <10 <10
MCL = 10 07/11/91 <10 <10 <10 <10 <10
FBAC = 10 (SWSL)05/28/92 <10 <10 <10 <10 <10 <10 <10 <10
NCGQS = 10 (2L Std)06/30/93 <10 <10 <10 <10 <10 <10 <10
2L Std = 50 (pre- Jan. 2010)11/04/94 <10 <10 <10 15 B 11 B 16 B cc,i,ms
2L Std = 10 (Jan. 2010)12/20/94 <10 <10 <10 12 B <10 13 B i
02/02/95 <10 <10 <10 <10 <10 <10
03/13/95 <10 <10 <10 <10 <10 <10 <10 11 J ms
11/15/95 <10 <10 <10 <10 <10 <10 <10 17 J ms
07/25/96 <10 <10 <10 <10 <10 12 J i,f,ms
02/25/97 <10 <10 <10 <10 <10 <10 <10 <10 i
09/03/97 <10 <10 21 <10 14
05/04/98 <10 <10 <10 <10 <10 <10 <10 <10 i
11/02/98 <10 <10 45 <10 11 B i
04/26/99 <10 <10 <10 <10 <10
11/22/99 <10 <10 <10 <10 11 J q
05/23/00 <10 <10 20 J <10 <10 <10 <10 <10 q
11/29/00 <10 <10 21 J <10 <10 q
06/05/01 <10 <10 20 <10 15 <10 <10
11/13/01 <10 <10 <10 ms
06/04/02 <10 <10 <10
03/12/03 <10 <10 <10 <10
06/18/03 <10 <10 <10 <10 <10
12/08/03 <10 <10 <10
06/22/04 <10 <10 16
11/30/04 <10 <10 13
06/01/05 <10 <10 <10
11/02/05 <10 <10 <10
05/22/06 <10 <10 <10
11/27/06 <10 <10 <10
06/12/07 <5.5 <5.5 <5.5 <5.5 5.5 10
12/12/07 <5.5 <5.5 <5.5 5.5 10
03/06/08 <5.5 5.5 10
06/12/08 <5.5 <5.5 <5.5 <5.5 <5.5 <5.5 5.5 10 i
11/05/08 <5.5 <5.5 <5.5 <5.5 <5.5 <5.5 5.5 10 f
05/19/09 <2.8 20.1 3.9 J <2.8 <2.8 10.7 2.8 10
11/18/09 5.74 JB 33.3 <2.8 <2.8 <2.8 8.59 JB 2.8 10 f
06/21/10 3.14 JB 26 15.5 B 3.42 JB <2.8 11.4 B 2.8 10
11/18/10 <2.8 36.9 <2.8 <2.8 <2.8 7.67 J 2.8 10
05/23/11 <2.8 21.8 <2.8 <2.8 <2.8 10.6 2.8 10
11/15/11 <2.8 <2.8 <2.8 <2.8 <2.8 2.8 10
06/05/12 <2.8 <2.8 3.22 J <2.8 <2.8 2.8 10
11/12/12 <2.8 3.27 J <2.8 <2.8 8.07 J 2.8 10
05/13/13 <5.4 <5.4 <5.4 <5.4 9.96 J 5.4 10
11/11/13 <5.40 <5.40 <5.40 <5.40 9.28 J 5.40 10.0
05/12/14 <5.40 <5.40 <5.40 <5.40 <5.40 5.40 10.0
11/11/14 <5.40 <5.40 <5.40 <5.40 <5.40 5.40 10.0
02/23/15
05/12/15 <6.80 <6.80 <6.80 <6.80 7.30 J 6.80 10
08/24/15
11/10/15 <6.80 8.45 J 10.5 10.2 15.5 6.80 10
Constituent Sample Date MW-1 MW-4 MW-5 MW-6 MW-13MW-7R
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
LOD SWSLMW-7
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
HISTORY OF CHEMICAL ANALYSIS
INORGANIC CONSTITUENTS: TOTAL METALS
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
MW-14A MW-14B QA/QCMW-6R
arsenic 04/17/90 <10 <10
MCL = 10 07/11/91 <10 <10
FBAC = 10 (SWSL)05/28/92 <10 <10 <10
NCGQS = 10 (2L Std)06/30/93 <10 <10 <10
2L Std = 50 (pre- Jan. 2010)11/04/94 <10 <10 <10 <10 cc,i,ms
2L Std = 10 (Jan. 2010)12/20/94 <10 <10 <10 <10 i
02/02/95 <10 <10 <10 <10
03/13/95 <10 <10 <10 <10 ms
11/15/95 <10 <10 <10 <10 ms
07/25/96 <10 <10 <10 <10 i,f,ms
02/25/97 <10 <10 <10 <10 i
09/03/97 <10 <10 <10 <10
05/04/98 <10 <10 <10 <10 i
11/02/98 <10 <10 <10 <10 i
04/26/99 <10 <10 <10 <10
11/22/99 <10 <10 <10 <10 q
05/23/00 <10 <10 <10 <10 <10 <10 <10 q
11/29/00 <10 <10 <10 <10 <10 <10 <10 q
06/05/01 <10 <10 <10 <10 <10 <10 <10
11/13/01 <10 <10 <10 <10 <10 <10 <10 ms
06/04/02 <10 <10 <10 <10 <10 <10 <10
03/12/03 <10 <10 <10 <10 <10 <10 <10
06/18/03 <10 <10 <10 <10 <10 <10 <10
12/03/03 <10 <10 <10 <10 <10 <10 <10
06/22/04 <10 <10 <10 <10 <10 <10 <10
11/30/04 <10 <10 <10 <10 <10 <10 <10
06/01/05 <10 <10 <10 <10 <10 <10 <10
11/02/05 <10 <10 <10 <10 <10 <10 <10
05/22/06 <10 <10 <10 <10 <10 <10 <10
11/27/06 <10 <10 <10 <10 <10 <10 <10
06/12/07 <5.5 <5.5 <5.5 <5.5 <5.5 <5.5 <5.5 <5.5 5.5 10
12/12/07 <5.5 <5.5 <5.5 <5.5 <5.5 <5.5 <5.5 5.5 10
03/06/08 5.5 10
06/12/08 <5.5 <5.5 <5.5 <5.5 <5.5 <5.5 <5.5 <5.5 <5.5 5.5 10 i
11/05/08 <5.5 <5.5 <5.5 <5.5 <5.5 <5.5 <5.5 <5.5 <5.5 5.5 10 f
05/19/09 <2.8 <2.8 <2.8 16 <2.8 <2.8 4.9 J <2.8 <2.8 2.8 10
11/18/09 <2.8 <2.8 <2.8 5.56 JB <2.8 <2.8 <2.8 2.92 JB <2.8 2.8 10 f
06/21/10 <2.8 3.72 JB <2.8 10.3 B <2.8 <2.8 <2.8 <2.8 <2.8 2.8 10
11/18/10 <2.8 <2.8 <2.8 <2.8 <2.8 <2.8 4.19 J <2.8 <2.8 2.8 10
05/23/11 <2.8 <2.8 <2.8 <2.8 <2.8 <2.8 <2.8 <2.8 <2.8 2.8 10
11/15/11 <2.8 <2.8 <2.8 <2.8 <2.8 <2.8 <2.8 <2.8 <2.8 2.8 10
06/05/12 <2.8 <2.8 <2.8 <2.8 <2.8 <2.8 <2.8 <2.8 <2.8 2.8 10
11/12/12 <2.8 <2.8 <2.8 <2.8 <2.8 <2.8 <2.8 <2.8 <2.8 2.8 10
05/13/13 <5.4 <5.4 <5.4 <5.4 <5.4 <5.4 <5.4 <5.4 <5.4 5.4 10
11/11/13 <5.40 <5.40 <5.40 <5.40 <5.40 <5.40 <5.40 <5.40 <5.40 5.40 10.0
05/12/14 <5.40 <5.40 <5.40 <5.40 <5.40 <5.40 <5.40 <5.40 <5.40 5.40 10.0
11/11/14 <5.40 <5.40 <5.40 <10.8 <5.40 <5.40 <5.40 <5.40 <5.40 5.40/10.8 10.0
02/23/15
05/12/15 <6.80 <6.80 <6.80 <6.80 <6.80 <6.80 <6.80 <6.80 <6.80 6.80 10
08/24/15
11/10/15 <6.80 <6.80 <6.80 <6.80 <6.80 <6.80 9.62 J 8.07 J 7.41 J 6.80 10
MW-16ConstituentSample Date QA/QCMW-20 MW-21D
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
HISTORY OF CHEMICAL ANALYSIS
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
INORGANIC CONSTITUENTS: TOTAL METALS
MW-21S MW-22 MW-23 LOD SWSLMW-15 MW-17 MW-24
barium 04/17/90 <50 71 <50 <50 <50
MCL = 2000 07/11/91 <100 <100 482 <100 111
FBAC = 500 (SPL)05/28/92 <100 <100 <100 <100 <100 <100 109 205
NCGQS = 700 (2L Std)06/30/93 <250 <500 <500 <500 <500 <500 <500
2L Std = 2000 (pre- Jan. 2010)11/04/94 <500 <500 <500 <500 <500 <500 i,sd
2L Std = 700 (Jan. 2010)12/20/94 <500 <500 <500 <500 <500 <500
02/02/95 <500 <500 <500 <500 <500 <500
03/13/95 <500 <500 <500 <500 <500 <500 <500 <500
11/15/95 <500 <500 <500 <500 <500 <500 <500 <500 ms
07/25/96 <500 <500 <500 <500 <500 <500 i,t,f
02/25/97 <500 <500 <500 <500 <500 <500 <500 <500 i,t,f,sd
09/03/97 <500 <500 <500 <500 <500
05/04/98 <500 <500 <500 <500 <500 <500 <500 <500
11/02/98 <500 <500 676 <500 <500 ics
04/26/99 <500 <500 <500 <500 <500
11/22/99 <500 <500 <500 <500 <500
05/23/00 <500 <500 <500 <500 <500 <500 <500 <500
11/29/00 <500 <500 <500 <500 <500 t, f
06/05/01 <500 <500 <500 <500 <500 <500 <500
11/13/01 <500 <500 <500
06/04/02 <500 <500 <500
03/12/03 <500 <500 <500 <500
06/18/03 <500 <500 <500 <500 <500
12/08/03 <500 <500 <500
06/22/04 <500 <500 <500
11/30/04 <500 <500 <500
06/01/05 <500 <500 <500
11/02/05 <500 <500 <500
05/22/06 <500 <500 <500
11/27/06 <500 <500 <500 i
06/12/07 64.9 JB 128 94.5 J 244 1.1 100 t, f
12/12/07 53.1 J 94.3 J 223 1.1 100 i
03/06/08 23.6 J 1.1 100
06/12/08 53.2 J 91.4 J 60.1 J 11.9 J 102 212 1.1 100 t, f
11/05/08 53.7 JB 163 20.4 JB 14.4 JB 108 223 1.1 100 t, f
05/19/09 68.8 J 77.9 J 33.5 J 8.83 J 33.4 J 273 4.2 100
11/18/09 57.6 J 71.5 J 14 J 4.63 J 61.4 J 254 1 100
06/21/10 107 49.5 J 122 8.31 J 47.2 J 190 1 100
11/18/10 63.3 J 91.3 J 18.1 J 3.12 J 41.8 J 218 1 100
05/23/11 77.5 J 67.3 J 17.2 J 22.1 J 59.6 J 256 1 100
11/15/11 66.3 J 15.6 J 6.67 J 43.3 J 264 1 100
06/05/12 88.1 J 30.3 J 20.7 J 50.7 J 253 1 100
11/12/12 67.1 J 33.2 J 21.6 J 39.9 J 266 1 100
05/13/13 64.1 J 17.6 J 18.4 J 59.1 J 240 1 100 i
11/11/13 64.2 J 22.7 J 23.3 J 105 275 1.00 100
05/12/14 66.8 J 22.3 J 16.5 J 29.2 J 258 1.00 100
11/11/14 67.9 J 16.1 J 6.42 J 101 276 1.00 100
02/23/15
05/12/15 79.3 J 17.3 J 10.0 J 59.9 J 309 1.00 100
08/24/15
11/10/15 65.5 J 15.0 J 4.93 J 99.3 J 261 1.00 100
LOCATION: CHAPEL HILL, NORTH CAROLINA
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
INORGANIC CONSTITUENTS: TOTAL METALS
HISTORY OF CHEMICAL ANALYSIS
PROJECT: GROUNDWATER MONITORING PROGRAM
MW-13MW-7RMW-5ConstituentSample Date MW-1 MW-14A MW-14BMW-4 MW-6 MW-7 LOD QA/QCSWSLMW-6R
barium 04/17/90 <50 <50
MCL = 2000 07/11/91 <100 <100
FBAC = 500 (SPL)05/28/92 <100 <100 <100
NCGQS = 700 (2L Std)06/30/93 <500 <500 <500
2L Std = 2000 (pre- Jan. 2010)11/04/94 <500 <500 <500 <500 i,sd
2L Std = 700 (Jan. 2010)12/20/94 <500 <500 <500 <500
02/02/95 <500 <500 <500 <500
03/13/95 <500 <500 <500 <500
11/15/95 <500 <500 <500 758 J ms
07/25/96 <500 <500 <500 <500 i,t,f
02/25/97 <500 <500 <500 <500 i,t,f,sd
09/03/97 <500 <500 <500 <500
05/04/98 <500 <500 <500 <500
11/02/98 <500 <500 <500 <500 ics
04/26/99 <500 <500 <500 <500
11/22/99 <500 <500 <500 <500
05/23/00 <500 <500 <500 <500 <500 <500 <500
11/29/00 <500 <500 <500 <500 <500 <500 <500 t, f
06/05/01 <500 <500 <500 <500 <500 <500 <500
11/13/01 <500 <500 <500 <500 <500 <500 <500
06/04/02 <500 <500 <500 <500 <500 <500 <500
03/12/03 <500 <500 <500 <500 <500 <500 <500
06/18/03 <500 <500 <500 <500 <500 <500 <500
12/08/03 <500 <500 <500 <500 <500 <500 <500
06/22/04 <500 <500 <500 <500 <500 <500 <500
11/30/04 <500 <500 <500 <500 <500 <500 <500
06/01/05 <500 <500 <500 <500 <500 <500 <500
11/02/05 <500 <500 <500 <500 <500 <500 <500
05/22/06 <500 <500 <500 <500 <500 <500 <500
11/27/06 <500 <500 <500 <500 <500 <500 <500 i
06/12/07 63.5 JB 112 35.5 JB 167 9.3 JB 13.9 JB 39.8 JB 193 1.1 100 t, f
12/12/07 43.4 J 148 27.7 J 165 4.4 JB 2.2 JB 37.7 J 1.1 100 i
03/06/08 1.1 100
06/12/08 89.1 J 114 20.3 J 171 2.6 JB 3.2 JB 66.7 J 5.9 JB 110 1.1 100 t, f
11/05/08 101 129 27.4 JB 237 1.8 JB 5 JB 53.2 JB 5.7 JB 14.5 JB 1.1 100 t, f
05/19/09 96.8 J 116 28.9 J 454 <4.2 6.25 J 58.6 J <4.2 9.85 J 4.2 100
11/18/09 86.6 J 222 26.8 J 338 2.31 J 8.2 J 45.9 J 3.26 J 10.9 J 1 100
06/21/10 65.7 J 177 20.8 J 92.2 J 2.21 J 7.0 J 37.2 J 2.92 J 12.5 J 1 100
11/18/10 75.5 J 148 21.9 J 126 2.19 J 10.4 J 47.7 J 4.35 J 10.9 J 1 100
05/23/11 129 155 26.2 J 197 2.32 J 4.78 J 57.3 J 4.84 J 9.69 J 1 100
11/15/11 93.7 J 163 25.8 J 495 2.36 J 15.3 J 56.5 J 7.17 J 7.42 J 1 100
06/05/12 125 144 28 J 171 2.37 J 4.76 J 59.9 J 5.2 J 10.2 J 1 100
11/12/12 141 187 24 J 244 D 2.04 J 1.95 J 59.1 J 16.3 J 9.5 J 1 100
05/13/13 90.8 J 123 20.8 J 168 2.19 J 7.26 J 55 J 3.14 J 8.36 J 1 100 i
11/11/13 114 139 29.7 J 155 2.97 J 3.02 J 56.7 J 5.12 J 7.38 J 1.00 100
05/12/14 66.2 J 170 30.5 J 176 2.80 J 7.19 J 53.0 J 3.71 J 7.47 J 1.00 100
11/11/14 148 129 28.9 J 186 2.82 J 4.84 J 58.2 J 4.96 J 6.53 J 1.00 100
02/23/15
05/12/15 105 127 30.7 J 208 2.37 J 15.2 J 68.4 J 6.54 J 7.33 J 1.00 100
08/24/15
11/10/15 123 172 25.8 J 159 2.86 J 1.93 J 55.4 J 5.37 J 6.96 J 1.00 100
LOD
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
SWSLMW-21DConstituentMW-16 MW-17 MW-21SMW-20Sample Date MW-15 MW-23
INORGANIC CONSTITUENTS: TOTAL METALS
MW-22 QA/QCMW-24
beryllium 04/17/90
MCL = 4 07/11/91
FBAC = 1 (SWSL)05/28/92
NCGQS = 4 (GWPS)06/30/93
11/04/94 <2 <2 <2 <2 <2 8 i
12/20/94 <2 <2 <2 <2 <2 10
02/02/95 <2 <2 2.7 <2 <2 20 i
03/13/95 <2 <2 2.8 3.8 2.1 <2 <2 24 t
11/15/95 <2 <2 2.6 2 7.1 <2 <2 20
07/25/96 <2 <2 <2 <2 <2 16 J d
02/25/97 <2 <2 <2 <2 <2 <2 <2 <2 f
09/03/97 <2 <2 <2 <2 8
05/04/98 3.6 <2 <2 <2 2.6 <2 <2 11.6
11/02/98 <2 <2 5.2 B <2 8.4 B i
04/26/99 <2 <2 <2 <2 7.6
11/22/99 <2 <2 <2 <2 <2
05/23/00 <2 <2 <2 <2 <2 <2 <2 <2
11/29/00 <2 <2 <2 <2 <2
06/05/01 <2 <2 <2 <2 <2 <2 <2
11/13/01 <2 <2 <2 i
06/04/02 <2 <2 <2
03/12/03 <2 <2 <2 <2
06/18/03 <2 <2 <2 <2 <2
12/08/03 <2 <2 <2
06/22/04 <2 <2 <2
11/30/04 <2 <2 <2
06/01/05 <2 <2 <2
11/02/05 <2 <2 <2
05/22/06 <2 <2 <2
11/27/06 <2 <2 <2
06/12/07 0.6 J 1.3 <0.2 <0.2 0.2 1
12/12/07 <0.2 1 B <0.2 0.2 1 i
03/06/08 <0.2 0.2 1
06/12/08 <0.2 <0.2 1.7 <0.2 0.3 J <0.2 0.2 1
11/05/08 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 0.2 1
05/19/09 0.08 J <0.08 0.14 J <0.08 <0.08 <0.08 0.08 1
11/18/09 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
06/21/10 <0.1 <0.1 0.473 J <0.1 <0.1 <0.1 0.1 1
11/18/10 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
05/23/11 0.125 J 0.111 J <0.1 <0.1 <0.1 <0.1 0.1 1
11/15/11 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
06/05/12 0.133 J <0.1 <0.1 <0.1 <0.1 0.1 1
11/12/12 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
05/13/13 <0.1 <0.1 <0.1 <0.1 0.118 J 0.1 1
11/11/13 <0.100 <0.100 <0.100 <0.100 <0.100 0.100 1
05/12/14 <0.100 <0.100 <0.100 <0.100 <0.100 0.100 1
11/11/14 <0.100 <0.100 <0.100 <0.100 <0.100 0.100 1
02/23/15
05/12/15 <0.100 0.118 J <0.100 <0.100 <0.100 0.100 1
08/24/15
11/10/15 <0.100 <0.100 <0.100 <0.100 <0.100 0.100 1
PROJECT: GROUNDWATER MONITORING PROGRAM
LOCATION: CHAPEL HILL, NORTH CAROLINA
MW-13 MW-14A MW-14B QA/QCMW-4 MW-5 MW-6 MW-7 MW-7R
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW-1
HISTORY OF CHEMICAL ANALYSIS
INORGANIC CONSTITUENTS: TOTAL METALS
Constituent Sample Date LOD SWSLMW-6R
beryllium 04/17/90
MCL = 4 07/11/91
FBAC = 1 (SWSL)05/28/92
NCGQS = 4 (GWPS)06/30/93
11/04/94 <2 <2 <2 5 i
12/20/94 <2 <2 <2 4
02/02/95 <2 <2 <2 18 i
03/13/95 <2 <2 <2 40 t
11/15/95 <2 <2 <2 35
07/25/96 <2 <2 <2 99 J d
02/25/97 <2 <2 <2 <2 f
09/03/97 <2 <2 <2 13
05/04/98 <2 <2 <2 23
11/02/98 <2 <2 <2 31 B i
04/26/99 <2 <2 <2 22.6
11/22/99 <2 <2 <2 <2
05/23/00 <2 <2 <2 <2 <2 <2 <2
11/29/00 <2 <2 <2 <2 <2 <2 <2
06/05/01 <2 <2 <2 <2 <2 <2 <2
11/13/01 <2 <2 <2 <2 <2 <2 <2 i
06/04/02 <2 <2 <2 <2 <2 <2 <2
03/12/03 <2 <2 <2 <2 <2 <2 <2
06/18/03 <2 <2 <2 <2 <2 <2 <2
12/08/03 <2 <2 <2 <2 <2 <2 <2
06/22/04 <2 <2 <2 <2 <2 <2 <2
11/30/04 <2 <2 <2 <2 <2 <2 <2
06/01/05 <2 <2 <2 <2 <2 <2 <2
11/02/05 <2 <2 <2 <2 <2 <2 <2
05/22/06 <2 <2 <2 <2 <2 <2 <2
11/27/06 <2 <2 <2 <2 <2 <2 <2
06/12/07 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 1.1 0.2 1
12/12/07 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 0.2 1 i
03/06/08 0.2 1
06/12/08 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 0.2 1
11/05/08 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 0.2 1
05/19/09 <0.08 <0.08 <0.08 <0.08 <0.08 <0.08 <0.08 <0.08 <0.08 0.08 1
11/18/09 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
06/21/10 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
11/18/10 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
05/23/11 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
11/15/11 <0.1 <0.1 <0.1 <0.1 <0.1 0.115 J <0.1 <0.1 <0.1 0.1 1
06/05/12 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
11/12/12 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
05/13/13 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
11/11/13 <0.100 <0.100 <0.100 <0.100 <0.100 <0.100 <0.100 <0.100 <0.100 0.100 1
05/12/14 <0.100 <0.100 <0.100 <0.100 <0.100 <0.100 <0.100 <0.100 <0.100 0.100 1
11/11/14 <0.100 <0.100 <0.100 <0.200 <0.100 <0.100 <0.100 <0.100 <0.100 0.100/0.200 1
02/23/15
05/12/15 <0.100 <0.100 <0.100 <0.100 <0.100 0.168 J <0.100 <0.100 <0.100 0.100 1
08/24/15
11/10/15 <0.100 <0.100 <0.100 <0.100 <0.100 <0.100 <0.100 <0.100 <0.100 0.100 1
LODMW-21D
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
MW-22
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
INORGANIC CONSTITUENTS: TOTAL METALS
MW-16
HISTORY OF CHEMICAL ANALYSIS
MW-23 SWSL QA/QCMW-17 MW-20ConstituentSample Date MW-15 MW-21S MW-24
cadmium 04/17/90 <2 <2 <2 <2 <2
MCL = 5 07/11/91 <2 <2 <2 <2 <2
FBAC = 1 (SWSL)05/28/92 <2 <2 <2 <2 <2 <2 <2 <2
NCGQS = 2 (2L Std)06/30/93 <2 2.7 3.8 <2 <2 4.3 <2
2L Std = 1.75 (pre- Jan. 2010)11/04/94 <1 <1 1 B <1 <1 1 B cc,i,f
2L Std = 2 (Jan. 2010)12/20/94 <1 <1 1 B <1 <1 <1 i
02/02/95 <1 <1 <1 <1 <1 1 B i
03/13/95 <1 <1 1.1 B <1 <1 <1 1.2 B 3 B f,t
11/15/95 1.1 B 1.2 B 1.7 B 7 B <1 <1 1.3 B <1 ms,t
07/25/96 <1 <1 <1 <1 <1 <1
02/25/97 <1 <1 <1 <1 1.2 B 1.1 B <1 <1 i,f
09/03/97 <1 <1 <1 <1 <1
05/04/98 <1 <1 <1 <1 <1 <1 <1 4.4 B f,t
11/02/98 1.2 B <1 <1 1.5 B <1 f,t
04/26/99 <1 <1 <1 <1 <1 cc,i
11/22/99 <1 <1 <1 <1 <1 lcs,i
05/23/00 <1 <1 <1 1 B <1 <1 38 R <1 i,t,f
11/29/00 <1 <1 <1 <1 <1 i,q
06/05/01 <1 <1 <1 <1 <1 <1 1
11/13/01 <1 <1 <1 <1 <1 <1 <1 cc,i,t,f
06/04/02 <1 <1 <1 d,i,t,f
03/12/03 <1 <1 <1 <1
