6801_OrangeCoMSWLFSouth_GWMR_DIN26880_20160209

Prepared for:

Prepared for:

Prepared by:

February, 2016
DAA No. R00592-164
ORANGE COUNTY SOLID WASTE MANAGEMENT
(SOUTH FACILITY)
GROUNDWATER MONITORING PROGRAM
PERMIT NUMBER 68-01 (AMENDED)

SAMPLING EVENT 43: 11-10-16

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
68-01 6801-MW101 7440-36-0 13 Antimony Total 0.992 ug/L J 1 11/10/2015 11/11/2015 11/16/2015 1 GWPS
68-01 6801-MW102DR 7440-36-0 13 Antimony Total 0.560 ug/L J 1 11/10/2015 11/11/2015 11/16/2015 1 GWPS
68-01 6801-MW102S 7440-36-0 13 Antimony Total 0.366 ug/L J 1 11/10/2015 11/11/2015 11/16/2015 1 GWPS
68-01 6801-MW105 7440-38-2 14 Arsenic Total 81.7 ug/L 1 11/10/2015 11/12/2015 11/17/2015 10 2L
68-01 6801-MW110D 7440-38-2 14 Arsenic Total 7.92 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 10 2L
68-01 6801-MW101 7440-39-3 15 Barium Total 14.5 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 700 2L
68-01 6801-MW102DR 7440-39-3 15 Barium Total 1.07 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 700 2L
68-01 6801-MW102S 7440-39-3 15 Barium Total 29.5 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 700 2L
68-01 6801-MW103D 7440-39-3 15 Barium Total 3.14 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 700 2L
68-01 6801-MW103S 7440-39-3 15 Barium Total 1.42 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 700 2L
68-01 6801-MW105 7440-39-3 15 Barium Total 6.53 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 700 2L
68-01 6801-MW106 7440-39-3 15 Barium Total 10.2 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 700 2L
68-01 6801-MW107 7440-39-3 15 Barium Total 6.39 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 700 2L
68-01 6801-MW110S 7440-39-3 15 Barium Total 3.55 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 700 2L
68-01 6801-MW111 7440-39-3 15 Barium Total 3.39 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 700 2L
68-01 6801-MW112 7440-39-3 15 Barium Total 12.0 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 700 2L
68-01 6801-MW110S SW301 301 Chloride 2400 ug/L J 1 11/10/2015 11/16/2015 11/16/2015 250000 2L
68-01 6801-MW102S 7440-47-3 51 Chromium Total 1.91 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 10 2L
68-01 6801-MW111 7440-47-3 51 Chromium Total 2.30 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 10 2L
68-01 6801-MW102S 7440-48-4 53 Cobalt Total 3.27 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 1 GWPS
68-01 6801-MW107 7440-48-4 53 Cobalt Total 5.95 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 1 GWPS
68-01 6801-MW111 7440-48-4 53 Cobalt Total 3.58 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 1 GWPS
68-01 6801-MW105 7440-48-4 53 Cobalt Total 39.5 ug/L 1 11/10/2015 11/12/2015 11/17/2015 1 GWPS
68-01 6801-MW112 7440-48-4 53 Cobalt Total 13.7 ug/L 1 11/10/2015 11/12/2015 11/17/2015 1 GWPS
68-01 6801-MW111 7440-50-8 54 Copper Total 2.16 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 1000 2L
68-01 6801-MW110S 7439-89-6 340 Iron Total 356 ug/L 1 11/10/2015 11/12/2015 11/17/2015 300 2L
68-01 6801-MW104 7439-92-1 131 Lead Total 3.29 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 15 2L
68-01 6801-MW107 7439-92-1 131 Lead Total 3.82 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 15 2L
68-01 6801-MW110S 7439-92-1 131 Lead Total 4.07 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 15 2L
68-01 6801-MW110S 7439-96-5 342 Manganese Total 7.71 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 50 2L
68-01 6801-MW102S 7440-02-0 152 Nickel Total 4.50 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 100 2L
68-01 6801-MW103D 7440-02-0 152 Nickel Total 2.26 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 100 2L
68-01 6801-MW103S 7440-02-0 152 Nickel Total 1.81 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 100 2L
68-01 6801-MW105 7440-02-0 152 Nickel Total 8.64 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 100 2L
68-01 6801-MW106 7440-02-0 152 Nickel Total 3.99 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 100 2L
68-01 6801-MW107 7440-02-0 152 Nickel Total 4.35 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 100 2L
68-01 6801-MW111 7440-02-0 152 Nickel Total 3.62 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 100 2L
68-01 6801-MW112 7440-02-0 152 Nickel Total 5.88 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 100 2L
68-01 6801-MW101 7440-22-4 184 Silver Total 2.38 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 20 2L
68-01 6801-MW103D 7440-22-4 184 Silver Total 2.77 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 20 2L
68-01 6801-MW105 7440-22-4 184 Silver Total 2.65 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 20 2L
68-01 6801-MW112 7440-22-4 184 Silver Total 2.53 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 20 2L
68-01 6801-MW110S SW311 311 Total Dissolved Solids 50000 ug/L 1 11/10/2015 11/12/2015 11/12/2015 500000 2L
68-01 6801-MW110S SW337 337 Total Alkalinity as CaCO3 28000 ug/L 1 11/10/2015 11/20/2015 11/20/2015 N/A N/A
68-01 6801-MW102S 7440-62-2 209 Vanadium Total 3.98 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 0.3 GWPS
68-01 6801-MW106 7440-62-2 209 Vanadium Total 2.55 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 0.3 GWPS
68-01 6801-MW107 7440-62-2 209 Vanadium Total 5.21 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 0.3 GWPS
68-01 6801-MW110S 7440-62-2 209 Vanadium Total 1.51 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 0.3 GWPS
68-01 6801-MW111 7440-62-2 209 Vanadium Total 6.31 ug/L J 1 11/10/2015 11/12/2015 11/17/2015 0.3 GWPS
68-01 6801-Leachate 78-93-3 141 2-Butanone 370 ug/L D 10 11/12/2015 11/24/2015 11/26/2015
68-01 6801-Leachate 67-64-1 3 Acetone 380 ug/L D 10 11/12/2015 11/24/2015 11/26/2015
68-01 6801-Leachate 7440-38-2 14 Arsenic Total 24.7 ug/L 1 11/12/2015 11/19/2015 11/22/2015
68-01 6801-Leachate 7440-39-3 15 Barium Total 382 ug/L 1 11/12/2015 11/19/2015 11/22/2015
68-01 6801-Leachate 7440-41-7 23 Beryllium Total 0.133 ug/L J 1 11/12/2015 11/19/2015 11/22/2015
68-01 6801-Leachate SW316 316 Biochemical Oxygen Demand 55000 ug/L 1 11/12/2015 11/13/2015 11/13/2015
68-01 6801-Leachate SW317 317 Chemical Oxygen Demand 400000 ug/L 1 11/12/2015 11/21/2015 11/21/2015
68-01 6801-Leachate 7440-47-3 51 Chromium Total 19.9 ug/L 1 11/12/2015 11/19/2015 11/22/2015
68-01 6801-Leachate 7440-48-4 53 Cobalt Total 25.6 ug/L 1 11/12/2015 11/19/2015 11/22/2015
68-01 6801-Leachate 7439-92-1 131 Lead Total 3.83 ug/L J 1 11/12/2015 11/19/2015 11/22/2015
68-01 6801-Leachate 7439-96-5 342 Manganese Total 1870 ug/L 1 11/12/2015 11/19/2015 11/22/2015
68-01 6801-Leachate 7440-02-0 152 Nickel Total 43.5 ug/L J 1 11/12/2015 11/19/2015 11/22/2015
68-01 6801-Leachate 7723-14-0 412 Phosphorus 680 ug/L 1 11/12/2015 11/16/2015 11/30/2015
68-01 6801-Leachate 14808-79-8 315 Sulfate as SO4 25000 ug/L J 1 11/12/2015 11/18/2015 11/18/2015
68-01 6801-Leachate 7440-62-2 209 Vanadium Total 16.8 ug/L J 1 11/12/2015 11/19/2015 11/22/2015
68-01 6801-Leachate 7440-66-6 213 Zinc Total 70.2 ug/L 1 11/12/2015 11/19/2015 11/22/2015
Yellow highlighted well indicates upgradient location
B - concentration is <5x constituent concentration detected in associated blank
R - concentration is unreliable
SPL - Statistical Prediction Limit
ASD - Alternate Source Demonstration
FBAC - Facility Background concentration
Bold italicized values exceed their respective regulatory protection standard and section limit.
* Note: These analyses should be interpreted in the context of the groundwater sampling report for this event.
Naturally occurring; does not exceed SWSL; ASD approved 05-26-10
natural attenuation indicator
Naturally occurring; does not exceed SWSL
natural attenuation indicator
Naturally occurring; present at upgradient location
Naturally occurring; does not exceed SWSL
Naturally occurring; does not exceed SWSL; ASD approved 05-26-10
Naturally occurring; does not exceed SWSL
Naturally occurring; does not exceed SWSL; ASD approved 05-26-10
Naturally occurring; does not exceed SWSL; ASD approved 05-26-10
Naturally occurring; does not exceed SWSL
Naturally occurring; does not exceed SWSL; ASD approved 03-30-11
Naturally occurring; does not exceed SWSL; ASD approved 03-30-11
Naturally occurring; does not exceed SWSL; ASD approved 03-30-11
Possible landfill impact; naturally occurring; ASD approved 03-30-11
Naturally occurring; does not exceed SWSL
Naturally occurring; does not exceed SWSL
Naturally occurring; does not exceed SWSL
Naturally occurring; does not exceed SWSL
Naturally occurring; does not exceed SWSL
Naturally occurring; does not exceed SWSL
CLIENT: THE COUNTY OF ORANGE
FACILITY: ORANGE COUNTY REGIONAL LANDFILL - SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
DATE OF SAMPLING: 11/10/15
CONSTITUENTS ATTAINING OR EXCEEDING THEIR GROUNDWATER QUALITY STANDARDS
ANALYSIS*
Naturally occurring; does not exceed SWSL
Naturally occurring; does not exceed SWSL
Naturally occurring; does not exceed SWSL
Naturally occurring; does not exceed SWSL
Naturally occurring; does not exceed SWSL
Naturally occurring; does not exceed SWSL
Naturally occurring; does not exceed SWSL
Naturally occurring; does not exceed SWSL
Naturally occurring; does not exceed SWSL
Naturally occurring; does not exceed SWSL
Possible landfill impact; naturally occurring; concentration less than FBAC (447 ug/l)
Naturally occurring; does not exceed SWSL
Naturally occurring; does not exceed SWSL
Naturally occurring; does not exceed SWSL
J - constituent was less than its Solid Waste Section Limit (SWSL)
LEACHATE MONITORING DATA
Possible landfill impact; naturally occurring; ASD approved 03-30-11
Naturally occurring; does not exceed SWSL
Naturally occurring; does not exceed SWSL
Naturally occurring; does not exceed SWSL
Naturally occurring
Naturally occurring; does not exceed SWSL
Naturally occurring; does not exceed SWSL
Naturally occurring; does not exceed SWSL
Naturally occurring; does not exceed SWSL
Naturally occurring; does not exceed SWSL
Naturally occurring; does not exceed SWSL
Naturally occurring; does not exceed SWSL
Naturally occurring; does not exceed SWSL
Naturally occurring; does not exceed SWSL; ASD approved 05-26-10

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 South sanitary landfill consists of thirteen wells:

Upgradient: 6801-MW110S
6801-MW110D

Downgradient: 6801-MW101
6801-MW102S
6801-MW102DR
6801-MW103S
6801-MW103D
6801-MW104
6801-MW105
6801-MW106
6801-MW107
6801-MW111
6801-MW112

Note. Well 6801-MW110S and 6801-MW110D are hydrogeologically upgradient of South landfill
(and serve as background wells for that waste management unit), but hydrogeologically
downgradient of the C&D landfill.

NORTH SOUTH ACTIVE
Well LANDFILL LANDFILL C&D LANDFILL
6801-MW-04 X X
6801-MW-06R X
6801-MW-07R X
6801-MW-14A X
6801-MW-14B X
6801-MW-15 X
6801-MW-16 X
6801-MW-17 X
6801-MW-20 X
6801-MW-21D X
6801-MW-21S X
6801-MW-22 X
6801-MW-23 X
6801-MW-24 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 elevation elevation elevation elevation
well type of diameter depth to top to top well ground concrete measuring point top steel
designation well northing easting borehole borehole sand bentonite depth stickup surface pad (top PVC wellpipe)casing
6801-MW101 2MW15 807314.1519 1975988.981 0.5 35 18 16 38.33 1.98 506.98 n 509.25 n
6801-MW102S 2MW15 807433.0189 1976435.981 0.5 25 8 6 27.79 1.95 495.06 n 497.3 n
6801-MW102D 2MW15 807424.6914 1976408.348 0.5 55 38 36 57.44 1.76 495.71 n 497.76 n
6801-MW102DR 2MW15 807417.3978 1976401.856 0.5 55 37 34 57.5 2.5 497.62 496.27 498.03 n
6801-MW103S 2MW15 807140.3758 1976636.687 0.5 35 18 16 37.98 2 495.28 n 497.57 n
6801-MW103D 2MW15 807150.1994 1976625.012 0.5 65 48 46 68.51 2.25 496 n 498.54 n
6801-MW104 2MW15 807258.9678 1976833.533 0.5 35 18 16 38.14 1.89 492.72 n 494.91 n
6801-MW105 2MW10 806744.4377 1976394.117 0.5 33.2 21 19 37.92 2.55 505.8 n 508.64 n
6801-MW106 2MW15 806420.8434 1976235.515 0.5 41.3 17.5 15.4 37.64 1.95 507.22 n 509.53 n
6801-MW107 2MW15 806171.0616 1975892.314 0.5 35 18 16 37.29 1.81 514.36 n 516.46 n
6801-MW108 2MW15 806095.0991 1975391.204 0.5 35 18 16 37.26 2.09 530.36 n 532.74 n
6801-MW109 2MW15 806489.4212 1974988.226 0.5 30 8 6 27.59 2.06 521.58 n 523.93 n
6801-MW110S 2MW15 807019.1106 1974956.856 0.5 40 18 16 38.31 2.04 537.91 n 540.24 n
6801-MW110D 2MW15 807026.571 1974966.137 0.5 70 52.5 50 70.85 2.01 537.88 n 540.18 n
6801-MW111 2MW15 807183.79 1975489.483 0.5 35 18 16 38.46 1.91 522.1 n 524.31 n
6801-MW112 2MW10 806877.74 1976549.9 0.33 35 21 8 38 3 500.72 n 503.72 n
stick-up = elevation of measuring point - elevation of concrete pad
2MW15 means "2-inch well pipe with 15 feet of well screen" = well abandoned
n = data not available.
P:\R00\500\R00592\R00592-79\Reports\tables\wellspx.R00592.xls
WELL SPECIFICATIONS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: MONITORING WELL CONSTRUCTION

ATTACHMENT 3

GROUNDWATER ELEVATION DATA
ATTACHMENT 3

GROUNDWATER ELEVATION DATA

Static water elevations obtained during the sampling event indicate that wells 6801-MW110S and
6801-MW110D remain hydrogeologically upgradient from all disposal areas within the landfill
facility and upgradient from all other wells.

With regard to wells screened within the uppermost portion of the aquifer underlying the facility,
the elevation of the water table was found to vary from a high of 517.28 feet above mean sea
level (upgradient monitoring well 6801-MW110S) to a low of 479.58 feet above mean sea level
(downgradient monitoring well 6801-MW104).

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: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
STATIC WATER LEVELS
DATE: 11-10-15
WELL ELEVmp DTW STICKUP DTWc ELEVgs ELEVgw
6801-MW101 509.25 12.92 2.27 10.65 506.98 496.33
6801-MW102dr 498.03 6.35 2.50 3.85 497.62 491.68
6801-MW102s 497.30 4.53 2.24 2.29 495.06 492.77
6801-MW103d 498.54 13.10 2.54 10.56 496.00 485.44
6801-MW103s 497.57 11.93 2.29 9.64 495.28 485.64
6801-MW104 494.91 15.33 2.19 13.14 492.72 479.58
6801-MW105 508.64 21.86 2.84 19.02 505.80 486.78
6801-MW106 509.53 16.92 2.31 14.61 507.22 492.61
6801-MW107 516.46 16.13 2.10 14.03 514.36 500.33
6801-MW108 532.74 2.38 530.36
6801-MW109 523.93 2.35 521.58
6801-MW110d 540.18 29.91 2.30 27.61 537.88 510.27
6801-MW110s 540.24 22.96 2.33 20.63 537.91 517.28
6801-MW111 524.31 26.62 2.21 24.41 522.10 497.69
6801-MW112 503.72 17.44 3.00 14.44 500.72 486.28
NOTES:
Upgradient wells shaded yellow.
Elevations expressed in feet above mean sea level.
R00592-164
DATE MW-101 MW-102d MW-102dr MW-102s MW-103d MW-103s MW-104 MW-105 MW-106 MW-107 MW-108 MW-109 MW-110d MW-110s MW-111 MW-112
Elves 506.98 495.71 496.27 495.06 496.00 495.28 492.72 505.80 507.22 514.36 530.36 521.58 537.88 537.91 522.10 500.72
Elemi 509.25 497.76 498.03 497.30 498.54 497.57 494.91 508.64 509.53 516.46 532.74 523.93 540.18 540.24 524.31 503.72
06/18/93 484.44
06/22/93 484.24
06/29/93 483.93
01/25/94 485.61
05/25/94 484.63
03/22/95 481.69 489.11 489.50 484.63 484.77 477.98 479.65 490.87 497.93 511.23 517.45 511.13 512.47 497.58
05/09/95 485.98 484.35 484.38 483.44 482.94 477.75 484.14 488.20 495.24 506.90 509.51 515.55 495.40
05/18/95 485.38 483.76 483.78 483.31 482.80 477.65 483.96 487.73 494.46 522.27 509.55 515.39 495.86
07/20/95 488.90 487.18 487.18 483.87 483.52 477.80 484.79 488.87 496.54 508.37 511.08 516.99 496.59
11/28/95 489.95 487.98 488.05 484.54 483.82 478.21 485.32 489.80 497.77 509.47 515.92 511.56 517.31 496.71
02/28/96 493.28 490.44 490.50 485.17 484.56 478.39 486.11 491.24 498.89 514.79 521.35 513.65 520.92 498.96
08/07/96 484.82 482.24 482.28 482.71 482.08 477.28 483.58 486.98 493.13 503.60 510.90 510.25 516.69 495.77
08/27/96 484.73 481.38 481.49 482.29 481.82 476.98 483.13 486.66 492.19 502.19 509.73 509.34 515.82 493.29
02/27/97 495.29 488.61 490.85 485.02 484.47 477.92 486.19 491.12 499.15 515.60 521.43 509.63 521.55 498.64
09/04/97 484.93 482.00 482.10 482.21 481.70 476.69 483.22 486.86 493.04 502.39 509.92 507.83 515.04 494.06
03/25/98 497.90 491.46 491.55 486.44 485.70 479.77 487.98 494.63 501.29 520.14 521.93 515.28 522.77 501.09
11/02/98 486.10 482.76 481.70 482.12 481.77 477.29 483.46 486.93 491.36 500.84 506.33 506.83 512.93 493.10
04/27/99 488.25 486.31 486.38 484.29 483.75 478.74 485.31 489.83 497.31 508.74 515.41 511.18 517.68 496.11
11/22/99 487.65 485.76 485.84 484.24 483.57 478.66 485.29 489.58 496.78 507.73 513.52 511.26 517.79 495.74
05/24/00 490.73 488.29 488.40 484.79 484.05 479.15 485.82 490.86 497.80 510.54 519.13 512.90 520.63 496.54
11/30/00 484.88 483.00 482.97 483.24 482.57 478.31 484.24 487.68 493.76 502.09 511.36 508.97 515.74 494.59
05/30/01 487.90 485.58 485.66 484.02 483.05 478.72 484.99 489.02 496.31 507.21 511.36 510.93 518.04 496.01
11/14/01 484.26 479.61 479.63 481.81 481.24 479.87 483.00 486.23 491.16 500.55 508.33 506.48 512.84 493.73
06/06/02 484.63 480.80 481.20 482.34 482.02 476.90 483.49 487.22 493.34 500.89 511.11 507.23 513.69 494.18
03/13/03 493.33 490.04 490.09 485.31 484.96 479.83 486.79 492.08 500.36 512.12 520.77 513.23 519.74 498.81
06/19/03 493.49 489.86 489.95 485.19 484.67 479.43 486.39 491.61 500.27 511.12 520.83 514.55 522.04 497.41
12/09/03 490.30 486.13 483.90 483.69 482.95 478.07 484.64 488.64 495.67 501.35 512.54 510.37 517.09 495.91
06/23/04 485.33 485.30 483.00 483.34 482.36 477.66 488.63 488.38 496.46 505.43 514.38 501.48 517.35 495.31
12/01/04 489.62 489.66 487.72 484.37 483.81 479.21 490.39 490.30 497.96 503.49 515.83 510.40 517.64 497.51
06/06/05 488.59 488.18 486.03 484.24 483.33 478.88 485.34 489.63 498.15 507.72 517.08 510.78 518.52 497.01
11/03/05 484.35 482.44 480.00 481.92 480.87 476.53 482.96 486.48 491.66 500.50 508.21 505.66 512.62 494.16
05/24/06 485.29 485.20 482.89 483.23 482.53 477.42 484.42 487.63 495.19 501.07 512.53 507.89 515.04 495.45
11/15/06 489.99 489.48 487.59 483.97 483.44 478.43 484.90 488.95 495.87 500.72 510.95 507.07 512.63 496.38
06/14/07 486.71 486.30 484.04 483.60 482.48 477.60 484.90 489.30 496.45 515.06 514.25 508.56 516.41 495.67
12/11/07 483.97 481.19 478.89 480.33 479.45 475.86 481.05 484.73 490.24 499.94 505.24 503.69 510.13 497.50
06/09/08 486.60 486.25 483.98 483.42 482.49 477.90 484.74 488.66 497.41 503.04 513.02 507.73 514.63 495.80
11/06/08 485.62 485.49 483.55 483.86 480.72 477.10 484.04 487.60 495.00 500.42 510.34 506.27 513.27 498.20
05/20/09 488.71 487.90 485.68 484.19 483.25 477.71 485.73 489.78 498.59 509.70 516.76 496.66
10/20/09 484.34 483.00 480.52 481.60 480.32 476.39 482.60 486.50 492.55 512.43 493.96 482.60
06/23/10 488.21 487.39 485.10 482.93 482.81 477.55 485.42 489.41 497.93 509.58 516.37 496.01
11/17/10 484.99 482.81 482.67 482.60 481.39 477.19 483.72 487.15 493.23 505.93 513.04 494.20
05/25/11 487.12 486.84 484.58 483.60 482.77 477.49 484.96 487.30 496.83 508.66 515.29 496.15 484.77
11/16/11 484.51 483.92 481.54 481.31 480.28 476.73 482.31 486.13 490.73 504.68 511.10 493.77 482.38
06/07/12 488.03 487.20 484.96 483.52 481.70 477.85 484.99 489.55 496.76 509.06 515.52 496.25 484.57
11/14/12 485.22 485.21 482.90 482.59 481.67 477.01 483.78 487.93 494.04 506.66 513.66 494.76 483.58
05/14/13 490.95 490.24 488.33 484.90 484.51 478.30 486.69 492.35 500.33 510.85 517.04 497.11 485.82
11/13/13 486.15 485.99 483.60 483.50 482.61 477.26 484.96 489.29 496.66 509.15 516.72 495.13 484.47
05/14/14 492.10 490.79 488.60 485.46 484.77 478.26 487.62 493.65 502.56 512.58 521.52 498.90 486.49
11/12/14 484.70 484.70 482.16 482.70 481.49 477.59 483.81 487.88 493.40 506.98 514.27 494.47 483.62
05/13/15 490.45 487.51 487.20 485.09 484.37 478.13 487.21 492.38 500.81 511.92 519.42 496.05 486.28
11/10/15 496.33 491.68 492.77 485.44 485.64 479.58 486.78 492.61 500.33 510.27 517.28 497.69 486.28
MIN 481.69 479.61 481.19 478.89 480.33 479.45 475.86 479.65 484.73 490.24 499.94 505.24 501.48 510.13 493.10 482.38
MEDIAN 486.92 485.76 486.25 484.48 483.60 482.81 477.83 484.79 488.91 496.50 506.17 513.02 509.55 516.39 496.01 484.57
MEAN 487.88 485.74 486.43 485.12 483.62 482.87 477.94 484.83 489.05 496.15 506.80 513.83 509.30 516.25 496.09 484.62
MAX 497.90 491.46 491.68 492.77 486.44 485.70 479.87 490.39 494.63 502.56 522.27 521.93 515.28 522.77 501.09 486.49
STD 3.59 3.47 2.62 3.39 1.26 1.44 0.94 1.89 2.15 3.04 6.02 4.61 2.79 2.96 1.68 1.40
RANGE 16.21 11.85 10.49 13.88 6.11 6.25 4.01 10.74 9.90 12.32 22.33 16.69 13.80 12.64 7.99 4.11
R00592-164
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF STATIC WATER ELEVATIONS
Upgradient wells shaded yellow.
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
LOCATION: CHAPEL HILL, NORTH CAROLINA
Elevation in feet above sea level.
FACILITY: SOUTH FACILITY
475
480
485
490
495
500
505
510
515
520
525
st
a
t
i
c