06/18/03 1 B <1 1 B <1 t
12/08/03 <1 <1 <1
06/22/04 <1 <1 <1
11/30/04 <1 <1 <1
06/01/05 <1 <1 <1
11/02/05 <1 <1 <1
05/22/06 <1 <1 <1
11/27/06 <1 <1 <1
06/12/07 0.6 J 6.7 <0.2 3.8 0.2 1
12/12/07 <0.2 0.98 JB <0.2 0.2 1 i
03/06/08 0.48 J 0.2 1
06/12/08 <0.2 <0.2 0.8 JB 0.2 JB 0.8 JB <0.2 0.2 1 t, i
11/05/08 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 0.2 1 i
05/19/09 0.29 J 0.25 J 0.35 J 0.23 J 0.53 J 0.43 J 0.09 1
11/18/09 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 0.36 1
06/21/10 <0.36 <0.36 0.570 J <0.36 0.378 J <0.36 0.36 1
11/18/10 <0.36 <0.36 <0.36 <0.36 <0.36 0.52 J 0.36 1
05/23/11 <0.36 <0.36 0.567 J <0.36 0.435 J <0.36 0.36 1
11/15/11 <0.36 <0.36 <0.36 <0.36 <0.36 0.36 1
06/05/12 <0.36 <0.36 <0.36 <0.36 <0.36 0.36 1
11/12/12 <0.36 <0.36 <0.36 <0.36 <0.36 0.36 1
05/13/13 <0.36 1.06 <0.36 <0.36 <0.36 0.36 1
11/11/13 <0.360 <0.360 <0.360 <0.360 <0.360 0.360 1
05/12/14 <0.360 <0.360 <0.360 <0.360 <0.360 0.360 1
11/11/14 <0.360 <0.360 <0.360 <0.360 <0.360 0.360 1
02/23/15
05/12/15 <0.360 <0.360 <0.360 <0.360 <0.360 0.360 1
08/24/15
11/10/15 0.433 J 0.594 J <0.360 <0.360 <0.360 0.360 1
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
INORGANIC CONSTITUENTS: TOTAL METALS
MW-13MW-7R MW-14B QA/QCMW-14AConstituentSample Date MW-1 MW-4 MW-5 MW-6 MW-7 LOD SWSL
HISTORY OF CHEMICAL ANALYSIS
PROJECT: GROUNDWATER MONITORING PROGRAM
LOCATION: CHAPEL HILL, NORTH CAROLINA
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
MW-6R
cadmium 04/17/90 <2 <2
MCL = 5 07/11/91 <2 4.5
FBAC = 1 (SWSL)05/28/92 <2 <2 <2
NCGQS = 2 (2L Std)06/30/93 3.3 2.4 <2
2L Std = 1.75 (pre- Jan. 2010)11/04/94 <1 2 B <1 2 B cc,i,f
2L Std = 2 (Jan. 2010)12/20/94 <1 <1 <1 <1 i
02/02/95 <1 <1 <1 <1 i
03/13/95 1.2 B 1.4 B 1.3 B <1 f,t
11/15/95 <1 <1 1 B <1 ms,t
07/25/96 <1 <1 <1 <1
02/25/97 <1 <1 <1 <1 i,f
09/03/97 <1 <1 <1 <1
05/04/98 6.2 B 4.0 B 1.0 B <1 f,t
11/02/98 <1 <1 1.2 B <1 f,t
04/26/99 <1 <1 <1 <1 cc,i
11/22/99 <1 <1 <1 <1 lcs,i
05/23/00 4 B <1 <1 <1 <1 <1 <1 i,t,f
11/29/00 <1 <1 <1 <1 <1 <1 <1 i,q
06/05/01 <1 <1 1 <1 <1 <1 2
11/13/01 1 B <1 <1 3 B <1 <1 <1 cc,i,t,f
06/04/02 <1 <1 8 B <1 <1 <1 <1 d,i,t,f
03/12/03 <1 <1 <1 <1 <1 <1 <1
06/18/03 1 B <1 <1 <1 <1 <1 <1 t
12/08/03 <1 <1 1.6 <1 <1 <1 <1
06/22/04 <1 <1 <1 <1 <1 <1 <1
11/30/04 <1 <1 <1 <1 <1 <1 <1
06/01/05 <1 <1 <1 <1 <1 <1 <1
11/02/05 <1 <1 <1 <1 <1 <1 <1
05/22/06 <1 <1 <1 <1 2 <1 <1
11/27/06 <1 <1 <1 <1 <1 <1 <1
06/12/07 0.9 J <0.2 <0.2 19.9 <0.2 0.6 J 0.7 J 0.7 J 0.2 1
12/12/07 <0.2 <0.2 0.2 JB <0.2 0.2 JB <0.2 <0.2 0.2 1 i
03/06/08 0.2 1
06/12/08 <0.2 0.2 JB 0.3 JB <0.2 <0.2 <0.2 <0.2 <0.2 0.3 JB 0.2 1 t, i
11/05/08 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 0.6 JB 0.2 1 i
05/19/09 0.1 J 0.22 J 0.2 J 1.75 0.1 J <0.09 0.16 J <0.09 0.16 J 0.09 1
11/18/09 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 0.36 1
06/21/10 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 0.36 1
11/18/10 <0.36 <0.36 <0.36 1.23 <0.36 <0.36 <0.36 <0.36 <0.36 0.36 1
05/23/11 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 0.36 1
11/15/11 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 0.36 1
06/05/12 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 0.36 1
11/12/12 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 0.36 1
05/13/13 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 0.36 1
11/11/13 <0.360 0.378 J <0.360 <0.360 <0.360 <0.360 <0.360 <0.360 <0.360 0.360 1
05/12/14 <0.360 <0.360 <0.360 <0.360 <0.360 <0.360 <0.360 <0.360 <0.360 0.360 1
11/11/14 <0.360 <0.360 <0.360 <0.720 <0.360 <0.360 <0.360 <0.360 <0.360 0.360/0.720 1
02/23/15
05/12/15 <0.360 <0.360 <0.360 <0.360 <0.360 <0.360 <0.360 <0.360 <0.360 0.360 1
08/24/15
11/10/15 <0.360 <0.360 <0.360 <0.360 <0.360 <0.360 <0.360 <0.360 0.390 J 0.360 1
MW-22 QA/QCMW-16 MW-21S LOD SWSL
LOCATION: CHAPEL HILL, NORTH CAROLINA
MW-23 MW-24MW-20 MW-21D
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
Constituent MW-15Sample Date MW-17
chromium 04/17/90 <20 <20 <20 <20 <20
MCL = 100 07/11/91 <20 <20 <20 <20 <20
FBAC = 10 (SWSL)05/28/92 <20 <20 <20 <20 <20 <20 <20 <20
NCGQS = 10 (2L Std)06/30/93 <20 <20 <20 <20 <20 <20 <20
2L Std = 50 (pre- Jan. 2010)11/04/94 25 <10 24 <10 10.0 B <10
2L Std = 10 (Jan. 2010)12/20/94 <10 <10 48 <10 <10 <10
02/02/95 <10 <10 <10 <10 <10 <10
03/13/95 <10 <10 <10 <10 22.7 <10 <10 <10
11/15/95 <10 <10 12 <10 58 <10 <10 <10
07/25/96 13 B <10 <10 11 B <10 <10
02/25/97 <10 <10 <10 <10 93 B <10 <10 <10
09/03/97 <10 <10 <10 <10 <10
05/04/98 <10 <10 <10 <10 22.7 <10 <10 <10
11/02/98 <10 <10 <10 <10 <10
04/26/99 <10 <10 <10 <10 <10
11/22/99 <10 <10 <10 <10 <10
05/23/00 <10 <10 <10 <10 <10 <10 <10 <10 t,q
11/29/00 <10 <10 <10 <10 <10 i,f,q
06/05/01 <10 <10 <10 18 B <10 <10 <10 cc,t,f
11/13/01 <10 <10 <10
06/04/02 <10 <10 <10
03/12/03 <10 15 <10 <10
06/18/03 <10 <10 <10 <10 <10
12/08/03 <10 <10 <10
06/22/04 <10 <10 <10
11/30/04 <10 <10 <10
06/01/05 <10 <10 <10
11/02/05 <10 <10 <10
05/22/06 <10 <10 <10
11/27/06 <10 <10 <10
06/12/07 5.9 JB 33.5 6 JB <0.7 0.7 10 t,f
12/12/07 <0.7 8.3 J 1.4 JB 0.7 10 i
03/06/08 4.3 J 0.7 10
06/12/08 0.8 JB 0.7 JB 4.8 J <0.7 4.6 JB 1.3 JB 0.7 10 t
09/20/08 0.7 10
11/05/08 <0.7 28.6 2.4 JB 2.1 JB 5.6 JB <0.7 0.7 10 t, f
05/19/09 0.9 J 3.7 J <0.7 <0.7 1.9 J 2.7 J 0.7 10
11/18/09 <1 <1 <1 <1 <1 <1 1 10 i
06/21/10 4.74 J <1 3.54 J <1 <1 <1 1 10
11/18/10 2.9 J <1 1.33 J <1 <1 <1 1 10
05/23/11 1.99 J 6.1 J 1.63 J 1.53 J 2.39 J 4.44 J 1 10
11/15/11 <1 1.34 J <1 2.69 J 3.38 J 1 10
06/05/12 2.81 J 7.57 J 1.86 J 3.64 J 5.02 J 1 10
11/12/12 <1 9.18 J <1 1.72 J 2.53 J 1 10
05/13/13 <1.4 <1.4 <1.4 <1.4 <1.4 1.4 10
11/11/13 <1.40 <1.40 <1.40 3.94 J <1.40 1.40 10
05/12/14 <1.40 <1.40 <1.40 <1.40 <1.40 1.40 10
11/11/14 <1.40 <1.40 <1.40 3.71 J 2.47 J 1.40 10
02/23/15
05/12/15 <1.40 <1.40 <1.40 2.54 J 2.39 J 1.40 10
08/24/15
11/10/15 <1.40 <1.40 <1.40 3.13 J <1.40 1.40 10
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
MW-14A MW-14B QA/QCConstituentSample Date MW-1 MW-5 MW-6 MW-7 MW-13MW-7RMW-4
HISTORY OF CHEMICAL ANALYSIS
INORGANIC CONSTITUENTS: TOTAL METALS
SWSLLODMW-6R
chromium 04/17/90 <20 <20
MCL = 100 07/11/91 <20 <20
FBAC = 10 (SWSL)05/28/92 <20 <20 <20
NCGQS = 10 (2L Std)06/30/93 <20 <20 <20
2L Std = 50 (pre- Jan. 2010)11/04/94 <10 33 <10 32 i
2L Std = 10 (Jan. 2010)12/20/94 <10 12 <10 16
02/02/95 <10 <10 <10 12 i
03/13/95 <10 <10 <10 <10 f,t
11/15/95 <10 <10 <10 20 f
07/25/96 <10 <10 17 B <10 f,t,ms
02/25/97 <10 <10 <10 <10 f
09/03/97 <10 <10 <10 <10
05/04/98 <10 <10 <10 <10 i,t
11/02/98 <10 <10 <10 <10
04/26/99 <10 <10 <10 <10
11/22/99 <10 <10 <10 <10
05/23/00 <10 <10 <10 10 B <10 <10 <10 t,q
11/29/00 <10 <10 <10 <10 <10 <10 <10 i,f,q
06/05/01 <10 <10 <10 <10 <10 <10 <10 cc,t,f
11/13/01 <10 <10 <10 <10 <10 <10 <10
06/04/02 <10 <10 <10 <10 <10 <10 <10
03/12/03 <10 <10 <10 <10 <10 <10 <10
06/18/03 13 <10 <10 <10 <10 <10 <10
12/08/03 <10 <10 <10 <10 <10 <10 <10
06/22/04 <10 14 <10 <10 <10 <10 <10
11/30/04 <10 <10 <10 <10 <10 <10 <10
06/01/05 <10 <10 <10 <10 <10 <10 <10
11/02/05 <10 <10 <10 <10 <10 <10 <10
05/22/06 <10 <10 <10 <10 <10 <10 <10
11/27/06 <10 <10 <10 <10 <10 <10 <10
06/12/07 10.8 <0.7 2.7 JB <0.7 1.9 JB 2.2 JB 2.2 JB 103 R 0.7 10 t,f
12/12/07 6.7 JB <0.7 1.9 JB <0.7 <0.7 <0.7 <0.7 0.7 10 i
03/06/08 0.7 10
06/12/08 6.7 J <0.7 1.6 JB <0.7 <0.7 <0.7 <0.7 <0.7 129 R 0.7 10 t
09/20/08 2.4 J 0.7 10
11/05/08 7.8 J <0.7 2.3 JB <0.7 <0.7 2.2 JB 1.8 JB <0.7 1.2 JB 0.7 10 t, f
05/19/09 7 J 1.3 J 2.2 J <0.7 1.6 J 5.1 J 1.4 J 1.2 J 1.3 J 0.7 10
11/18/09 <1 2.87 JB <1 <1 1.37 JB 7.49 JB <1 2.68 JB 1.81 JB 1 10 i
06/21/10 <1 <1 <1 <1 1.28 J 9.64 J <1 3.44 J 2.83 J 1 10
11/18/10 <1 <1 <1 <1 <1 1.26 J <1 1.6 J 3.67 J 1 10
05/23/11 8.29 J <1 2.48 J <1 1.44 J 4.62 J 1.12 J <1 <1 1 10
11/15/11 5.83 J <1 2.33 J 1.81 J 3.82 J 2.77 J <1 9.8 J <1 1 10
06/05/12 8.15 J 1.39 J 3.21 J <1 4.32 J 2.43 J 2.03 J 35.9 3.55 J 1 10
11/12/12 3.85 J <1 1.14 J <1 21.6 17.8 1.34 J 60.1 4.13 J 1 10
05/13/13 <1.4 <1.4 <1.4 <1.4 8.48 J 88.8 <1.4 65.3 4.34 J 1.4 10
11/11/13 3.74 J <1.40 1.85 J <1.40 27.0 77.7 <1.40 98.9 7.72 J 1.40 10
05/12/14 2.05 J 2.20 J 1.40 J <1.40 22.3 88.6 <1.40 118 <1.40 1.40 10
11/11/14 4.29 J <1.40 1.69 J <2.80 49.0 64.6 <1.40 83.9 20.5 1.40/2.80 10
02/23/15
05/12/15 4.04 J 3.54 JB 2.57 JB <1.40 19.3 115 <1.40 84.1 2.31 J 1.40 10 i
08/24/15
11/10/15 3.41 J <1.40 <1.40 <1.40 7.84 J 94.1 <1.40 57.7 3.83 J 1.40 10
MW-24 LOD SWSLMW-20 MW-21D MW-21S
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
MW-23
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
QA/QCConstituent
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
HISTORY OF CHEMICAL ANALYSIS
INORGANIC CONSTITUENTS: TOTAL METALS
MW-22Sample Date MW-15 MW-16 MW-17
cobalt 04/17/90MCL =07/11/91
FBAC = 10 (SWSL)05/28/92
NCGQS = 1 (GWPS)06/30/93
GWPS = 70 (pre-Oct. 2010)11/04/94 17 <4 <4 22 16 23 i
GWPS = 1 (Oct. 2010)12/20/94 <10 <10 <10 23 104 22
02/02/95 <10 <10 <10 <10 144 25 f
03/13/95 <10 <10 100 <10 <10 <10 <10 21
11/15/95 <10 <10 91 J <10 17 J <10 12 J 24 J ms
07/25/96 <10 <10 <10 <10 91 B 16 B f,ms
02/25/97 <10 <10 140 <10 27 <10 102 27 i,f,t
09/03/97 <10 <10 20 <10 27 i
05/04/98 <10 <10 132 <10 <10 <10 78 24
11/02/98 93.2 <10 40 102 18.9 i
04/26/99 <10 <10 <10 21 25 i
11/22/99 <10 <10 <10 50 J 17 J d,i,t,f,q
05/23/00 <10 <10 212 <10 <10 <10 16 B 42 i,t,f
11/29/00 <10 <10 17 J 40 J <10 f,q
06/05/01 <10 <10 278 <10 11 B <10 28 B i,t,f
11/13/01 <10 <10 28 t
06/04/02 <10 <10 34 i
03/12/03 <10 <10 <10 26
06/18/03 <10 <10 <10 <10 27
12/08/03 <10 31 28
06/22/04 <10 <10 31
11/30/04 <10 12 28
06/01/05 <10 15 27
11/02/05 <10 16 28
05/22/06 <10 <10 22
11/27/06 <10 29 23
06/12/07 0.9 J 19.1 11.2 27.2 0.7 10
12/12/07 <0.7 27.4 27.6 0.7 10
03/06/08 2.2 J 0.7 10
06/12/08 <0.7 241 13.3 <0.7 26.2 24.8 0.7 10
11/05/08 <0.7 237 2 J 1.6 J 31.5 26.9 0.7 10
05/19/09 <0.6 173 1.7 J 0.7 J 2.3 J 34.3 0.6 10
11/18/09 <1.1 186 1.47 J <1.1 17.5 29.3 1.1 10
06/21/10 3.37 J 134 5.33 J <1.1 9.25 J 23 1.1 10
11/18/10 <1.1 177 2.24 J <1.1 14.1 23 1.1 10
05/23/11 <1.1 204 2.42 J <1.1 9.23 J 31.2 1.1 10
11/15/11 <1.1 2.03 J <1.1 13.5 31 1.1 10
06/05/12 1.61 J 1.69 J <1.1 5.18 J 31.1 1.1 10
11/12/12 <1.1 <1.1 1.34 J 13.2 31 1.1 10
05/13/13 <1.1 1.36 J 1.19 J 15.7 37.9 1.1 10 i
11/11/13 <1.10 2.58 J 3.56 J 46.7 29.7 1.10 10
05/12/14 <1.10 1.90 J <1.10 4.11 J 53.8 1.10 10
11/11/14 <1.10 2.86 J 1.26 J 46.2 30.3 1.10 10
02/23/15
05/12/15 <1.10 3.64 J <1.10 8.96 J 57.1
08/24/15
11/10/15 <1.10 3.26 J <1.10 43.9 30.8 1.10 10
QA/QC
HISTORY OF CHEMICAL ANALYSIS
Sample Date MW-1 MW-4 MW-5 MW-6 MW-13MW-7R LOD SWSL
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
Constituent MW-7 MW-14A MW-14BMW-6R
cobalt 04/17/90MCL =07/11/91
FBAC = 10 (SWSL)05/28/92
NCGQS = 1 (GWPS)06/30/93
GWPS = 70 (pre-Oct. 2010)11/04/94 <4 <4 <4 60 i
GWPS = 1 (Oct. 2010)12/20/94 <10 <10 <10 38
02/02/95 <10 <10 <10 84 f
03/13/95 <10 <10 <10 109
11/15/95 <10 <10 <10 70 J ms
07/25/96 <10 <10 <10 69 J f,ms
02/25/97 <10 <10 <10 80 i,f,t
09/03/97 <10 <10 <10 63 i
05/04/98 12.9 <10 <10 70
11/02/98 14.4 <10 <10 46.7 i
04/26/99 16 B <10 <10 63 i
11/22/99 24 J <10 <10 72 J d,i,t,f,q
05/23/00 21 <10 <10 55 <10 <10 <10 i,t,f
11/29/00 22 J <10 <10 67 J <10 <10 <10 f,q
06/05/01 22 B <10 <10 56 <10 <10 <10 i,t,f
11/13/01 21 <10 <10 52 <10 <10 <10 t
06/04/02 27 <10 <10 42 <10 <10 <10 i
03/12/03 31 <10 <10 71 <10 <10 <10
06/18/03 22 <10 <10 53 <10 <10 <10
12/08/03 26 <10 <10 38 <10 <10 <10
06/22/04 28 <10 <10 24 <10 <10 <10
11/30/04 28 <10 <10 36 <10 <10 <10
06/01/05 25 <10 <10 36 <10 <10 <10
11/02/05 27 <10 <10 16 <10 <10 <10
05/22/06 22 <10 <10 17 <10 <10 <10
11/27/06 22 <10 <10 27 <10 <10 <10
06/12/07 31.4 3.1 J 2 J 19.2 <0.7 0.8 J 0.7 J 43.8 0.7 10
12/12/07 20 2.5 J 2.6 J 16.8 <0.7 <0.7 <0.7 0.7 10
03/06/08 0.7 10
06/12/08 39.8 2.1 J 2.2 J 18.4 <0.7 <0.7 <0.7 <0.7 61.6 0.7 10
11/05/08 37.2 2 J 2.9 J 22.4 <0.7 <0.7 1.8 J <0.7 2.8 J 0.7 10
05/19/09 37.8 3.5 J 3.3 J 58.7 <0.6 0.8 J <0.6 <0.6 0.7 J 0.6 10
11/18/09 28 1.82 J 3.31 J 19.8 <1.1 1.85 J <1.1 <1.1 2.04 J 1.1 10
06/21/10 23 1.54 J 2.39 J 7.61 J <1.1 2.12 J <1.1 <1.1 2.90 J 1.1 10
11/18/10 28.6 2.36 J 2.59 J 7.65 J <1.1 <1.1 <1.1 <1.1 3.89 J 1.1 10
05/23/11 44.6 2.45 J 3.65 J 13.7 <1.1 1.34 J <1.1 <1.1 1.82 J 1.1 10
11/15/11 31.3 2.65 J 3.71 J 34.1 <1.1 <1.1 <1.1 <1.1 2.63 J 1.1 10
06/05/12 40.7 3.29 J 3.83 J 16.3 <1.1 <1.1 <1.1 <1.1 4.88 J 1.1 10
11/12/12 36.8 2.54 J 3.1 J 19.9 JD <1.1 <1.1 <1.1 <1.1 6.05 J 1.1 10
05/13/13 26.5 2.93 JB 2.63 JB 11.8 B <1.1 <1.1 <1.1 <1.1 3.07 J 1.1 10 i
11/11/13 30.1 2.96 J 3.60 J 11.1 <1.10 <1.10 <1.10 <1.10 1.59 J 1.10 10
05/12/14 18.1 3.70 J 4.00 J 15.6 <1.10 <1.10 <1.10 <1.10 1.32 J 1.10 10
11/11/14 36.5 2.74 J 3.44 J 14.9 JD <1.10 <1.10 <1.10 <1.10 <1.10 1.10 10
02/23/15
05/12/15 29.9 4.67 J 3.82 J 12.8 <1.10 1.21 J <1.10 <1.10 <1.10 1.10 10
08/24/15
11/10/15 27.3 3.17 J 3.61 J 15.7 <1.10 <1.10 <1.10 <1.10 <1.10 1.10 10
Constituent
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
HISTORY OF CHEMICAL ANALYSIS
INORGANIC CONSTITUENTS: TOTAL METALS
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
MW-24 QA/QCLODSWSLMW-20 MW-23MW-21D MW-21S MW-22Sample Date MW-15 MW-16 MW-17
copper 04/17/90 <20 <20 <20 <20 <20
MCL = 1300 07/11/91 <20 <20 <20 <20 <20
FBAC = 10 (SWSL)05/28/92 <20 <20 35 <20 <20 <20 <20 <20
NCGQS = 1000 (2L Std)06/30/93 <20 <20 <20 <20 <20 22 20
11/04/94 <200 <200 <200 <200 <200 <200 i,sd
12/20/94 <200 <200 <200 <200 <200 <200
02/02/95 <200 <200 <200 <200 <200 <200
03/13/95 <200 <200 <200 <200 <200 <200 <200 <200
11/15/95 <200 <200 211 <200 <200 <200 <200 <200
07/25/96 <200 <200 <200 <200 <200 <200 i,t,f
02/25/97 <200 <200 <200 <200 <200 <200 <200 <200
09/03/97 <200 <200 <200 <200 <200
05/04/98 <200 <200 <200 <200 <200 <200 <200 <200
11/02/98 <200 <200 <200 <200 <200
04/26/99 <200 <200 <200 <200 <200 i
11/22/99 <200 <200 <200 <200 <200
05/23/00 <200 <200 <200 <200 <200 <200 <200 <200
11/29/00 <200 <200 <200 <200 <200 i,f
06/05/01 <200 <200 <200 <200 <200 <200 <200 i,md
11/13/01 <200 <200 <200 i,f
06/04/02 <200 <200 <200
03/12/03 <200 <200 <200 <200
06/18/03 <200 <200 <200 <200 <200
12/08/03 <200 <200 <200
06/22/04 <200 <200 <200
11/30/04 <200 <200 <200
06/01/05 <200 <200 <200
11/02/05 <200 <200 <200
05/22/06 <200 <200 <200
11/27/06 <200 <200 <200
06/12/07 <2 333 18.4 <2 2 10 t,f
12/12/07 2.6 JB 24 <2 2 10 t,f
03/06/08 18.9 2 10
06/12/08 <2 14.8 B 11.1 2.9 JB 11.2 B 4.2 JB 2 10 t
11/05/08 <2 2.2 JB 3.5 JB <2 26.8 B <2 2 10 f, i
05/19/09 2.76 J 7.39 J <0.81 <0.81 13.5 <0.81 0.81 10
11/18/09 2.03 J 13.6 <1.6 <1.6 12.5 <1.6 1.6 10
06/21/10 26.5 3.8 J 7.03 J <1.6 32.8 <1.6 1.6 10
11/18/10 7.7 J 3.6 J <1.6 <1.6 17.4 <1.6 1.6 10
05/23/11 8.77 J 4.72 J <1.6 <1.6 23.9 <1.6 1.6 10
11/15/11 2.92 J <1.6 <1.6 19.3 <1.6 1.6 10
06/05/12 10.6 2.78 J <1.6 21.1 <1.6 1.6 10
11/12/12 <1.6 2.1 J <1.6 15.6 <1.6 1.6 10
05/13/13 <1.6 <1.6 <1.6 15 <1.6 1.6 10
11/11/13 <1.60 <1.60 <1.60 19.5 <1.60 1.60 10
05/12/14 <1.60 <1.60 <1.60 21.3 <1.60 1.60 10
11/11/14 <1.60 <1.60 <1.60 17.5 <1.60 1.60 10
02/23/15
05/12/15 <1.60 <1.60 <1.60 17.4 <1.60 1.60 10
08/24/15
11/10/15 <1.60 <1.60 <1.60 13.9 <1.60 1.60 10
HISTORY OF CHEMICAL ANALYSIS
MW-14A MW-14B QA/QC
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
LOD SWSLMW-5 MW-6 MW-7 MW-13ConstituentSample Date MW-1 MW-4 MW-7RMW-6R
copper 04/17/90 <20 <20
MCL = 1300 07/11/91 <20 <20
FBAC = 10 (SWSL)05/28/92 <20 <20 <20
NCGQS = 1000 (2L Std)06/30/93 <20 29 <20
11/04/94 <200 <200 <200 <200 i,sd
12/20/94 <200 <200 <200 <200
02/02/95 <200 <200 <200 <200
03/13/95 <200 <200 <200 <200
11/15/95 <200 <200 <200 <200
07/25/96 <200 <200 <200 <200 i,t,f
02/25/97 <200 <200 <200 <200
09/03/97 <200 <200 <200 <200
05/04/98 <200 <200 <200 <200
11/02/98 <200 <200 <200 <200
04/26/99 <200 <200 <200 <200 i
11/22/99 <200 <200 <200 <200
05/23/00 <200 <200 <200 <200 <200 <200 <200
11/29/00 <200 <200 <200 <200 <200 <200 <200 i,f
06/05/01 <200 <200 <200 <200 <200 <200 <200 i,md
11/13/01 <200 <200 <200 <200 <200 <200 <200 i,f
06/04/02 <200 <200 <200 <200 <200 <200 <200
03/12/03 <200 <200 <200 <200 <200 <200 <200
06/18/03 <200 <200 <200 <200 <200 <200 <200
12/08/03 <200 <200 <200 <200 <200 <200 <200
06/22/04 <200 <200 <200 <200 <200 <200 <200
11/30/04 <200 <200 <200 <200 <200 <200 <200
06/01/05 <200 <200 <200 <200 <200 <200 <200
11/02/05 <200 <200 <200 <200 <200 <200 <200
05/22/06 <200 <200 <200 <200 <200 <200 <200
11/27/06 <200 <200 <200 <200 <200 <200 <200
06/12/07 3.2 JB 2.3 JB 4.2 JB <2 3.5 JB 4.7 JB 3.1 JB 118 2 10 t,f
12/12/07 2.2 JB 3.5 JB 4.5 JB <2 3.7 JB 3.2 JB <2 2 10 t,f
03/06/08 2 10
06/12/08 2.5 JB 2 JB 2.3 JB <2 <2 <2 <2 <2 334 2 10 t
11/05/08 <2 <2 <2 <2 <2 <2 <2 <2 2.6 JB 2 10 f, i
05/19/09 <0.81 <0.81 <0.81 <0.81 <0.81 <0.81 <0.81 <0.81 <0.81 0.81 10
11/18/09 <1.6 <1.6 <1.6 <1.6 <1.6 <1.6 <1.6 <1.6 <1.6 1.6 10
06/21/10 <1.6 <1.6 <1.6 <1.6 <1.6 5.54 J <1.6 1.87 J <1.6 1.6 10
11/18/10 <1.6 <1.6 <1.6 6.88 J <1.6 <1.6 <1.6 <1.6 1.69 J 1.6 10
05/23/11 <1.6 <1.6 1.89 J <1.6 <1.6 2.75 J <1.6 1.84 J <1.6 1.6 10
11/15/11 <1.6 <1.6 <1.6 <1.6 <1.6 <1.6 <1.6 <1.6 <1.6 1.6 10
06/05/12 <1.6 <1.6 <1.6 <1.6 <1.6 <1.6 <1.6 <1.6 <1.6 1.6 10
11/12/12 <1.6 <1.6 <1.6 <1.6 3.22 J <1.6 <1.6 <1.6 <1.6 1.6 10
05/13/13 <1.6 <1.6 <1.6 <1.6 <1.6 <1.6 <1.6 <1.6 <1.6 1.6 10
11/11/13 <1.60 4.80 J <1.60 <1.60 <1.60 <1.60 <1.60 <1.60 <1.60 1.60 10
05/12/14 <1.60 <1.60 <1.60 <1.60 <1.60 <1.60 <1.60 <1.60 <1.60 1.60 10
11/11/14 <1.60 <1.60 1.70 J <3.20 <1.60 <1.60 <1.60 <1.60 <1.60 1.60/3.20 10
02/23/15
05/12/15 <1.60 <1.60 <1.60 <1.60 <1.60 <1.60 <1.60 <1.60 <1.60 1.60 10
08/24/15
11/10/15 <1.60 <1.60 <1.60 <1.60 <1.60 <1.60 <1.60 <1.60 <1.60 1.60 10
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
MW-17 QA/QCMW-23
INORGANIC CONSTITUENTS: TOTAL METALS
MW-20 MW-21D MW-21SConstituent MW-22Sample Date MW-15 MW-16 LODMW-24 SWSL
lead 04/17/90 <5 <5 <5 <5 <5
MCL = 15 07/11/91 <5 7.3 <5 <5 <5
FBAC = 10 (SWSL)05/28/92 <10 <10 18.3 <10 <10 <10 11.2 <10
NCGQS = 15 (2L Std)06/30/93 <5 <5 54 30 <5 5.6 5.3
11/04/94 <10 <10 <10 <10 <10 <10 cc,i
12/20/94 <10 <10 11 B <10 <10 <10 f
02/02/95 13 B <10 <10 <10 <10 <10 i
03/13/95 <10 <10 40 55 <10 <10 <10 14 B t,f
11/15/95 <10 <10 54 J 36 J 15 J <10 <10 <10 ms,i,f
07/25/96 <10 <10 18 J <10 <10 <10 f,ms
02/25/97 <10 <10 16 B 63 B 46 B <10 10 B <10 i,f,t,ms
09/03/97 <10 <10 <10 <10 <10 i
05/04/98 24 B <10 37 43 21 B <10 10 B <10 f,t
11/02/98 <10 <10 <10 <10 <10
04/26/99 <10 <10 <10 <10 <10
11/22/99 <10 <10 <10 <10 <10 cc,i,q
05/23/00 <10 <10 <10 <10 <10 <10 <10 <10 t
11/29/00 <10 <10 <10 <10 <10 q
06/05/01 <10 <10 <10 16 <10 <10 <10
11/13/01 <10 <10 <10
06/04/02 <10 <10 <10 t
03/12/03 <10 <10 <10 <10
06/18/03 <10 <10 <10 <10 <10
12/08/03 <10 <10 <10
06/22/04 <10 <10 <10
11/30/04 <10 <10 <10
06/01/05 <10 <10 <10
11/02/05 <10 <10 <10
05/22/06 <10 <10 <10
11/27/06 <10 <10 <10
06/12/07 6.6 JB 19 <2 <2 2 10 t,f
12/12/07 <2 4.2 J <2 2 10
03/06/08 <2 2 10
06/12/08 <2 8.5 J 17.2 <2 2.8 J 5.2 J 2 10
11/05/08 <2 3.9 J 4.7 JB <2 5.6 JB <2 2 10 i
05/19/09 <1.6 3.3 J 2.4 J <1.6 <1.6 5.8 J 1.6 10
11/18/09 <1.9 5.31 J 1.94 J <1.9 <1.9 5.5 J 1.9 10
06/21/10 3.87 J <1.9 14.6 <1.9 <1.9 3.27 J 1.9 10
11/18/10 1.98 J 3.26 J <1.9 <1.9 2.13 J 3.05 J 1.9 10
05/23/11 <1.9 4.62 J <1.9 <1.9 <1.9 4.71 J 1.9 10
11/15/11 <1.9 <1.9 <1.9 <1.9 <1.9 1.9 10
06/05/12 <1.9 <1.9 <1.9 <1.9 3 J 1.9 10
11/12/12 2.36 J <1.9 <1.9 <1.9 3.94 J 1.9 10
05/13/13 <2.1 <2.1 <2.1 <2.1 <2.1 2.1 10
11/11/13 <2.10 <2.10 <2.10 <2.10 3.24 J 2.10 10
05/12/14 <2.10 <2.10 <2.10 <2.10 2.51 J 2.10 10
11/11/14 <2.10 <2.10 <2.10 <2.10 <2.10 2.10 10
02/23/15
05/12/15 <3.10 <3.10 <3.10 <3.10 <3.10 3.10 10
08/24/15
11/10/15 <3.10 3.74 J <3.10 <3.10 3.44 J 3.10 10
MW-13 MW-14AMW-7R
HISTORY OF CHEMICAL ANALYSIS
PROJECT: GROUNDWATER MONITORING PROGRAM
INORGANIC CONSTITUENTS: TOTAL METALS
Constituent MW-6 MW-7Sample Date MW-1 MW-4 MW-5
LOCATION: CHAPEL HILL, NORTH CAROLINA
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
LOD SWSL QA/QCMW-14BMW-6R
lead 04/17/90 <5 <5
MCL = 15 07/11/91 <5 <5
FBAC = 10 (SWSL)05/28/92 <10 <10 <10
NCGQS = 15 (2L Std)06/30/93 <5 <5 <5
11/04/94 <10 <10 <10 <10 cc,i
12/20/94 <10 <10 <10 <10 f
02/02/95 <10 <10 <10 <10 i
03/13/95 19 B <10 <10 <10 t,f
11/15/95 <10 <10 <10 <10 ms,i,f
07/25/96 <10 <10 <10 <10 f,ms
02/25/97 <10 <10 <10 <10 i,f,t,ms
09/03/97 <10 <10 <10 <10 i
05/04/98 <10 <10 <10 <10 f,t
11/02/98 <10 <10 <10 <10
04/26/99 <10 <10 <10 <10
11/22/99 <10 <10 <10 <10 cc,i,q
05/23/00 <10 <10 <10 <10 <10 <10 <10 t
11/29/00 <10 <10 <10 <10 <10 <10 <10 q
06/05/01 <10 <10 <10 <10 <10 <10 <10
11/13/01 <10 <10 <10 <10 <10 <10 <10
06/04/02 <10 <10 <10 <10 <10 <10 <10 t
03/12/03 <10 <10 <10 <10 <10 <10 <10
06/18/03 <10 <10 <10 <10 <10 <10 <10
12/08/03 <10 <10 <10 <10 <10 <10 <10
06/22/04 <10 <10 <10 <10 <10 <10 <10
11/30/04 <10 <10 <10 <10 <10 <10 <10
06/01/05 <10 <10 <10 <10 <10 <10 <10
11/02/05 <10 <10 <10 <10 <10 <10 <10
05/22/06 <10 <10 <10 <10 <10 <10 <10
11/27/06 <10 <10 <10 <10 <10 <10 <10
06/12/07 3.1 JB 3 JB 3.6 JB 2.9 JB 2.4 JB 2.6 JB 2.1 JB 4.8 J 2 10 t,f
12/12/07 <2 <2 <2 7.4 J <2 <2 <2 2 10
03/06/08 2 10
06/12/08 2.8 J <2 <2 13.1 <2 <2 <2 <2 6.7 J 2 10
11/05/08 4.8 JB <2 <2 9.2 JB <2 <2 <2 <2 3.3 JB 2 10 i
05/19/09 4.3 J <1.6 <1.6 12.3 <1.6 <1.6 <1.6 <1.6 1.7 J 1.6 10
11/18/09 2.25 J <1.9 <1.9 11.3 <1.9 3.22 J <1.9 <1.9 <1.9 1.9 10
06/21/10 2.30 J <1.9 <1.9 7.23 J <1.9 <1.9 <1.9 <1.9 <1.9 1.9 10
11/18/10 3.51 J <1.9 <1.9 3.85 J <1.9 1.94 J <1.9 <1.9 1.99 J 1.9 10
05/23/11 3.41 J <1.9 <1.9 16.7 <1.9 <1.9 <1.9 <1.9 <1.9 1.9 10
11/15/11 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 1.9 10
06/05/12 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 1.9 10
11/12/12 <1.9 <1.9 <1.9 12.6 JD <1.9 <1.9 <1.9 <1.9 <1.9 1.9 10
05/13/13 <2.1 <2.1 <2.1 <2.1 <2.1 <2.1 <2.1 <2.1 <2.1 2.1 10
11/11/13 <2.10 <2.10 <2.10 12.4 <2.10 <2.10 <2.10 <2.10 <2.10 2.10 10
05/12/14 3.01 J <2.10 3.27 J 11.0 <2.10 4.23 J <2.10 <2.10 <2.10 2.10 10
11/11/14 <2.10 <2.10 <2.10 <4.20 <2.10 <2.10 <2.10 <2.10 <2.10 2.10/4.20 10
02/23/15
05/12/15 <3.10 <3.10 <3.10 <3.10 <3.10 4.16 J <3.10 <3.10 <3.10 3.10 10
08/24/15
11/10/15 <3.10 <3.10 <3.10 7.42 J <3.10 <3.10 <3.10 <3.10 <3.10 3.10 10
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
Constituent MW-22 SWSLMW-23 LOD
INORGANIC CONSTITUENTS: TOTAL METALS
MW-24 QA/QCMW-15 MW-16 MW-17 MW-20 MW-21D MW-21SSample Date
mercury 04/17/90 <0.2 <0.2 <0.2 <0.2 <0.2
MCL = 2 07/11/91 <0.2 <0.2 0.58 0.3 <0.2 <0.2
FBAC = 0.2 (SWSL)05/28/92 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2
NCGQS = 1 (2L Std)06/30/93 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2
2L Std = 1.05 (pre- Jan. 2010)11/04/94
2L Std = 1 (Jan. 2010)12/20/94
02/02/95
03/13/95
11/15/95
07/25/96 <0.5 <0.5
02/25/97 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5
09/03/97
05/04/98
11/02/98 <0.2 <0.2 0.2 <0.2 0.2
04/26/99 <0.2 <0.2 0.7 B <0.2 d,i
11/22/99 <0.2 <0.2 0.5 B <0.2 <0.2 i
05/23/00 <0.2 0.6 J <0.2 0.3 J <0.2 0.5 J d,cc
11/29/00 <0.2 <0.2 <0.2 <0.2 <0.2 d
06/05/01 <0.2 0.3 <0.2 0.9 <0.2
11/13/01
06/04/02 <0.2 <0.2 <0.2
03/12/03 <0.2 <0.2 <0.2 <0.2
06/18/03 <0.2 <0.2 <0.2 <0.2 <0.2
12/08/03 <0.2 <0.2 <0.2
06/22/04 <0.2 <0.2 <0.2
11/30/04 <0.2 <0.2 <0.2
06/01/05 <0.2 <0.2 <0.2
11/02/05 <0.2 <0.2 <0.2
05/22/06 <0.2 <0.2 <0.2
11/27/06 <0.2 <0.2 <0.2
06/12/07 <0.01 0.04 J <0.01 <0.01 0.01 0.2
12/12/07 0.02 JB <0.01 <0.01 0.01 0.2 i
03/06/08 <0.01 0.01 0.2
06/12/08 0.1 JB 0.04 JB 0.06 JB <0.01 0.02 JB 0.01 0.2 f
11/05/08 0.14 JB <0.01 0.16 JB 0.04 JB <0.01 <0.01 0.01 0.2 f, i
05/19/09 <0.05 <0.05 0.35 <0.05 <0.05 <0.05 0.05 0.2
11/18/09 <0.054 0.117 J 0.805 <0.054 <0.054 <0.054 0.054 0.2
06/21/10 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 0.2
11/18/10 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 0.2
injection event (03-29-11)05/23/11 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 0.2
08/23/11
injection event (09-28-11)11/15/11 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 0.2
02/21/12
injection event (04-14-12)06/05/12 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 0.2
10/09/12
injection event (09-13-12)11/12/12 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 0.2
02/18/13
05/13/13 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 0.2
11/11/13 <0.170 <0.170 <0.170 <0.170 <0.170 0.170 0.2
02/10/14 0.170 0.2
05/12/14 <0.170 <0.170 <0.170 <0.170 <0.170 0.170 0.2
08/18/14 0.170 0.2
11/11/14 <0.170 <0.170 <0.170 <0.170 <0.170 0.170 0.2
02/23/15 0.170 0.2
05/12/15 <0.170 <0.170 <0.170 <0.170 <0.170 0.170 0.2
08/24/15
11/10/15 <0.170 <0.170 <0.170 <0.170 <0.170 0.170 0.2
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
LOD SWSLMW-14AMW-6 MW-14BConstituentMW-13Sample Date MW-1 MW-4 MW-5 MW-7 QA/QCMW-7R
HISTORY OF CHEMICAL ANALYSIS
INORGANIC CONSTITUENTS: TOTAL METALS
MW-6R
mercury 04/17/90 <0.2 <0.2
MCL = 2 07/11/91 <0.2 <0.2
FBAC = 0.2 (SWSL)05/28/92 <0.2 <0.2 <0.2
NCGQS = 1 (2L Std)06/30/93 <0.2 <0.2 <0.2
2L Std = 1.05 (pre- Jan. 2010)11/04/94
2L Std = 1 (Jan. 2010)12/20/94
02/02/95
03/13/95
11/15/95
07/25/96 <0.5 <0.5
02/25/97 <0.5 <0.5 <0.5 <0.5
09/03/97
05/04/98
11/02/98 0.5 <0.2 <0.2 <0.2
04/26/99 0.6 B 0.2 B 0.3 B 0.3 B d,i
11/22/99 0.3 B 0.3 B <0.2 <0.2 i
05/23/00 0.5 J <0.2 0.6 J 0.4 J 0.7 J <0.2 <0.2 d,cc
11/29/00 <0.2 <0.2 0.4 J <0.2 1.0 J <0.2 <0.2 d
06/05/01 <0.2 <0.2 <0.2 <0.2 1.0 <0.2 <0.2
11/13/01
06/04/02 <0.2 <0.2 <0.2 <0.2 1.4 <0.2 <0.2
03/12/03 <0.2 <0.2 <0.2 <0.2 1.0 <0.2 <0.2
06/18/03 <0.2 <0.2 <0.2 <0.2 0.6 <0.2 <0.2
12/08/03 <0.2 <0.2 <0.2 <0.2 0.5 <0.2 <0.2
06/22/04 <0.2 <0.2 <0.2 <0.2 1.1 <0.2 <0.2
11/30/04 <0.2 <0.2 <0.2 <0.2 1.1 <0.2 <0.2
06/01/05 <0.2 <0.2 <0.2 <0.2 0.6 <0.2 <0.2
11/02/05 <0.2 <0.2 <0.2 <0.2 3.6 <0.2 <0.2
05/22/06 <0.2 <0.2 <0.2 <0.2 1.9 <0.2 <0.2
11/27/06 <0.2 <0.2 <0.2 <0.2 1.48 0.48 <0.2
06/12/07 <0.01 <0.01 <0.01 <0.01 1.8 0.33 <0.01 0.74 0.01 0.2
12/12/07 <0.01 0.04 JB <0.01 <0.01 3.2 0.201 B 0.06 JB 0.01 0.2 i
03/06/08 0.01 0.2
06/12/08 0.14 JB 0.17 JB 0.08 JB 0.09 JB 1.8 0.37 B 0.16 JB 0.6 B 0.01 0.2 f
11/05/08 0.18 JB 0.08 JB <0.01 <0.01 2.2 0.12 JB <0.01 0.6 B 0.12 JB 0.01 0.2 f, i
05/19/09 <0.05 <0.05 <0.05 <0.05 2.16 0.81 <0.05 0.06 J <0.05 0.05 0.2
11/18/09 <0.054 <0.054 <0.054 <0.054 3.3 1.59 <0.054 0.482 <0.054 0.054 0.2
06/21/10 <0.17 <0.17 <0.17 <0.17 1.9 2.7 <0.17 <0.17 <0.17 0.17 0.2
11/18/10 <0.17 <0.17 <0.17 <0.17 3.13 1.64 <0.17 0.755 <0.17 0.17 0.2
injection event (03-29-11)05/23/11 <0.17 <0.17 <0.17 <0.17 1.77 1.52 <0.17 0.344 <0.17 0.17 0.2
08/23/11 2.23 2.37 1.48 <0.17 0.17 0.2
injection event (09-28-11)11/15/11 <0.17 <0.17 <0.17 <0.17 2.95 0.748 <0.17 1.74 <0.17 0.17 0.2
02/21/12
injection event (04-14-12)06/05/12 <0.17 <0.17 <0.17 <0.17 0.981 0.407 <0.17 0.652 <0.17 0.17 0.2
10/09/12
injection event (09-13-12)11/12/12 <0.17 <0.17 <0.17 <0.17 7.8 1.34 <0.17 3.07 <0.17 0.17 0.2
02/18/13
05/13/13 <0.17 <0.17 <0.17 <0.17 2.1 1.25 <0.17 0.417 <0.17 0.17 0.2
11/11/13 <0.170 <0.170 <0.170 <0.170 3.04 1.01 <0.170 2.57 <0.170 0.170 0.2
02/10/14 2.20 1.49 0.919 <0.170 0.170 0.2
05/12/14 <0.170 <0.170 <0.170 <0.170 1.39 1.31 <0.170 0.913 <0.170 0.170 0.2
08/18/14 1.25 2.33 3.61 <0.170 0.170 0.2
11/11/14 <0.170 <0.170 <0.170 <0.170 1.51 0.618 <0.170 4.25 <0.170 0.170 0.2
02/23/15 2.53 2.74 3.71 <0.170 0.170 0.2
05/12/15 <0.170 <0.170 <0.170 <0.170 0.960 1.69 <0.170 1.33 <0.170 0.170 0.2
08/24/15 1.59 4.22 4.57 <0.170 0.170 0.2
11/10/15 <0.170 <0.170 <0.170 <0.170 1.32 2.21 3.67 <0.170 0.170 0.2
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
LOD SWSLMW-21S MW-22 MW-24
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
MW-17 QA/QCMW-20
HISTORY OF CHEMICAL ANALYSIS
MW-23MW-21DSample Date MW-15 MW-16Constituent
nickel 04/17/90 <50 <50 <50 <50 <50MCL = 07/11/91 <50 <50 <50 <50 <50
FBAC = 50 (SWSL)05/28/92 <50 <50 <50 <50 <50 <50 <50
NCGQS = 100 (2L Std)06/30/93 <50 <50 <50 <50 <50 <50
11/04/94 <50 <50 <50 <50 <50 <50
12/20/94 <50 <50 <50 <50 <50 <50
02/02/95 <50 <50 <50 <50 <50 <50 <50 <50
03/13/95 <50 <50 <50 <50 <50 <50 <50 <50
11/15/95 <50 <50 <50 <50 <50 <50 <50 <50
07/25/96 <50 <50 <50 <50 <50 <50
02/25/97 <50 <50 <50 <50 65 J <50 <50 <50 i,t,d,sd
09/03/97 <50 <50 <50 <50 <50
05/04/98 <50 <50 <50 <50 <50 <50 <50 <50
11/02/98 <50 <50 <50 <50 <50
04/26/99 <50 <50 <50 <50 <50
11/22/99 <50 <50 <50 <50 <50
05/23/00 <50 <50 <50 <50 <50 <50 <50 <50 q
11/29/00 <50 <50 <50 <50 <50
06/05/01 <50 <50 <50 <50 <50 <50 <50 i
11/13/01 <50 <50 <50
06/04/02 <50 <50 <50
03/12/03 <50 <50 <50 <50
06/18/03 <50 <50 <50 <50 <50
12/08/03 <50 <50 <50
06/22/04 <50 <50 <50
11/30/04 <50 <50 <50
06/01/05 <50 <50 <50
11/02/05 <50 <50 <50
05/22/06 <50 <50 <50
11/27/06 <50 <50 <50
06/12/07 1 J 38.3 J 6.3 J 1.6 J 0.6 50
12/12/07 2.6 JB 8.2 J 2.4 JB 0.6 50 i
03/06/08 6.98 J 0.6 50
06/12/08 <0.6 3.8 J 5.6 J 7.9 J 6.6 J 0.8 J 0.6 50
09/20/08 0.6 50
11/05/08 9.2 J 8.8 J 0.7 JB 15.9 J 6.7 J 2.4 JB 0.6 50 f
05/19/09 <0.6 3.2 J <0.6 12.1 J 5.3 J 2.5 J 0.6 50
11/18/09 <1.8 <1.8 <1.8 3.62 J 6.23 J <1.8 1.8 50
06/21/10 <1.8 <1.8 <1.8 10.6 J 4.71 J <1.8 1.8 50
11/18/10 <1.8 2.72 J <1.8 1.82 J 5.77 J <1.8 1.8 50
05/23/11 <1.8 1.81 J <1.8 23.8 J 6.32 J <1.8 1.8 50
11/15/11 <1.8 <1.8 2.44 J 6.89 J <1.8 1.8 50
06/05/12 <1.8 <1.8 10.7 J 7.24 J <1.8 1.8 50
11/12/12 <1.8 <1.8 17.4 J 5.24 J <1.8 1.8 50
05/13/13 <1.8 <1.8 21.1 J 4.39 J 3.3 J 1.8 50 i
11/11/13 <1.80 <1.80 33.8 J 8.68 J 2.26 J 1.80 50
05/12/14 <1.80 <1.80 19.3 J 5.28 J 3.55 J 1.80 50
11/11/14 <1.80 <1.80 5.27 J 7.34 J 1.93 J 1.80 50
02/23/15
05/12/15 <1.80 <1.80 11.7 J 7.50 J 5.30 J 1.80 50
08/24/15
11/10/15 <1.80 <1.80 3.32 J 7.04 J <1.8 1.80 50
SWSLLOD
INORGANIC CONSTITUENTS: TOTAL METALS
HISTORY OF CHEMICAL ANALYSIS
PROJECT: GROUNDWATER MONITORING PROGRAM
LOCATION: CHAPEL HILL, NORTH CAROLINA
MW-6 MW-7ConstituentSample Date MW-1
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW-14A MW-14B QA/QCMW-13MW-7RMW-5MW-4 MW-6R
nickel 04/17/90 <50 <50MCL = 07/11/91 <50 <50
FBAC = 50 (SWSL)05/28/92 <50 <50 <50
NCGQS = 100 (2L Std)06/30/93 <50 <50 <50
11/04/94 <50 <50 <50 <50
12/20/94 <50 <50 <50 <50
02/02/95 <50 <50 <50 <50
03/13/95 <50 <50 <50 <50
11/15/95 <50 <50 <50 <50
07/25/96 <50 <50 <50 <50