w
a
t
e
r

e
l
e
v
a
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i
o
n

(f
t

a
b
o
v
e

s
e
a

l
e
v
e
l
)
Date
Orange County Solid Waste Management -South Facility
static water elevations
MW-101 MW-102d MW-103d MW-103s MW-104 MW-105 MW-106
MW-107 MW-108 MW-109 MW-110d MW-110s MW-111 MW-102dr
500
505
510
515
520
525
st
a
t
i
c

w
a
t
e
r

e
l
e
v
a
t
i
o
n

(f
t

a
b
o
v
e

s
e
a

l
e
v
e
l
)
Date
Orange County Solid Waste Management -South Facility
static water elevations
MW-110s MW-110d
direction of
vertical
gradient
495
500
505
510
515
520
525
st
a
t
i
c

w
a
t
e
r

e
l
e
v
a
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i
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n

(f
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a
b
o
v
e

s
e
a

l
e
v
e
l
)
Date
Orange County Solid Waste Management -South Facility
static water elevations
MW-108 MW-109 MW-110s
wells at upgradient (west) end of landfill
475
480
485
490
495
500
505
510
515
520
525
st
a
t
i
c

w
a
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e
r

e
l
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v
a
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n

(f
t

a
b
o
v
e

s
e
a

l
e
v
e
l
)
Date
Orange County Solid Waste Management -South Facility
static water elevations
MW-110s MW-101 MW-102s
wells along north side of landfill
475
480
485
490
495
500
505
510
515
520
525
st
a
t
i
c

w
a
t
e
r

e
l
e
v
a
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o
n

(f
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a
b
o
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e

s
e
a

l
e
v
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l
)
Date
Orange County Solid Waste Management -South Facility
static water elevations
MW-108 MW-107 MW-106 MW-105 MW-103s MW-104
wells along southeast side of landfill

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

Hydraulic parameters for wells associated with the subject facility are summarized on the table
provided at the end of this ATTACHMENT. Effective porosity values are estimated to range from
about 15% (bedrock) to 35% (saprolite).

Using groundwater elevations measured during the subject sampling event, the hydraulic gradient of
the uppermost aquifer was calculated along the flow path from well 6801-MW110S to well 6801-
MW104. The average hydraulic gradient was estimated by dividing the difference between the
hydraulic heads (elevation heads) in well 6801-MW110S and well 6801-MW104 by the distance
between those two wells (about 1,881 feet).

The hydraulic conductivity value derived from well 6801-MW104 (1.80 x 10-5 m/sec) was used to
calculate groundwater velocity along the flow path from well 6801-MW110S to well 6801-MW104
(being the larger conductivity observed among that particular pair of wells).

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

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 slightly lower than the median velocity (along the selected flow path).

Groundwater Velocity Calculations
Page 2

A review of groundwater velocity over time (see graph) indicates that velocity generally
increased, between late 2011 and early 2014, then appears to have oscillated (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.
Well Screened Interval
Hydraulic Conductivity
(cm/s)
Hydraulic Conductivity
(m/s)Porosity
MW-101 bedrock 2.30E-04 2.30E-06 0.15
MW-102D bedrock 3.00E-04 3.00E-06 0.15
MW-102S bedrock 3.00E-04 3.00E-06 0.15
MW-103D bedrock 2.60E-03 2.60E-05 0.15
MW-103S saprolite 1.30E-03 1.30E-05 0.35
MW-104 bedrock 1.80E-03 1.80E-05 0.15
MW-105 saprolite 6.82E-04 6.82E-06 0.35
MW-106 bedrock 5.00E-05 5.00E-07 0.15
MW-107 bedrock 3.10E-03 3.10E-05 0.15
MW-108 saprolite 9.00E-04 9.00E-06 0.35
MW-109 bedrock 3.40E-04 3.40E-06 0.15
MW-110D bedrock 1.90E-04 1.90E-06 0.15
MW-110S bedrock 6.20E-04 6.20E-06 0.15
MW-111 bedrock 1.50E-05 1.50E-07 0.15
HYDRAULIC PARAMETERS
CLIENT: THE COUNTY OF ORANGE
FACILITY: ORANGE COUNTY LANDFILL - SOUTH 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
05/25/11 6801-MW110s 515.29 6801-MW104 477.49 2.01E-02 76.0 249.5
11/16/11 6801-MW110s 511.10 6801-MW104 476.73 1.83E-02 69.1 226.9
06/07/12 6801-MW110s 515.52 6801-MW104 477.85 2.00E-02 75.8 248.6
11/14/12 6801-MW110s 513.66 6801-MW104 477.01 1.95E-02 73.7 241.9
05/14/13 6801-MW110s 517.04 6801-MW104 478.30 2.06E-02 77.9 255.7
11/13/13 6801-MW110s 516.72 6801-MW104 477.26 2.10E-02 79.4 260.5
05/14/14 6801-MW110s 521.52 6801-MW104 478.26 2.30E-02 87.0 285.5
11/12/14 6801-MW110s 514.27 6801-MW104 477.59 1.95E-02 73.8 242.1
05/13/15 6801-MW110s 519.42 6801-MW104 478.13 2.20E-02 83.1 272.5
11/10/15 6801-MW110s 517.28 6801-MW104 479.58 2.00E-02 75.8 248.8
median = 75.9 249.2
deviation from mean = -0.1%
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
GROUNDWATER VELOCITY CALCULATIONS
220
230
240
250
260
270
280
290
fe
e
t

p
e
r

y
e
a
r
date measured
OCSWM South Landfill: groundwater velocity
median

ATTACHMENT 5

SUMMARY OF ORGANIC CONSTITUENTS

ATTACHMENT 5

ORGANIC CONSTITUENTS

During November 10, 2015 (sampling event 43), Sherrill Environmental personnel obtained
groundwater samples from thirteen groundwater monitoring wells at the Orange County Solid
Waste Management South Facility (south side of Eubanks Road).

During the November, 2015, sampling event, the laboratory did not detect any targeted organic
constituents.

Discussion. During all sampling events, through event 25 (except event 12, in which the
reported occurrence of toluene in one upgradient well was deemed suspect), the laboratory did
not detect any organic constituents in groundwater at the subject facility.

Beginning with the November, 2006, sampling event, the laboratory began to observe a number
of volatile organic compounds in several monitoring wells:
 benzene
 chlorobenzene
 chloroethane
 cis-1,2-dichloroethene
 1,1-dichloroethane
 trichloroethene
 vinyl chloride

The laboratory was not able to quantify the concentrations of most occurrences, and a
considerable majority of the reported occurrences were observed in a single well (6801-
MW105). The constituents that occurred most frequently in well 6801-MW105 reached their
maximum concentrations during 2012, after which they began decreasing, and essentially
disappeared by early 2013.

In response to the initial occurrences of volatile organic constituents in well 6801-MW105,
OCSWM constructed well 6801-MW112 approximately 190 feet downgradient of well 6801-
MW105. The laboratory has detected only trace levels (less than 1 ppb) of several volatile
organic compounds in well 6801-MW112.

GRAPHS

0.0
0.2
0.4
0.6
0.8
1.0
1.2
co
n
c
e
n
t
r
a
t
i
o
n

(
p
p
b
)
date sampled
OCSWM -SOUTH -BENZENE
MW-105 MW-112
<RL represented by 1/2RL
MCL = 5 ppb
0.0
0.2
0.4
0.6
0.8
1.0
co
n
c
e
n
t
r
a
t
i
o
n

(
p
p
b
)
date sampled
OCSWM -SOUTH -1,1 DICHLOROETHANE
MW-105 MW-112
<RL represented by 1/2 RL
MCL= not established
0.0
0.5
1.0
1.5
2.0
2.5
co
n
c
e
n
t
r
a
t
i
o
n

(
p
p
b
)
date sampled
OCSWM -SOUTH -cis-1,2-DICHLOROETHENE
MW-105 MW-112
<RL represented by 1/2 RL
MCL= not established
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
co
n
c
e
n
t
r
a
t
i
o
n

(
p
p
b
)
date sampled
OCSWM -SOUTH -VINYL CHLORIDE
MW-105 MW-112
<RL represented by 1/2 RL
MCL = 2 ppb
NCGQS = 0.03 PPB / SWSL = 1 ppb