02/25/97 <50 <50 <50 <50 i,t,d,sd
09/03/97 <50 <50 <50 <50
05/04/98 <50 <50 <50 <50
11/02/98 <50 <50 <50 <50
04/26/99 <50 <50 <50 <50
11/22/99 <50 <50 <50 <50
05/23/00 <50 <50 <50 <50 111 J <50 <50 q
11/29/00 <50 <50 <50 <50 <50 <50 <50
06/05/01 <50 <50 <50 <50 <50 <50 <50 i
11/13/01 <50 <50 <50 <50 <50 <50 <50
06/04/02 <50 <50 <50 <50 <50 <50 <50
03/12/03 <50 <50 <50 <50 <50 <50 <50
06/18/03 <50 <50 <50 <50 <50 <50 <50
12/08/03 <50 <50 <50 <50 <50 <50 <50
06/22/04 <50 <50 <50 <50 <50 <50 <50
11/30/04 <50 <50 <50 <50 <50 <50 <50
06/01/05 <50 <50 <50 <50 <50 <50 <50
11/02/05 <50 <50 <50 <50 <50 <50 <50
05/22/06 <50 <50 <50 <50 <50 <50 <50
11/27/06 <50 <50 <50 <50 <50 <50 <50
06/12/07 11.5 J 2.7 J 1.4 J 2.8 J <0.6 1.9 J 1.3 J 99.3 0.6 50
12/12/07 15.6 J 3.2 JB 2.9 JB 4.9 JB 6.6 J 2.4 JB 1.8 JB 0.6 50 i
03/06/08 0.6 50
06/12/08 8.5 J 1.6 J 1.4 J 2.9 J <0.6 1.2 J 1.8 J <0.6 110 R 0.6 50
09/20/08 3.1 J 0.6 50
11/05/08 8.1 J 1.4 JB 2.2 JB 10.6 J <0.6 2.4 JB 1.8 JB <0.6 1 JB 0.6 50 f
05/19/09 14.6 J 4.2 J 4.5 J 14.5 J 0.6 J 3.2 J 2.2 J 0.7 J 1.2 J 0.6 50
11/18/09 7.38 J 1.92 J 2.55 J 4.74 J <1.8 3.6 J <1.8 <1.8 <1.8 1.8 50
06/21/10 6.34 J <1.8 1.9 J <1.8 <1.8 4.05 J <1.8 1.81 J <1.8 1.8 50
11/18/10 8.17 J 2.04 J 2.53 J 2.13 J <1.8 <1.8 <1.8 <1.8 2.54 J 1.8 50
05/23/11 10.5 J 2.69 J 3.61 J <1.8 <1.8 2.07 J <1.8 <1.8 <1.8 1.8 50
11/15/11 12.8 J 3.13 J 3.83 J 4.89 J <1.8 1.95 J <1.8 <1.8 <1.8 1.8 50
06/05/12 11.8 J 3.99 J 4.8 J <1.8 <1.8 <1.8 <1.8 <1.8 3.06 J 1.8 50
11/12/12 8.86 J 2.02 J 3.18 J <1.8 <1.8 <1.8 <1.8 <1.8 3.44 J 1.8 50
05/13/13 12.3 J 2.7 JB <1.8 <1.8 <1.8 <1.8 <1.8 <1.8 1.86 J 1.8 50 i
11/11/13 12.3 J 1.91 J 4.25 J <1.80 <1.80 <1.80 <1.80 <1.80 <1.80 1.80 50
05/12/14 17.7 J 2.90 J 3.31 J <1.80 <1.80 <1.80 <1.80 <1.80 <1.80 1.80 50
11/11/14 14.1 J 1.94 J 3.46 J <3.60 <1.80 <1.80 <1.80 <1.80 <1.80 1.80/3.60 50
02/23/15
05/12/15 20.9 J 5.52 J 3.38 J <1.80 <1.80 1.86 J <1.80 <1.80 <1.80 1.80 50
08/24/15
11/10/15 13.5 J 2.85 J <1.80 <1.80 <1.80 <1.80 <1.80 <1.80 <1.80 1.80 50
MW-23
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW-17 QA/QCMW-20Sample Date MW-15 MW-16 MW-24MW-21D MW-21S MW-22Constituent LOD SWSL
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
selenium 04/17/90
MCL = 50 07/11/91
FBAC = 10 (SWSL)05/28/92
NCGQS = 20 (2L Std)06/30/93
2L Std = 50 (pre- Jan. 2010)11/04/94
2L Std = 20 (Jan. 2010)12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/98
04/26/99
11/22/99
05/23/00
11/29/00
06/05/01
11/13/01
06/04/02
03/12/03
06/18/03
12/08/03
06/22/04
11/30/04
06/01/05
11/02/05
05/22/06
11/27/06
06/12/07
12/12/07 <6.3 <6.3 <6.3 6.3 10
03/06/08 <6.3 6.3 10
06/12/08 <6.3 <6.3 <6.3 <6.3 <6.3 <6.3 6.3 10
11/05/08 <6.3 <6.3 <6.3 <6.3 <6.3 <6.3 6.3 10 i
05/19/09 <3.4 <3.4 3.5 J <3.4 5.6 J <3.4 3.4 10
11/18/09 <2.7 <2.7 <2.7 <2.7 <2.7 <2.7 2.7 10
06/21/10 <0.83 <0.83 <0.83 1.2 J 11.3 9.8 J 0.83 10
11/18/10 <2.7 10.9 B <2.7 <2.7 3.24 JB <2.7 2.7 10 i
05/23/11 <0.83 <0.83 2.11 J 4.56 J 14.4 10.8 0.83 10
11/15/11 <2.7 <2.7 <2.7 <2.7 <2.7 2.7 10 i
06/05/12 <0.83 <0.83 <0.83 <0.83 <0.83 0.83 10
11/12/12 <0.83 <0.83 <0.83 <0.83 <0.83 0.83 10
05/13/13 <0.91 1.05 J <0.91 <0.91 <0.91 0.91 10
11/11/13 <0.910 <0.910 <0.910 <0.910 <0.910 0.910 10
05/12/14 <0.910 <0.910 <0.910 <0.910 <0.910 0.910 10
11/11/14 <0.910 <0.910 <0.910 <0.910 <0.910 0.910 10
02/23/15
05/12/15 <0.910 <0.910 <0.910 <0.910 <0.910 0.910 10
08/24/15
11/10/15 <0.910 <0.910 <0.910 <0.910 <0.910 0.910 10
MW-14B LOD SWSL QA/QCSample Date MW-1 MW-4 MW-5 MW-6 MW-7 MW-7R MW-13 MW-14A
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
INORGANIC CONSTITUENTS: TOTAL METALS
Constituent
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
MW-6R
selenium 04/17/90
MCL = 50 07/11/91
FBAC = 10 (SWSL)05/28/92
NCGQS = 20 (2L Std)06/30/93
2L Std = 50 (pre- Jan. 2010)11/04/94
2L Std = 20 (Jan. 2010)12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/98
04/26/99
11/22/99
05/23/00
11/29/00
06/05/01
11/13/01
06/04/02
03/12/03
06/18/03
12/08/03
06/22/04
11/30/04
06/01/05
11/02/05
05/22/06
11/27/06
06/12/07
12/12/07 6.7 J <6.3 8.5 J <6.3 <6.3 <6.3 <6.3 6.3 10
03/06/08 6.3 10
06/12/08 <6.3 <6.3 6.5 J <6.3 <6.3 <6.3 <6.3 <6.3 <6.3 6.3 10
11/05/08 <6.3 <6.3 <6.3 <6.3 <6.3 <6.3 <6.3 <6.3 6.4 JB 6.3 10 i
05/19/09 <3.4 <3.4 <3.4 <3.4 3.8 J <3.4 <3.4 <3.4 4.4 J 3.4 10
11/18/09 <2.7 <2.7 <2.7 <2.7 <2.7 <2.7 <2.7 <2.7 <2.7 2.7 10
06/21/10 10.2 2.56 J 6.3 J 34.2 3.74 J 3.1 J 4.74 J 2.65 J 3.85 J 0.83 10
11/18/10 7.14 JB <2.7 <2.7 8.83 JB <2.7 <2.7 <2.7 <2.7 <2.7 2.7 10 i
05/23/11 10.3 3.99 J 8.33 J 37.6 3.33 J 2.78 J 6.24 J 3.34 J 3.92 J 0.83 10
11/15/11 <2.7 <2.7 <2.7 <2.7 <2.7 <2.7 <2.7 <2.7 <2.7 2.7 10 i
06/05/12 <0.83 <0.83 <0.83 1.02 J <0.83 0.84 J <0.83 <0.83 <0.83 0.83 10
11/12/12 <0.83 <0.83 <0.83 <0.83 1.6 J 4.93 J <0.83 <0.83 <0.83 0.83 10
05/13/13 <0.91 <0.91 <0.91 0.961 J <0.91 6.35 J <0.91 <0.91 <0.91 0.91 10
11/11/13 <0.910 <0.910 <0.910 0.924 J <0.910 5.26 J <0.910 <0.910 <0.910 0.910 10
05/12/14 <0.910 <0.910 <0.910 <0.910 <0.910 4.10 J <0.910 <0.910 <0.910 0.910 10
11/11/14 <0.910 <0.910 <0.910 <0.910 <0.910 2.95 J <0.910 <0.910 <0.910 0.910 10
02/23/15
05/12/15 <0.910 <0.910 <0.910 <0.910 <0.910 2.42 J <0.910 <0.910 <0.910 0.910 10
08/24/15
11/10/15 <0.910 <0.910 <0.910 1.38 J <0.910 3.58 J <0.910 <0.910 <0.910 0.910 10
Constituent Sample Date MW-15 MW-16 MW-17
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
INORGANIC CONSTITUENTS: TOTAL METALS
SWSL QA/QCMW-20 MW-21D MW-21S MW-22 MW-23 LOD
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
MW-24
silver 04/17/90MCL = 07/11/91
FBAC = 10 (SWSL)05/28/92
NCGQS = 20 (2L Std)06/30/93
2L Std = 17.5 (pre- Jan. 2010)11/04/94
2L Std = 20 (Jan. 2010)12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/98
04/26/99
11/22/99
05/23/00
11/29/00 <10 <10 <10 <10 <10 i,t,f
06/05/01 <10 <10 <10 <10 <10 <10 i,t,f
11/13/01 <10 <10 <10 <10 t,f
06/04/02 <10 <10 <10
03/12/03 <10 <10 <10 <10
06/18/03 <10 <10 <10 <10 <10
12/08/03 <10 <10 <10
06/22/04 <10 <10 <10
11/30/04 <10 <10 <10
06/01/05 <10 <10 <10
11/02/05 <10 <10 <10
05/22/06 <10 <10 <10
11/27/06 <10 <10 <10
06/12/07 <1.1 <1.1 <1.1 <1.1 1.1 10 cc
12/12/07 <1.1 2.6 J 10 1.1 10
03/06/08 <1.1 1.1 10
06/12/08 <1.1 <1.1 <1.1 <1.1 2.6 JB <1.1 1.1 10 t, i
11/05/08 <1.1 <1.1 <1.1 <1.1 <1.1 10 JB 1.1 10 i
05/19/09 <1 2 J <1 <1 1.1 J 1.4 J 1 10
11/18/09 <1.9 2.68 J <1.9 <1.9 2.89 J <1.9 1.9 10
06/21/10 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 1.9 10
11/18/10 <1.9 5.16 J <1.9 <1.9 3.61 J 4.16 J 1.9 10
05/23/11 <1.9 3.42 J <1.9 <1.9 2.03 J 2.92 J 1.9 10
11/15/11 <1.9 <1.9 <1.9 <1.9 <1.9 1.9 10
06/05/12 <1.9 <1.9 <1.9 2.98 J 2.34 J 1.9 10
11/12/12 <1.9 <1.9 <1.9 <1.9 <1.9 1.9 10
05/13/13 <1.9 <1.9 <1.9 2.27 J <1.9 1.9 10
11/11/13 <1.90 <1.90 <1.90 2.32 J <1.90 1.90 10
05/12/14 <1.90 <1.90 <1.90 <1.90 <1.90 1.90 10
11/11/14 1.96 JB 2.01 JB 2.08 JB 3.91 JB 2.18 JB 1.90 10 i
02/23/15
05/12/15 <1.90 1.94 J 2.90 J 4.54 J <1.90 1.90 10
08/24/15
11/10/15 <1.90 <1.90 3.52 J 5.58 J 4.38 J 1.90 10
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW-4
HISTORY OF CHEMICAL ANALYSIS
MW-14AMW-7
INORGANIC CONSTITUENTS: TOTAL METALS
MW-14B QA/QCMW-7R LOD SWSL
LOCATION: CHAPEL HILL, NORTH CAROLINA
MW-5 MW-6
PROJECT: GROUNDWATER MONITORING PROGRAM
Constituent Sample Date MW-1 MW-13MW-6R
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
silver 04/17/90MCL = 07/11/91
FBAC = 10 (SWSL)05/28/92
NCGQS = 20 (2L Std)06/30/93
2L Std = 17.5 (pre- Jan. 2010)11/04/94
2L Std = 20 (Jan. 2010)12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/98
04/26/99
11/22/99
05/23/00
11/29/00 <10 <10 <10 <10 <10 <10 11 B i,t,f
06/05/01 <10 <10 <10 <10 <10 <10 <10 i,t,f
11/13/01 <10 <10 <10 <10 <10 <10 <10 t,f
06/04/02 <10 <10 <10 <10 <10 <10 <10
03/12/03 <10 <10 <10 <10 <10 <10 <10
06/18/03 <10 <10 <10 <10 <10 <10 <10
12/08/03 <10 <10 <10 <10 <10 <10 <10
06/22/04 <10 <10 <10 <10 <10 <10 <10
11/30/04 <10 <10 <10 <10 <10 <10 <10
06/01/05 <10 <10 <10 <10 <10 <10 <10
11/02/05 <10 <10 <10 <10 <10 <10 <10
05/22/06 <10 <10 <10 <10 <10 <10 <10
11/27/06 <10 <10 <10 <10 <10 <10 <10
06/12/07 <1.1 <1.1 <1.1 <1.1 <1.1 <1.1 <1.1 <1.1 1.1 10 cc
12/12/07 1.3 J <1.1 1.2 J <1.1 <1.1 <1.1 <1.1 1.1 10
03/06/08 1.1 10
06/12/08 <1.1 <1.1 <1.1 <1.1 <1.1 <1.1 <1.1 <1.1 <1.1 1.1 10 t, i
11/05/08 <1.1 <1.1 <1.1 <1.1 <1.1 <1.1 <1.1 <1.1 <1.1 1.1 10 i
05/19/09 2.8 J <1 1 J <1 <1 <1 <1 <1 <1 1 10
11/18/09 4.6 J <1.9 2.7 J <1.9 2.37 J 2.39 J 2.79 J 1.91 J 2.23 J 1.9 10
06/21/10 <1.9 <1.9 <1.9 3.65 J <1.9 <1.9 <1.9 <1.9 <1.9 1.9 10
11/18/10 4.12 J <1.9 2.74 J 5.5 J 1.92 J <1.9 2.47 J <1.9 2.02 J 1.9 10
05/23/11 3.86 J <1.9 <1.9 2.96 J <1.9 <1.9 <1.9 <1.9 <1.9 1.9 10
11/15/11 2.44 J <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 1.9 10
06/05/12 3.77 J <1.9 2.93 J <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 1.9 10
11/12/12 2.29 J <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 1.9 10
05/13/13 2.79 J <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 1.9 10
11/11/13 2.40 J <1.90 <1.90 <1.90 <1.90 <1.90 <1.90 <1.90 <1.90 1.90 10
05/12/14 <1.90 <1.90 <1.90 <1.90 <1.90 <1.90 <1.90 <1.90 <1.90 1.90 10
11/11/14 4.31 JB 2.10 JB 2.40 JB <3.80 2.50 JB 2.41 JB 2.51 JB 2.16 JB 2.37 JB 1.90/3.80 10 i
02/23/15
05/12/15 4.64 J <1.90 3.21 J <1.90 3.67 J 3.41 J 3.63 J 2.83 J 2.98 J 1.90 10
08/24/15
11/10/15 5.91 J <1.90 3.85 J 3.69 J 3.84 J 3.51 J 4.29 J 3.62 J 3.30 J 1.90 10
MW-24 QA/QCMW-20 MW-21D MW-21S MW-22
INORGANIC CONSTITUENTS: TOTAL METALS
MW-17ConstituentSample Date MW-15 MW-16
LOCATION: CHAPEL HILL, NORTH CAROLINA
HISTORY OF CHEMICAL ANALYSIS
MW-23 LOD SWSL
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
sulfide 04/17/90
MCL = 07/11/91
FBAC = 1000 (SWSL)05/28/92
NCGQS =06/30/93
11/04/94
12/20/94
02/02/95
03/13/95
11/15/95
07/25/96 <196 <196
02/25/97 <196 980 J <196 588 J <196 <196 ms,d
09/03/97 1190 B 990 B <196 792 B <196 f,t
05/04/98 1600 <200 <200 400 <200 <200
11/02/98 200 J 3000 J <200 <200 <200 d
04/26/99 <200 <200 <200 <200 d
11/22/99 1160 J 1360 J 388 J 388 J 388 J d
05/23/00 <200 <200 558 <200 <200
11/29/00 576 768 <200 <200 <200
06/05/01 970 J 388 J <200 970 J 9700 J ms,d,lcs
11/13/01
06/04/02 <200 <200 <200 ms,lcs
03/12/03 600 J 400 J <200 2200 J ms
06/18/03 368 J 368 J 1290 J <200 3130 J ms,md
12/08/03 <200 <200 540
06/22/04 <200 <200 <200
10/30/04 <200 <200 <200
06/01/05 <200 <200 <200
11/02/05 380 <200 6460
05/22/06 768 2690 10200
11/27/06 <200 <200 <200
06/12/07 <200 <200 <200 <200 200 1000
12/12/07 <200 <200 3610 200 1000
03/06/08 736 J 200 1000
06/12/08 <200 <200 <200 <200 200 1000
11/05/08 <200 <200 <200 <200 970 J 200 1000
05/19/09 <100 <100 100 1000
11/18/09 <31 <31 <31 <31 <31 <31 31 1000
06/21/10 <31 <31 <31 <31 <31 36 J 31 1000
11/18/10 <10 <10 <10 <10 <10 <10 10 1000
05/23/11 <10 <10 <10 <10 <10 <10 10 1000
11/15/11 <10 <10 <10 <10 <10 10 1000
06/05/12 <10 <10 <10 <10 <10 10 1000
11/12/12 <10 <10 <10 <10 <10 10 1000
05/13/13 <10 <10 <10 <10 <10 10 100011/11/13 <10 <10 <10 <10 <10 10 100005/12/14 <10 <10 <10 <10 <10 10 1000
11/11/14 <10 <10 <10 <10 <10 10 1000
02/23/15
05/12/15 <10 <10 <10 <10 <10 10 1000
08/24/15
11/10/15 <10 <10 <10 <10 10 J 10 1000
Constituent Sample Date MW-1 SWSL
INORGANIC CONSTITUENTS: TOTAL METALS
MW-5 LODMW-4 MW-14A MW-14B QA/QC
HISTORY OF CHEMICAL ANALYSIS
MW-6 MW-7 MW-13MW-7R
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
MW-6R
sulfide 04/17/90
MCL = 07/11/91
FBAC = 1000 (SWSL)05/28/92
NCGQS =06/30/93
11/04/94
12/20/94
02/02/95
03/13/95
11/15/95
07/25/96 <196 <196
02/25/97 <196 <196 <196 3140 J ms,d
09/03/97 <196 2180 B 792 B 3760 B f,t
05/04/98 <200 <200 <200 14400
11/02/98 <200 <200 <200 2800 J d
04/26/99 <200 588 <200 21200 d
11/22/99 <200 <200 <200 12400 J d
05/23/00 <200 <200 372 22300 372 <200 <200
11/29/00 <200 <200 <200 1540 <200 384 <200
06/05/01 388 J 388 J <200 20200 J 582 J <200 <200 ms,d,lcs
11/13/01
06/04/02 <200 860 J <200 15200 J 570 J <200 960 J ms,lcs
03/12/03 <200 <200 <200 24800 J <200 600 J 400 J ms
06/18/03 <200 736 J <200 14200 J 736 J <200 920 J ms, md
12/08/03 <200 540 <200 23000 360 360 360
06/22/04 <200 352 <200 12700 <200 <200 <200
10/30/04 <200 <200 <200 23800 <200 <200 <200
06/01/05 <200 <200 <200 24500 564 <200 <200
11/02/05 <200 <200 34200 26600 570 760 570
05/22/06 <200 576 <200 26100 <200 576 <200
11/27/06 <200 <200 <200 313 <200 <200 <200
06/12/07 <200 <200 <200 28600 <200 <200 <200 <200 200 1000
12/12/07 <200 <200 <200 26100 <200 <200 <200 200 1000
03/06/08 200 1000
06/12/08 <200 <200 <200 25200 <200 <200 <200 <200 200 1000
11/05/08 <200 582 J <200 14700 <200 <200 2330 <200 <200 200 1000
05/19/09 <100 <100 <100 <100 100 1000
11/18/09 <31 <31 <31 <31 <31 <31 <31 <31 <31 31 1000
06/21/10 <31 <31 <31 <31 <31 <31 <31 <31 <31 31 1000
11/18/10 <10 <10 <10 <10 <10 <10 <10 <10 <10 10 1000
05/23/11 <10 <10 <10 <10 <10 <10 <10 <10 <10 10 1000
11/15/11 <10 <10 <10 <10 <10 <10 <10 <10 <10 10 1000
06/05/12 <10 <10 <10 <10 <10 <10 <10 <10 <10 10 1000
11/12/12 <10 <10 <10 <10 <10 <10 <10 <10 <10 10 1000
05/13/13 <10 <10 <10 <10 <10 <10 <10 <10 <10 10 100011/11/13 <10 <10 <10 <10 <10 <10 <10 <10 <10 10 100005/12/14 <10 <10 <10 <10 <10 <10 <10 <10 <10 10 1000
11/11/14 <10 <10 <10 <10 <10 <10 <10 <10 <10 10 1000
02/23/15
05/12/15 <10 <10 <10 <10 <10 <10 <10 <10 <10 10 1000
08/24/15
11/10/15 <10 <10 <10 <10 <10 <10 <10 <10 <10 10 1000
MW-21SSample Date QA/QCMW-20 MW-21D MW-22
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
Constituent MW-15 MW-16 LOD SWSLMW-17
INORGANIC CONSTITUENTS: TOTAL METALS
MW-23
HISTORY OF CHEMICAL ANALYSIS
MW-24
thallium 04/17/90
MCL = 2 07/11/91
FBAC = 5.5 (SWSL)05/28/92
NCGQS =0.2 (GWPS)06/30/93
11/04/94
12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/98
04/26/99
11/22/99
05/23/00
11/29/00
06/05/01
11/13/01
06/04/02
03/12/03
06/18/03
12/08/03
06/22/04
10/30/04
06/01/05
11/02/05
05/22/06
11/27/06
06/12/07 <2.7 <2.7 <2.7 <2.7 2.7 5.5
12/12/07 <2.7 <2.7 <2.7 2.7 5.5
03/06/08 <2.7 2.7 5.5
06/12/08 <2.7 <2.7 <2.7 <2.7 <2.7 <2.7 2.7 5.5
11/05/08 <2.7 <2.7 <2.7 <2.7 <2.7 <2.7 2.7 5.5 i
05/19/09 <0.036 0.061 JB <0.036 <0.036 <0.036 <0.036 0.036 5.5
11/18/09 0.26 J <0.11 <0.11 0.126 J 3 J 2.56 J 0.11 5.5
06/21/10 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 5.5
11/18/10 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 5.5
05/23/11 0.38 J 0.437 J 0.291 J 0.196 J <0.11 <0.11 0.11 5.5
11/15/11 0.129 J <0.11 <0.11 <0.11 <0.11 0.11 5.5
06/05/12 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 5.5
11/12/12 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 5.5
05/13/13 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 5.5
11/11/13 <0.110 <0.110 <0.110 0.155 J <0.110 0.110 5.5
05/12/14 <0.110 <0.110 <0.110 <0.110 <0.110 0.110 5.5
11/11/14 0.347 J <0.110 <0.110 <0.110 <0.110 0.110 5.5
02/23/15
05/12/15 <0.110 <0.110 <0.110 <0.110 <0.110 0.110 5.5
08/24/15
11/10/15 <0.110 <0.110 <0.110 <0.110 <0.110 0.110 5.5
SWSL QA/QC
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
MW-13 MW-14A MW-14B LODMW-5 MW-6 MW-7 MW-7RConstituentSample Date MW-1 MW-4
HISTORY OF CHEMICAL ANALYSIS
INORGANIC CONSTITUENTS: TOTAL METALS
LOCATION: CHAPEL HILL, NORTH CAROLINA
MW-6R
thallium 04/17/90
MCL = 2 07/11/91
FBAC = 5.5 (SWSL)05/28/92
NCGQS =0.2 (GWPS)06/30/93
11/04/94
12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/98
04/26/99
11/22/99
05/23/00
11/29/00
06/05/01
11/13/01
06/04/02
03/12/03
06/18/03
12/08/03
06/22/04
10/30/04
06/01/05
11/02/05
05/22/06
11/27/06
06/12/07 <2.7 4.7 J <2.7 <2.7 <2.7 <2.7 <2.7 <2.7 2.7 5.5
12/12/07 <2.7 <2.7 <2.7 <2.7 <2.7 3.1 J <2.7 2.7 5.5
03/06/08 2.7 5.5
06/12/08 <2.7 <2.7 <2.7 <2.7 <2.7 <2.7 <2.7 <2.7 <2.7 2.7 5.5
11/05/08 <2.7 <2.7 <2.7 <2.7 <2.7 <2.7 <2.7 <2.7 2.1 JB 2.7 5.5 i
05/19/09 <0.036 <0.036 <0.036 <0.036 <0.036 <0.036 <0.036 <0.036 <0.036 0.036 5.5
11/18/09 2.82 J <0.11 <0.11 <0.11 0.124 J 0.113 J <0.11 <0.11 0.129 J 0.11 5.5
06/21/10 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 5.5
11/18/10 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 5.5
05/23/11 <0.11 0.114 J 0.153 J <0.11 0.215 J 0.242 J <0.11 0.172 J 0.165 J 0.11 5.5
11/15/11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 5.5
06/05/12 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 5.5
11/12/12 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 5.5
05/13/13 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 5.5
11/11/13 <0.110 <0.110 <0.110 <0.110 <0.110 <0.110 <0.110 <0.110 <0.110 0.110 5.5
05/12/14 <0.110 <0.110 <0.110 <0.110 <0.110 <0.110 <0.110 <0.110 <0.110 0.110 5.5
11/11/14 <0.110 <0.110 <0.110 <0.110 <0.110 <0.110 <0.110 <0.110 <0.110 0.110 5.5
02/23/15
05/12/15 <0.110 <0.110 <0.110 0.114 J <0.110 <0.110 <0.110 <0.110 <0.110 0.110 5.5
08/24/15
11/10/15 <0.110 <0.110 <0.110 <0.110 <0.110 0.110 5.5
LOCATION: CHAPEL HILL, NORTH CAROLINA
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
MW-23 LOD SWSL QA/QCMW-21D MW-21S MW-22ConstituentSample Date MW-17 MW-20
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW-24MW-15 MW-16
tin 04/17/90MCL = 07/11/91
FBAC = 100 (SWSL)05/28/92
NCGQS =2000 (GWPS)06/30/93
GWPS = 2100 (pre-Oct. 2010)11/04/94
GWPS = 2000 (Oct. 2010)12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/98
04/26/99
11/22/99
05/23/00
11/29/00
06/05/01
11/13/01
06/04/02
03/12/03
06/18/03
12/08/03
06/22/04
10/30/04
06/01/05
11/02/05
05/22/06
11/27/06
06/12/07
12/12/07
03/06/08
06/12/08
11/05/08
05/19/09 1.1 J 3.1 J <1.1 1.1 100
11/18/09
06/21/10 5.32 J <2.1 <2.1 <2.1 3.6 J <2.1 2.1 100
11/18/10 <2.1 3.94 J <2.1 <2.1 3.19 J <2.1 2.1 100
05/23/11 2.1 J 4.74 J <2.1 2.1 100
11/15/11
06/05/12 2.97 J <2.1 <2.1 5.26 J <2.1 2.1 100
11/12/12
05/13/13 <2.1 <2.1 <2.1 4.66 J 3.22 J 2.1 100 i
11/11/13
05/12/14 <2.1 <2.1 <2.1 2.1 100 i
11/11/14
02/23/15
05/12/15 <2.40 <2.40 <2.40 2.40 100
08/24/15
11/10/15 <2.40 <2.40 <2.40 2.40 100
PROJECT: GROUNDWATER MONITORING PROGRAM
MW-7R MW-13 MW-14A MW-14B LOD SWSL QA/QC
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
HISTORY OF CHEMICAL ANALYSIS
INORGANIC CONSTITUENTS: TOTAL METALS
Constituent Sample Date MW-1 MW-4 MW-5 MW-6 MW-6R MW-7
tin 04/17/90MCL = 07/11/91
FBAC = 100 (SWSL)05/28/92
NCGQS =2000 (GWPS)06/30/93
GWPS = 2100 (pre-Oct. 2010)11/04/94
GWPS = 2000 (Oct. 2010)12/20/94
02/02/95
03/13/95
11/15/95
07/25/96
02/25/97
09/03/97
05/04/98
11/02/98
04/26/99
11/22/99
05/23/00
11/29/00
06/05/01
11/13/01
06/04/02
03/12/03
06/18/03
12/08/03
06/22/04
10/30/04
06/01/05
11/02/05
05/22/06
11/27/06
06/12/07
12/12/07
03/06/08
06/12/08
11/05/08
05/19/09 <1.1 <1.1 <1.1 2.2 J 1.1 100
11/18/09
06/21/10 2.42 J <2.1 <2.1 <2.1 4.61 J 4.76 J <2.1 <2.1 <2.1 2.1 100
11/18/10 2.52 J <2.1 4.04 J 2.23 J 3.42 J 3.11 J 3.46 J 3.68 J 2.62 J 2.1 100
05/23/11 2.71 J <2.1 2.81 J 2.33 J 2.1 100
11/15/11
06/05/12 4.65 J <2.1 4.17 J 4.44 J 2.1 100
11/12/12
05/13/13 3.36 J 3.68 JB <2.1 3.17 J 3.13 J 3.27 J 2.1 100 i
11/11/13
05/13/13 <2.1 <2.1 <2.1 <2.1 <2.1 <2.1 2.1 100
11/11/14
02/23/15
05/12/15 <2.40 <2.40 <2.40 <2.40 <2.40 <2.40 2.40 100
08/24/15
11/10/15 <2.40 <2.40 <2.40 <2.40 <2.40 <2.40 2.40 100
MW-21S MW-22 MW-23 MW-24 LOD SWSL QA/QC
PROJECT: GROUNDWATER MONITORING PROGRAM
LOCATION: CHAPEL HILL, NORTH CAROLINA
MW-16 MW-17ConstituentSample Date MW-15
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
MW-20 MW-21D
HISTORY OF CHEMICAL ANALYSIS
INORGANIC CONSTITUENTS: TOTAL METALS
vanadium 04/17/90MCL = 07/11/91
FBAC = 25 (SWSL)05/28/92
NCGQS = 0.3 (GWPS)06/30/93
GWPS = 3.5 (pre-Oct. 2010)11/04/94 <40 <40 <40 <40 <40 <40
GWPS = 0.3 (Oct. 2010)12/20/94 <40 <40 <40 <40 <40 <40
02/02/95 <40 <40 <40 <40 <40 <40
03/13/95 <40 <40 <40 <40 <40 <40 <40 <40
11/15/95 <40 <40 <40 <40 63 <40 <40 <40
07/25/96 <40 <40 <40 <40 <40 <40 t,sd
02/25/97 <40 <40 <40 <40 110 <40 <40 <40
09/03/97 <40 <40 <40 <40 <40
05/04/98 <40 <40 <40 <40 <40 <40 <40 <40
11/02/98 <40 <40 <40 <40 <40
04/26/99 <40 <40 <40 <40 <40
11/22/99 <40 <40 <40 <40 <40
05/23/00 <40 <40 <40 <40 <40 <40 <40 <40
11/29/00 <40 <40 <40 <40 <40
06/05/01 <40 <40 <40 <40 <40 <40 <40 <40
11/13/01 <40 <40 <40
06/04/02 <40 <40 <40
03/12/03 <40 <40 <40 <40
06/18/03 <40 <40 <40 <40 <40
12/08/03 <40 <40 <40
06/22/04 <40 <40 <40
10/30/04 <40 <40 <40
06/01/05 <40 <40 <40
11/02/05 <40 <40 <40
05/22/06 <40 <40 <40
11/27/06 <40 <40 <40
06/12/07 1.5 J 42.8 <0.4 <0.4 0.4 25
12/12/07 <0.4 <0.4 3 J 0.4 25
03/06/08 5.5 J 0.4 25
06/12/08 2.1 JB 5.2 J 5 J <0.4 <0.4 5.7 J 0.4 25 t, i
09/20/08 0.4 25
11/05/08 1.2 JB 2.4 JB 5.8 JB <0.4 <0.4 2.8 JB 0.4 25 f
05/19/09 2.9 J <0.7 1.5 J <0.7 <0.7 1 J 0.7 25
11/18/09 2.24 J <1.4 <1.4 <1.4 <1.4 <1.4 1.4 25
06/21/10 22.3 J 1.82 J 7.11 J <1.4 <1.4 <1.4 1.4 25
11/18/10 7.64 J <1.4 <1.4 <1.4 <1.4 <1.4 1.4 25
05/23/11 6.8 J 2.44 J <1.4 <1.4 <1.4 <1.4 1.4 25
11/15/11 3.23 J <1.4 <1.4 <1.4 <1.4 1.4 25
06/05/12 10.4 J <1.4 <1.4 <1.4 <1.4 1.4 25
11/12/12 1.76 J <1.4 <1.4 <1.4 <1.4 1.4 25
05/13/13 1.81 J <1.4 <1.4 <1.4 2.62 J 1.4 25 i
11/11/13 <1.40 <1.40 <1.40 <1.40 <1.40 1.40 25
05/12/14 <1.40 <1.40 <1.40 <1.40 <1.40 1.40 25
11/11/14 <1.40 <1.40 <1.40 <1.40 <1.40 1.40 25
02/23/15
05/12/15 <1.40 <1.40 <1.40 <1.40 <1.40 1.40 25
08/24/15
11/10/15 1.60 J <1.40 <1.40 <1.40 <1.40 1.40 25
INORGANIC CONSTITUENTS: TOTAL METALS
HISTORY OF CHEMICAL ANALYSIS
Constituent Sample Date MW-1 MW-4 MW-5 MW-6 MW-7RMW-7 MW-13 MW-14A MW-14B LOD SWSL
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
QA/QCMW-6R
vanadium 04/17/90MCL = 07/11/91
FBAC = 25 (SWSL)05/28/92
NCGQS = 0.3 (GWPS)06/30/93
GWPS = 3.5 (pre-Oct. 2010)11/04/94 <40 <40 <40 <40
GWPS = 0.3 (Oct. 2010)12/20/94 <40 <40 <40 <40
02/02/95 <40 <40 <40 <40
03/13/95 <40 <40 <40 <40
11/15/95 <40 <40 <40 <40
07/25/96 <40 <40 <40 <40 t,sd
02/25/97 <40 <40 <40 <40
09/03/97 <40 <40 <40 <40
05/04/98 <40 <40 <40 <40
11/02/98 <40 <40 <40 <40
04/26/99 <40 <40 <40 <40
11/22/99 <40 <40 <40 <40
05/23/00 <40 <40 <40 <40 <40 <40 <40
11/29/00 <40 <40 <40 <40 <40 <40 <40
06/05/01 <40 <40 <40 <40 <40 <40 <40
11/13/01 <40 <40 <40 57 <40 <40 <40
06/04/02 <40 <40 <40 50 <40 <40 <40
03/12/03 <40 <40 <40 52 <40 <40 <40
06/18/03 <40 <40 <40 <40 <40 <40 <40
12/08/03 <40 <40 <40 41 <40 <40 <40
06/22/04 <40 <40 <40 <40 <40 <40 <40
10/30/04 <40 <40 <40 <40 <40 <40 <40
06/01/05 <40 <40 <40 <40 <40 <40 <40
11/02/05 <40 <40 <40 <40 <40 <40 <40
05/22/06 <40 <40 <40 <40 <40 <40 <40
11/27/06 <40 <40 <40 <40 <40 <40 <40
06/12/07 <0.4 <0.4 <0.4 <0.4 1 J 0.8 J 0.6 J 83.4 R 0.4 25
12/12/07 <0.4 <0.4 <0.4 15.4 J <0.4 <0.4 <0.4 0.4 25
03/06/08 0.4 25
06/12/08 1.5 JB 1.4 JB 1 JB 18.8 J 1.7 JB 1.9 JB 3.3 JB 1.3 JB 85.7 R 0.4 25 t, i
09/20/08 3.8 J 0.4 25
11/05/08 <0.4 <0.4 <0.4 13.1 JB <0.4 <0.4 6.8 JB 1.3 JB 2.2 JB 0.4 25 f
05/19/09 <0.7 1.3 J <0.7 <0.7 2.1 J 9.6 J 1.2 J 2.6 J 2.8 J 0.7 25
11/18/09 <1.4 <1.4 <1.4 2.84 J <1.4 15.4 J <1.4 2.53 J 9.66 J 1.4 25
06/21/10 <1.4 <1.4 <1.4 <1.4 <1.4 8.92 J <1.4 4.09 J 2.72 J 1.4 25
11/18/10 <1.4 <1.4 <1.4 <1.4 <1.4 4.2 J <1.4 1.81 J 2.8 J 1.4 25
05/23/11 <1.4 <1.4 <1.4 1.62 J <1.4 9.97 J <1.4 2.04 J <1.4 1.4 25
11/15/11 <1.4 <1.4 <1.4 <1.4 2.03 J 6.3 J <1.4 <1.4 <1.4 1.4 25
06/05/12 <1.4 <1.4 <1.4 <1.4 <1.4 <1.4 <1.4 1.66 J 2.29 J 1.4 25
11/12/12 <1.4 <1.4 <1.4 <1.4 <1.4 1.93 J <1.4 <1.4 2.07 J 1.4 25
05/13/13 <1.4 <1.4 <1.4 10.3 J <1.4 <1.4 <1.4 <1.4 3.62 J 1.4 25 i
11/11/13 <1.40 <1.40 <1.40 5.09 J <1.40 <1.40 <1.40 <1.40 2.68 J 1.40 25
05/12/14 <1.40 2.39 J <1.40 <1.40 <1.40 1.85 J <1.40 2.25 J 1.80 J 1.40 25
11/11/14 <1.40 <1.40 <1.40 <2.80 <1.40 <1.40 <1.40 <1.40 <1.40 1.40/2.80 25
02/23/15
05/12/15 <1.40 1.81 J <1.40 <1.40 <1.40 <1.40 <1.40 <1.40 <1.40 1.40 25
08/24/15
11/10/15 <1.40 <1.40 <1.40 <1.40 <1.40 <1.40 <1.40 <1.40 <1.40 1.40 25
LODMW-23MW-16 MW-17ConstituentSample Date MW-15 SWSL
HISTORY OF CHEMICAL ANALYSIS
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
MW-24 QA/QCMW-20 MW-21D MW-21S MW-22
zinc 04/17/90 <10 49 22 <10 10MCL = 07/11/91 30 70 190 60 70
FBAC = 10 (SWSL)05/28/92 <20 <20 25 <20 <20 <20 <20 <20
NCGQS = 1000 (2L Std)06/30/93 <20 30 248 90 63 <20 24
2L Std = 1050 (pre- Jan. 2010)11/04/94 <50 <50 71 B <50 58 B 53 B i,f,sd
2L Std = 1000 (Jan. 2010)12/20/94 <50 70 B 61 B 51 B 52 B <50 i,f
02/02/95 55 B <50 <50.0 <50 <50 65 B i,f
03/13/95 <50 <50 89 B 72 B 53 B <50 <50 <50 i,t,f
11/15/95 <50 <50 139 J 63 B 131 J <50 <50 <50 ms,i
07/25/96 168 B 119 B 95 B 102 B 66 B 80 B i,t,f,ms
02/25/97 87 B 74 B 129 B 76 B 230 B 72 B <50 <50 i,t,f
09/03/97 <50 <50 <50 <50 <50 i,t,f,sd
05/04/98 85 B 424 B 57 B 61 B 92 B <50 <50 <50 f,t
11/02/98 <50 <50 <50 <50 <50 i,t,f,lcs
04/26/99 <50 <50 <50 <50 <50 i
11/22/99 <50 51 B <50 <50 <50 d,i,t,f,q
05/23/00 <50 54 B <50 <50 <50 <50 <50 <50 i,t,f,q
11/29/00 <50 <50 <50 <50 <50 t, f
06/05/01 <50 <50 75 B 73 B <50 <50 <50 i,t,f
11/13/01 51 B <50 <50 ms,t,f
06/04/02 60 B <50 <50 t
03/12/03 60 <50 <50 <50
06/18/03 155 B <50 <50 <50 <50 t
12/08/03 94 <50 <50
06/22/04 105 <50 <50
11/30/04 86 <50 <50
06/01/05 66 J <50 <50 cc
11/02/05 <50 <50 <50
05/22/06 <50 <50 <50
11/27/06 <50 <50 <50 i
06/12/07 28.1 B 134 10.2 B 15.3 B 2.7 10 t, f
12/12/07 20.9 B 13.5 B 12.2 B 2.7 10 i
03/06/08 56.2 2.7 10
06/12/08 <2.7 <2.7 44.5 B <2.7 <2.7 <2.7 2.7 10 i
11/05/08 8.1 JB 12.4 B 19.7 B <2.7 <2.7 <2.7 2.7 10 i
05/19/09 14.2 15.0 35.1 <3.4 4.4 J 12.9 3.4 10
11/18/09 11.1 11.6 26 11 6.98 J 5.5 J 3.8 10
06/21/10 82 9.32 J 99.2 7.19 J 7.49 J 11.9 3.8 10
11/18/10 26.6 4.21 J 32.3 <3.8 8.24 J 5.58 J 3.8 10
05/23/11 27.7 6.55 J 49.2 4.23 J 10.9 <3.8 3.8 10
11/15/11 13.8 40.9 <3.8 7.08 J 7.14 J 3.8 10
06/05/12 45.2 34.7 <3.8 4.01 J 6.92 J 3.8 10
11/12/12 17 12 <3.8 <3.8 7.13 J 3.8 10
05/13/13 8.63 J 58.4 <3.8 11.7 8.99 J 3.8 10
11/11/13 7.24 J 59.5 <3.80 8.98 J 15.9 3.80 10
05/12/14 7.44 J 57.8 <3.80 4.71 J 5.33 J 3.80 10
11/11/14 14.6 46.7 <3.80 6.07 J 4.01 J 3.80 10
02/23/15
05/12/15 9.30 J 42.5 <3.80 4.97 J <3.80 3.80 10
08/24/15
11/10/15 7.09 J 37.4 <3.80 <3.80 <3.80 3.80 10
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
INORGANIC CONSTITUENTS: TOTAL METALS
HISTORY OF CHEMICAL ANALYSIS
PROJECT: GROUNDWATER MONITORING PROGRAM
Constituent Sample Date MW-1 MW-4 MW-5 MW-6
LOCATION: CHAPEL HILL, NORTH CAROLINA
MW-7R LOD SWSLMW-7 MW-13 MW-14A MW-14B QA/QCMW-6R
zinc 04/17/90 <10 <10MCL = 07/11/91 <20 30
FBAC = 10 (SWSL)05/28/92 <20 <20 <20
NCGQS = 1000 (2L Std)06/30/93 21 <20 <20
2L Std = 1050 (pre- Jan. 2010)11/04/94 <50 <50 <50 54 B i,f,sd
2L Std = 1000 (Jan. 2010)12/20/94 <50 <50 <50 <50 i,f
02/02/95 <50 <50 <50 <50 i,f
03/13/95 <50 <50 <50 <50 i,t,f
11/15/95 <50 <50 <50 64 B ms,i
07/25/96 126 B 220 B 153 B 109 B i,t,f,ms
02/25/97 52 B 83 B <50 72 B i,t,f
09/03/97 72 B <50 137 B <50 i,t,f,sd
05/04/98 <50 <50 <50 <50 f,t
11/02/98 <50 <50 <50 <50 i,t,f,lcs
04/26/99 <50 <50 <50 <50 i
11/22/99 <50 <50 <50 61 B d,i,t,f,q
05/23/00 <50 <50 <50 <50 <50 <50 <50 i,tf,q
11/29/00 <50 <50 <50 <50 <50 <50 <50 t, f
06/05/01 <50 <50 53 B 55 B <50 <50 <50 i,t,f
11/13/01 <50 <50 <50 <50 <50 <50 <50 ms,t,f
06/04/02 <50 <50 <50 <50 <50 <50 <50 t
03/12/03 <50 <50 <50 <50 <50 <50 <50
06/18/03 <50 <50 <50 <50 <50 <50 <50 t
12/08/03 <50 <50 <50 <50 <50 <50 <50
06/22/04 <50 <50 <50 <50 <50 <50 <50
11/30/04 <50 <50 <50 <50 <50 <50 <50
06/01/05 <50 <50 <50 <50 <50 <50 <50 cc
11/02/05 <50 <50 <50 <50 <50 <50 <50
05/22/06 <50 <50 <50 <50 <50 <50 <50
11/27/06 <50 <50 <50 <50 <50 <50 <50 i
06/12/07 9.8 JB 20.5 B 17.6 B 35.5 B 9.1 JB 12.7 B 11.7 B 72.1 2.7 10 t, f
12/12/07 9 JB 16.5 B 11.1 B 17 B 20.2 B 13.3 B 24.6 B 2.7 10 i
03/06/08 2.7 10
06/12/08 <2.7 <2.7 <2.7 <2.7 <2.7 <2.7 <2.7 <2.7 50.7 B 2.7 10 i
11/05/08 <2.7 <2.7 <2.7 <2.7 <2.7 <2.7 <2.7 <2.7 10.9 B 2.7 10 i
05/19/09 <3.4 <3.4 <3.4 18.5 <3.4 3.4 J <3.4 <3.4 <3.4 3.4 10
11/18/09 <3.8 4.17 J <3.8 32.1 <3.8 5.93 J <3.8 <3.8 <3.8 3.8 10
06/21/10 <3.8 <3.8 <3.8 9.61 J 6.33 J 11.2 <3.8 17.8 24.2 3.8 10
11/18/10 <3.8 <3.8 13 21.2 <3.8 <3.8 <3.8 <3.8 5.08 J 3.8 10
05/23/11 <3.8 <3.8 <3.8 <3.8 <3.8 7.67 J <3.8 <3.8 4.88 J 3.8 10
11/15/11 <3.8 <3.8 <3.8 22.4 <3.8 5.07 J <3.8 <3.8 <3.8 3.8 10
06/05/12 <3.8 <3.8 <3.8 26.4 <3.8 <3.8 <3.8 <3.8 <3.8 3.8 10
11/12/12 <3.8 <3.8 <3.8 32.8 JD <3.8 <3.8 <3.8 <3.8 <3.8 3.8 10
05/13/13 4.32 J <3.8 <3.8 14 <3.8 <3.8 <3.8 <3.8 <3.8 3.8 10
11/11/13 <3.80 <3.80 <3.80 20.4 <3.80 49.2 <3.80 <3.80 4.06 J 3.80 10
05/12/14 <3.80 <3.80 <3.80 10.8 <3.80 <3.80 <3.80 <3.80 <3.80 3.80 10
11/11/14 5.60 J <3.80 5.75 J <7.60 <3.80 4.36 J <3.80 5.08 J 4.13 J 3.80/7.60 10
02/23/15
05/12/15 <3.80 4.40 J <3.80 <3.80 5.74 J 6.20 J <3.80 <3.80 <3.80 3.80 10
08/24/15
11/10/15 4.72 J <3.80 <3.80 6.78 J <3.80 <3.80 <3.80 <3.80 <3.80 3.80 10
INORGANIC CONSTITUENTS: TOTAL METALS
QA/QC
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
MW-20 MW-21D
HISTORY OF CHEMICAL ANALYSIS
LOD SWSLMW-22 MW-23Sample Date MW-15 MW-16 MW-17 MW-21SConstituent MW-24
All results in µg/l.
Upgradient wells not shaded.
Shaded cells indicate data not available.
Blue bolded cells indicate concentrations that exceeded the FBAC.
Red bolded cells indicate concentrations that exceeded the NCGQS.
Green bolded cells indicate concentrations that were >LOD but <SWSL.
i - found in instrument blank t – found in trip blank
f - found in field blank ic - initial calibration beyond limits
cc – continuing calibration beyond limits md - matrix spike duplicates beyond limits
ms – matrix spike beyond limits d - duplicate results beyond limits
ss – surrogate spikes beyond limits is - internal standard beyond limits
lcs - laboratory control sample beyond limits R - concentration deemed unreliable
B – concentration attributed to cross-contamination J - concentration deemed estimated
JD - MDL & MRL elevated due to matrix interference; concentration deemed estimated
♠ - additional Appendix 2 constituent - limits not established
FBAC - facility background NCGQS – groundwater standard, as established by NCDENR
SWSL - solid waste section limit, as established by NCDENR SPL – statistical prediction limit
GWPS - groundwater protection standard
43northOrg&Inorg.592
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
HISTORY OF CHEMICAL ANALYSIS
INORGANIC CONSTITUENTS: TOTAL METALS
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
BYPRODUCTS OF GROUNDWATER REMEDIATION