TABLES

acetone 05/18/95
MCL = w 07/20/95
FBAC = 100 (SWSL)11/28/95
NCGQS = 6000 (2L Std)02/28/96
2L Std = 700 (pre- Jan. 2010)08/27/96
2L Std = 6000 (Jan. 2010)02/27/97
09/04/97
03/25/98
11/02/98
04/27/99
11/22/99
05/24/00
11/30/00
05/30/01
11/14/01
06/06/02
03/13/03
06/19/03
12/09/03
06/23/04
12/01/04
06/06/05
11/03/05
05/24/06
11/15/06
06/14/07
12/11/07 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 2.9 JB 1.2 100 f
06/09/08 <1.2 <1.2 <1.2 <1.2 <1.2 5.5 JB <1.2 1.2 100
11/06/08 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100 f
05/20/09 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
10/20/09 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
06/23/10 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
11/17/10 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
05/25/11 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
11/16/11 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
06/07/12 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
11/14/12 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
05/14/13 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
11/13/13 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
05/14/14 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
11/12/14 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
05/13/15 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
11/10/15 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 5.0 100
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
Constituent Sample Date MW-101 MW-102S MW-102D MW-102 DR MW-103D MW-104MW-103S
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
MW-105 LOD SWSL QA/QC
acetone 05/18/95
MCL = w 07/20/95
FBAC = 100 (SWSL)11/28/95
NCGQS = 6000 (2L Std)02/28/96
2L Std = 700 (pre- Jan. 2010)08/27/96
2L Std = 6000 (Jan. 2010)02/27/97
09/04/97
03/25/98
11/02/98
04/27/99
11/22/99
05/24/00
11/30/00
05/30/01
11/14/01
06/06/02
03/13/03
06/19/03
12/09/03
06/23/04
12/01/04
06/01/05
11/03/05
05/24/06
11/15/06
06/14/07
12/11/07 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100 f
06/09/08 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
11/06/08 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100 f
05/20/09 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
10/20/09 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
06/23/10 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
11/17/10 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
05/25/11 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
11/16/11 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
06/07/12 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
11/14/12 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
05/14/13 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
11/13/13 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
05/14/14 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
11/12/14 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
05/13/15 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
11/10/15 <5.0 <5.0 <5.0 <5.0 <5.0 5.0 100
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
LOD SWSL QA/QCMW-112MW-106 MW-107 MW-108
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
MW-110D MW-111ConstituentSample Date MW110S
benzene 05/18/95
MCL = 5 07/20/95
FBAC = 1 (SWSL)11/28/95
NCGQS = 1 (2L Std)02/28/96
08/27/96
02/27/97
09/04/97
03/25/98
11/02/98
04/27/99
11/22/99
05/24/00
11/30/00
05/30/01
11/14/01
06/06/02
03/13/03
06/19/03
12/09/03
06/23/04
12/01/04
06/06/05
11/03/05
05/24/06
11/15/06
06/14/07
12/11/07
06/09/08
11/06/08 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.2 J 0.1 1
05/20/09 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 0.2 1
10/20/09 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 0.2 1
06/23/10 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 0.05 1
11/17/10 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 0.2 1
05/25/11 <0.68 <0.68 <0.68 <0.68 <0.68 <0.68 0.7 J 0.68 1
11/16/11 <0.68 <0.68 <0.68 <0.68 <0.68 <0.68 <0.68 0.68 1
06/07/12 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 1.1 0.15 1
verification event 07/19/12 0.83 J 0.15 1
11/14/12 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 0.62 J 0.15 1
05/14/13 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 1
11/13/13 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 1
05/14/14 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 1
11/12/14 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 1
05/13/15 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 1
11/10/15 <0.71 <0.71 <0.71 <0.71 <0.71 <0.71 <0.71 0.71 1
QA/QCMW-103S
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
Constituent Sample Date MW-101 MW-102S MW-102D MW-102 DR MW-103D MW-104 MW-105 LOD SWSL
benzene 05/18/95
MCL = 5 07/20/95
FBAC = 1 (SWSL)11/28/95
NCGQS = 1 (2L Std)02/28/96
08/27/96
02/27/97
09/04/97
03/25/98
11/02/98
04/27/99
11/22/99
05/24/00
11/30/00
05/30/01
11/14/01
06/06/02
03/13/03
06/19/03
12/09/03
06/23/04
12/01/04
06/01/05
11/03/05
05/24/06
11/15/06
06/14/07
12/11/07 <0.5 <0.5 <0.5 <0.5 <0.5 0.5 100
06/09/08 <0.5 <0.5 <0.5 <0.5 <0.5 0.5 100
11/06/08 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
05/20/09 <0.2 <0.2 <0.2 <0.2 <0.2 0.2 1
10/20/09 <0.2 <0.2 <0.2 <0.2 <0.2 0.2 1
06/23/10 <0.05 <0.05 <0.05 <0.05 <0.05 0.05 1
11/17/10 <0.2 <0.2 <0.2 <0.2 <0.2 0.2 1
05/25/11 <0.68 <0.68 <0.68 <0.68 <0.68 <0.68 0.68 1
11/16/11 <0.68 <0.68 <0.68 <0.68 <0.68 <0.68 0.68 1
06/07/12 <0.15 <0.15 <0.15 <0.15 <0.15 0.41 J 0.15 1
verification event 07/19/12 0.15 1
11/14/12 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 1
05/14/13 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 1
11/13/13 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 1
05/14/14 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 1
11/12/14 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 1
05/13/15 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 1
11/10/15 <0.71 <0.71 <0.71 <0.71 <0.71 0.71 1
SWSLConstituentSample Date MW-106 MW-107 MW-108 MW-110D QA/QCMW-112MW-111 LODMW110S
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
carbon disulfide 05/18/95
MCL = w 07/20/95
FBAC = 100 (SWSL)11/28/95
NCGQS = 700 (2L Std)02/28/96
08/27/96
02/27/97
09/04/97
03/25/98
11/02/98
04/27/99
11/22/99
05/24/00
11/30/00
05/30/01
11/14/01
06/06/02
03/13/03
06/19/03
12/09/03
06/23/04
12/01/04
06/06/05
11/03/05
05/24/06
11/15/06
06/14/07
12/11/07 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 3.2 J 0.5 100
06/09/08 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 0.5 100
11/06/08 <0.5 1.6 J 1.1 J <0.5 <0.5 <0.5 0.8 J 0.5 100
05/20/09 <0.54 <0.54 <0.54 <0.54 <0.54 <0.54 <0.54 0.54 100
10/20/09 <0.54 <0.54 <0.54 <0.54 <0.54 <0.54 <0.54 0.54 100
06/23/10 <0.54 <0.54 <0.54 <0.54 <0.54 <0.54 <0.54 0.54 100
11/17/10 <0.54 <0.54 <0.54 <0.54 <0.54 <0.54 <0.54 0.54 100
05/25/11 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
11/16/11 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
06/07/12 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
11/14/12 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
05/14/13 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
11/13/13 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
05/14/14 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
11/12/14 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
05/13/15 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
11/10/15 <2.6 <2.6 <2.6 <2.6 <2.6 <2.6 <2.6 2.6 100
MW-103S QA/QCMW-103D MW-104 MW-105 LOD SWSL
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
Constituent Sample Date MW-101 MW-102S MW-102D MW-102 DR
carbon disulfide 05/18/95
MCL = w 07/20/95
FBAC = 100 (SWSL)11/28/95
NCGQS = 700 (2L Std)02/28/96
08/27/96
02/27/97
09/04/97
03/25/98
11/02/98
04/27/99
11/22/99
05/24/00
11/30/00
05/30/01
11/14/01
06/06/02
03/13/03
06/19/03
12/09/03
06/23/04
12/01/04
06/01/05
11/03/05
05/24/06
11/15/06
06/14/07
12/11/07 <0.5 <0.5 <0.5 <0.5 <0.5 0.5 100
06/09/08 <0.5 <0.5 <0.5 <0.5 <0.5 0.5 100
11/06/08 <0.5 <0.5 <0.5 <0.5 <0.5 0.5 100
05/20/09 <0.54 <0.54 <0.54 <0.54 <0.54 0.54 100
10/20/09 <0.54 <0.54 <0.54 <0.54 <0.54 0.54 100
06/23/10 <0.54 <0.54 <0.54 <0.54 <0.54 0.54 100
11/17/10 <0.54 <0.54 <0.54 <0.54 <0.54 0.54 100
05/25/11 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
11/16/11 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
06/07/12 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
11/14/12 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
05/14/13 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
11/13/13 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
05/14/14 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
11/12/14 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
05/13/15 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
11/10/15 <2.6 <2.6 <2.6 <2.6 <2.6 2.6 100
MW-110D MW-111 LOD SWSL QA/QCConstituentSample Date MW-106 MW-107 MW-108 MW-112
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW110S
chlorobenzene 05/18/95
MCL = 100 07/20/95
FBAC = 3 (SWSL)11/28/95
NCGQS = 50 (2L Std)02/28/96
08/27/96
02/27/97
09/04/97
03/25/98
11/02/98
04/27/99
11/22/99
05/24/00
11/30/00
05/30/01
11/14/01
06/06/02
03/13/03
06/19/03
12/09/03
06/23/04
12/01/04
06/06/05
11/03/05
05/24/06
11/15/06
06/14/07
12/11/07 0.27 J <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 3
06/09/08 3 J <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 3 ic, cc
11/06/08 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 3
05/20/09 3.6 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 0.27 3
10/20/09 1.1 J <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 0.27 3
06/23/10 <0.069 <0.069 <0.069 <0.069 <0.069 <0.069 <0.069 0.069 3
11/17/10 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 0.27 3
05/25/11 <0.74 <0.74 <0.74 <0.74 <0.74 <0.74 <0.74 0.74 3
11/16/11 <0.74 <0.74 <0.74 <0.74 <0.74 <0.74 <0.74 0.74 3
06/07/12 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 3
11/14/12 1.3 J <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 3
05/14/13 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 3
11/13/13 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 3
05/14/14 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 3
11/14/14 1.4 J <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 3
05/13/15 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 3
11/10/15 <0.72 <0.72 <0.72 <0.72 <0.72 <0.72 <0.72 0.72 3
Constituent Sample Date MW-101 MW-102S MW-102D MW-102 DR MW-103D MW-104 MW-105 LOD SWSL QA/QCMW-103S
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
chlorobenzene 05/18/95
MCL = 100 07/20/95
FBAC = 3 (SWSL)11/28/95
NCGQS = 50 (2L Std)02/28/96
08/27/96
02/27/97
09/04/97
03/25/98
11/02/98
04/27/99
11/22/99
05/24/00
11/30/00
05/30/01
11/14/01
06/06/02
03/13/03
06/19/03
12/09/03
06/23/04
12/01/04
06/01/05
11/03/05
05/24/06
11/15/06
06/14/07
12/11/07 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 3
06/09/08 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 3 ic, cc
11/06/08 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 3
05/20/09 <0.27 <0.27 <0.27 <0.27 <0.27 0.27 3
10/20/09 <0.27 <0.27 <0.27 <0.27 <0.27 0.27 3
06/23/10 <0.069 <0.069 <0.069 <0.069 <0.069 0.069 3
11/17/10 <0.27 <0.27 <0.27 <0.27 <0.27 0.27 3
05/25/11 <0.74 <0.74 <0.74 <0.74 <0.74 <0.74 0.74 3
11/16/11 <0.74 <0.74 <0.74 <0.74 <0.74 <0.74 0.74 3
06/07/12 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 3
11/14/12 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 3
05/14/13 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 3
11/13/13 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 3
05/14/14 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 3
11/14/14 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 3
05/13/15 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 3
11/10/15 <0.72 <0.72 <0.72 <0.72 <0.72 0.72 3
LODMW-112MW-106 MW-107 MW-108 MW-110D MW-111ConstituentSample Date
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
MW110S SWSL QA/QC
chloroethane 05/18/95
MCL = w 07/20/95
FBAC = 10 (SWSL)11/28/95
NCGQS = 3000 (2L Std)02/28/96
2L Std = NE (pre- Jan. 2010)08/27/96
2L Std = 3000 (Jan. 2010)02/27/97
09/04/97
03/25/98
11/02/98
04/27/99
11/22/99
05/24/00
11/30/00
05/30/01
11/14/01
06/06/02
03/13/03
06/19/03
12/09/03
06/23/04
12/01/04
06/06/05
11/03/05
05/24/06
11/15/06
06/14/07 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 2.6 J 0.1 10 ic, cc
12/11/07 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.4 J 0.1 10
06/09/08 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.8 J 0.1 10 ic, cc
11/06/08 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.7 J 0.1 10
11/12/08 0.87 J 0.3 10
05/20/09 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 0.3 10
10/20/09 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 0.56 J 0.3 10
06/23/10 <0.18 <0.18 <0.18 <0.18 <0.18 <0.18 <0.18 0.18 10
11/17/10 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 0.62 J 0.3 10
05/25/11 <0.75 <0.75 <0.75 <0.75 <0.75 <0.75 0.76 J 0.75 10
11/16/11 <0.75 <0.75 <0.75 <0.75 <0.75 <0.75 <0.75 0.75 10
06/07/12 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 0.23 10
11/14/12 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 0.23 10
05/14/13 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 0.23 10
11/13/13 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 0.23 10
05/14/14 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 0.23 10
11/12/14 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 0.23 10
05/13/15 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 0.23 10
11/10/15 <0.98 <0.98 <0.98 <0.98 <0.98 <0.98 <0.98 0.98 10
QA/QCMW-103D MW-104 MW-105 LOD SWSLConstituentSample Date MW-101 MW-102S MW-102D MW-102 DR
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
MW-103S
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
chloroethane 05/18/95
MCL = w 07/20/95
FBAC = 10 (SWSL)11/28/95
NCGQS = 3000 (2L Std)02/28/96
2L Std = NE (pre- Jan. 2010)08/27/96
2L Std = 3000 (Jan. 2010)02/27/97
09/04/97
03/25/98
11/02/98
04/27/99
11/22/99
05/24/00
11/30/00
05/30/01
11/14/01
06/06/02
03/13/03
06/19/03
12/09/03
06/23/04
12/01/04
06/01/05
11/03/05
05/24/06
11/15/06
06/14/07 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 10 ic, cc
12/11/07 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 10
06/09/08 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 10 ic, cc
11/06/08 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 10
11/12/08 0.3 10
05/20/09 <0.3 <0.3 <0.3 <0.3 <0.3 0.3 10
10/20/09 <0.3 <0.3 <0.3 <0.3 <0.3 0.3 10
06/23/10 <0.18 <0.18 <0.18 <0.18 <0.18 0.18 10
11/17/10 <0.3 <0.3 <0.3 <0.3 <0.3 0.3 10
05/25/11 <0.75 <0.75 <0.75 <0.75 <0.75 <0.75 0.75 10
11/16/11 <0.75 <0.75 <0.75 <0.75 <0.75 <0.75 0.75 10
06/07/12 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 0.23 10
11/14/12 <0.23 <0.23 <0.23 <0.23 <0.23 0.23 10
05/14/13 <0.23 <0.23 <0.23 <0.23 <0.23 0.23 10
11/13/13 <0.23 <0.23 <0.23 <0.23 <0.23 0.23 10
05/14/14 <0.23 <0.23 <0.23 <0.23 <0.23 0.23 10
11/12/14 <0.23 <0.23 <0.23 <0.23 <0.23 0.23 10
05/13/15 <0.23 <0.23 <0.23 <0.23 <0.23 0.23 10
11/10/15 <0.98 <0.98 <0.98 <0.98 <0.98 0.98 10
MW-110D MW-111 LOD SWSL QA/QCConstituentSample Date MW-106 MW-107 MW-108 MW-112
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW110S
chloromethane 05/18/95
MCL = w 07/20/95
FBAC = 1.0 (SWSL)11/28/95
NCGQS = 3 (2L Std)02/28/96
2L Std = 2.6 (pre- Jan. 2010)08/27/96
2L Std = 3 (Jan. 2010)02/27/97
09/04/97
03/25/98
11/02/98
04/27/99
11/22/99
05/24/00
11/30/00
05/30/01
11/14/01
06/06/02
03/13/03
06/19/03
12/09/03
06/23/04
12/01/04
06/06/05
11/03/05
05/24/06
11/15/06
06/14/07
12/11/07
06/09/08 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.4 J 0.1 1.0 ic, cc
11/06/08 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1.0 f
05/20/09 <0.34 <0.34 <0.34 <0.34 <0.34 <0.34 <0.34 0.34 1.0
10/20/09 <0.34 <0.34 <0.34 <0.34 <0.34 <0.34 <0.34 0.34 1.0
06/23/10 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 0.05 1
11/17/10 <0.34 <0.34 <0.34 <0.34 <0.34 <0.34 <0.34 0.34 1.0
05/25/11 <0.55 <0.55 <0.55 <0.55 <0.55 <0.55 <0.55 0.55 1
11/16/11 <0.55 <0.55 <0.55 <0.55 <0.55 <0.55 <0.55 0.55 1
06/07/12 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 0.13 1
11/14/12 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 0.13 1
05/14/13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 0.13 1
11/13/13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 0.13 1
05/14/14 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 0.13 1
11/12/14 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 0.13 1
05/13/15 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 0.13 1
11/10/15 <0.82 <0.82 <0.82 <0.82 <0.82 <0.82 <0.82 0.82 1
LOD SWSL QA/QC
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
Constituent Sample Date MW-101 MW-102S MW-102D MW-102 DR MW-103D MW-104MW-103S MW-105
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
chloromethane 05/18/95
MCL = w 07/20/95
FBAC = 1.0 (SWSL)11/28/95
NCGQS = 3 (2L Std)02/28/96
2L Std = 2.6 (pre- Jan. 2010)08/27/96
2L Std = 3 (Jan. 2010)02/27/97
09/04/97
03/25/98
11/02/98
04/27/99
11/22/99
05/24/00
11/30/00
05/30/01
11/14/01
06/06/02
03/13/03
06/19/03
12/09/03
06/23/04
12/01/04
06/01/05
11/03/05
05/24/06
11/15/06
06/14/07
12/11/07
06/09/08 0.5 J <0.1 <0.1 <0.1 <0.1 0.1 1.0 ic, cc
11/06/08 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1.0 f
05/20/09 <0.34 <0.34 <0.34 <0.34 <0.34 0.34 1.0
10/20/09 <0.34 <0.34 <0.34 <0.34 <0.34 0.34 1.0
06/23/10 <0.05 <0.05 <0.05 <0.05 <0.05 0.05 1
11/17/10 <0.05 <0.05 <0.05 <0.05 <0.05 0.05 1
05/25/11 <0.55 <0.55 <0.55 <0.55 <0.55 <0.55 0.55 1
11/16/11 <0.55 <0.55 <0.55 <0.55 <0.55 <0.55 0.55 1
06/07/12 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 0.13 1
11/14/12 <0.13 <0.13 <0.13 <0.13 <0.13 0.13 1
05/14/13 <0.13 <0.13 <0.13 <0.13 <0.13 0.13 1
11/13/13 <0.13 <0.13 <0.13 <0.13 <0.13 0.13 1
05/14/14 <0.13 <0.13 <0.13 <0.13 <0.13 0.13 1
11/12/14 <0.13 <0.13 <0.13 <0.13 <0.13 0.13 1
05/13/15 <0.13 <0.13 <0.13 <0.13 <0.13 0.13 1
11/10/15 <0.82 <0.82 <0.82 <0.82 <0.82 0.82 1
Constituent Sample Date LOD SWSL QA/QCMW-112MW-106 MW-107 MW-108 MW-110D
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
MW110S MW-111
1,1-dichloroethane 05/18/95
MCL = w 07/20/95
FBAC = 5 (SWSL)11/28/95
NCGQS = 6 (2L Std)02/28/96
2L Std = 70 (pre- Jan. 2010)08/27/96
2L Std = 6 (Jan. 2010)02/27/97
09/04/97
03/25/98
11/02/98
04/27/99
11/22/99
05/24/00
11/30/00
05/30/01
11/14/01
06/06/02
03/13/03
06/19/03
12/09/03
06/23/04
12/01/04
06/06/05
11/03/05
05/24/06
11/15/06
06/14/07 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 0.5 J 0.2 5 ic, cc
12/11/07 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 0.3 J 0.2 5
06/09/08 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 0.6 J 0.2 5 ic, cc
11/06/08 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 0.6 J 0.2 5
11/12/08 0.75 J 0.33 5
05/20/09 0.60 J <0.33 <0.33 <0.33 <0.33 <0.33 0.76 J 0.33 5
10/20/09 <0.33 <0.33 <0.33 <0.33 <0.33 <0.33 0.63 J 0.33 5
06/23/10 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 0.43 J 0.05 5
11/17/10 <0.33 <0.33 <0.33 <0.33 <0.33 <0.33 0.53 J 0.33 5
05/25/11 <0.08 <0.08 <0.08 <0.08 <0.08 <0.08 0.97 J 0.08 5
11/16/11 <0.08 <0.08 <0.08 <0.08 <0.08 <0.08 0.45 J 0.08 5
06/07/12 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 0.95 J 0.13 5
11/14/12 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 0.65 J 0.13 5
05/14/13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 0.13 5
11/13/13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 0.41 J 0.13 5
05/14/14 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 0.13 5
11/12/14 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 0.13 5
05/13/15 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 0.13 5
11/10/15 <0.62 <0.62 <0.62 <0.62 <0.62 <0.62 <0.62 0.62 5
LOCATION: CHAPEL HILL, NORTH CAROLINA
Constituent MW-105 LOD SWSL QA/QCMW-103SSample Date MW-101 MW-102S MW-102D MW-102 DR MW-103D MW-104
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
1,1-dichloroethane 05/18/95
MCL = w 07/20/95
FBAC = 5 (SWSL)11/28/95
NCGQS = 6 (2L Std)02/28/96
2L Std = 70 (pre- Jan. 2010)08/27/96
2L Std = 6 (Jan. 2010)02/27/97
09/04/97
03/25/98
11/02/98
04/27/99
11/22/99
05/24/00
11/30/00
05/30/01
11/14/01
06/06/02
03/13/03
06/19/03
12/09/03
06/23/04
12/01/04
06/01/05
11/03/05
05/24/06
11/15/06
06/14/07 <0.2 <0.2 <0.2 <0.2 <0.2 0.2 5 ic, cc
12/11/07 <0.2 <0.2 <0.2 <0.2 <0.2 0.2 5
06/09/08 <0.2 <0.2 <0.2 <0.2 <0.2 0.2 5 ic, cc
11/06/08 <0.2 <0.2 <0.2 <0.2 <0.2 0.2 5
11/12/08 0.33 5
05/20/09 <0.33 <0.33 <0.33 <0.33 <0.33 0.33 5
10/20/09 <0.33 <0.33 <0.33 <0.33 0.41 J 0.33 5
06/23/10 <0.05 <0.05 <0.05 <0.05 <0.05 0.05 5
11/17/10 <0.33 <0.33 <0.33 <0.33 <0.33 0.33 5
05/25/11 <0.08 <0.08 <0.08 <0.08 <0.08 0.49 J 0.08 5
11/16/11 <0.08 <0.08 <0.08 <0.08 <0.08 <0.08 0.08 5
06/07/12 <0.13 <0.13 <0.13 <0.13 <0.13 0.48 J 0.13 5
11/14/12 <0.13 <0.13 <0.13 <0.13 <0.13 0.13 5