GRAPHS

0
20
40
60
80
100
120
140
160
co
n
c
e
n
t
r
a
t
i
o
n

(
p
p
b
)
date sampled
OCSWM North landfill -manganese (MW21S + MW-21D)
MW-21D MW-21S
injection event 1: 03-29-11
outliers removed
NCGQS = 50
injection event 4: 09-13-12
0
50
100
150
200
250
300
350
400
450
co
n
c
e
n
t
r
a
t
i
o
n

(
p
p
b
)
date sampled
OCSWM North landfill -manganese (MW23 + MW-24)
MW-23 MW-24
injection event 1: 03-29-11
NCGQS = 50
no trend through May 2013
injection event 4: 09-13-12
550
600
650
700
750
800
850
900
950
1000
1050
1100
1150
1200
1250
1300
1350
co
n
c
e
n
t
r
a
t
i
o
n

(
p
p
b
)
date sampled
OCSWM North landfill -potassium (MW21S + MW-21D)
MW-21D MW-21S
injection event 1: 03-29-11
outliers removed
injection event 4: 09-13-12
500
600
700
800
900
1000
1100
1200
1300
1400
1500
1600
co
n
c
e
n
t
r
a
t
i
o
n

(
p
p
b
)
date sampled
OCSWM North landfill -potassium (MW23 + MW-24)
MW-23 MW-24
injection event 1: 03-29-11
outliers removed
injection event 4: 09-13-12
TABLES

carbon dioxide 03/22/11 55,500 29,100 9,070 16,300 2,000
MCL =05/23/11 130,000 95,900 343,000 65,100 1,300
FBAC = 08/23/11 207,000 131,000 92,200 74,400 1,300
NCGQS = 11/15/11 204,000 123,000 114,000 89,800 1,300
06/05/12 195,000 70,900 34,200 78,600 270
11/12/12
05/13/13 212,000 112,000 46,700 87,800 690
11/11/13 203,000 109,000 87,600 75,500 690
02/10/14 189,000 116,000 60,800 71,100 690/6,900
05/12/14 122,000 86,800 56,100 77,600 690
08/18/14 151,000 104,000 127,000 70,500 210/1,050
11/11/14 215,000 150,000 178,000 91,300 210/440
02/23/15 177,000 145,000 110,000 53,300 210
05/12/15 152,000 B 85600 B 96,300 B 89,600 B 210
08/24/15 255,000 109,000 151,000 84,900 210/1,050
11/10/15 300,000 168,000 170,000 84,000 210/1,050
chloride 03/22/11 44,000 50,000 58,000 56,000 1,900
MCL =05/23/11 44,000 39,000 56,000 48,000 94
FBAC = 08/23/11 47,000 39,000 80,000 51,000 1,900
NCGQS = 250000 (2L Std)11/15/11 42,000 41,000 80,000 53,000 1,900
06/05/12 53,000 38,000 76,000 54,000 430
11/12/12 50,000 37,000 81,000 60,000 1,900
05/13/13 61,000 46,000 78,000 62,000 1,900
11/11/13 66,000 52,000 100,000 64,000 2,200
02/10/14 61,000 52,000 89,000 62,000 1,900
05/12/14 57,000 53,000 93,000 65,000 1,900
08/18/14 69,000 59,000 110,000 67,00 1,900
11/11/14 70,000 59,000 110,000 66,000 1,900
02/23/15 62,000 56,000 100,000 68,000 1,900
05/12/15 65,000 59,000 110,000 72,000 1,900
08/24/15 73,000 62,000 120,000 72,000 1,900
11/10/15 70,000 63,000 130,000 74,000 1,900
manganese 03/22/11 13.6 J 88.7 19.5 J 184 1.1
MCL =05/23/11 15.6 J 60.8 36.9 J 230 1.1
FBAC = 50 (SWSL)08/23/11 10.9 J 44.9 J 21.8 J 311 1.1
NCGQS = 50 (2L Std)11/15/11 44 J 22.4 J 97 287 1.1
SWSL = 50 06/05/12 17.8 J 33.3 J 112 405 1.1
11/12/12 317 11.1 J 267 382 1.1
05/13/13 103 143 50.6 150 1.1
11/11/13 38.4 J 80.7 69.5 89.1 1.10
02/10/14 10.4 19.9 46.3 51.7 1.10
05/12/14 130 101 36.6 J 37.0 J 1.10
08/18/14 12.8 62.9 51.6 28.7 1.10
11/11/14 23.0 J 66.2 53.9 20.5 J 1.10
02/23/15 14.3 J 51.5 29.7 J 37.6 J 1.10
05/12/15 18.7 J 666 70.8 27.6 J 1.10
11/10/15 13.7 J B 21.7 J B 40.5 J B 92.1 B 1.10
potassium 03/22/11 709 978 820 778 150
MCL =05/23/11 702 670 528 780 150
FBAC = 08/23/11 983 681 687 779 150
NCGQS = 11/15/11 691 833 1,300 774 150
06/05/12 770 798 718 872 150
11/12/12 779 869 1,560 833 150
05/13/13 647 665 536 651 150
11/11/13 698 782 814 593 150
02/10/14 735 874 684 762 150
05/12/14 554 607 525 541 150
08/18/14 1,020 1,300 1,150 784 150
11/11/14 900 932 1,150 696 150
02/23/15 873 895 991 855 150
05/12/15 844 833 807 745 150
08/24/15 864 824 1,130 783 150
11/10/15 786 762 1,440 1,060 150
All results in µg/l.
Shaded cells indicate data not available.
Blue bolded cells indicate concentrations that exceeded the FBAC.
Red bolded cells indicate concentrations that exceeded the NCGQS.
Green bolded cells indicate concentrations that were >LOD but <SWSL.
B – concentration attributed to cross-contamination
 - limits not established
FBAC - facility background NCGQS – groundwater standard, as established by NCDENRSWSL - solid waste section limit, as established by NCDENR
R00597 - 163
BYPRODUCTS OF GROUNDWATER REMEDIATION
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
Constituent Sample Date MW-15 MW-16 LOD
GWPS - groundwater protection standard
MW-21D MW-21S MW-23 MW-24
INDICATOR PARAMETERS

GRAPHS

5.0
5.5
6.0
6.5
7.0
7.5
8.0
st
a
n
d
a
r
d

u
n
i
t
s
date sampled
OCSWM North SLF -pH (MW-21S + MW-21D)
MW-21S MW-21D
injection event 1: 03-29-11 injection event 4: 09-13-12
R² = 0.6124
6.5
7.0
7.5
8.0
st
a
n
d
a
r
d

u
n
i
t
s
date sampled
OCSWM North SLF -pH (MW-23)
MW-23 Log. (MW-23)
outliers removed (Dixon's test)
injection event 1: 03-29-11 injection event 4: 09-13-12
0
50
100
150
200
250
300
350
400
450
me
V
date sampled
OCSWM North SLF -ORP (MW-21S + MW-21D)
MW-21S MW-21D
injection event 1: 03-29-11 injection event 4: 09-13-12
0
50
100
150
200
250
300
350
400
450
500
550
600
me
V
date sampled
OCSWM North SLF -ORP (MW-23)
MW-23
injection event 1: 03-29-11
injection event 4: 09-13-12
TABLES

pH (standard units)06/22/10 7.06 6.90 7.54 NM
11/19/10 7.15 6.19 6.21 NM
03/23/11 6.03 5.94 7.18 11.90
05/23/11 6.92 6.68 7.12 NM
08/23/11 5.25 5.38 5.32 NM
11/15/11 6.05 6.01 6.87 6.66 6.75 NM
02/21/12 7.00 6.79 6.97 NM
06/05/12 6.95 6.67 6.99 NM
11/12/12 6.96 6.47 6.70 NM
05/13/13 6.55 6.39 6.75 NM
11/11/13 6.17 6.19 7.02 6.71 6.88 6.97
02/10/14 6.79 6.71 7.12 7.10
05/12/14 5.70 6.04 6.48 6.68 6.94 6.98
08/18/14 6.75 5.89 6.56 6.86
11/11/14 6.06 6.09 6.78 6.59 6.74 6.87
02/23/15 6.24 6.48 6.74 6.91
05/12/15 6.80 6.16 7.19 7.08 8.01 7.79
08/24/15 6.72 6.56 6.74 6.86
11/10/15 7.13 7.17 6.92 6.74 6.87 7.03
average = 6.32 6.28 6.72 6.50 6.85 7.53
standard deviation = 0.54 0.44 0.46 0.40 0.53 1.56
ORP (meV)06/22/10 37.7 76.6 24.7 NM
11/19/10 41.9 92.5 28.0 NM
03/23/11 228.0 209.0 71.0 106.0
05/23/11 62.1 45.2 14.0 NM
08/23/11 64.0 123.0 76.1 NM
11/15/11 25.7 68.9 124.0 119.4 431.0 NM
02/21/12 87.0 70.0 69.1 NM
06/05/12 66.8 84.4 498.0 NM
11/12/12 52.7 424.0 548.8 NM
05/13/13 151.0 217.0 198.0 NM
11/11/13 11.1 90.0 77.2 134.6 130.6 112.6
02/10/14 123.3 82.0 100.0 104.5
05/12/14 53.0 46.0 69.0 45.0 64.2 51.2
08/18/14 94.2 112.3 106.6 52.5
11/11/14 28.6 83.3 76.0 88.3 135.4 78.6
02/23/15 98.1 66.6 84.7 50.4
05/12/15 47.3 53.3 74.6 62.2 114.8 67.2
08/24/15 19.6 13.0 16.3 7.0
11/10/15 -159.9 -159.0 -118.8 -162.6 -108.3 -128.7
average = 1.0 30.4 75.2 100.1 137.0 50.1
standard deviation = 80.3 94.3 66.2 110.6 171.3 70.7
Temperature (degrees C)06/22/10 15.8 15.0 14.9 NM
11/19/10 16.2 15.1 16.2 NM
03/23/11 12.1 14.6 13.5 11.9
05/23/11 14.2 14.9 14.6 NM
08/23/11 16.3 15.3 16.1 NM
11/15/11 16.8 16.1 16.7 15.4 16.5 NM
02/21/12 13.7 14.8 14.5 NM
06/05/12 15.7 14.9 14.8 NM
11/12/12 16.6 15.4 16.6 NM
05/13/13 13.3 14.8 13.9 NM
11/11/13 16.5 15.8 16.2 15.2 16.3 15.9
02/10/14 12.2 14.3 13.9 13.0
05/12/14 14.9 14.1 13.2 14.8 14.0 14.9
08/18/14 16.3 15.1 15.5 15.9
11/11/14 16.7 15.5 16.5 15.1 16.3 16.0
02/23/15 11.8 14.3 13.5 12.7
05/12/15 14.8 14.3 13.3 14.8 13.9 14.7
08/24/15 16.5 15.1 15.9 16.5
11/10/15 16.5 15.8 16.6 15.2 16.2 16.0
average = 16.0 15.3 14.9 14.9 15.1 14.7
standard deviation = 0.9 0.8 1.8 0.3 1.1 1.6
MW-23 MW-24ConstituentSample Date MW-15 MW-16 MW-21S MW-21D
INDICATOR PARAMETERS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
MW-23 MW-24ConstituentSample Date MW-15 MW-16 MW-21S MW-21D
INDICATOR PARAMETERS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - NORTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
Specific Conductance (mS/cm)06/22/10 0.795 0.839 0.476 NM
11/19/10 0.752 0.936 0.709 NM
03/23/11 0.793 0.871 0.601 0.763
05/23/11 0.843 0.941 0.641 NM
08/23/11 0.848 0.980 0.826 NM
11/15/11 0.987 0.428 0.681 0.758 0.726 NM
02/21/12 0.800 0.928 0.828 NM
06/05/12 0.821 0.970 0.756 NM
11/12/12 0.888 1.019 0.910 NM
05/13/13 0.901 1.007 0.721 NM
11/11/13 1.312 0.442 0.969 1.136 1.045 0.945
02/10/14 0.924 0.973 0.806 0.872
05/12/14 1.306 0.510 0.892 0.902 0.868 0.907
08/18/14 0.876 1.021 1.022 0.859
11/11/14 1.288 0.383 0.937 1.141 1.143 0.915
02/23/15 1.029 1.055 1.036 0.916
05/12/15 1.341 0.503 0.998 1.003 0.991 0.921
08/24/15 0.993 1.070 1.157 0.929
11/10/15 1.295 0.565 0.996 1.074 1.131 0.920
average = 1.255 0.472 0.881 0.980 0.863 0.895
standard deviation = 0.132 0.066 0.094 0.097 0.196 0.053
Dissolved Oxygen (%)06/22/10 6.0 14.6 13.2 NM
11/19/10 27.5 14.6 7.4 NM
03/23/11 59.2 12.8 10.0 31.6
05/23/11 91.5 98.0 1.1 NM
08/23/11 8.5 40.6 5.4 NM
11/15/11 16.0 17.0 58.5 9.2 6.6 NM
02/21/12 6.4 2.0 5.9 NM
06/05/12 28.3 10.0 3.6 NM
11/12/12 53.9 72.4 16.7 NM
05/13/13 13.6 80.9 4.4 NM
11/11/13 5.2 7.2 32.7 7.8 7.4 24.7
02/10/14 15.7 2.2 12.7 33.5
05/12/14 1.6 0.6 22.4 3.1 1.2 12.6
08/18/14 4.5 9.3 10.5 24.6
11/11/14 3.3 47.2 41.5 2.2 7.8 22.5
02/23/15 18.4 11.6 9.5 36.0
05/12/15 14.8 27.0 26.4 14.2 18.0 28.5
08/24/15 34.5 2.3 7.0 12.0
11/10/15 5.8 5.5 28.8 27.2 23.5 26.4
average = 7.8 17.4 30.4 22.9 9.0 25.2
standard deviation = 6.1 17.4 22.5 29.0 5.8 8.0
turbidity (NTU)06/22/10 19.6 5.9 7.1 NM
11/19/10 23.0 1.0 5.0 NM
03/23/11 NM
05/23/11 38.0 6.8 5.2 NM
08/23/11 24.0 4.5 3.1 NM
11/15/11 2.7 2.8 22.5 7.1 2.4 NM
02/21/12 15.0 7.1 3.3 NM
06/05/12 15.2 6.2 2.8 NM
11/12/12 6.0 3.0 1.6 NM
05/13/13 1.0 2.2 1.3 NM
11/11/13 1.5 1.3 2.5 0.4 1.8 4.5
02/10/14 4.8 3.9 1.2 1.4
05/12/14 13.0 13.8 8.2 4.2 0.6 1.3
08/18/14 9.1 0.5 0.8 0.4
11/11/14 3.1 4.3 2.9 0.3 0.6 0.5
02/23/15 1.9 0.3 0.5 0.5
05/12/15 7.3 11.5 7.5 0.4 0.6 0.2
08/24/15 22.0 0.5 0.4 0.3
11/10/15 0.0 0.0 0.0 0.0 0.0 0.0
average = 4.6 5.6 12.4 3.0 2.1 1.0
standard deviation = 4.8 5.7 10.6 2.7 2.0 1.4
All values are last recorded immediately prior to sample collection.
03-23-11 - parameters remeasured one day after sampling; suspect faulty meter during sampling
NM - Not Measured; well sampled with Hydrasleeve.
R00592-163

ATTACHMENT 7

LABORATORY CERTIFICATES-OF-ANALYSIS

CHAINS-OF-CUSTODY

QUALITY CONTROL INFORMATION

POINT-OF-COMPLIANCE WELLS

SHARED WELLS

SURFACE WATER

TRIP BLANKS

ATTACHMENT 8

FIELD DATA

ATTACHMENT 8

FIELD DATA

Groundwater samples were obtained in accordance with the groundwater monitoring requirements
of the 15A North Carolina Administrative Code (NCAC) 13B and the Permit. Detailed sampling
procedures are documented on a series of groundwater sampling forms (presented at the end of this
ATTACHMENT).

1.1 Chronology

During November 10, and November 11, 2015 (sampling event 44), Sherrill Environmental, Inc.
(Sherrill) personnel obtained groundwater samples from fourteen groundwater monitoring wells at
the Orange County Solid Waste Management North Facility (north side of Eubanks Road). During
the subject sampling event, the laboratory performed the following chemical analyses:
 samples obtained from twelve compliance wells (6801-MW04, 6801-MW06R, 6801-
MW07R, 6801-MW14A, 6801-MW14B, 6801-MW15, 6801-MW16, 6801-MW17, 6801-
MW20, 6801-MW21S, 6801-MW21D, 6801-MW22) and two surface water locations were
analyzed for the constituents listed in 40 CFR Part 258 Appendix I (15A NCAC 13B .1600),
plus those constituents listed in Appendix II that have been previously and reliably detected
at this facility (mercury, naphthalene, sulfide)
 samples obtained from two “nature and extent” monitoring wells (6801-MW23, 6801-
MW24), were analyzed for the constituents listed in 40 CFR Part 258 Appendix I (15A
NCAC 13B .1600), plus those constituents listed in Appendix II that have been previously
and reliably detected at this facility (mercury, naphthalene, sulfide)
 samples obtained from four additional wells (6801-MW21S, 6801-MW21D, 6801-MW23,
6801-MW24) were analyzed for chloride and carbon dioxide
 samples obtained from four monitoring wells associated with the groundwater remediation
injection program (6801-MW21S, 6801-MW21D, 6801-MW23, 6801-MW24), were
analyzed for the following additional inorganic constituents, in accordance with the
approved Underground Injection Control permit: manganese, potassium
 samples of surface water obtained from two locations along Old Field Creek, were analyzed
for the constituents listed in 40 CFR Part 258 Appendix I (15A NCAC 13B .1600), plus
those constituents listed in Appendix II that have been previously and reliably detected at
this facility (mercury, naphthalene, sulfide)
 samples obtained from well 6801-MW04 were analyzed for constituents required by
regulations for monitoring of C&D landfills (manganese, iron, chloride, sulfate, total
dissolved solids, alkalinity) (well 6801-MW04 is associated with the monitoring programs
for both the active C&D landfill and North sanitary landfill)
 additional samples were obtained from well 6801-MW04 and analyzed for quality control
parameters
 one trip blank was analyzed for quality control parameters
Field Data
Page 2

1.2 Well Inspection

Prior to sampling groundwater, Sherrill personnel assessed the overall condition of each
groundwater monitoring well (including the surface completion). According to documentation
provided by Sherrill personnel, all wells were observed to be in generally good condition.

1.3 Static Water Levels

Using a graduated electronic water level indicator, field personnel measured static water levels in
each well prior to purging. All measurements were recorded to the nearest 0.01 foot (relative to the
top of the PVC well pipe).

A history of static water elevations is presented in ATTACHMENT 3.

1.4 Purging

All permitted wells were purged by Sherrill personnel using dedicated, submersible bladder
pumps driven by an electric-powered air compressor and an associated control unit. Wells were
purged using a performance-based (“low-flow”) criteria presented in the document Guidelines for
Groundwater, Soil, and Surface Water Sampling (NCDENR - SWS; April, 2008). Field purge
and sample logs provided by Sherrill are presented at the end of this ATTACHMENT.

1.5 Groundwater Stability

The performance-based purging method essentially involves purging groundwater from a
monitoring well at a sufficient rate so as not to significantly disturb the water column. During
the purging process, several water quality parameters (pH, specific conductance, water
temperature, dissolved oxygen, turbidity, ORP) are periodically measured until successive
readings are generally consistent (within 10%). Additional purging criteria are presented in the
Guidelines document discussed above.

During the subject sampling event, the monitoring wells were purged until several consistent
field parameter readings were recorded. These parameters were measured in order to help ensure
that representative groundwater samples were obtained. Groundwater samples were obtained
immediately after the physical parameters had stabilized.

Field Data
Page 3

Stability is defined in the Groundwater Monitoring Plan as a deviation of less than 10% for two
consecutive readings. Readings recorded for each well are presented at the end of this
ATTACHMENT.

Note. When water levels are low in a well, or when the screened portion of the aquifer is
characterized by low hydraulic conductivity, the well may be purged to dryness. In such cases,
field personnel will allow time for groundwater levels to equilibrate, and restart the sampling
process from the point at which it was interrupted. If the well again purges to dryness, the
technician will obtain samples as the well recharges. In such cases, the groundwater samples are
deemed “representative” even if the usual stable readings cannot be obtained.

1.6 Well Sampling

Groundwater samples were obtained immediately after the water quality parameters had
stabilized.

The QA/QC analyses were performed on the samples obtained from well 6801-MW4.

1.7 Well Sampling Order

On November 10, 2015, Sherrill personnel sampled wells in the following order: 6801-MW04.

On November 11, 2015, Sherrill personnel sampled wells in the following order: 6801-MW06R,
6801-MW07R, 6801-MW23, 6801-MW24, 6801-MW21S, 6801-MW21D, 6801-MW14B, 6801-
MW14A, 6801-MW22, 6801-MW15, 6801-MW16, 6801-MW17, 6801-MW20.

On November 11, 2015, Sherrill personnel sampled surface water locations in the following
order: 6801-SW1, 6801-SW2.

1.8 Preservation

At the laboratory, all sample containers were prepared with preservative by ENCO if required by
the method in SW-846.

All samples were placed beneath ice in coolers immediately after the samples were obtained.

Field Data
Page 4

1.9 Sample Transport

Immediately after the samples were obtained, they were placed beneath ice in insulated containers
for transportation to the laboratory.

All samples obtained during the subject sampling event were delivered by Sherrill personnel to
ENCO on November 11, and 12, 2015. The trip blanks were delivered to ENCO on November
11, 2015.

Upon arrival at the laboratory, all temperatures inside of the insulated containers were measured and
found to lie within acceptable limits (< 4°C). All samples were placed in a refrigerator upon arrival
and held at approximately 4°C until the time at which they were analyzed.