05/14/13 <0.13 <0.13 <0.13 <0.13 <0.13 0.13 5
11/13/13 <0.13 <0.13 <0.13 <0.13 <0.13 0.13 5
05/14/14 <0.13 <0.13 <0.13 <0.13 <0.13 0.13 5
11/12/14 <0.13 <0.13 <0.13 <0.13 <0.13 0.13 5
05/13/15 <0.13 <0.13 <0.13 <0.13 <0.13 0.13 5
11/10/15 <0.62 <0.62 <0.62 <0.62 <0.62 0.62 5
LOCATION: CHAPEL HILL, NORTH CAROLINA
MW-106 MW-107 MW-108 MW-110D MW-111ConstituentSample Date QA/QCMW110S LOD SWSL
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
MW-112
cis-1,2-dichloroethene 05/18/95
MCL = 70 07/20/95
FBAC = 5 (SWSL)11/28/95
NCGQS = 70 (2L Std)02/28/96
08/27/96
02/27/97
09/04/97
03/25/98
11/02/98
04/27/99
11/22/99
05/24/00
11/30/00
05/30/01
11/14/01
06/06/02
03/13/03
06/19/03
12/09/03
06/23/04
12/01/04
06/06/05
11/03/05
05/24/06
11/15/06
06/14/07
12/11/07 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.4 J 0.1 5
06/09/08 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.8 J 0.1 5 ic, cc
11/06/08 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.8 J 0.1 5
11/12/08 0.72 J 0.36 5
05/20/09 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 1.0 J 0.36 5
10/20/09 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 0.51 J 0.36 5
06/23/10 <0.075 <0.075 <0.075 <0.075 <0.075 <0.075 0.85 J 0.075 5
11/17/10 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 0.41 J 0.36 5
05/25/11 <0.72 <0.72 <0.72 <0.72 <0.72 <0.72 1.7 J 0.72 5
11/16/11 <0.72 <0.72 <0.72 <0.72 <0.72 <0.72 <0.72 0.72 5
06/07/12 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 2.4 J 0.15 5
11/14/12 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 1 J 0.15 5
verification event 01/08/13 0.15 5
05/14/13 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 1 J 0.15 5
11/13/13 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 0.52 J 0.15 5
05/14/14 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 5
11/12/14 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 5
05/13/15 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 5
11/10/15 <0.53 <0.53 <0.53 <0.53 <0.53 <0.53 <0.53 0.53 5
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
SWSL
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
MW-104 MW-105 LOD
FACILITY: SOUTH FACILITY
MW-103D MW-103SConstituentSample Date MW-101 MW-102S MW-102D MW-102 DR QA/QC
cis-1,2-dichloroethene 05/18/95
MCL = 70 07/20/95
FBAC = 5 (SWSL)11/28/95
NCGQS = 70 (2L Std)02/28/96
08/27/96
02/27/97
09/04/97
03/25/98
11/02/98
04/27/99
11/22/99
05/24/00
11/30/00
05/30/01
11/14/01
06/06/02
03/13/03
06/19/03
12/09/03
06/23/04
12/01/04
06/01/05
11/03/05
05/24/06
11/15/06
06/14/07
12/11/07 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 5
06/09/08 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 5 ic, cc
11/06/08 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 5
11/12/08 0.36 5
05/20/09 <0.36 <0.36 <0.36 <0.36 <0.36 0.36 5
10/20/09 <0.36 <0.36 <0.36 <0.36 0.77 J 0.36 5
06/23/10 <0.075 <0.075 <0.075 <0.075 <0.075 0.075 5
11/17/10 <0.36 <0.36 <0.36 <0.36 <0.36 0.36 5
05/25/11 <0.72 <0.72 <0.72 <0.72 <0.72 0.81 J 0.72 5
11/16/11 <0.72 <0.72 <0.72 <0.72 <0.72 <0.72 0.72 5
06/07/12 <0.15 <0.15 <0.15 <0.15 <0.15 0.92 J 0.15 5
11/14/12 <0.15 0.79 J <0.15 <0.15 <0.15 0.15 5
verification event 01/08/13 <0.15 0.15 5
05/14/13 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 5
11/13/13 <0.15 0.42 J <0.15 <0.15 <0.15 0.15 5
05/14/14 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 5
11/12/14 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 5
05/13/15 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 5
11/10/15 <0.53 <0.53 <0.53 <0.53 <0.53 0.53 5
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW-110D
FACILITY: SOUTH FACILITY
MW-111 QA/QCConstituentSample Date MW-106 MW-107 MW-108 MW-112MW110S LOD SWSL
1,2-dichlorobenzene 05/18/95
MCL = 600 07/20/95
FBAC = 5 (SWSL)11/28/95
NCGQS = 20 (2L Std)02/28/96
2L Std = 24 (pre- Jan. 2010)08/27/96
2L Std = 20 (Jan. 2010)02/27/97
09/04/97
03/25/98
11/02/98
04/27/99
11/22/99
05/24/00
11/30/00
05/30/01
11/14/01
06/06/02
03/13/03
06/19/03
12/09/03
06/23/04
12/01/04
06/06/05
11/03/05
05/24/06
11/15/06
06/14/07
12/11/07
06/09/08
11/06/08
11/12/08
05/20/09 0.41 J <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 0.27 5
10/20/09 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 0.27 5
06/23/10 <0.052 <0.052 <0.052 <0.052 <0.052 <0.052 <0.052 0.052 5
11/17/10 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 0.27 5
05/25/11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 5
11/16/11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 5
06/07/12 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 5
11/14/12 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 5
05/14/13 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 5
11/13/13 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 5
05/14/14 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 5
11/12/14 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 5
05/13/15 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 5
11/10/15 <0.73 <0.73 <0.73 <0.73 <0.73 <0.73 <0.73 0.73 5
MW-102D MW-102 DR MW-103D MW-104 MW-105 LOD SWSL QA/QCConstituentSample Date MW-101 MW-102S
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
ORGANIC CONSTITUENTS
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
MW-103S
1,2-dichlorobenzene 05/18/95
MCL = 600 07/20/95
FBAC = 5 (SWSL)11/28/95
NCGQS = 20 (2L Std)02/28/96
2L Std = 24 (pre- Jan. 2010)08/27/96
2L Std = 20 (Jan. 2010)02/27/97
09/04/97
03/25/98
11/02/98
04/27/99
11/22/99
05/24/00
11/30/00
05/30/01
11/14/01
06/06/02
03/13/03
06/19/03
12/09/03
06/23/04
12/01/04
06/01/05
11/03/05
05/24/06
11/15/06
06/14/07
12/11/07
06/09/08
11/06/08
11/12/08
05/20/09 <0.27 <0.27 <0.27 <0.27 <0.27 0.27 5
10/20/09 <0.27 <0.27 <0.27 <0.27 <0.27 0.27 5
06/23/10 <0.052 <0.052 <0.052 <0.052 <0.052 0.052 5
11/17/10 <0.27 <0.27 <0.27 <0.27 <0.27 0.27 5
05/25/11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 5
11/16/11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 5
06/07/12 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 5
11/14/12 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 5
05/14/13 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 5
11/13/13 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 5
05/14/14 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 5
11/12/14 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 5
05/13/15 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 5
11/10/15 <0.73 <0.73 <0.73 <0.73 <0.73 0.73 5
LOD SWSL QA/QCMW-112ConstituentSample Date MW-106 MW-107 MW-108 MW-110D MW-111
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
ORGANIC CONSTITUENTS
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
MW110S
1,4-dichlorobenzene 05/18/95
MCL = 75 07/20/95
FBAC = 1 (SWSL)11/28/95
NCGQS = 6 (2L Std)02/28/96
2L Std = 1.4 (pre- Jan. 2010)08/27/96
2L Std = 6 (Jan. 2010)02/27/97
09/04/97
03/25/98
11/02/98
04/27/99
11/22/99
05/24/00
11/30/00
05/30/01
11/14/01
06/06/02
03/13/03
06/19/03
12/09/03
06/23/04
12/01/04
06/06/05
11/03/05
05/24/06
11/15/06
06/14/07
12/11/07
06/09/08
11/06/08
11/12/08
05/20/09 0.51 J <0.38 <0.38 <0.38 <0.38 <0.38 <0.38 0.38 1
10/20/09 <0.38 <0.38 <0.38 <0.38 <0.38 <0.38 <0.38 0.38 1
06/23/10 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
11/17/10 <0.38 <0.38 <0.38 <0.38 <0.38 <0.38 <0.38 0.38 1
05/25/11 <0.79 <0.79 <0.79 <0.79 <0.79 <0.79 <0.79 0.79 1
11/16/11 <0.79 <0.79 <0.79 <0.79 <0.79 <0.79 <0.79 0.79 1
06/07/12 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 1
11/14/12 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 1
05/14/13 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 1
11/13/13 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 1
05/14/14 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 1
11/12/14 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 1
05/13/15 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 1
11/10/15 <0.76 <0.76 <0.76 <0.76 <0.76 <0.76 <0.76 0.76 1
MW-102S MW-102D MW-102 DR MW-103D MW-104 MW-105 LOD SWSL QA/QC
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
Constituent Sample Date MW-101
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW-103S
1,4-dichlorobenzene 05/18/95
MCL = 75 07/20/95
FBAC = 1 (SWSL)11/28/95
NCGQS = 6 (2L Std)02/28/96
2L Std = 1.4 (pre- Jan. 2010)08/27/96
2L Std = 6 (Jan. 2010)02/27/97
09/04/97
03/25/98
11/02/98
04/27/99
11/22/99
05/24/00
11/30/00
05/30/01
11/14/01
06/06/02
03/13/03
06/19/03
12/09/03
06/23/04
12/01/04
06/01/05
11/03/05
05/24/06
11/15/06
06/14/07
12/11/07
06/09/08
11/06/08
11/12/08
05/20/09 <0.38 <0.38 <0.38 <0.38 <0.38 0.38 1
10/20/09 <0.38 <0.38 <0.38 <0.38 <0.38 0.38 1
06/23/10 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
11/17/10 <0.38 <0.38 <0.38 <0.38 <0.38 0.38 1
05/25/11 <0.79 <0.79 <0.79 <0.79 <0.79 <0.79 0.79 1
11/16/11 <0.79 <0.79 <0.79 <0.79 <0.79 <0.79 0.79 1
06/07/12 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 1
11/14/12 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 1
05/14/13 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 1
11/13/13 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 1
05/14/14 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 1
11/12/14 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 1
05/13/15 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 1
11/10/15 <0.76 <0.76 <0.76 <0.76 <0.76 0.76 1
MW-106 MW-107 MW-108ConstituentSample Date MW-110D MW-111
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
LOD SWSL QA/QC
ORGANIC CONSTITUENTS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW-112MW110S
toluene 05/18/95 <5 <5 <5 <5 <5 <5 <5
MCL = 1000 07/20/95 <5 <5 <5 <5 <5 <5 <5
FBAC = 1 (SWSL)11/28/95 <5 <5 <5 <5 <5 <5 <5
NCGQS = 600 (2L Std)02/28/96 <5 <5 <5 <5 <5 <5 <5
2L Std = 1000 (pre- Jan. 2010)08/27/96 <5 <5 <5 <5 <5 <5 <5
2L Std = 600 (Jan. 2010)02/27/97 <5 <5 <5 <5 <5 <5 <5
09/04/97 <5 <5 <5 <5 <5 <5 <5
03/25/98 <5 <5 <5 <5 <5 <5 <5
11/02/98 <5 <5 <5 <5 <5 <5 <5
04/27/99 <5 <5 <5 <5 <5 <5 <5
11/22/99 <5 <5 <5 <5 <5 <5 <5
05/24/00 <5 <5 <5 <5 <5 <5 <5
11/30/00 <5 <5 <5 <5 <5 <5 <5
05/30/01 <5 <5 <5 <5 <5 <5 <5
11/14/01 <5 <5 <5 <5 <5 <5 <5
06/06/02 <5 <5 <5 <5 <5 <5 <5
03/13/03 <5 <5 <5 <5 <5 <5 <5
06/19/03 <5 <5 <5 <5 <5 <5 <5
12/09/03 <5 <5 <5 <5 <5 <5 <5
06/23/04 <5 <5 <5 <5 <5 <5 <5
12/01/04 <5 <5 <5 <5 <5 <5 <5
06/06/05 <5 <5 <5 <5 <5 <5 <5
11/03/05 <5 <5 <5 <5 <5 <5 <5
05/24/06 <5 <5 <5 <5 <5 <5 <5
11/15/06 <5 <5 <5 <5 <5 <5 <5
06/14/07 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 0.3 1 ic, cc
12/11/07 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 0.3 1
06/09/08 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 0.3 1
11/06/08 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 0.3 1
05/20/09 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 0.27 1
10/20/09 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 0.27 1
06/23/10 <0.053 <0.053 <0.053 <0.053 <0.053 <0.053 <0.053 0.053 1
11/17/10 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 0.27 1
05/25/11 <0.85 <0.85 <0.85 <0.85 <0.85 <0.85 <0.85 0.85 1
11/16/11 <0.85 <0.85 <0.85 <0.85 <0.85 <0.85 <0.85 0.85 1
06/07/12 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 1
11/14/12 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 1
05/14/13 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 1
11/13/13 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 1
05/14/14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 1
11/12/14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 1
05/13/15 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 1
11/10/15 <0.72 <0.72 <0.72 <0.72 <0.72 <0.72 <0.72 0.72 1
QA/QCMW-103D MW-104 MW-105 LOD SWSLConstituentSample Date MW-101 MW-102S MW-102D MW-102 DR MW-103S
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
toluene 05/18/95 <5 <5 <5 <5 <5 <5
MCL = 1000 07/20/95 <5 <5 <5 <5 <5 <5
FBAC = 1 (SWSL)11/28/95 <5 <5 <5 <5 n <5
NCGQS = 600 (2L Std)02/28/96 <5 <5 <5 <5 <5 <5
2L Std = 1000 (pre- Jan. 2010)08/27/96 <5 <5 <5 <5 <5 <5
2L Std = 600 (Jan. 2010)02/27/97 <5 <5 <5 <5 <5 <5
09/04/97 <5 <5 <5 <5 <5 <5
03/25/98 <5 <5 <5 <5 <5 <5
11/02/98 <5 <5 <5 <5 <5 n
04/27/99 <5 <5 <5 <5 <5 <5
11/22/99 <5 <5 <5 <5 <5 <5
05/24/00 <5 <5 7 R <5 <5 <5
11/30/00 <5 <5 <5 <5 <5 <5
05/30/01 <5 <5 <5 <5 <5 <5
11/14/01 <5 <5 <5 <5 <5 <5
06/06/02 <5 <5 <5 <5 <5 <5
03/13/03 <5 <5 <5 <5 <5 <5
06/19/03 <5 <5 <5 <5 <5 <5
12/09/03 <5 <5 <5 <5
06/23/04 <5 <5 <5 <5
12/01/04 <5 <5 <5 <5
06/01/05 <5 <5 <5 <5 <5
11/03/05 <5 <5 <5 <5 <5
05/24/06 <5 <5 <5 <5 <5
11/15/06 <5 <5 <5 <5 <5
06/14/07 <0.3 <0.3 <0.3 <0.3 <0.3 0.3 1 ic, cc
12/11/07 <0.3 <0.3 <0.3 <0.3 <0.3 0.3 1
06/09/08 <0.3 <0.3 <0.3 <0.3 <0.3 0.3 1
11/06/08 <0.3 <0.3 <0.3 <0.3 <0.3 0.3 1
05/20/09 <0.27 <0.27 <0.27 <0.27 <0.27 0.27 1
10/20/09 <0.27 <0.27 <0.27 <0.27 <0.27 0.27 1
06/23/10 <0.053 <0.053 <0.053 <0.053 <0.053 0.053 1
11/17/10 <0.27 <0.27 <0.27 <0.27 <0.27 0.27 1
05/25/11 <0.85 <0.85 <0.85 <0.85 <0.85 <0.85 0.85 1
11/16/11 <0.85 <0.85 <0.85 <0.85 <0.85 <0.85 0.85 1
06/07/12 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 1
11/14/12 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 1
05/14/13 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 1
11/13/13 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 1
05/14/14 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 1
11/12/14 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 1
05/13/15 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 1
11/10/15 <0.72 <0.72 <0.72 <0.72 <0.72 0.72 1
MW-110D MW-111 LOD SWSL QA/QCConstituentSample Date MW-106 MW-107 MW-108 MW110S
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW-112
trichloroethene 05/18/95
MCL = 5 07/20/95
FBAC = 1 (SWSL)11/28/95
NCGQS = 3 (2L Std)02/28/96
2L Std = 2.8 (pre- Jan. 2010)08/27/96
2L Std = 3 (Jan. 2010)02/27/97
09/04/97
03/25/98
11/02/98
04/27/99
11/22/99
05/24/00
11/30/00
05/30/01
11/14/01
06/06/02
03/13/03
06/19/03
12/09/03
06/23/04
12/01/04
06/06/05
11/03/05
05/24/06
11/15/06
06/14/07 <0.1 <0.1 <0.1 <0.1 <0.1 0.5 J 1.2 J 0.1 1 ic, cc
12/11/07 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.6 J 0.1 1
06/09/08 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 1.5 J 0.1 1 ic, cc
11/06/08 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.8 J 0.1 1
11/12/08 0.78 J 0.38 1
05/20/09 <0.38 <0.38 <0.38 <0.38 <0.38 <0.38 1.3 0.38 1
10/20/09 <0.38 <0.38 <0.38 <0.38 <0.38 <0.38 <0.38 0.38 1
06/23/10 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 0.80 J 0.13 1
11/17/10 <0.38 <0.38 <0.38 <0.38 <0.38 <0.38 <0.38 0.38 1
05/25/11 <0.72 <0.72 <0.72 <0.72 <0.72 <0.72 1.5 0.72 1
11/16/11 <0.72 <0.72 <0.72 <0.72 <0.72 <0.72 <0.72 0.72 1
06/07/12 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 1.2 0.15 1
11/14/12 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 1
verification event 01/08/13 0.15 1
05/14/13 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 1
11/13/13 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 1
05/14/14 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 1
11/12/14 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 1
05/13/15 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 1
11/10/15 <0.89 <0.89 <0.89 <0.89 <0.89 <0.89 <0.89 0.89 1
MW-105 LOD SWSL QA/QCConstituentSample Date MW-101 MW-102S MW-102D MW-102 DR MW-103D MW-104MW-103S
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
trichloroethene 05/18/95
MCL = 5 07/20/95
FBAC = 1 (SWSL)11/28/95
NCGQS = 3 (2L Std)02/28/96
2L Std = 2.8 (pre- Jan. 2010)08/27/96
2L Std = 3 (Jan. 2010)02/27/97
09/04/97
03/25/98
11/02/98
04/27/99
11/22/99
05/24/00
11/30/00
05/30/01
11/14/01
06/06/02
03/13/03
06/19/03
12/09/03
06/23/04
12/01/04
06/01/05
11/03/05
05/24/06
11/15/06
06/14/07 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1 ic, cc
12/11/07 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
06/09/08 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1 ic, cc
11/06/08 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
11/12/08 0.38 1
05/20/09 <0.38 <0.38 <0.38 <0.38 <0.38 0.38 1
10/20/09 <0.38 <0.38 <0.38 <0.38 0.68 J 0.38 1
06/23/10 <0.13 <0.13 <0.13 <0.13 <0.13 0.13 1
11/17/10 <0.38 <0.38 <0.38 <0.38 <0.38 0.38 1
05/25/11 <0.72 <0.72 <0.72 <0.72 <0.72 0.79 J 0.72 1
11/16/11 <0.72 <0.72 <0.72 <0.72 <0.72 <0.72 0.72 1
06/07/12 <0.15 <0.15 <0.15 <0.15 <0.15 0.55 J 0.15 1
11/14/12 <0.15 0.66 J <0.15 <0.15 <0.15 0.15 1
verification event 01/08/13 <0.15 0.15 1
05/14/13 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 1
11/13/13 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 1
05/14/14 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 1
11/12/14 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 1
05/13/15 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 1
11/10/15 <0.89 <0.89 <0.89 <0.89 <0.89 0.89 1
MW-106 MW-107 MW-108 MW-110D MW-111ConstituentSample Date LOD SWSL QA/QCMW110S
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
MW-112
vinyl chloride 05/18/95
MCL = 2 07/20/95
FBAC = 1 (SWSL)11/28/95
NCGQS = 0.03 (2L Std)02/28/96
2L Std = 0.015 (pre- Jan. 2010)08/27/96
2L Std = 0.03 (Jan. 2010)02/27/97
09/04/97
03/25/98
11/02/98
04/27/99
11/22/99
05/24/00
11/30/00
05/30/01
11/14/01
06/06/02
03/13/03
06/19/03
12/09/03
06/23/04
12/01/04
06/06/05
11/03/05
05/24/06
11/15/06
06/14/07 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 1 J 0.1 1 ic, cc
12/11/07 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.5 J 0.1 1
06/09/08 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 1.1 J 0.1 1 ic, cc
11/06/08 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.9 J 0.1 1
11/12/08 0.66 J 0.3 1
05/20/09 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 0.86 J 0.3 1
10/20/09 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 0.86 J 0.3 1
06/23/10 <0.083 <0.083 <0.083 <0.083 <0.083 <0.083 0.61 J 0.083 1
11/17/10 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 0.3 1
05/25/11 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 1.1 0.6 1
verification event 07/06/11 1 0.6 1
11/16/11 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 0.6 1
06/07/12 <0.32 <0.32 <0.32 <0.32 <0.32 <0.32 1.3 0.32 1
verification event 07/19/12 1.1 0.32 1
11/14/12 <0.32 <0.32 <0.32 <0.32 <0.32 <0.32 0.6 J 0.32 1
verification event 01/08/13 0.32 1
05/14/13 <0.32 <0.32 <0.32 <0.32 <0.32 <0.32 <0.32 0.32 1
11/13/13 <0.32 <0.32 <0.32 <0.32 <0.32 <0.32 <0.32 0.32 1
05/14/14 <0.32 <0.32 <0.32 <0.32 <0.32 <0.32 <0.32 0.32 1
11/12/14 <0.32 <0.32 <0.32 <0.32 <0.32 <0.32 <0.32 0.32 1
05/13/15 <0.32 <0.32 <0.32 <0.32 <0.32 <0.32 <0.32 0.32 1
11/10/15 <0.71 <0.71 <0.71 <0.71 <0.71 <0.71 <0.71 0.71 1
MW-103D MW-104 MW-105 LOD SWSLConstituentSample Date MW-101 MW-102S MW-102D MW-102 DR MW-103S QA/QC
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
vinyl chloride 05/18/95
MCL = 2 07/20/95
FBAC = 1 (SWSL)11/28/95
NCGQS = 0.03 (2L Std)02/28/96
2L Std = 0.015 (pre- Jan. 2010)08/27/96
2L Std = 0.03 (Jan. 2010)02/27/97
09/04/97
03/25/98
11/02/98
04/27/99
11/22/99
05/24/00
11/30/00
05/30/01
11/14/01
06/06/02
03/13/03
06/19/03
12/09/03
06/23/04
12/01/04
06/01/05
11/03/05
05/24/06
11/15/06
06/14/07 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1 ic, cc
12/11/07 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
06/09/08 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1 ic, cc
11/06/08 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
11/12/08 0.3 1
05/20/09 <0.3 <0.3 <0.3 <0.3 <0.3 0.3 1
10/20/09 <0.3 <0.3 <0.3 <0.3 <0.3 0.3 1
06/23/10 <0.083 <0.083 <0.083 <0.083 <0.083 0.083 1
11/17/10 <0.3 <0.3 <0.3 <0.3 <0.3 0.3 1
05/25/11 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 0.6 1
verification event 07/06/11 0.6 1
11/16/11 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 0.6 1
06/07/12 <0.32 <0.32 <0.32 <0.32 <0.32 0.59 J 0.32 1
verification event 07/19/12 0.32 1
11/14/12 <0.32 0.88 J <0.32 <0.32 <0.32 0.32 1
verification event 01/08/13 <0.32 0.32 1
05/14/13 <0.32 <0.32 <0.32 <0.32 <0.32 0.32 1
11/13/13 <0.33 0.54 J <0.32 <0.32 <0.32 0.32 1
05/14/14 <0.33 <0.32 <0.32 <0.32 <0.32 0.32 1
11/12/14 <0.33 <0.32 <0.32 <0.32 <0.32 0.32 1
05/13/15 <0.33 <0.32 <0.32 <0.32 <0.32 0.32 1
11/10/15 <0.71 <0.71 <0.71 <0.71 <0.71 0.71 1
MW-110D MW-111 LOD SWSL QA/QCConstituentSample Date MW-106 MW-107 MW-108 MW110S
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW-112
All results in µg/L.
Upgradient wells not shaded.
Shaded cells 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.
R - analyte concentration unreliable S - analyte concentration suspect
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
** - no constituents detected for this date
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
R00592-164
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH 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, 2015 (sampling event 43), Sherrill Environmental personnel obtained
groundwater samples from thirteen groundwater monitoring wells at the Orange County Solid
Waste Management South Facility (south side of Eubanks Road).

During the November, 2015, sampling event, the laboratory detected eleven inorganic
constituents, at concentrations greater than their respective method detection limits (>MDLs):
antimony, arsenic, barium, chromium, cobalt, copper, iron, lead, manganese (C&D parameter)
nickel, silver, vanadium.

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

 Of the eleven inorganic constituents detected, one exceeded its Solid Waste Section Limit
(>SWSL), but was less than its Facility Background Concentration (>SWSL and <Statistical
Prediction Limit, as calculated): arsenic (well 6801-MW105).

Of the eleven inorganic constituents detected, two exceeded their respective Facility
Background Concentrations (= SWSL, except where calculated) and their North Carolina
Groundwater Quality Standards: cobalt (6801-MW105, 6801-MW112), iron (6801-
MW110S).

The reported exceedance of total iron occurred in upgradient well 6801-MW110S.
Conversely, regulated anthropogenic, organic constituents were not observed in well
6801-MW110S. For this reason, and because of its apparent hydrogeologic position, we
find no reason to suspect that upgradient well 6801-MW110S has been impacted by any
solid waste management unit (well 6801-MW110S is associated with the monitoring
programs for both the active C&D landfill and South sanitary landfill).

 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.”

The reported concentration of one inorganic constituent exceeded its Facility Background
Concentration (= SWSL, except where calculated) and its North Carolina Groundwater
Quality Standard in downgradient wells 6801-MW105 and 6801-MW112: total cobalt.

Inorganic Constituents
Page 2

Solid waste regulations indicate that a facility shall initiate:
 an Assessment Monitoring program whenever downgradient concentrations exceed
Facility Background Concentrations
 an Assessment of Corrective Measures whenever downgradient concentrations
exceed Groundwater Quality Concentrations

OCSWM submitted an Alternate Source Demonstration (dated March 7, 2011), showing
that the occurrence of total cobalt groundwater at the subject facility may be attributed to its
natural presence in soil and rock.

In a letter from NCDENR to OCSWM (dated March 30, 2011), NCDENR approved the
Alternate Source Demonstration.

Discussion: cobalt. Solid waste regulations indicate that a facility shall initiate:
 an Assessment Monitoring program whenever downgradient concentrations exceed
Facility Background Concentrations
 an Assessment of Corrective Measures whenever downgradient concentrations
exceed Groundwater Quality Concentrations

During 2005, the concentration of cobalt in well 6801-MW105 began to increase
significantly. Concentrations of cobalt reached a peak during late 2008, which was
followed by a generally decreasing trend. The concentration of cobalt has remained less
than 50 µg/liter since 2012.

OCSWM submitted an Alternate Source Demonstration (dated March 7, 2011), showing
that the occurrence of total cobalt groundwater at the subject facility may be attributed to its
natural presence in soil and rock.

In a letter from NCDENR to OCSWM (dated March 30, 2011), NCDENR approved the
Alternate Source Demonstration.