Additional information concerning each monitoring well is presented at the end of this
ATTACHMENT.
Sherrill Environmental, Inc. GROUNDWATER SAMPLING FIELD DATA WORKSHEET Project Name: Orange Co. LF -NORTH Permit No.: 68-01 Client : Draper Aden WELL NUMBER: MW04 Well I.Diam: Measurements from TOC Screened interval: ------Date: l l!tD/2015 Time: Weather: 9 "fl) 1 • SZ ')tr, ul Personnel: J. Sherrill, LG Total well depth (TD): 55.33 Length of water column: Z.. ~ ,() Total water volume purged: 5.5 Depth to water (DTW): 3 '2.., 3 ~ Volume in well (gal): r:3,0/ 3,0
Method Purged: Dedicated Bladder Pump
Method sampled:_--=D~ed=ic=a=te=d-=B=la=d=de=r~P-=um=p _______ _
Purge Time pH Temp Specific Dissolved ORP Turbidity
Vol. (G) (C) Cond. (mS/cm) Oxygen(%) (mV) (NTU)
Z,0 B55 ~,5-:f ,s,,t,i O.D-=l-6 7'1,-:::; -,,, $ S . .5
3 { (') qro S.6 °I tS.hJ O.D':/ 6 ·=,3. ~ -1:i.iq sto
'i,S 9oS Sr=l r 15,,6<-O,o={ b 72, r; -IB6 3,'f
S,5 CfoR S,12 f S, {;, < 0 ,Di!:,, 7:ll, 0 -s z. 2..,R
Remarks on Sampling and Well Condition:
Sample Collection Time: °\ I D
Sherrill Environmental, Inc. GROUNDWATER SAMPLING FIELD DATA WORKSHEET Project Name: Orange Co. LF-NORTH Permit No.: 68-01 Date: 11/ II /2015 Time: SL£0 Weather: .SS Client : Draper Aden ----WELL NUMBER: MW06R Well I.Diam: Measurements from TOC Screened interval: ------Personnel: J. Sherrill, LG Total well depth (TD): 53.66 Depth to water (DTW): '2.. 5 . S i-f Length of water column: 2-.'6, lZ.. Total water volume purged: 2. ,D Volume in well (gal): L-(, 5
Method Purged: Dedicated Bladder Pump
Method sampled: Dedicated Bladder Pump
Purge Time pH Temp Specific Dissolved ORP
Vol. (G) (C) Cond. (mS/cm) Oxygen(%) (mV)
D.B sso lo. 03 t t, ,8 0,325 VJ~ I -It ,3
l tr) 855 fp,03 ll,,ffl 0. -~Lb b 3,, I -Z.':l.S
\ l 5 qoo (,.,. r,-, lfo 9/J I), 3 3 l '1 q. ( -t.{ fa,=l
2.tO 9DS fn.D'-l 1'1.~t 0. '3'2.. \ 3°t P1 -S-=l.S
Remarks on Sampling and Well Condition:
CJse.-r-e..pl"-'-e"""<~ '{~l ~e+e.r,
Sample Collection Time: °l O "'.:)...
Turbidity
(NTU)
D.D D~D
0,0
DO
Sherrill Environmental, Inc. GROUNDWATER SAMPLING FIELD DATA WORKSHEET Project Name: Orange Co. LF -NORTH Permit No.: 68-01 Client : Draper Aden WELL NUMBER: MW07R Well I.Diam: Measurements from TOC Screened interval: ------Date: Time: Weather: Personnel: l 1/1 l/2015 C, I ':\--J. Sherrill, LG Total well depth (TD): 21.92 Depth to water (DTW): ID ,30 Length of water column: I I • CJ L. Volume in well (gal): __ I ,_B __ Total water volume purged: 2 ;D
Method Purged: Dedicated Bladder Pump
Method sampled:_---=-D"""'ed=ic=a=te--=d~B=la=d=de=r-=P~um==.-p _______ _
Purge Time pH Temp Specific Dissolved ORP Turbidity
Vol. (G) (C) Cond. (mS/cm) Oxygen(%) (mV) (NTU)
0.? qz.o ft,, bl ,s.2, D,qo":l 22, 3 -4C,..~ 2,'
() \ ~ 925 t;, :f J I) r {l > 0, 9 <o4 l l. ~ -~( '" /J.~
\ \.1) q U; h,17 { f>r If o,qe4 lDc':> -Bl,? 0,Lf
(' ~ q7,~ (p ,ra'o 15.( L\ O r q ~"":\ 9 .0\. -8=J. () D~D
Remarks on Sampling and Well Condition:
Sample Collection Time: 9 l\ D
Sherrill Environmental, Inc. GROUNDWATER SAMPLING FIELD DATA WORKSHEET Project Name: Orange Co. LF -NORTH Permit No.: 68-01 Client : Draper Aden WELL NUMBER: MW14A Well I.Diam: Measurements from TOC Screened interval: ------Date: 11/ l (/2015 Time: / 2.. 2.. 0 f'Dv Weather: <o Personnel: J. Sherrill, LG Total well depth (TD): 14.88 Depth to water (DTW):----'-S_,_3_:f:.____ Length of water column: q I 5 4 Volume in well (gal): _,_. _s __ _ Total water volume purged: 3 r 5
Method Purged: Dedicated Bladder Pump
Method sampled: Dedicated Bladder Pump
Purge Time pH Temp Specific Dissolved ORP Turbidity
Vol. (G) (C) Cond. (mS/cm) Oxygen(%) (mV) (NTU)
ID t z..zs fo,Zr l ':\-l ll, IH+f 9 .. B -1~8,5 "'3 l" 2.,0 t13D (p ,/~ l 1. 7il. l ,LftfO 2.5. z.. -lCF(.z_ 0,$
3,D l 235 (p,3'1 l1. Jl, I 14'2-fA G,512.. -q,,L ('),0
~ { z; l231-ro.-z_r; C:? 3'1 l, 4 3'f lf 3 r ~ -100. '=l-(),tf
Remarks on Sampling and Well Condition:
Sample Collection Time: / 2. Lf D
~-----------~~ Sherrill Environmental, Inc. GROUNDWATER SAMPLING FIELD DATA WORKSHEET Project Name: Orange Co. LF -NORTH Permit No.: 68-01 Client : Draper Aden WELL NUMBER: MW14B Well I.Diam: Measurements from TOC Screened interval: _____ _ Date: 11/ /(/2015 Time: i I 5D Weather: 6::D -----Personnel: J. Sherrill. LG Total well depth (TD): 34.16 Depth to water (DTW): 5:, 3 2-Length of water column: 2-B,S:1 Volume in well (gal): _q....c.....:....,&;,=---Total water volume purged: "Lt B
Method Purged: Dedicated Bladder Pump
Method sampled:_--=D-=ed=i=ca=te=d"-"B=l=ad=d=e"-'r P"-'um=p;:........... _______ _
Purge Time pH Temp Specific Dissolved ORP Turbidity
Vol. (G) (C) Cond. (mS/cm) Oxygen(%) (mV) (NTU)
bf l.f (m:) (;,, 2.=l I ':f-,(,~ l. Z'-1. 0 ,q.o -, t/ {,. ( q,/
( 'Lt IZO'S fa 2..D 11,:J-Z, 1. ? f,.. I ~. { -t1Z.9 1L2
t..,t-t 12.10 ~,2!) r1.11 ( I 2-.<'i, l, :+. l -l e8,D C.T
"2.,]; 12..rs /p,tCo lt.Ptt, I, L 1" Lf -=l-t 't; -t'1r,=, 0, <;
Remarks on Sampling and Well Condition:
Sample Collection Time: I 7-l :}-
Sherrill Environmental, Inc. GROUNDWATER SAMPLING FIELD DATA WORKSHEET Project Name: Orange Co. LF -NORTH Permit No.: 68-01 Date: 11/t( /2015 Time: f 3ZO Client : Draper Aden Weather: 0 0 CY c .. / /7d1 ,,,... WELL NUMBER: MW15 Personnel: J. Sherrill, LG Well I.Diam: Measurements from TOC Screened interval: ------Total well depth (TD): 28.36 Depth to water (DTW): Length of water column: 2. 1...., '-f \ Volume in well (gal): Total water volume purged: 5 ,0
Method Purged: Dedicated Bladder Pump
Method sampled: Dedicated Bladder Pump
Purge Time pH Temp Specific Dissolved
Vol. (G) (C) Cond. (mS/cm) Oxygen(%)
I. c; Is~ 1,35" /6.'f't) (,3/) z. 6 . I
3tD /3~5 1.3) lb.>I r. z.q B St9
Li.,; t?>'tO 1,15 (~.52 l, zct re, Sri
5,D ( 3'12-1( /3 lbpSZ I , Z..C\ S >rS
Remarks on Sampling and Well Condition:
Sample Collection Time: f 3 t/ Lf
ORP
(mV)
-( z.B.o
-Jtf(p, 3
-[~":}. f
-15'1/1
Turbidity
(NTU)
o.o
D.O
0,0
nto
Sherrill Environmental, Inc. GROUNDWATER SAMPLING FIELD DATA WORKSHEET Project Name: Orange Co. LF -NORTH Permit No.: 68-01 Client : Draper Aden Date: 11Ill/2015 Time: I 355 /00 Weather: '° WELL NUMBER: MW16 Personnel: J. Sherrill, LG Well I.Diam: Measurements from TOC Screened interval: ------Total well depth (TD): 32.47 Length of water column: 2-9, ~::S Total water volume purged: 5 ,5 Depth to water (DTW): 3., 1.... Volume in well (gal): 4, ~
Method Purged: Dedicated Bladder Pump
Method sampled: __ D~ed=ic~a=te~d_B~la~d~de=r~P~um_p _______ _
Purge Time pH Temp Specific Dissolved ORP
Vol. (G) (C) Cond. (mS/cm) Oxygen(%) (mV)
LS l"t()C) -=}. \?.. rs:=H, O,SI~ b.3 -145,=1
3,S \1.\0:S 1. l 5 l53'f 1LS35 4:1. 6 -ISL I
t:t O (Lf ,o 't.l1 ( S".1i 1>, ~s 8 ~cb -I ~f ~
S', s \ lf l 2 =?. ( 1 ,~.1~ /) r ~I:,) ~·~ -Is'{. C:..
Remarks on Sampling and Well Condition:
( t-+ ("C Sample Collection Time: _1 J
Turbidity
(NTU)
0.0
eJ.O
D.() • o.o
Sherrill Environmental, Inc. GROUNDWATER SAMPLING FIELD DATA WORKSHEET Project Name: Orange Co. LF -NORTH Permit No.: 68-01 Client : Draper Aden WELL NUMBER: MWl 7 Well I.Diam: Measurements from TOC Screened interval: ------Date: 1 lA \/2015 Time: I '-( Z.. 2-Weather: f, 0 ----Personnel: J. Sherrill. LG Total well depth (TD): 47.54 Depth to water (DTW): 5. 6 2 Length of water column: 3 Sr 5' L. Volume in well (gal): ___.,"'---'--r _/ __ Total water volume purged: Sr O
Method Purged: Dedicated Bladder Pump
Method sampled: Dedicated Bladder Pump
Purge Time pH Temp Specific Dissolved ORP Turbidity
Vol. (G) (C) Cond. (mS/cm) Oxygen(%) (mV) (NTU)
0, '2_ l't 2.5 b,11 ,r.~e 0. 'l'c, '{ ("{, z. -5'?.D 6.0
'2.., 0 I'"( 3l> 6~43> 15:~ f.06( 6.0 -I O=J.,l D.D
3t5 f"f3S {p .C'l9 .~.6=1 ', om-~.~ -ltf O.b DD
S, o I 1'1D ,.1, 15,Jli l I ( l c 5. """?:, -1s1.2. o.o
Remarks on Sampling and Well Condition:
Sample Collection Time: f 4 '12-
---------~ -----~~~~ Sherrill Environmental, Inc. GROUNDWATER SAMPLING FIELD DATA WORKSHEET Project Name: Orange Co. LF -NORTH Permit No.: 68-01 Date: 11/t (/2015 Time: I '-I '-1-=4--Client: Draper Aden W eather: C:, 0 ---=-----WELL NUMBER: MW20 Personnel: J. Sherrill. LG Well I.Diam: Measurements .from TOC Screened interval: ------Total well depth (TD): 48.43 Depth to water (DTW): Length of water column: W, '16 Volume in well (gal): Total water volume purged: 3 t O
Method Purged: Dedicated Bladder Pump
Method sampled:_-=D=ed=ic=a=te=d-=B=la=d=de=r--=-P-=um=-p _______ _
Purge Time pH Temp Specific Dissolved ORP
Vol. (G) (C) Cond. (mS/cm) Oxygen(%) (mV)
1.0 l1tS5 "' Lf2 t'g,Z.'::1-2 I qJ../ °3, t-/, b -/§'/, 2.
'2.0 r 5oe, '1.33 IS,38 2 ,'102.. '-/, ~ -I bS,7
2.,S L ~OS '1.ZS l 8,ttt 2,8Bb '-f. B -f-:,t:,.B s.o l ~{O "~ 3/ 18/t/ z_.q I I L{.a -182 .0
Remarks on Sampling and Well Condition:
Sample Collection Time: / ) / tf
Turbidity
(NTU)
8.D
5,7
1.5
lf,B
Sherrill Environmental, Inc. GROUNDWATER SAMPLING FIELD DATA WORKSHEET Project Name: Orange Co. LF -NORTH Permit No.: 68-01 Client : Draper Aden WELL NUMBER: MW21S Well I.Diam: Measurements from TOC Screened interval: ------Date: Time: Weather: Personnel: 11/ l C/2015 fb q5 J. Sherrill. LG Total well depth (TD): 25.14 Length of water column: 2 '2...,C>S Total water volume purged: 3, 2 Depth to water (DTW): 3 ,ob Volume in well (gal): _3~, 5"""'----
Method Purged: Dedicated Bladder Pump
Method sampled:_~D~ed=ic=a=te-d~B=la=d=de=r~P~um=--p _______ _
Purge Time pH Temp Specific Dissolved ORP Turbidity
Vol. (G) (C) Cond. (mS/cm) Oxygen(%) (mV) (NTU)
L 2-1050 ":f;03 lb.SS D,°tfo8 lf br D -«a=i·=i ~.o
2l> 1055, t.D 3 l~'fB 6 .. 'tfo4 '-f .8 --I~ 3,0 D.O
3 ~D I( ?>0 (p,q~ th,S:, (\ • ct. 8 S 3-=7,3 ~ ltz.·s 0,0
3 t 2-l l lJ 2 b. °L 2 I{,, ~·s-(),qq(p 2 ~rg -( L8,B D,D
Remarks on Sampling and Well Condition:
Sample Collection Time: I I O l-f
\\D l2>
Sherrill Environmental, Inc. GROUNDWATER SAMPLING FIELD DATA WORKSHEET Project Name: Orange Co. LF -NORTH Permit No.: 68-01 Date: Time: 111(( /2015 It D:/-Client : Draper Aden Weather: ~0~0~0 __ WELL NUMBER: MW21D Well I.Diam: Measurements from TOC Screened interval: ------Total well depth (TD): 54.55 Length of water column: 5 Z.., ~ 3 Total water volume purged: S, 0 Personnel: J. Sherrill. LG Depth to water (DTW): I , 9 2 Volume in well (gal): 8 r '-I
Method Purged:_---=D=e=d=ic=at=ed=-=B=la=dd=e=-r=-Pum=P~-------
Method sampled:_~D~ed=ic=a=te=d~B=la=d=de=r~P~um=--p _______ _
Purge Time pH Temp Specific
Vol. (G) (C) Cond. (mS/cm)
\ \ 2.. 1115 (o,71z; l~ICi I, DB l-
2,5 ( f 2.0 6, ,":/-'-( 15',,<o L08l.f
Lt, 0 l(Z..5 t, ,t4 rs,rs (i 0~2_
Seo (l 3C 4,.~ l 5, {-:+ /,07:/:Lf
Remarks on Sampling and Well Condition:
tJ eels I c,c,K
Sample Collection Time: If 3S
Dissolved ORP
Oxygen(%) (mV)
to, 3 «-('12,°l cc.~ -( 1,33
S,~ -Ll/J. ~
z1. 1--(6Z.,6
Turbidity
(NTU)
(),0
0.0
O .. C)
0,.0
Sherrill Environmental, Inc. GROUNDWATER SAMPLING FIELD DATA WORKSHEET Project Name: Orange Co. LF -NORTH Permit No.: 68-01 Date: 111\l /2015 Time: (Z...~5 Client : Draper Aden Weather: ~'~{) ___ _ WELL NUMBER: MW22 Well I.Diam: Measurements from TOC Screened interval: ------Personnel: J. Sherrill. LG Total well depth (TD): 64.92 Length of water column: CJ 2... 1 SZ. Total water volume purged: 5 ,0 Depth to water (DTW): Z. · (0 Volume in well (gal): f D, (JS
Method Purged:_----=D=e=-=d=ic=at=e=-d =B=la=dd=e=r-=-Pum=p _______ _
Method sampled: __ D~ed=ic~a=te-d~B~la~d=de~r~P~um=-p _______ _
Purge Time pH Temp Specific Dissolved ORP
Vol. (G) (C) Cond. (mS/cm) Oxygen(%) (mV)
LD IZ.SD =t. Pi, lb ,,if l. 4:bO r o. , -t'3lf.3
~,'S C'l.t;_s +Pfs l b-3l fr3C{'=, \3 .. 9.., - t 'f'r,~
.3t s 13,(X) 8~0; l (o .. '[J.. l. ~ 'S°L lD~lP -I b3, 3 s ,l? t~o-s ~lft t b. 2..3 t ( 3Co ( (2. l 3 -\-=?0t0
Remarks on Sampling and Well Condition:
Sample Collection Time: [ '.s O -=t-
Turbidity
(NTU)
I, 'f
D,0
0.l)
o,o
Sherrill Environmental, Inc. GROUNDWATER SAMPLING FIELD DATA WORKSHEET Project Name: Orange Co. LF -NORTH Permit No.: 68-01 Client : Draper Aden WELL NUMBER: MW23 Well I.Diam: Measurements from TOC Screened interval: ------Date: 11/fl/2015 Time: °!'1~ Weather: S 5 ----Personnel: J. Sherrill, LG Total well depth (TD): 32.23 Depth to water (DTW): '2., ::\ 3 Length of water column: 2. 4, S Volume in well (gal): _L~f-"--, + __ Total water volume purged: SrD
Method Purged: Dedicated Bladder Pump
Method sampled: Dedicated Bladder Pump
Purge Time pH Temp Specific Dissolved ORP Turbidity
Vol. (G) (C) Cond. (mS/cm) Oxygen(%) (mV) (NTU)
I.D °LSD br9-f /6.0? /. 171 D z.-::;.q -/~2,8 t)t I
2-,0 q55 ",Sb ({a,~ I. I 4 ~ 3~, 3 -f( 'f, 1..-1 o.o
t-f ,O ll>bo to,S1 I b. 2_-:, ( . l ( q 2-t>,3 -I D5.S D,l)
5,D /0()3 IP. Si (6ll f , I 3 \ 2.3,~ -t OR, 7> o.o
Remarks on Sampling and Well Condition:
Sample Collection Time: ( DO .5
Sherrill Environmental, Inc. GROUNDWATER SAMPLING FIELD DATA WORKSHEET Project Name: Orange Co. LF -NORTH Permit No.: 68-01 Client : Draper Aden WELL NUMBER: MW24 Well I.Diam: Measurements from TOC Screened interval: ------Date: 11/fl /2015 Time: I 0/D Weather: IPO ~---Personnel: J. Sherrill, LG Total well depth (TD): 38.28 Depth to water (DTW): 3, OB Length of water column: !:> 5, 2-Volume in well (gal): -~S"--,&, __ Total water volume purged: 3 t €,
Method Purged: Dedicated Bladder Pump
Method sampled: __ D=ed=ic=a=te=d-=B=la=d=de=r--'--P-=um~P--------
Purge Time pH Temp Specific Dissolved ORP Turbidity
Vol. (G) (C) Cond. (mS/cm) Oxygen(%) (mV) (NTU)
I), 3 I/IS ':f.DO 15,'1( /), q lo ( q,q -{D1b Oen
t , 5 L D Z.1) 1.D ( 15.B( O t~ 'i8 ~St~ -l 3J/f O,D
2.., 5 IOZ.S ':/.DD ( f>,9~ o, ct'-t '2.. 1 l . 2--, 'f s. z o.o
s,S lD3C =!.b3 Lt, ,Dl D ,Dz 1-0 1.. (,,, 'i -\ Z..8r1 OrD
Remarks on Sampling and Well Condition:
Sample Collection Time: ( D ~ ~
ATTACHMENT 9

STATISTICAL ANALYSES

ATTACHMENT 9

STATISTICAL ANALYSES

Statistical analyses were previously performed in order to establish facility background
concentrations for all Appendix I constituents. A report was submitted to NCDENR during
October, 1998.

During 2007, NCDENR promulgated Solid Waste Section Limits (SWSLs) for listed organic and
inorganic constituents, and for most general chemistry parameters. The SWSL values were
established in lieu of laboratory Practical Quantitation Limits (PQLs), and are intended to
function as the laboratory reporting limits.

Previously-determined facility background values have been replaced with their respective
SWSL (where appropriate). The only exception is total barium, where the background
concentration (a statistical prediction limit) was previously calculated as 500 g/l, and the SWSL
is 100 g/l.

The most current facility background concentrations (denoted as “FBAC” values) are shown on a
series of tables summarizing the history of groundwater chemistry at the North landfill
(ATTACHMENT 5 and ATTACHMENT 6).
ATTACHMENT 10

QUALITY CONTROL ASSESSMENT

ATTACHMENT 10

QUALITY CONTROL ASSESSMENT

1.0 FIELD QUALITY ASSURANCE / QUALITY CONTROL

Rigorous sampling protocols were employed during groundwater sampling to help ensure that
each sample is representative of groundwater in the aquifer. Any non-dedicated equipment used
to purge and sample monitoring wells was decontaminated before and after sampling each well.

In addition, trip blanks were analyzed in order to help validate the observed concentrations of
specific constituents. The concentration of each constituent observed in groundwater was compared
to the concentration observed in each blank in accordance with the following rules:
 With regard to common organic laboratory contaminants (acetone, 2-butanone, methylene
chloride) and common phthalate contaminants, if the concentration in groundwater is less
than ten times (10x) the concentration in the blank, then we conclude that the constituent in
the groundwater sample may be attributed to cross-contamination.
 With regard to organic contaminants that are not commonly used in the laboratory and
inorganic contaminants in general, if the concentration in groundwater is less than five times
(5x) the concentration in the blank, then we conclude that the constituent in the groundwater
sample may be attributed to cross-contamination.

1.1 Deviations from the Plan

All sampling techniques met the specifications set forth in the Groundwater Monitoring Plan.

1.2 Trip Blanks

Trip blanks were prepared by the laboratory and transported by field personnel to each monitoring
well location. Trip blanks remained in the insulated container, and the lids of the containers were
never removed from the time the vehicle left the laboratory until the time field personnel delivered
the samples to the laboratory.

Trip blanks were analyzed for all constituents listed in 40 CFR Part 258 Appendix I (15A NCAC
13B .1600) that are typically analyzed using EPA Method 8260B.

No target analytes were detected within the trip blank.

Quality Control
Page 2

2.0 LABORATORY QUALITY ASSURANCE / QUALITY CONTROL

A limited QA/QC review was performed on the data provided by ENCO Laboratories. In general,
the Environmental Protection Agency's (EPA) Contract Laboratory Program (CLP) guidelines for
data validation in Region III were followed; however, SW-846 control limits (latest promulgated
edition) were used for QA/QC requirements.

Specifically, laboratory blanks were analyzed in order to help validate the observed
concentrations of specific constituents. The concentration of each constituent observed in
groundwater was compared to the concentration observed in each blank in accordance with the
following rules:

 With regard to common organic laboratory contaminants (acetone, 2-butanone,
methylene chloride) and common phthalate contaminants, if the concentration in
groundwater is less than ten times (10x) the concentration in the blank, then we conclude
that the constituent in the groundwater sample may be attributed to cross-contamination.

 With regard to organic contaminants that are not commonly used in the laboratory and
inorganic contaminants in general, if the concentration in groundwater is less than five
times (5x) the concentration in the blank, then we conclude that the constituent in the
groundwater sample may be attributed to cross-contamination.

2.1 EPA Method 8260B (volatile constituents)

As part of the QA/QC review, the following were examined:

 technical holding times and preservation requirements
 blank analysis
 transcription/confirmation errors

After reviewing the quality control data provided by ENCO Laboratories, the reviewer
determined that the dataset met all requirements of the criteria listed above, as specified by SW-
846 for the referenced method.

2.2 EPA Method 6010C (ICP - metals)

As part of the QA/QC review, the following were examined:

 technical holding times and preservation requirements
 blank analysis
 transcription/confirmation errors

Quality Control
Page 3

After reviewing the quality control data provided by ENCO Laboratories, the reviewer
determined that the dataset met all requirements of the criteria listed above, as specified by SW-
846 for the referenced method.

2.3 EPA Method 6020A (ICP - metals)

As part of the QA/QC review, the following were examined:

 technical holding times and preservation requirements
 blank analysis
 transcription/confirmation errors

After reviewing the quality control data provided by ENCO Laboratories, the reviewer
determined that the dataset met all requirements of the criteria listed above, as specified by SW-
846 for the referenced method.

2.4 EPA Method 7470A (total mercury)

As part of the QA/QC review, the following were examined:

 technical holding times and preservation requirements
 blank analysis
 transcription/confirmation errors

After reviewing the quality control data provided by ENCO Laboratories, the reviewer
determined that the dataset met all requirements of the criteria listed above, as specified by SW-
846 for the referenced method.

2.5 EPA Method SM 4500S2 D-2000 (sulfide)

As part of the QA/QC review, the following were examined:

 technical holding times and preservation requirements
 blank analysis
 transcription/confirmation errors

After reviewing the quality control data provided by ENCO Laboratories, the reviewer
determined that the dataset met all requirements of the criteria listed above, as specified by SW-
846 for the referenced method.
[QUALITY CONTROL DOCUMENTATION, AS PROVIDED BY THE
LABORATORY, IS PRESENTED IN ATTACHMENT 7, ALONG WITH THE
ASSOCIATED CERTIFICATE-OF-ANALYSIS]
ATTACHMENT 11

CORRESPONDENCE