GRAPHS

0
50
100
150
200
250
300
350
400
450
500
co
n
c
e
n
t
r
a
t
i
o
n

(
p
p
b
)
date sampled
OCSWM -SOUTH -DISTRIBUTION OF TOTAL ARSENIC IN GROUNDWATER
MW-110D MW-104
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
OCSWM -SOUTH -DISTRIBUTION OF TOTAL COBALT IN GROUNDWATER
MW-105
<RL represented by 1/2 RL

TABLES

MW-102
DR
antimony 05/18/95
MCL = 6 07/20/95
FBAC = 6 (SWSL)11/28/95
NCGQS = 1 (GWPS)02/28/96
GWPS = 1.4 (pre-Oct. 2010)08/27/96
GWPS = 1 (Oct. 2010)02/27/97
09/04/97
03/25/98
11/02/98
04/27/99
11/22/99
05/24/00
11/30/00
05/30/01
11/14/01
06/06/02
03/13/03
06/19/03
Fbac revised 04-06-04 12/09/03
06/23/04
12/01/04
06/06/05
11/03/05
05/24/06
11/15/06
06/14/07 4.6 JB <1.2 1.5 JB 1.2 JB <1.2 <1.2 <1.2 1.2 6 i
12/11/07 <1.2 <1.2 <1.2 <1.2 <1.2 1.8 JB 1.3 JB 1.2 6 i
06/09/08 2.6 JB <1.2 <1.2 2.8 JB <1.2 <1.2 1.9 JB 1.2 6 i
11/06/08 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 6
05/20/09 <0.68 <0.68 <0.68 <0.68 <0.68 <0.68 <0.68 0.68 6 i
10/20/09 <0.073 <0.073 <0.073 <0.073 <0.073 <0.073 <0.073 0.073 6
06/23/10 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 0.22 6
11/17/10 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 0.22 6
05/25/11 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 0.22 6
11/16/11 0.826 JB <0.22 <0.22 <0.22 0.589 JB <0.22 <0.22 0.22 6 i
06/07/12 0.37 JB 0.239 JB 0.555 JB <0.22 0.312 JB <0.22 <0.22 0.22 6 i
11/14/12 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 0.22 6 i
05/14/13 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 0.22 6 i
11/13/13 <0.220 <0.220 <0.220 <0.220 <0.220 <0.220 <0.220 0.220 6
05/14/14 <0.220 <0.220 <0.220 <0.220 <0.220 <0.220 <0.220 0.220 6
11/12/14 0.329 J <0.220 <0.220 <0.220 <0.220 <0.220 <0.220 0.220 6
05/13/15 <0.220 0.376 J <0.220 <0.220 <0.220 0.280 J <0.220 0.220 6
06/16/15 verification
11/10/15 0.992 J 0.366 J 0.560 J <0.220 <0.220 <0.220 <0.220 0.220 6
= J (estimated)
Constituent Well / Date MW-101 MW-102S MW-102D MW-103D MW-103S MW-104 MW-105 LOD SWSL QA/QC
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
antimony 05/18/95
MCL = 6 07/20/95
FBAC = 6 (SWSL)11/28/95
NCGQS = 1 (GWPS)02/28/96
GWPS = 1.4 (pre-Oct. 2010)08/27/96
GWPS = 1 (Oct. 2010)02/27/97
09/04/97
03/25/98
11/02/98
04/27/99
11/22/99
05/24/00
11/30/00
05/30/01
11/14/01
06/06/02
03/13/03
06/19/03
Fbac revised 04-06-04 12/09/03
06/23/04
12/01/04
06/06/05
11/03/05
05/24/06
11/15/06
06/14/07 <1.2 <1.2 1.8 JB <1.2 <1.2 1.2 6 i
12/11/07 1.8 JB 1.3 JB 1.8 JB <1.2 <1.2 1.2 6 i
06/09/08 2.3 JB 2.5 JB 2.2 JB 1.6 JB <1.2 1.2 6 i
11/06/08 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 6
05/20/09 <0.68 <0.68 <0.68 <0.68 <0.68 0.68 6 i
10/20/09 0.233 J <0.073 <0.073 <0.073 <0.073 0.073 6
06/23/10 <0.22 <0.22 <0.22 <0.22 <0.22 0.22 6
11/17/10 <0.22 <0.22 <0.22 <0.22 <0.22 0.22 6
05/25/11 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 0.22 6
11/16/11 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 0.22 6 i
06/07/12 <0.22 <0.22 0.797 JB 1.18 JB <0.22 <0.22 0.22 6 i
11/14/12 <0.22 <0.22 0.34 J <0.22 <0.22 0.22 6 i
05/14/13 <0.22 <0.22 0.277 J <0.22 <0.22 0.22 6 i
11/13/13 <0.220 <0.220 <0.220 <0.220 <0.220 0.220 6
05/14/14 <0.220 <0.220 <0.220 <0.220 <0.220 0.220 6
11/12/14 <0.220 <0.220 0.609 J <0.220 <0.220 0.220 6
05/13/15 <0.220 <0.220 0.765 J <0.220 <0.220 0.220 6
06/16/15
11/10/15 <0.220 <0.220 <0.220 <0.220 <0.220 0.220 6
= J (estimated)
LOD SWSL QA/QCMW-107 MW-108 MW-110D MW110S MW-111 MW-112MW-106ConstituentWell / Date
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
MW-102
DRConstituentWell / Date MW-101 MW-102S MW-102D MW-103D MW-103S MW-104 MW-105 LOD SWSL QA/QC
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
arsenic 05/18/95 <10 <10 <10 <10 <10 <10 <10 ms
MCL = 10 07/20/95 <10 <10 <10 <10 <10 <10 <10 i,ms
FBAC = 447 (SPL)11/28/95 <10 <10 <10 <10 35 <10 <10
NCGQS = 10 (2L Std)02/28/96 <10 <10 <10 <10 <10 18 <10
2L Std = 50 (pre- Jan. 2010)08/27/96 <10 <10 <10 <10 <10 <10 <10
2L Std = 10 (Jan. 2010)02/27/97 <10 <10 <10 <10 <10 11 <10
09/04/97 <10 <10 <10 <10 <10 19 B <10 i,t
03/25/98 <10 <10 <10 <10 <10 <10 <10
11/02/98 <10 <10 <10 <10 <10 20.4 <10 i,d
04/27/99 <10 <10 <10 <10 <10 26 <10 ms
11/22/99 <10 <10 <10 <10 <10 <10 <10
05/24/00 <10 <10 <10 <10 <10 23 <10 q
11/30/00 <10 <10 <10 <10 <10 <10 <10
05/30/01 <10 <10 <10 <10 <10 188 <10 i, f, t
11/14/01 <10 <10 <10 <10 <10 168 <10 d
06/06/02 <10 <10 <10 <10 <10 181 <10 msd
03/13/03 <10 <10 <10 <10 <10 270 <10
06/19/03 <10 <10 <10 <10 <10 42 <10
Fbac revised 04-06-04 12/09/03 <10 <10 <10 <10 <10 169 <10 d
06/23/04 <10 <10 <10 <10 <10 12 <10
12/01/04 <10 <10 <10 <10 <10 26 <10
06/06/05 <10 <10 <10 <10 <10 86 <10
11/03/05 <10 <10 <10 <10 <10 64 <10
05/24/06 <10 <10 <10 <10 <10 49 <10
Fbac revised 02-28-07 11/15/06 <10 <10 <10 <10 <10 10 <10
06/14/07 <5.5 <5.5 <5.5 <5.5 <5.5 225 8.5 J 5.5 10
12/11/07 <5.5 <5.5 <5.5 <5.5 <5.5 186 8.3 J 5.5 10
06/09/08 <5.5 <5.5 <5.5 <5.5 <5.5 8.8 JB 18.7 B 5.5 10 t, i
11/06/08 <5.5 <5.5 <5.5 <5.5 <5.5 8.4 JB 16.3 B 5.5 10 f
05/20/09 <2.8 <2.8 <2.8 <2.8 4.6 J 5.5 J 53.4 2.8 10
10/20/09 <2.8 <2.8 <2.8 <2.8 5.13 J 5.66 J 39.1 2.8 10
06/23/10 <2.8 <2.8 <2.8 <2.8 6.51 J 8.85 J 54.1 2.8 10
11/17/10 <2.8 <2.8 <2.8 <2.8 <2.8 5.69 J 47.5 2.8 10
05/25/11 <2.8 <2.8 <2.8 <2.8 <2.8 <2.8 107 2.8 10
11/16/11 <2.8 4.37 JB <2.8 <2.8 2.81 JB 5.86 JB 72.2 2.8 10 i
06/07/12 <2.8 <2.8 <2.8 <2.8 <2.8 <2.8 111 2.8 10
11/14/12 3.28 J <2.8 <2.8 <2.8 <2.8 8.67 J 97.6 2.8 10 i
05/14/13 <5.4 <5.4 <5.4 <5.4 <5.4 <5.4 118 5.4 10 i
11/13/13 <5.40 <5.40 <5.40 <5.40 <5.40 <5.40 115 5.40 10
05/14/14 <5.40 <5.40 <5.40 <5.40 <5.40 5.69 J 85.1 5.40 10
11/12/14 <5.40 <5.40 <5.40 <5.40 <5.40 <5.40 92.7 5.40 10
05/13/15 <6.80 <6.80 <6.80 <13.6 <6.80 7.42 J 86.9 6.80/13.6 10
06/16/15 verification
11/10/15 <6.80 <6.80 <6.80 <6.80 <6.80 <6.80 81.7 6.80 10
= J (estimated)
LOD SWSL QA/QCMW-107 MW-108 MW-110D MW110S MW-111 MW-112MW-106ConstituentWell / Date
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
arsenic 05/18/95 13 J <10 <10 25 <10 <10 ms
MCL = 10 07/20/95 <10/11 B <10 <10 27 <10 <10 i,ms
FBAC = 447 (SPL)11/28/95 45 <10 14 176 <10 <10
NCGQS = 10 (2L Std)02/28/96 <10 <10 <10 14 <10 <10
2L Std = 50 (pre- Jan. 2010)08/27/96 14 <10 <10 20 <10 <10
2L Std = 10 (Jan. 2010)02/27/97 <10 <10 <10 <10 <10 <10
09/04/97 22 B <10 <10 12 B <10 <10 i,t
03/25/98 18 <10 <10 11 <10 <10
11/02/98 30 J <10 <10 <10 <10 i,d
04/27/99 <10 <10 <10 <10 <10 <10 ms
11/22/99 <10 <10 <10 <10 <10 <10
05/24/00 <10 <10 <10 10 <10 <10 q
11/30/00 <10 <10 <10 <10 <10 <10
05/30/01 <10 <10 <10 324 <10 <10 i, f, t
11/14/01 <10 <10 <10 447 <10 <10 d
06/06/02 <10 <10 <10 342 <10 <10 msd
03/13/03 <10 <10 <10 <10
06/19/03 <10 12 312 <10 <10
Fbac revised 04-06-04 12/09/03 <10 <10 149 <10 <10 d
06/23/04 <10 11 <10 <10 <10
12/01/04 <10 <10 <10 <10 <10
06/06/05 <10 <10 157 <10 <10
11/03/05 <10 <10 <10 <10 <10
05/24/06 <10 12 120 <10 <10
Fbac revised 02-28-07 11/15/06 <10 <10 137 <10 <10
06/14/07 <5.5 <5.5 260 <5.5 <5.5 5.5 10
12/11/07 <5.5 <5.5 48.7 <5.5 <5.5 5.5 10
06/09/08 <5.5 <5.5 42 B <5.5 <5.5 5.5 10 t, i
11/06/08 <5.5 <5.5 87.9 B <5.5 <5.5 5.5 10 f
05/20/09 2.8 J <2.8 11.9 <2.8 <2.8 2.8 10
10/20/09 4.06 J 4.12 J 3.18 J 3.69 J 16.5 2.8 10
06/23/10 6.13 J 4.39 J 13.1 <2.8 <2.8 2.8 10
11/17/10 <2.8 4.08 J 15.9 <2.8 <2.8 2.8 10
05/25/11 <2.8 3.39 J 31.6 <2.8 <2.8 10.5 2.8 10
11/16/11 3.29 JB 6.01 JB <2.8 13.4B <2.8 10.7B 2.8 10 i
06/07/12 <2.8 3.05 J 15.2 <2.8 3.93 J 14.9 2.8 10
11/14/12 5.07 J 5.43 J 16 B 3.42 JB 3.29 J 15.8 2.8 10 i
05/14/13 <5.4 <5.4 8.92 J <5.4 <5.4 14.6 5.4 10 i
11/13/13 <5.40 <5.40 13.6 <5.40 <5.40 <5.40 5.40 10
05/14/14 <5.40 <5.40 12.6 <5.40 <5.40 <5.40 5.40 10
11/12/14 <5.40 <5.40 <5.40 <5.40 <5.40 <5.40 5.40 10
05/13/15 <6.80 195 11.5 <6.80 <6.80 <6.80 6.80/13.6 10
06/16/15
11/10/15 <6.80 <6.80 7.92 J <6.80 <6.80 <6.80 6.80 10
= J (estimated)
MW-102
DRConstituentWell / Date MW-101 MW-102S MW-102D MW-103D MW-103S MW-104 MW-105 LOD SWSL QA/QC
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
barium 05/18/95 <500 <500 <500 <500 <500 <500 <500
MCL = 2000 07/20/95 <500 <500 <500 <500 <500 <500 <500
FBAC = 500 (SPL)11/28/95 <500 <500 <500 <500 <500 <500 <500
NCGQS = 700 (2L Std)02/28/96 <500 <500 <500 <500 <500 <500 <500 i,t,f
2L Std = 2000 (pre- Jan. 2010)08/27/96 <500 <500 <500 <500 <500 <500 <500
2L Std = 700 (Jan. 2010)02/27/97 <500 <500 <500 <500 <500 <500 <500 i,t
09/04/97 <500 <500 <500 <500 <500 <500 <500 i,f
03/25/98 <500 <500 <500 <500 <500 <500 <500
11/02/98 <500 <500 <500 <500 <500 <500 <500 ics
04/27/99 <500 <500 <500 <500 <500 <500 <500
11/22/99 <500 <500 <500 <500 <500 <500 <500
05/24/00 <500 <500 <500 <500 <500 <500 <500
11/30/00 <500 <500 <500 <500 <500 <500 <500
05/30/01 <500 <500 <500 <500 <500 <500 <500 i, f, t
11/14/01 <500 <500 <500 <500 <500 <500 <500
06/06/02 <500 <500 <500 <500 <500 <500 <500
03/13/03 <500 <500 <500 <500 <500 <500 <500
06/19/03 <500 <500 <500 <500 <500 <500 <500
12/09/03 <500 <500 <500 <500 <500 <500 <500
06/23/04 <500 <500 <500 <500 <500 <500 <500
12/01/04 <500 <500 <500 <500 <500 <500 <500
06/06/05 <500 <500 <500 <500 <500 <500 <500
11/03/05 <500 <500 <500 <500 <500 <500 <500
05/24/06 <500 <500 <500 <500 <500 <500 <500
11/15/06 <500 <500 <500 <500 <500 <500 <500 f
06/14/07 16.1 JB 67.7 J 11.9 JB 22 JB 19.6 JB 19.6 JB 10.7 JB 1.1 100 t, f
12/11/07 9.2 J 29.4 J 3.2 JB 5.1 JB 2.9 JB 19.5 J 4.8 JB 1.1 100 i
06/09/08 16.1 JB 30.0 JB 5.5 JB 4.1 JB 3.6 JB 2.9 JB 7.0 JB 1.1 100 t, f
11/06/08 18.7 JB 30.9 JB 4.1 JB 2.8 JB 3.3 JB 2.9 JB 5.7 JB 1.1 100 t, f, i
05/20/09 43.9 J 37.8 J 5.48 J <4.2 6.81 J <4.2 6.83 J 4.2 100
10/20/09 49.9 J 33.4 J 3.6 J 2.53 J 3.37 J <1 6.99 J 1 100
06/23/10 15.6 J 31.3 J 2.22 J 3.07 J 7.35 J <1 5.14 J 1 100
11/17/10 11.8 J 29.0 J 1.57 J 3.27 J 3.04 J 1.27 J 6.51 J 1 100
05/25/11 20.4 J 33.1 J 1.88 J 3.19 J 2.79 J <1 8.69 J 1 100
11/16/11 16.7 J 30.3 J 1.85 J 3.03 J 1.81 J <1 7.7 J 1 100
06/07/12 17.9 J 35.4 J <1 2.56 J 1.29 J <1 9.31 J 1 100
11/14/12 44.3 J 32.6 J 1.58 J 3.19 J 1.71 J <1 9.61 J 1 100
05/14/13 14.9 J 33.4 J <1 2.87 J 6.8 J <1 7.46 J 1 100 i
11/13/13 15.8 J 38.3 J 1.98 J 3.73 J 1.77 J <1.00 7.99 J 1.00 100
05/14/14 17.5 J 36.5 J 2.08 J 4.04 J 2.59 J 1.22 J 7.16 J 1.00 100
11/12/14 45.6 J 38.7 J 2.01 J 3.54 J 3.10 J 1.11 J 8.59 J 1.00 100
05/13/15 17.1 J 33.3 J 1.08 J 6.06 J 1.56 J 1.07 J 6.81 J 1.00 100
06/16/15 verification
11/10/15 14.5 J 29.5 J 1.07 J 3.14 J 1.42 J <1.00 6.53 J 1.00 100
LOD SWSL QA/QCMW-107 MW-108 MW-110D MW110S MW-111 MW-112MW-106ConstituentWell / Date
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
barium 05/18/95 <500 <500 <500 <500 <500 <500
MCL = 2000 07/20/95 <500 <500 <500 <500 <500 <500
FBAC = 500 (SPL)11/28/95 <500 <500 <500 512 <500 <500
NCGQS = 700 (2L Std)02/28/96 <500 <500 <500 <500 <500 <500 i,t,f
2L Std = 2000 (pre- Jan. 2010)08/27/96 <500 <500 <500 <500 <500 <500
2L Std = 700 (Jan. 2010)02/27/97 <500 <500 <500 <500 <500 <500 i,t
09/04/97 <500 <500 <500 <500 <500 <500 i,f
03/25/98 <500 <500 <500 <500 <500 <500
11/02/98 <500 <500 <500 <500 <500 ics
04/27/99 <500 <500 <500 <500 <500 <500
11/22/99 <500 <500 <500 <500 <500 <500
05/24/00 <500 <500 <500 <500 <500 <500
11/30/00 <500 <500 <500 <500 <500 <500
05/30/01 <500 <500 <500 <500 <500 <500 i, f, t
11/14/01 <500 <500 <500 <500 <500 <500
06/06/02 <500 <500 <500 <500 <500 <500
03/13/03 <500 <500 <500 <500
06/19/03 <500 <500 <500 <500
12/09/03 <500 <500 <500 <500
06/24/04 <500 <500 <500 <500
12/01/04 <500 <500 <500 <500
06/06/05 <500 <500 <500 <500 <500
11/03/05 <500 <500 <500 <500 <500
05/24/06 <500 <500 <500 <500 <500
11/15/06 <500 <500 <500 <500 <500 f
06/14/07 21.5 JB 6.1 JB 53.8 J 6.1 JB 4.9 JB 1.1 100 t, f
12/11/07 13.4 J 6.3 JB 14.5 J 25.1 J 2.4 JB 1.1 100 i
06/09/08 16.6 JB 23.5 JB 11.4 JB 4.8 JB 8.5 JB 1.1 100 t, f
11/06/08 11 JB 6.5 JB 22.3 JB 5.5 JB 3.0 JB 1.1 100 t, f, i
05/20/09 19.1 J 12.1 J 5.19 J <4.2 <4.2 4.2 100
10/20/09 17.6 J 8.33 J 6.96 J 2.74 J 16.2 J 1 100
06/23/10 14.5 J 11.5 J 4.01 J 5.93 J 2.27 J 1 100
11/17/10 13.4 J 7.76 J 4.79 J 3.99 J 1.85 J 1 100
05/25/11 13.8 J 9.46 J 9.97 J 3.88 J 3.45 J 16.4 J 1 100
11/16/11 14.3 J 8.13 J 3.91 J 4.59 J 5.35 J 16.1 J 1 100
06/07/12 13.1 J 9.05 J 4.51 J 3.29 J 2.65 J 17.4 J 1 100
11/14/12 11.4 J 7.18 J 3.96 J 2.27 J 16.1 J 1 100
05/14/13 11.8 J 6.91 J 4.16 J 2.35 J 19.1 J 1 100 i
11/13/13 9.26 J 6.35 J 4.45 J 2.12 J 16.4 J 1.00 100
05/14/14 9.51 J 7.17 J 4.30 J 8.62 J 16.0 J 1.00 100
11/12/14 11.5 J 6.40 J 4.58 J 3.41 J 16.0 J 1.00 100
05/13/15 3.85 J 216 4.95 J 4.54 J 13.7 J 1.00 100
06/16/15
11/10/15 10.2 J 6.39 J 3.55 J 3.39J 12.0 J 1.00 100
MW-102
DR
Constituent Well / Date MW-101 MW-102S MW-102D MW-103D MW-103S MW-104 MW-105 LOD SWSL QA/QC
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
beryllium 05/18/95 12 <2 <2 <2 <2 <2 <2
MCL = 4 07/20/95 <2 <2 <2 <2 <2 <2 <2
FBAC = 2.6 (SPL)11/28/95 3 <2 <2 <2 29 <2 <2
NCGQS = 4 (GWPS)02/28/96 <2 <2 <2 <2 32 J <2 <2 sd
08/27/96 <2 <2 <2 <2 2 <2 2
02/27/97 <2 <2 <2 <2 <2 <2 <2
09/04/97 <2 <2 <2 <2 <2 <2 <2
03/25/98 <2 <2 <2 <2 6 B <2 <2 i
11/02/98 <2 <2 <2 <2 <2 <2 <2 i
04/27/99 <2 <2 <2 <2 <2 <2 <2 i,f
11/22/99 <2 <2 <2 <2 <2 <2 <2
05/24/00 <2 <2 <2 <2 <2 <2 <2
11/30/00 <2 <2 <2 <2 <2 <2 <2
05/30/01 <2 <2 <2 <2 <2 <2 <2 i, f, t
11/14/01 <2 <2 <2 <2 <2 <2 <2
06/06/02 <2 <2 <2 <2 <2 <2 <2
03/13/03 <2 <2 <2 <2 <2 <2 <2
06/19/03 <2 <2 <2 <2 <2 <2 <2
12/09/03 <2 <2 <2 <2 <2 <2 <2
06/23/04 <2 <2 <2 <2 <2 <2 <2
12/01/04 <2 <2 <2 <2 <2 <2 <2
06/06/05 <2 <2 <2 <2 <2 <2 <2
11/03/05 <2 <2 <2 <2 <2 <2 <2
05/24/06 <2 <2 <2 <2 <2 <2 <2
11/15/06 <2 <2 <2 <2 <2 <2 <2
06/14/07 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 0.2 1
12/11/07 <0.2 <0.2 <0.2 <0.2 <0.2 0.3 JB <0.2 0.2 1 i
06/09/08 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 0.2 1
11/06/08 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 0.2 1
05/20/09 0.15 J <0.08 <0.08 <0.08 0.13 J <0.08 <0.08 0.08 1
10/20/09 0.13 J <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
06/23/10 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
11/17/10 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
05/25/11 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
11/16/11 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
06/07/12 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
11/14/12 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
05/14/13 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
11/13/13 <0.100 <0.100 <0.100 <0.100 <0.100 <0.100 <0.100 0.100 1
05/14/14 <0.100 <0.100 <0.100 <0.100 <0.100 <0.100 <0.100 0.100 1
11/12/14 <0.100 <0.100 <0.100 <0.100 <0.100 <0.100 <0.100 0.100 1
05/13/15 <0.100 <0.100 <0.100 <0.200 <0.100 <0.100 <0.100 0.100/0.200 1
06/16/15 verification
11/10/15 <0.100 <0.100 <0.100 <0.100 <0.100 <0.100 <0.100 0.100 1
LOD SWSL QA/QCMW-107 MW-108 MW-110D MW110S MW-111 MW-112MW-106ConstituentWell / Date
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
beryllium 05/18/95 2 <2 2 2 2 6
MCL = 4 07/20/95 <2/<2 <2 <2 3 <2 <2
FBAC = 2.6 (SPL)11/28/95 5 <2 5 37 <2 <2
NCGQS = 4 (GWPS)02/28/96 3.3 <2 <2 2.6 <2 <2 sd
08/27/96 5 2 <2 2 <2 <2
02/27/97 <2 <2 <2 <2 <2 <2
09/04/97 <2 <2 <2 <2 <2 <2
03/25/98 <2 <2 <2 <2 <2 <2 i
11/02/98 <2 <2 <2 <2 <2 i
04/27/99 <2 <2 <2 <2 <2 <2 i,f
11/22/99 <2 <2 <2 <2 <2 <2
05/24/00 <2 <2 <2 <2 <2 <2
11/30/00 <2 <2 <2 <2 <2 <2
05/30/01 <2 <2 <2 <2 <2 <2
11/14/01 <2 <2 <2 <2 <2 <2
06/06/02 <2 <2 <2 <2 <2 <2
03/13/03 <2 <2 <2 <2
06/19/03 <2 <2 <2 <2
12/09/03 <2 <2 <2 <2
06/23/04 <2 <2 <2 <2
12/01/04 <2 <2 <2 <2
06/06/05 <2 <2 <2 <2 <2
11/03/05 <2 <2 <2 <2 <2
05/24/06 <2 <2 <2 <2 <2
11/15/06 <2 <2 <2 <2 <2
06/14/07 <0.2 <0.2 0.4 J <0.2 <0.2 0.2 1
12/11/07 <0.2 <0.2 <0.2 <0.2 0.2 JB 0.2 1 i
06/09/08 0.2 J 0.3 J 0.6 J <0.2 <0.2 0.2 1
11/06/08 <0.2 <0.2 <0.2 <0.2 <0.2 0.2 1
05/20/09 0.11 J <0.08 0.12 J <0.08 <0.08 0.08 1
10/20/09 <0.1 <0.1 0.58 J <0.1 0.485 J 0.1 1
06/23/10 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
11/17/10 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
05/25/11 <0.1 <0.1 0.106 J <0.1 <0.1 <0.1 0.1 1
11/16/11 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
06/07/12 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
11/14/12 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
05/14/13 <0.1 <0.1 <0.1 <0.1 <0.1 0.1 1
11/13/13 <0.100 <0.100 <0.100 <0.100 <0.100 0.100 1
05/14/14 <0.100 <0.100 <0.100 <0.100 <0.100 0.100 1
11/12/14 <0.100 <0.100 <0.100 <0.100 <0.100 0.100 1
05/13/15 <0.100 20.5 R <0.100 <0.100 <0.100 0.100/0.200 1
06/16/15 <0.100 0.100 1 verification
11/10/15 <0.100 <0.100 <0.100 <0.100 <0.100 0.100 1
MW-102
DRConstituentWell / Date MW-101 MW-102S MW-102D MW-103D MW-103S MW-104 MW-105 LOD SWSL QA/QC
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
cadmium 05/18/95 <1 <1 <1 <1 <1 <1 <1 i,t,d,ms
MCL = 5 07/20/95 <1 1.2 B <1 <1 <1 1.2 B <1 i
FBAC = 1 (SWSL)11/28/95 <1 1.1 B <1 <1 1.5 B <1 <1 i,ms
NCGQS = 2 (2L Std)02/28/96 <1 <1 <1 <1 <1 <1 <1
2L Std = 1.75 (pre- Jan. 2010)08/27/96 <1 1.1 B <1 <1 <1 <1 <1 f,ms
2L Std = 2 (Jan. 2010)02/27/97 <1 1.6 B <1 <1 1.5 B <1 <1 t
09/04/97 <1 1.3 <1 <1 <1 <1 <1 i
03/25/98 <1 <1 <1 <1 <1 <1 <1 i
11/02/98 <1 <1 <1 1.3 B <1 <1 <1 d,t,f
04/27/99 <1 1.6 J <1 <1 <1 <1 <1 cc,i
11/22/99 <1 <1 <1 <1 <1 <1 <1
05/24/00 <1 <1 <1 2 B <1 <1 1 B cc,t,f,q
11/30/00 <1 <1 <1 <1 <1 <1 <1 i, f, t
05/30/01 <1 <1 <1 <1 <1 4 3 i, f, t
11/14/01 <1 <1 <1 <1 <1 <1 <1 f
06/06/02 <1 <1 <1 <1 <1 <1 <1 f
03/13/03 <1 <1 <1 <1 <1 <1 <1
06/19/03 <1 2 <1 <1 1 <1 <1
12/09/03 2 B <1 <1 <1 <1 <1 <1 t
06/23/04 <1 <1 <1 <1 <1 <1 <1
12/01/04 <1 <1 <1 <1 <1 <1 <1
06/06/05 <1 <1 <1 <1 <1 <1 <1
11/03/05 <1 <1 <1 <1 <1 <1 <1
05/24/06 <1 <1 <1 <1 <1 <1 <1
11/15/06 <1 <1 <1 <1 <1 <1 <1
06/14/07 <0.2 <0.2 <0.2 <0.2 <0.2 4 0.2 J 0.2 1
12/11/07 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 0.2 1 i
06/09/08 0.3 JB 0.3 JB 0.4 JB 0.3 JB 0.3 JB <0.2 0.2 JB 0.2 1 f
11/06/08 <0.2 <0.2 <0.2 <0.2 <0.2 0.2 JB 0.2 JB 0.2 1 f, i
05/20/09 0.29 J 0.18 J 0.16 J 0.11 J <0.09 0.20 J 0.13 J 0.09 1
10/20/09 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 0.36 1
06/23/10 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 0.36 1
11/17/10 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 0.36 1
05/25/11 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 0.36 1
11/16/11 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 0.36 1
06/07/12 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 0.36 1
11/14/12 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 0.36 1
05/14/13 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 0.36 1
11/13/13 <0.360 <0.360 <0.360 <0.360 <0.360 <0.360 <0.360 0.360 1
05/14/14 <0.360 <0.360 <0.360 <0.360 <0.360 <0.360 <0.360 0.360 1
11/12/14 <0.360 <0.360 <0.360 <0.360 <0.360 <0.360 <0.360 0.360 1
05/13/15 <0.360 <0.360 <0.360 <0.720 <0.360 <0.360 <0.360 0.360/0.720 1
06/16/15 verification
11/10/15 <0.360 <0.360 <0.360 <0.360 <0.360 <0.360 <0.360 0.360 1
LOD SWSL QA/QCMW-107 MW-108 MW-110D MW110S MW-111 MW-112MW-106ConstituentWell / Date
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
cadmium 05/18/95 <1 3 B <1 1.7 B <1 3 B i,t,d,ms
MCL = 5 07/20/95 <1/<1 <1 <1 <1 <1 <1 i
FBAC = 1 (SWSL)11/28/95 <1 <1 <1 6.1 J <1 <1 i,ms
NCGQS = 2 (2L Std)02/28/96 <1 <1 <1 <1 <1 <1
2L Std = 1.75 (pre- Jan. 2010)08/27/96 4.5 J <1 1.3 B <1 <1 2.2 B f,ms
2L Std = 2 (Jan. 2010)02/27/97 <1 <1 <1 <1 <1 <1 t
09/04/97 <1 <1 <1 <1 <1 1.7 i
03/25/98 <1 <1 <1 <1 <1 <1 i
11/02/98 <1 <1 <1 <1 <1 d,t,f
04/27/99 <1 <1 <1 <1 <1 <1 cc,i
11/22/99 <1 <1 <1 <1 <1 <1
05/24/00 <1 <1 <1 <1 4 J <1 cc,t,f,q
11/30/00 <1 <1 <1 1.2 B <1 <1 i, f, t
05/30/01 <1 3 <1 2 <1 <1 i, f, t
11/14/01 <1 <1 <1 <1 <1 <1 f
06/06/02 <1 <1 <1 <1 <1 <1 f
03/13/03 <1 <1 <1 <1
06/19/03 <1 <1 <1 <1
12/09/03 <1 <1 <1 <1 t
06/23/04 <1 <1 <1 <1
12/01/04 <1 <1 <1 <1
06/06/05 <1 <1 <1 <1 <1
11/03/05 <1 <1 <1 <1 <1
05/24/06 <1 <1 <1 <1 <1
11/15/06 <1 <1 <1 <1 <1
06/14/07 <0.2 <0.2 3.1 <0.2 <0.2 0.2 1
12/11/07 <0.2 <0.2 <0.2 <0.2 0.3 JB 0.2 1 i
06/09/08 0.6 JB 0.5 JB 0.4 JB 0.4 JB 0.3 JB 0.2 1 f
11/06/08 <0.2 <0.2 <0.2 0.2 JB 0.4 JB 0.2 1 f, i
05/20/09 0.11 J 0.33 J 0.15 J 0.23 J 0.11 J 0.09 1
10/20/09 <0.36 <0.36 0.675 J <0.36 <0.36 0.36 1
06/23/10 <0.36 <0.36 <0.36 <0.36 <0.36 0.36 1
11/17/10 <0.36 <0.36 <0.36 <0.36 <0.36 0.36 1
05/25/11 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 0.36 1
11/16/11 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 0.36 1
06/07/12 <0.36 <0.36 <0.36 <0.36 <0.36 <0.36 0.36 1
11/14/12 <0.36 <0.36 0.43 J <0.36 <0.36 0.36 1
05/14/13 <0.36 <0.36 <0.36 <0.36 <0.36 0.36 1
11/13/13 <0.360 <0.360 <0.360 <0.360 <0.360 0.360 1
05/14/14 <0.360 <0.360 <0.360 <0.360 <0.360 0.360 1
11/12/14 <0.360 <0.360 <0.360 <0.360 <0.360 0.360 1
05/13/15 <0.360 21.0 R <0.360 <0.360 <0.360 0.360/0.720 1
06/16/15 <0.360 0.360 1 verification
11/10/15 <0.360 <0.360 <0.360 <0.360 <0.360 0.360 1
MW-102
DRConstituentWell / Date MW-101 MW-102S MW-102D MW-103D MW-103S MW-104 MW-105 LOD SWSL QA/QC
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
chromium 05/18/95 356 J 28 J 11 B <10 <10 <10 <10 i,t,d,ms
MCL = 100 07/20/95 64 J <10 <10 <10 <10 <10 <10 f,ms
FBAC = 14.5 (SPL)11/28/95 64 <10 <10 <10 167 <10 <10
NCGQS = 10 (2L Std)02/28/96 24 J <10 <10 <10 81 J <10 <10 t,f,ms
2L Std = 50 (pre- Jan. 2010)08/27/96 33 <10 <10 <10 12 B <10 25 f
2L Std = 10 (Jan. 2010)02/27/97 31 <10 <10 <10 22 B <10 <10 i,t,f
09/04/97 16 <10 <10 <10 15 <10 <10 f
03/25/98 24 <10 <10 <10 48 <10 <10 i
11/02/98 <10 <10 <10 <10 <10 <10 <10
04/27/99 <10 <10 <10 <10 40 J <10 <10 cc
11/22/99 <10 <10 <10 <10 <10 <10 <10
05/24/00 <10 <10 <10 <10 <10 <10 <10
11/30/00 <10 <10 <10 <10 <10 <10 <10
05/30/01 <10 <10 <10 <10 <10 <10 <10 i, f, t
11/14/01 <10 <10 <10 <10 <10 <10 <10 i
06/06/02 <10 <10 <10 <10 <10 <10 <10 i
03/13/03 <10 <10 <10 <10 <10 <10 <10
06/19/03 <10 <10 <10 <10 <10 <10 <10
12/09/03 <10 <10 <10 <10 <10 <10 <10
06/23/04 <10 <10 <10 <10 <10 <10 <10
12/01/04 <10 <10 <10 <10 <10 <10 <10
06/06/05 <10 <10 <10 <10 <10 <10 <10
11/03/05 <10 <10 <10 <10 <10 <10 <10
05/24/06 <10 <10 <10 <10 <10 <10 <10
11/15/06 <10 <10 <10 <10 <10 <10 <10
06/14/07 9.6 JB 2.1 JB 2.6 JB <0.7 <0.7 <0.7 3 JB 0.7 10 t, f, cc
12/11/07 1.4 JB 1 JB 1.1 JB <0.7 3.4 JB <0.7 1.5 JB 0.7 10 i
06/09/08 4.8 J 0.9 JB 1.8 JB 0.8 JB 1.4 JB <0.7 1.9 JB 0.7 10 f
11/06/08 12.4 B <0.7 6.8 JB <0.7 <0.7 <0.7 1.5 JB 0.7 10 t, f, i
05/20/09 9.3 J <0.7 2.3 J <0.7 5.6 J <0.7 2.5 J 0.7 10
10/20/09 46.9 <1 <1 <1 1.58 J <1 2.32 J 1 10
06/23/10 1.02 J <1 <1 <1 3.22 J <1 <1 1 10
11/17/10 2.25 J <1 <1 <1 <1 <1 <1 1 10
05/25/11 4.7 J <1 <1 <1 1.43 J <1 4.05 J 1 10
11/16/11 3.69 J <1 <1 <1 <1 <1 2.16 J 1 10
06/07/12 7.45 J <1 <1 <1 <1 <1 4.46 J 1 10
11/14/12 8.23 J <1 <1 <1 <1 <1 1.97 J 1 10
05/14/13 <1.4 <1.4 <1.4 <1.4 5.67 J <1.4 <1.4 1.4 10 i
11/13/13 1.55 J <1.40 <1.40 <1.40 <1.40 <1.40 2.64 J 1.40 10
05/14/14 1.82 J <1.40 <1.40 <1.40 <1.40 <1.40 <1.40 1.40 10
11/12/14 12.5 <1.40 <1.40 <1.40 <1.40 <1.40 <1.40 1.40 10
05/13/15 7.63 JB 3.41 J 2.29 JB 6.38 J 3.47 J 3.16 J 2.99 J 1.40 10
06/16/15 verification
11/10/15 <1.40 1.91 J <1.40 <1.40 <1.40 <1.40 <1.40 1.40 10
LOD SWSL QA/QCMW-107 MW-108 MW-110D MW110S MW-111 MW-112MW-106ConstituentWell / Date
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
chromium 05/18/95 28 J <10 50 J 10 B 16.5 B 187 J i,t,d,ms
MCL = 100 07/20/95 27 J/26 J <10 <10 22 J 12 B 16 B f,ms
FBAC = 14.5 (SPL)11/28/95 41 <10 88 69 <10 24
NCGQS = 10 (2L Std)02/28/96 20 J <10 22 J <10 <10 22 J t,f,ms
2L Std = 50 (pre- Jan. 2010)08/27/96 42 17 20 11 B <10 86 f
2L Std = 10 (Jan. 2010)02/27/97 <10 <10 37 B <10 <10 30 i,t,f
09/04/97 <10 <10 <10 <10 <10 <10 f
03/25/98 <10 <10 17 <10 <10 16 i
11/02/98 <10 <10 <10 <10 <10
04/27/99 <10 <10 <10 <10 <10 <10 cc
11/22/99 <10 <10 45 <10 <10 <10
05/24/00 <10 <10 <10 <10 <10 <10
11/30/00 <10 <10 <10 <10 <10 <10
05/30/01 <10 <10 <10 <10 <10 12 B i, f, t
11/14/01 <10 <10 <10 <10 <10 <10 i
06/06/02 <10 <10 15 <10 <10 <10 i
03/13/03 <10 <10 <10 <10
06/19/03 <10 <10 <10 <10
12/09/03 <10 <10 <10 <10
06/23/04 <10 <10 <10 <10
12/01/04 <10 <10 <10 <10
06/06/05 <10 <10 <10 <10 <10
11/03/05 <10 <10 <10 <10 <10
05/24/06 <10 <10 <10 <10 <10
11/15/06 <10 <10 <10 <10 <10
06/14/07 <0.7 <0.7 <0.7 1.3 JB 5.8 JB 0.7 10 t, f, cc
12/11/07 0.76 JB 0.81 JB <0.7 <0.7 1.1 JB 0.7 10 i
06/09/08 1.3 JB 1.6 JB 2.1 JB 0.9 JB 8.4 J 0.7 10 f
11/06/08 <0.7 <0.7 <0.7 1.9 JB 6.7 JB 0.7 10 t, f, i
05/20/09 3.2 J <0.7 <0.7 <0.7 2.4 J 0.7 10
10/20/09 2.36 J <1 1.69 J 3.5 J 2.78 J 1 10
06/23/10 1.63 J <1 <1 <1 1.46 J 1 10
11/17/10 1.13 J <1 <1 <1 1.65 J 1 10
05/25/11 <1 <1 1.14 J <1 3.69 J 1.61 J 1 10
11/16/11 1.84 J <1 <1 <1 10.1 <1 1 10
06/07/12 <1 <1 <1 <1 4.1 J 1.89 J 1 10
11/14/12 <1 <1 <1 1.46 J 5.05 J 1 10
05/14/13 1.66 J <1.4 <1.4 <1.4 <1.4 1.4 10 i
11/13/13 <1.40 <1.40 <1.40 <1.40 <1.40 1.40 10
05/14/14 <1.40 <1.40 <1.40 10.4 1.46 J 1.40 10
11/12/14 <1.40 <1.40 <1.40 2.35 J <1.40 1.40 10
05/13/15 2.96 J 209 R 4.21 J 5.99 JB 4.29 J 1.40 10
06/16/15 <1.40 1.40 10 verification
11/10/15 <1.40 <1.40 <1.40 2.30 J <1.40 1.40 10
MW-102
DRConstituentWell / Date MW-101 MW-102S MW-102D MW-103D MW-103S MW-104 MW-105 LOD SWSL QA/QC
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
cobalt 05/18/95 107 B <10 <10 <10 <10 <10 <10 i,t,ms
MCL =07/20/95 18 <10 <10 <10 <10 <10 <10
FBAC = 43 (SPL)11/28/95 20 <10 <10 <10 18 <10 <10
NCGQS = 1 (GWPS)02/28/96 <10 <10 <10 <10 82 <10 <10
GWPS = 70 (pre-Oct. 2010)08/27/96 18 <10 <10 <10 30 <10 10 i
GWPS = 1 (Oct. 2010)02/27/97 <10 14 <10 <10 29 <10 <10 i,f
09/04/97 <10 <10 <10 <10 82 <10 <10 i
03/25/98 13 <10 <10 <10 56 <10 <10
11/02/98 <10 <10 <10 <10 <10 <10 <10 i
04/27/99 19 J <10 <10 <10 <10 <10 <10 cc
11/22/99 <10 <10 <10 <10 <10 <10 <10 cc,d,lcs,q
05/24/00 <10 <10 <10 <10 <10 <10 <10 t,f
11/30/00 <10 <10 <10 <10 13 <10 <10 i,f
05/30/01 <10 <10 <10 <10 <10 <10 <10 i, f, t
11/14/01 <10 <10 <10 <10 <10 <10 <10
06/06/02 <10 <10 <10 <10 <10 <10 <10
03/13/03 <10 <10 <10 <10 <10 <10 <10
06/19/03 <10 <10 <10 <10 <10 <10 <10
12/09/03 <10 <10 <10 <10 <10 <10 <10
06/23/04 17 <10 <10 <10 <10 <10 <10
12/01/04 <10 <10 <10 <10 <10 <10 14
06/06/05 14 <10 <10 <10 <10 <10 17
11/03/05 <10 <10 <10 <10 <10 <10 24
05/24/06 <10 <10 <10 <10 <10 <10 19
11/15/06 <10 <10 <10 <10 <10 <10 24 i
06/14/07 26.6 J 3.2 J <0.7 <0.7 2.5 J 1.2 J 47.2 J 0.7 10 cc
12/11/07 6.3 J 2.3 J 0.7 J <0.7 4.1 J 1.5 J 39 0.7 10
06/09/08 25.8 2.0 J 1.6 J 1.2 J 0.8 J <0.7 50.8 0.7 10
11/06/08 16.6 2.7 J 1.5 J 1.4 J 0.9 J <0.7 56.4 0.7 10
05/20/09 4.3 J 2.1 J 0.7 J <0.6 5.1 J <0.6 80.4 0.6 10
10/20/09 11 2.93 J <1.1 <1.1 <1.1 <1.1 58.1 1.1 10
06/23/10 7.86 J 1.82 J <1.1 <1.1 2.68 J <1.1 47.8 1.1 10
11/17/10 3.13 J 2.26 J <1.1 1.43 J <1.1 <1.1 47.6 1.1 10
05/25/11 11.8 1.93 J <1.1 <1.1 <1.1 <1.1 73.7 1.1 10
11/16/11 8.17 J 1.94 J <1.1 <1.1 <1.1 <1.1 48.2 1.1 10
06/07/12 <1.1 2.08 J <1.1 <1.1 <1.1 1.14 J 65.8 1.1 10
11/14/12 9.18 J 2.81 J <1.1 <1.1 <1.1 <1.1 48.5 1.1 10
05/14/13 <1.1 1.5 JB <1.1 <1.1 4.32 JB 1.35 JB 49.3 1.1 10 i
11/13/13 3.06 J 4.43 J <1.10 1.40 J 1.13 J 1.22 J 48.9 1.10 10
05/14/14 6.83 J 2.70 J <1.10 1.57 J 1.44 J <1.10 44.5 1.10 10
11/12/14 9.57 J 4.73 J <1.10 1.10 J <1.10 <1.10 46.6 1.10 10
05/13/15 4.42 J 1.83 J <1.10 <2.20 <1.10 <1.10 43.1 1.10/2.20 10
06/16/15 verification
11/10/15 <1.10 3.27 J <1.10 <1.10 <1.10 <1.10 39.5 1.10 10
LOD SWSL QA/QCMW-107 MW-108 MW-110D MW110S MW-111 MW-112MW-106ConstituentWell / Date
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
cobalt 05/18/95 19 J <10 23 J 16 J 43 J 71 B i,t,ms
MCL =07/20/95 14/14 <10 <10 14 23 <10
FBAC = 43 (SPL)11/28/95 50 <10 50 810 15 19
NCGQS = 1 (GWPS)02/28/96 18 <10 <10 14 17 14
GWPS = 70 (pre-Oct. 2010)08/27/96 32 13 <10 29 10 <10 i
GWPS = 1 (Oct. 2010)02/27/97 <10 <10 15 <10 <10 11 i,f
09/04/97 21 <10 <10 <10 <10 <10 i
03/25/98 30 <10 11 <10 <10 24
11/02/98 34 <10 <10 <10 <10 i
04/27/99 22 J <10 <10 <10 <10 <10 cc
11/22/99 19 J <10 <10 <10 <10 12 J cc,d,lcs,q
05/24/00 26 <10 <10 <10 <10 15 B t,f
11/30/00 <10 <10 <10 <10 <10 <10 i,f
05/30/01 <10 <10 <10 <10 <10 <10 i, f, t
11/14/01 22 <10 <10 <10 <10 <10
06/06/02 <10 <10 <10 <10 <10 <10
03/13/03 <10 <10 <10 <10
06/19/03 <10 <10 <10 <10
12/09/03 18 <10 <10 <10
06/23/04 <10 <10 <10 <10
12/01/04 23 11 <10 <10
06/06/06 <10 <10 <10 <10
11/03/05 12 <10 <10 <10
05/24/06 <10 <10 <10 <10
11/15/06 <10 <10 <10 <10 i
06/14/07 3.4 J 9.1 J 1.7 J <0.7 0.8 J 0.7 10 cc
12/11/07 13.9 16.4 <0.7 0.7 J 0.97 J 0.7 10
06/09/08 5.6 J 17.6 1.7 J <0.7 4.2 J 0.7 10
11/06/08 1.9 J 13.7 1.6 J 2.3 J 2.3 J 0.7 10
05/20/09 3.6 J 21 1.1 J <0.6 2.1 J 0.6 10
10/20/09 4.82 J 19 4.26 J 2.73 J 49.9 1.1 10
06/23/10 1.89 J 14.6 <1.1 <1.1 1.34 J 1.1 10
11/17/10 1.19 J 16.8 <1.1 <1.1 1.66 J 1.1 10
05/25/11 1.36 J 13 <1.1 <1.1 3.91 J 48.8 1.1 10
11/16/11 2.61 J 12.4 1.15 J <1.1 5.72 J 19.7 1.1 10
06/07/12 4.26 J 11.3 <1.1 <1.1 4.37 J 50.3 1.1 10
11/14/12 1.63 J 14 <1.1 2.08 J 44.1 1.1 10
05/14/13 1.74 JB 10.6 <1.1 <1.1 36.5 1.1 10 i
11/13/13 2.93 J 11.2 1.48 J 1.57 J 37.3 1.10 10
05/14/14 2.00 J 7.34 J 1.25 J 12.4 27.6 1.10 10
11/12/14 3.01 J 15.8 1.38 J 3.11 J 31.7 1.10 10
05/13/15 <1.10 208 R 2.15 J 3.05 J 13.6 1.10/2.20 10
06/16/15 6.81 J 1.10 10 verification
11/10/15 <1.10 5.95 J <1.10 3.58 J 13.7 1.10 10
MW-102
DRConstituentWell / Date MW-101 MW-102S MW-102D MW-103D MW-103S MW-104 MW-105 LOD SWSL QA/QC
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
copper 05/18/95 <200 <200 <200 <200 <200 <200 <200
MCL = 1300 07/20/95 <200 <200 <200 <200 <200 <200 <200
FBAC = 10 (SWSL)11/28/95 <200 <200 <200 <200 285 <200 <200
NCGQS = 1000 (2L Std)02/28/96 <200 <200 <200 <200 <200 <200 <200 f,sd
08/27/96 <200 <200 <200 <200 <200 <200 <200 i,t,f
02/27/97 <200 <200 <200 <200 <200 <200 <200
09/04/97 <200 <200 <200 <200 <200 <200 <200 t
03/25/98 <200 <200 <200 <200 <200 <200 <200 i
11/02/98 <200 <200 <200 <200 <200 <200 <200
04/27/99 <200 <200 <200 <200 <200 <200 <200
11/22/99 <200 <200 <200 <200 <200 <200 <200
05/24/00 <200 <200 <200 <200 <200 <200 <200
11/30/00 <200 <200 <200 <200 <200 <200 <200
05/30/01 <200 <200 <200 <200 <200 <200 <200 i, f, t
11/14/01 <200 <200 <200 <200 <200 <200 <200
06/06/02 <200 <200 <200 <200 <200 <200 <200
03/13/03 <200 <200 <200 <200 <200 <200 <200
06/19/03 <200 <200 <200 <200 <200 <200 <200
12/09/03 <200 <200 <200 <200 <200 <200 <200
06/23/04 <200 <200 <200 <200 <200 <200 <200
12/01/04 <200 <200 <200 <200 <200 <200 <200
06/06/05 200 <200 <200 <200 <200 <200 <200
11/03/05 <200 <200 <200 <200 <200 <200 <200
05/24/06 <200 <200 <200 <200 <200 <200 <200
11/15/06 <200 <200 <200 <200 <200 <200 <200
06/14/07 3.3 J 3.1 J 2.9 J 3.5 J 3.9 J 2.1 J 2.7 J 2 10
12/11/07 3.8 JB <2 <2 <2 1.3 JB <2 1.8 JB 2 10 f
06/09/08 3.5 J <2 <2 <2 <2 <2 <2 2 10
11/06/08 8.5 JB <2 <2 <2 <2 <2 <2 2 10 i
05/20/09 3.62 J <0.81 4.63 J <0.81 5.69 J <0.81 <0.81 0.81 10
10/20/09 14.2 <1.6 2.19 J <1.6 <1.6 <1.6 <1.6 1.6 10
06/23/10 4.79 J <1.6 3.07 J <1.6 5.01 J <1.6 <1.6 1.6 10
11/17/10 6.42 J <1.6 <1.6 <1.6 <1.6 <1.6 <1.6 1.6 10 i
05/25/11 4.51 J <1.6 1.78 J <1.6 <1.6 <1.6 <1.6 1.6 10
11/16/11 3.47 J <1.6 <1.6 <1.6 <1.6 <1.6 <1.6 1.6 10
06/07/12 3.07 J <1.6 <1.6 <1.6 <1.6 <1.6 <1.6 1.6 10
11/14/12 8.16 J <1.6 <1.6 <1.6 <1.6 <1.6 <1.6 1.6 10
05/14/13 <1.6 <1.6 <1.6 <1.6 6.46 J <1.6 <1.6 1.6 10
11/13/13 <1.60 <1.60 <1.60 <1.60 <1.60 <1.60 <1.60 1.60 10
05/14/14 2.03 J <1.60 2.08 J <1.60 <1.60 <1.60 <1.60 1.60 10
11/12/14 8.62 J <1.60 <1.60 <1.60 <1.60 <1.60 <1.60 1.60 10
05/13/15 <1.60 <1.60 <1.60 <3.20 <1.60 <1.60 <1.60 1.60/3.20 10
06/16/15 verification
11/10/15 <1.60 <1.60 <1.60 1.60 <1.60 <1.60 <1.60 1.60 10
LOD SWSL QA/QCMW-107 MW-108 MW-110D MW110S MW-111 MW-112MW-106ConstituentWell / Date
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
copper 05/18/95 <200 <200 <200 <200 <200 <200
MCL = 1300 07/20/95 <200 <200 <200 <200 <200 <200
FBAC = 10 (SWSL)11/28/95 <200 <200 <200 483 <200 <200
NCGQS = 1000 (2L Std)02/28/96 <200 <200 <200 <200 <200 <200 f,sd
08/27/96 <200 <200 <200 <200 <200 <200 i,t,f
02/27/97 <200 <200 <200 <200 <200 <200
09/04/97 <200 <200 <200 <200 <200 <200 t
03/25/98 <200 <200 <200 <200 <200 <200 i
11/02/98 <200 <200 <200 <200 <200
04/27/99 <200 <200 <200 <200 <200 <200
11/22/99 <200 <200 <200 <200 <200 <200
05/24/00 <200 <200 <200 <200 <200 <200
11/30/00 <200 <200 <200 <200 <200 <200
05/30/01 <200 <200 <200 <200 <200 <200 i, f, t
11/14/01 <200 <200 <200 <200 <200 <200
06/06/02 <200 <200 <200 <200 <200 <200
03/13/03 <200 <200 <200 <200
06/19/03 <200 <200 <200 <200
12/09/03 <200 <200 <200 <200
06/23/04 <200 <200 <200 <200
12/01/04 <200 <200 <200 <200
06/06/05 <200 <200 <200 <200 <200
11/03/05 <200 <200 <200 <200 <200
05/24/06 <200 <200 <200 <200 <200
11/15/06 <200 <200 <200 <200 <200
06/14/07 2.8 J 3.3 J 2.2 J <2 2.8 J 2 10
12/11/07 3.1 JB <2 <2 2.7 JB 2.9 JB 2 10 f
06/09/08 <2 <2 <2 2.2 J 4.3 J 2 10
11/06/08 <2 <2 <2 <2 5.3 JB 2 10 i
05/20/09 4.39 J <0.81 1.01 J <0.81 1.80 J 0.81 10
10/20/09 <1.6 <1.6 1.99 J 3.83 J <1.6 1.6 10
06/23/10 2.84 J 3.74 J <1.6 <1.6 2.25 J 1.6 10
11/17/10 2.22 J 7.35 J 3.01 J <1.6 3.02 J 1.6 10 i
05/25/11 1.78 J 1.71 J 3.17 J 3.17 J 5.24 J <1.6 1.6 10
11/16/11 <1.6 2.79 J <1.6 <1.6 8.05 J <1.6 1.6 10
06/07/12 2.11 J 2.97 J 1.65 J 1.78 J 5.49 J <1.6 1.6 10
11/14/12 <1.6 <1.6 <1.6 <1.6 <1.6 1.6 10
05/14/13 2.34 J <1.6 <1.6 <1.6 <1.6 1.6 10
11/13/13 <1.60 <1.60 <1.60 2.69 J <1.60 1.60 10
05/14/14 1.90 J <1.60 <1.60 11.6 2.18 J 1.60 10
11/12/14 1.89 J <1.60 4.98 J 3.28 J <1.60 1.60 10
05/13/15 <1.60 198 R <1.60 3.62 J <1.60 1.60/3.20 10
06/16/15 <1.60 1.60 10 verification
11/10/15 <1.60 <1.60 <1.60 2.16 J <1.60 1.60 10
MW-102
DRConstituentWell / Date MW-101 MW-102S MW-102D MW-103D MW-103S MW-104 MW-105 LOD SWSL QA/QC
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
lead 05/18/95 58 B 11 B <10 <10 <10 <10 <10 i,t
MCL = 15 07/20/95 <10 <10 <10 <10 <10 <10 <10 f
FBAC = 22.5 (SPL)11/28/95 <10 <10 <10 <10 63 J <10 <10 i,ms
NCGQS = 15 (2L Std)02/28/96 <10 <10 <10 <10 41 <10 <10 i,t,f
08/27/96 <10 <10 <10 <10 <10 <10 <10 f
02/27/97 <10 <10 <10 <10 11 B <10 <10 t,f,ms
09/04/97 <10 12 B <10 <10 25 B 18 B <10 i,t,f
03/25/98 <10 <10 <10 12 B 30 <10 <10 i,t
11/02/98 <10 <10 <10 13.7 J <10 <10 <10 d
04/27/99 <10 <10 <10 <10 <10 <10 <10 cc
11/22/99 <10 <10 <10 <10 <10 <10 <10
05/24/00 <10 <10 <10 <10 <10 <10 <10
11/30/00 <10 <10 <10 <10 <10 <10 <10
05/30/01 <10 <10 <10 <10 <10 <10 <10 i, f, t
11/14/01 <10 <10 <10 <10 <10 <10 <10
06/06/02 <10 <10 <10 <10 <10 <10 <10 i
03/13/03 <10 <10 <10 <10 <10 <10 <10
06/19/03 <10 <10 <10 <10 <10 <10 <10
12/09/03 <10 <10 <10 <10 <10 <10 <10
06/23/04 <10 <10 <10 16 <10 <10 <10
12/01/04 <10 <10 <10 <10 <10 <10 <10
06/06/05 <10 <10 <10 <10 <10 <10 <10
11/03/05 <10 <10 <10 <10 <10 <10 <10
05/24/06 <10 <10 <10 <10 <10 <10 <10
11/15/06 <10 <10 <10 <10 <10 <10 <10 i, f
06/14/07 <2 <2 <2 <2 <2 <2 <2 2 10
12/11/07 2 J <2 <2 <2 <2 2.9 J <2 2 10
06/09/08 <2 <2 <2 <2 <2 <2 2.1 JB 2 10 i
11/06/08 <2 2.2 JB <2 <2 <2 <2 <2 2 10 i
05/20/09 <1.6 <1.6 <1.6 <1.6 2.4 J <1.6 <1.6 1.6 10
10/20/09 8.74 J <1.9 <1.9 <1.9 2.03 J <1.9 <1.9 1.9 10
06/23/10 <1.9 <1.9 <1.9 <1.9 2.16 J <1.9 <1.9 1.9 10
11/17/10 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 1.9 10
05/25/11 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 1.9 10
11/16/11 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 1.9 10
06/07/12 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 2.28 J 1.9 10
11/14/12 2.77 J <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 1.9 10
05/14/13 <2.1 <2.1 <2.1 <2.1 <2.1 <2.1 <2.1 2.1 10
11/13/13 <2.10 <2.10 <2.10 <2.10 <2.10 <2.10 <2.10 2.10 10
05/14/14 <2.10 <2.10 <2.10 2.22 J <2.10 <2.10 <2.10 2.10 10
11/12/14 <2.10 <2.10 <2.10 <2.10 <2.10 <2.10 <2.10 2.10 10
05/13/15 <3.10 <3.10 <3.10 <6.20 <3.10 <3.10 <3.10 3.10/6.20 10
06/16/15 verification
11/10/15 <3.10 <3.10 <3.10 <3.10 <3.10 3.29 J <3.10 3.10 10
LOD SWSL QA/QCMW-107 MW-108 MW-110D MW110S MW-111 MW-112MW-106ConstituentWell / Date
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
lead 05/18/95 17 B <10 <10 31.1 B 17.3 B 16 B i,t
MCL = 15 07/20/95 <10/<10 <10 <10 37 <10 <10 f
FBAC = 22.5 (SPL)11/28/95 15 B <10 18 J 163 J <10 <10 i,ms
NCGQS = 15 (2L Std)02/28/96 <10 <10 <10 18 B 21 B <10 i,t,f
08/27/96 10 12 <10 13 <10 <10 f
02/27/97 <10 <10 <10 <10 <10 <10 t,f,ms
09/04/97 11 B 16 B 18 B 14 B <10 <10 i,t,f
03/25/98 <10 <10 <10 <10 <10 <10 i,t
11/02/98 <10 <10 <10 <10 <10 d
04/27/99 <10 <10 <10 <10 <10 <10 cc
11/22/99 <10 <10 <10 <10 <10 <10
05/24/00 <10 <10 <10 <10 <10 <10
11/30/00 <10 <10 <10 <10 <10 <10
05/30/01 <10 <10 <10 40 <10 <10 i, f, t
11/14/01 <10 <10 <10 31 <10 <10
06/06/02 <10 <10 <10 27 <10 <10 i
03/13/03 <10 <10 <10 <10
06/19/03 <10 <10 <10 <10
12/09/03 <10 <10 <10 <10
06/23/04 <10 <10 <10 <10
12/01/04 <10 <10 <10 <10
06/06/05 <10 <10 16 <10 <10
11/03/05 <10 <10 <10 <10 <10
05/24/06 <10 10 <10 <10 <10
11/15/06 <10 10 B <10 <10 <10 i, f
06/14/07 <2 <2 22.1 <2 <2 2 10
12/11/07 <2 <2 4.4 J <2 <2 2 10
06/09/08 <2 <2 5.5 JB <2 <2 2 10 i
11/06/08 <2 <2 10 JB <2 3.2 JB 2 10 i
05/20/09 <1.6 <1.6 1.6 J <1.6 <1.6 1.6 10
10/20/09 <1.9 <1.9 2.76 J <1.9 2.24 J 1.9 10
06/23/10 2.25 J <1.9 <1.9 <1.9 <1.9 1.9 10
11/17/10 <1.9 <1.9 3.07 J <1.9 <1.9 1.9 10
05/25/11 <1.9 <1.9 5.61 J <1.9 <1.9 2.05 J 1.9 10
11/16/11 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 1.9 10
06/07/12 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 1.9 10
11/14/12 <1.9 <1.9 <1.9 <1.9 <1.9 1.9 10
05/14/13 <2.1 <2.1 <2.1 <2.1 <2.1 2.1 10
11/13/13 <2.10 <2.10 <2.10 <2.10 <2.10 2.10 10
05/14/14 <2.10 <2.10 <2.10 <2.10 <2.10 2.10 10
11/12/14 <2.10 <2.10 <2.10 <2.10 <2.10 2.10 10
05/13/15 <3.10 208 R <3.10 <3.10 <3.10 3.10/6.20 10
06/16/15 <3.10 3.10 10 verification
11/10/15 <3.10 3.82 J 4.07 J <3.10 <3.10 3.10 10
MW-102
DRConstituentWell / Date MW-101 MW-102S MW-102D MW-103D MW-103S MW-104 MW-105 LOD SWSL QA/QC
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
mercury 05/18/95
MCL = 2 07/20/95
FBAC = 0.2 (SWSL)11/28/95
NCGQS = 1 (2L Std)02/28/96
2L Std = 1.05 (pre- Jan. 2010)08/27/96
2L Std = 1 (Jan. 2010)02/27/97
09/04/97
03/25/98
11/02/98
04/27/99
11/22/99
05/24/00
11/30/00
05/30/01
11/14/01
06/06/02
03/13/03
06/19/03
12/09/03
06/23/04
12/01/04
06/06/05
11/03/05
05/24/06
11/15/06
06/14/07
12/11/07
06/09/08
11/06/08 0.01 0.2 i
05/20/09
10/20/09 0.121 J <0.054 <0.054 <0.054 <0.054 <0.054 <0.054 0.054 0.2
06/23/10
11/17/10 <0.17 0.17 0.2
05/25/11 0.17 0.2
11/16/11 <0.17 0.17 0.2
06/07/12 0.17 0.2
11/14/12 <0.17 0.17 0.2
05/14/13 0.17 0.2
11/13/13 <0.170 0.170 0.2
05/14/14 0.17 0.2
11/12/14 <0.170 0.170 0.2
05/13/15 0.170 0.2
06/16/15 verification
11/10/15 <0.170 0.170 0.2
LOD SWSL QA/QCMW-107 MW-108 MW-110D MW110S MW-111 MW-112MW-106ConstituentWell / Date
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
mercury 05/18/95
MCL = 2 07/20/95
FBAC = 0.2 (SWSL)11/28/95
NCGQS = 1 (2L Std)02/28/96
2L Std = 1.05 (pre- Jan. 2010)08/27/96
2L Std = 1 (Jan. 2010)02/27/97
09/04/97
03/25/98
11/02/98
04/27/99
11/22/99
05/24/00
11/30/00
05/30/01
11/14/01
06/06/02
03/13/03
06/19/03
12/09/03
06/23/04
12/01/04
06/06/05
11/03/05
05/24/06
11/15/06
06/14/07
12/11/07
06/09/08
11/06/08 0.13 JB 0.16 JB 0.01 0.2 i
05/20/09
10/20/09 <0.054 <0.054 <0.054 <0.054 0.054 0.2
06/23/10
11/17/10 0.17 0.2
05/25/11 <0.17 <0.17 0.17 0.2
11/16/11 <0.17 <0.17 0.17 0.2
06/07/12 <0.17 <0.17 0.17 0.2
11/14/12 <0.17 0.17 0.2
05/14/13 <0.17 0.17 0.2
11/13/13 <0.170 0.170 0.2
05/14/14 <0.170 0.170 0.2
11/12/14 <0.170 0.170 0.2
05/13/15 <0.170 0.170 0.2
06/16/15
11/10/15 <0.170 0.170 0.2
MW-102
DRConstituentWell / Date MW-101 MW-102S MW-102D MW-103D MW-103S MW-104 MW-105 LOD SWSL QA/QC
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
nickel 05/18/95 259 <50 <50 <50 <50 <50 <50 i,t
MCL =07/20/95 <50 <50 <50 <50 <50 <50 <50
FBAC = 50 (SWSL)11/28/95 <50 <50 <50 <50 301 <50 <50
NCGQS = 100 (2L Std)02/28/96 <50 <50 <50 <50 105 <50 <50
08/27/96 <50 <50 <50 <50 <50 <50 <50 i,t,f
02/27/97 <50 <50 <50 <50 <50 <50 <50 i,t,f,sd
09/04/97 <50 <50 <50 <50 72 <50 <50 t,f
03/25/98 <50 <50 <50 <50 63 <50 <50 t
11/02/98 <50 <50 <50 <50 <50 <50 <50
04/27/99 <50 <50 <50 <50 <50 <50 <50
11/22/99 <50 <50 <50 <50 <50 <50 <50
05/24/00 <50 <50 <50 <50 <50 <50 <50
11/30/00 <50 <50 <50 <50 <50 <50 <50
05/30/01 <50 <50 <50 <50 <50 <50 <50 i, f, t
11/14/01 <50 <50 <50 <50 <50 <50 <50
06/06/02 <50 <50 <50 <50 <50 <50 <50
03/13/03 <50 <50 <50 <50 <50 <50 <50
06/19/03 <50 <50 <50 <50 <50 <50 <50
12/09/03 <50 <50 <50 <50 <50 <50 <50
06/23/04 <50 <50 <50 <50 <50 <50 <50
12/01/04 <50 <50 <50 <50 <50 <50 <50
06/06/05 <50 <50 <50 <50 <50 <50 <50
11/03/05 <50 <50 <50 <50 <50 <50 <50
05/24/06 <50 <50 <50 <50 <50 <50 <50
11/15/06 <50 <50 <50 <50 <50 <50 <50
06/14/07 3.7 JB 4.1 JB 1.8 JB 2.6 JB 7.1 JB 1.2 JB 12 J 0.6 50 t, f
12/11/07 1.4 JB 2.8 JB <0.6 1.6 JB 2.6 JB 4.1 JB 10.4 J 0.6 50 t, i
06/09/08 1.3 J 1.3 J <0.6 0.8 J <0.6 <0.6 11.0 J 0.6 50
11/06/08 7.3 JB 3.1 JB 3.1 JB 0.7 JB 2.8 JB <0.6 25.6 JB 0.6 50 t, f
05/20/09 5.9 J 4.1 J 1.5 J 2.6 J 8.8 J <0.6 14.0 J 0.6 50
10/20/09 26.3 J 5.17 J <1.8 <1.8 2.69 J <1.8 10.4 J 1.8 50
06/23/10 <1.8 3.40 J <1.8 <1.8 4.75 J <1.8 7.73 J 1.8 50
11/17/10 <1.8 3.48 J <1.8 <1.8 2.16 J <1.8 8.94 J 1.8 50
05/25/11 3.06 J 3.6 J <1.8 2.46 J 3 J <1.8 14.6 J 1.8 50
11/16/11 <1.8 3.89 J <1.8 2.19 J <1.8 <1.8 8.53 J 1.8 50
06/07/12 4.25 J 4.92 J <1.8 1.97 J 1.9 J <1.8 12.4 J 1.8 50
11/14/12 5.03 J 5.03 J <1.8 <1.8 <1.8 <1.8 7.55 J 1.8 50
05/14/13 <1.8 2.82 JB <1.8 2.36 JB 10.1 JB <1.8 8.98 JB 1.8 50 i
11/13/13 <1.80 9.88 J <1.80 <1.80 1.87 J <1.80 9.85 J 1.80 50
05/14/14 <1.80 3.96 J <1.80 <1.80 2.43 J <1.80 8.27 J 1.80 50
11/12/14 8.38 J 5.11 J <1.80 2.04 J <1.80 <1.80 9.65 J 1.80 50
05/13/15 3.51 J 5.52 J <1.80 6.67 J 3.92 J <1.80 11.0 J 1.80/3.60 50
06/16/15 verification
11/10/15 <1.80 4.50 J <1.80 2.26 J 1.81 J <1.80 8.64 J 1.80 50
LOD SWSL QA/QCMW-107 MW-108 MW-110D MW110S MW-111 MW-112MW-106ConstituentWell / Date
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
nickel 05/18/95 <50 <50 <50 <50 <50 125 i,t
MCL =07/20/95 <50/<50 <50 <50 <50 <50 <50
FBAC = 50 (SWSL)11/28/95 <50 <50 84 402 <50 <50
NCGQS = 100 (2L Std)02/28/96 <50 <50 <50 <50 <50 <50
08/27/96 <50 <50 <50 <50 <50 <50 i,t,f
02/27/97 <50 <50 <50 <50 <50 <50 i,t,f,sd
09/04/97 <50 <50 <50 <50 <50 <50 t,f
03/25/98 <50 <50 <50 <50 <50 <50 t
11/02/98 <50 <50 <50 <50 <50
04/27/99 <50 <50 <50 <50 <50 <50
11/22/99 <50 <50 <50 <50 <50 <50
05/24/00 <50 <50 <50 <50 <50 <50
11/30/00 <50 <50 <50 <50 <50 <50
05/30/01 <50 <50 <50 <50 <50 <50 i, f, t
11/14/01 <50 <50 <50 <50 <50 <50
06/06/02 <50 <50 <50 <50 <50 <50
03/13/03 <50 <50 <50 <50
06/19/03 <50 <50 <50 <50
12/09/03 <50 <50 <50 <50
06/23/04 <50 <50 <50 <50
12/01/04 <50 <50 <50 <50
06/06/05 <50 <50 <50 <50 <50
11/03/05 <50 <50 <50 <50 <50
05/24/06 <50 <50 <50 <50 <50
11/15/06 <50 <50 <50 <50 <50
06/14/07 1.6 JB 4.8 JB 4.7 JB 1 JB 3.6 JB 0.6 50 t, f
12/11/07 7 J 6.1 JB 2.4 JB 2.6 JB <0.6 0.6 50 t, i
06/09/08 3.9 J 2.8 J 1.8 J <0.6 1.9 J 0.6 50
11/06/08 4.3 JB 5.6 JB 10.9 JB 1.8 JB 3.8 JB 0.6 50 t, f
05/20/09 4.9 J 4.3 J 2.5 J 1.1 J 2.5 J 0.6 50
10/20/09 3.32 J 4.77 J 2.23 J 3.05 J 8.32 J 1.8 50
06/23/10 4.46 J 3.69 J <1.8 <1.8 <1.8 1.8 50
11/17/10 3.88 J 4.77 J 2.20 J <1.8 2.39 J 1.8 50
05/25/11 4.8 J 5.42 J 2.97 J <1.8 4.56 J 8.11 J 1.8 50
11/16/11 5.75 J 6.04 J <1.8 2.1 J 8.01 J 6.57 J 1.8 50
06/07/12 19.3 J 5.38 J 1.89 J <1.8 4.49 J 9.37 J 1.8 50
11/14/12 5.06 J 6.48 J <1.8 2.27 J 11.2 J 1.8 50
05/14/13 5.16 JB 5.42 JB 1.91 JB 1.96 JB 11.7 JB 1.8 50 i
11/13/13 3.03 J 4.56 J <1.80 <1.80 8.02 J 1.80 50
05/14/14 4.19 J 2.98 J <1.80 9.73 J 6.91 J 1.80 50
11/12/14 5.25 J 4.50 J <1.80 2.72 J 6.97 J 1.80 50
05/13/15 2.01 J 211 R 3.39 J 3.98 J 8.68 J 1.80/3.60 50
06/16/15 3.18 J 1.80 50 verification
11/10/15 3.99 J 4.35 J <1.80 3.62 J 5.88 J 1.80 50
MW-102
DRConstituentWell / Date MW-101 MW-102S MW-102D MW-103D MW-103S MW-104 MW-105 LOD SWSL QA/QC
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
selenium 05/18/95
MCL = 50 07/20/95
FBAC = 10 (SWSL)11/28/95
NCGQS = 20 (2L Std)02/28/96
2L Std = 50 (pre- Jan. 2010)08/27/96
2L Std = 20 (Jan. 2010)02/27/97
09/04/97
03/25/98
11/02/98
04/27/99
11/22/99
05/24/00
11/30/00
05/30/01
11/14/01
06/06/02
03/13/03
06/19/03
12/09/03
06/23/04
12/01/04
11/03/05
05/24/06
11/15/06
06/14/07
12/11/07
06/09/08
11/06/08
05/20/09 <3.4 3.4 J <3.4 6.5 J <3.4 <3.4 <3.4 3.4 10
10/20/09 <2.7 <2.7 <2.7 <2.7 <2.7 <2.7 <2.7 2.7 10
06/23/10 <0.83 <0.83 <0.83 <0.83 <0.83 <0.83 <0.83 0.83 10
11/17/10 <0.83 <0.83 <0.83 <0.83 <0.83 <0.83 <0.83 0.83 10 i
05/25/11 <0.83 <0.83 <0.83 <0.83 <0.83 <0.83 <0.83 0.83 10
11/16/11 1.96 J <0.83 0.993 J <0.83 1.01 J <0.83 <0.83 0.83 10
06/07/12 <0.83 <0.83 <0.83 <0.83 <0.83 <0.83 <0.83 0.83 10
11/14/12 <0.83 0.927 J <0.83 <0.83 <0.83 <0.83 <0.83 0.83 10
05/14/13 <0.91 <0.91 <0.91 <0.91 <0.91 <0.91 <0.91 0.91 10
11/13/13 <0.910 <0.910 <0.910 <0.910 <0.910 <0.910 <0.910 0.910 10
05/14/14 <0.910 <0.910 <0.910 <0.910 <0.910 <0.910 <0.910 0.910 10
11/12/14 <0.910 <0.910 <0.910 <0.910 <0.910 <0.910 <0.910 0.910 10
05/13/15 <0.910 <0.910 <0.910 <0.910 <0.910 <0.910 <0.910 0.910 10
06/16/15 verification
11/10/15 <0.910 <0.910 <0.910 <0.910 <0.910 <0.910 <0.910 0.910 10
LOD SWSL QA/QCMW-107 MW-108 MW-110D MW110S MW-111 MW-112MW-106ConstituentWell / Date
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
selenium 05/18/95
MCL = 50 07/20/95
FBAC = 10 (SWSL)11/28/95
NCGQS = 20 (2L Std)02/28/96
2L Std = 50 (pre- Jan. 2010)08/27/96
2L Std = 20 (Jan. 2010)02/27/97
09/04/97
03/25/98
11/02/98
04/27/99
11/22/99
05/24/00
11/30/00
05/30/01
11/14/01
06/06/02
03/13/03
06/19/03
12/09/03
06/23/04
12/01/04
11/03/05
05/24/06
11/15/06
06/14/07
12/11/07
06/09/08
11/06/08
05/20/09 <3.4 <3.4 5.9 J 5.0 J <3.4 3.4 10
10/20/09 <2.7 <2.7 <2.7 <2.7 <2.7 2.7 10
06/23/10 <0.83 <0.83 <0.83 <0.83 <0.83 0.83 10
11/17/10 <0.83 <0.83 <0.83 <0.83 <0.83 0.83 10 i
05/25/11 <0.83 <0.83 <0.83 <0.83 <0.83 <0.83 0.83 10
11/16/11 <0.83 <0.83 <0.83 <0.83 <0.83 <0.83 0.83 10
06/07/12 <0.83 <0.83 <0.83 <0.83 <0.83 <0.83 0.83 10
11/14/12 <0.83 <0.83 <0.83 <0.83 <0.83 0.83 10
05/14/13 <0.91 <0.91 <0.91 <0.91 <0.91 0.91 10
11/13/13 <0.910 <0.910 <0.910 <0.910 <0.910 0.910 10
05/14/14 <0.910 <0.910 <0.910 <0.910 <0.910 0.910 10
11/12/14 <0.910 <0.910 <0.910 <0.910 <0.910 0.910 10
05/13/15 <0.910 <0.910 <0.910 <0.910 <0.910 0.910 10
06/16/15
11/10/15 <0.910 <0.910 <0.910 <0.910 <0.910 0.910 10
MW-102
DR
Constituent Well / Date MW-101 MW-102S MW-102D MW-103D MW-103S MW-104 MW-105 LOD SWSL QA/QC
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
silver 05/18/95 <10 <10 <10 <10 <10 <10 <10
MCL = 07/20/95 <10 <10 <10 <10 <10 <10 <10
FBAC = 10 (SWSL)11/28/95 <10 <10 <10 <10 <10 <10 <10
NCGQS = 20 (2L Std)02/28/96 <10 <10 <10 <10 <10 <10 <10
2L Std = 17.5 (pre- Jan. 2010)08/27/96 <10 <10 <10 <10 <10 <10 <10
2L Std = 20 (Jan. 2010)02/27/97 <10 <10 <10 <10 <10 <10 <10
09/04/97 <10 <10 <10 <10 <10 <10 <10
03/25/98 <10 <10 <10 <10 <10 <10 <10 i,lc
11/02/98 <10 <10 <10 <10 <10 <10 <10 ics
04/27/99 <10 <10 <10 <10 <10 <10 <10 i
11/22/99 <10 <10 <10 <10 <10 <10 <10
05/24/00 <10 <10 <10 <10 <10 <10 <10 i,cc
11/30/00 <10 <10 <10 <10 <10 <10 <10
05/30/01 <10 <10 <10 <10 <10 <10 <10 i, f, t
11/14/01 <10 <10 <10 <10 <10 <10 <10
06/06/02 <10 <10 <10 <10 <10 <10 <10
03/13/03 <10 <10 <10 <10 <10 <10 <10
06/19/03 <10 <10 <10 <10 <10 <10 <10
12/09/03 <10 <10 <10 <10 <10 <10 <10
06/23/04 <10 <10 <10 <10 <10 <10 <10
12/01/04 <10 <10 <10 <10 <10 <10 <10
11/03/05 <10 <10 <10 <10 <10 <10 <10
05/24/06 <10 <10 <10 <10 <10 <10 <10
11/15/06 <10 <10 <10 <10 <10 <10 <10
06/14/07 <1.1 <1.1 <1.1 <1.1 <1.1 <1.1 <1.1 1.1 10 cc
12/11/07 <1.1 <1.1 <1.1 <1.1 <1.1 <1.1 <1.1 1.1 10
06/09/08 1.9 J <1.1 <1.1 <1.1 <1.1 <1.1 <1.1 1.1 10
11/06/08 <1.1 <1.1 <1.1 <1.1 <1.1 <1.1 2.5 JB 1.1 10 i
05/20/09 1.1 J <1 <1 1.0 J <1 <1 1.5 J 1 10
10/20/09 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 1.9 10
06/23/10 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 1.9 10
11/17/10 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 1.9 10
05/25/11 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 2.23 J 1.9 10
11/16/11 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 1.9 10
06/07/12 <1.9 <1.9 <1.9 2.09 J <1.9 <1.9 3.58 J 1.9 10
11/14/12 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 1.9 10
05/14/13 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 2.82 JB 1.9 10 i
11/13/13 <1.90 <1.90 <1.90 <1.90 <1.90 <1.90 <1.90 1.90 10
05/14/14 <1.90 <1.90 <1.90 <1.90 <1.90 <1.90 <1.90 1.90 10
11/12/14 <1.90 <1.90 <1.90 <1.90 <1.90 <1.90 2.14 J 1.90 10
05/13/15 <1.90 <1.90 <1.90 <3.80 <1.90 <1.90 <1.90 1.90/3.80 10
06/16/15 verification
11/10/15 2.38 J <1.90 <1.90 2.77 J <1.90 <1.90 2.65 J 1.90 10
LOD SWSL QA/QCMW-107 MW-108 MW-110D MW110S MW-111 MW-112MW-106ConstituentWell / Date
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
silver 05/18/95 <10 <10 <10 <10 <10 <10
MCL = 07/20/95 <10 <10 <10 <10 <10 <10
FBAC = 10 (SWSL)11/28/95 <10 <10 <10 <10 <10 <10
NCGQS = 20 (2L Std)02/28/96 <10 <10 <10 <10 <10 <10
2L Std = 17.5 (pre- Jan. 2010)08/27/96 <10 <10 <10 <10 <10 <10
2L Std = 20 (Jan. 2010)02/27/97 <10 <10 <10 <10 <10 <10
09/04/97 <10 <10 <10 <10 <10 <10
03/25/98 <10 <10 <10 14 B 10 B <10 i,lc
11/02/98 <10 <10 <10 <10 <10 ics
04/27/99 <10 <10 <10 <10 <10 <10 i
11/22/99 <10 <10 <10 <10 <10 <10
05/24/00 <10 <10 16 B <10 <10 <10 i,cc
11/30/00 <10 <10 <10 <10 <10 <10
05/30/01 <10 <10 <10 <10 <10 <10 i, f, t
11/14/01 <10 <10 <10 <10 <10 <10
06/06/02 <10 <10 <10 <10 <10 <10
03/13/03 <10 <10 <10 <10
06/19/03 <10 <10 <10 <10
12/09/03 <10 <10 <10 <10
06/23/04 <10 <10 <10 <10
12/01/04 <10 <10 <10 <10
11/03/05 <10 <10 <10 <10
05/24/06 <10 <10 <10 <10
11/15/06 <10 <10 <10 <10
06/14/07 <1.1 <1.1 <1.1 <1.1 <1.1 1.1 10 cc
12/11/07 <1.1 <1.1 <1.1 <1.1 <1.1 1.1 10
06/09/08 <1.1 <1.1 <1.1 <1.1 <1.1 1.1 10
11/06/08 <1.1 <1.1 <1.1 <1.1 <1.1 1.1 10 i
05/20/09 <1 1.0 J <1 <1 <1.0 1 10
10/20/09 <1.9 <1.9 <1.9 <1.9 <1.9 1.9 10
06/23/10 <1.9 <1.9 <1.9 <1.9 <1.9 1.9 10
11/17/10 <1.9 <1.9 <1.9 <1.9 <1.9 1.9 10
05/25/11 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 1.9 10
11/16/11 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 1.9 10
06/07/12 <1.9 <1.9 <1.9 <1.9 <1.9 2.4 J 1.9 10
11/14/12 <1.9 <1.9 <1.9 <1.9 <1.9 1.9 10
05/14/13 <1.9 <1.9 2.13 J <1.9 2.14 JB 1.9 10 i
11/13/13 <1.90 <1.90 <1.90 <1.90 <1.90 1.90 10
05/14/14 <1.90 <1.90 <1.90 <1.90 <1.90 1.90 10
11/12/14 <1.90 <1.90 <1.90 <1.90 <1.90 1.90 10
05/13/15 <1.90 180 R <1.90 <1.90 <1.90 1.90/3.80 10
06/16/15 <1.90 1.90 10 verification
11/10/15 <1.90 <1.90 <1.90 <1.90 2.53 J 1.90 10
MW-102
DR
Constituent Well / Date MW-101 MW-102S MW-102D MW-103D MW-103S MW-104 MW-105 LOD SWSL QA/QC
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
thallium 05/18/95
MCL = 2 07/20/95
FBAC = 5.5 (SWSL)11/28/95
NCGQS =0.2 (GWPS)02/28/96
08/27/96
02/27/97
09/04/97
03/25/98
11/02/98
04/27/99
11/22/99
05/24/00
11/30/00
05/30/01 i, f, t
11/14/01
06/06/02
03/13/03
06/19/03
12/09/03
06/23/04
12/01/04
06/06/05
11/03/05
05/24/06
11/15/06
06/14/07
12/11/07 <2.7 <2.7 3.4 JB <2.7 <2.7 <2.7 <2.7 2.7 5.5 f
06/09/08 <2.7 <2.7 <2.7 <2.7 <2.7 <2.7 <2.7 2.7 5.5
11/06/08 <2.7 <2.7 <2.7 <2.7 <2.7 <2.7 <2.7 2.7 5.5 i
05/20/09 <0.036 <0.036 <0.036 <0.036 <0.036 <0.036 <0.036 0.036 5.5 i
10/20/09 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 5.5
06/23/10 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 5.5
11/17/10 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 5.5
05/25/11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 5.5
11/16/11 0.726 JB <0.11 <0.11 <0.11 0.538 JB <0.11 <0.11 0.11 5.5 i
06/07/12 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 5.5
11/14/12 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 5.5
05/14/13 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 5.5
11/13/13 <0.110 <0.110 <0.110 <0.110 <0.110 <0.110 <0.110 0.110 5.5
05/14/14 <0.110 <0.110 <0.110 <0.110 <0.110 <0.110 <0.110 0.110 5.5
11/12/14 <0.110 <0.110 <0.110 <0.110 <0.110 <0.110 <0.110 0.110 5.5
05/13/15 <0.110 <0.110 <0.110 <0.110 <0.110 <0.110 <0.110 0.110 5.5
06/16/15 verification
11/10/15 <0.110 <0.110 <0.110 <0.110 <0.110 <0.110 <0.110 0.110 5.5
LOD SWSL QA/QCMW-107 MW-108 MW-110D MW110S MW-111 MW-112MW-106ConstituentWell / Date
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
thallium 05/18/95
MCL = 2 07/20/95
FBAC = 5.5 (SWSL)11/28/95
NCGQS =0.2 (GWPS )02/28/96
08/27/96
02/27/97
09/04/97
03/25/98
11/02/98
04/27/99
11/22/99
05/24/00
11/30/00
05/30/01
11/14/01
06/06/02
03/13/03
06/19/03
12/09/03
06/23/04
12/01/04
06/06/05
11/03/05
05/24/06
11/15/06
06/14/07
12/11/07 <2.7 <2.7 <2.7 <2.7 5.2 JB 2.7 5.5 f
06/09/08 <2.7 <2.7 <2.7 <2.7 <2.7 2.7 5.5
11/06/08 <2.7 <2.7 4.7 JB <2.7 4.4 JB 2.7 5.5 i
05/20/09 <0.036 <0.036 <0.036 <0.036 <0.036 0.036 5.5 i
10/20/09 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 5.5
06/23/10 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 5.5
11/17/10 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 5.5
05/25/11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 5.5
11/16/11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 5.5 i
06/07/12 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 5.5
11/14/12 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 5.5
05/14/13 <0.11 <0.11 <0.11 <0.11 <0.11 0.11 5.5
11/13/13 <0.110 <0.110 <0.110 <0.110 <0.110 0.110 5.5
05/14/14 <0.110 <0.110 <0.110 <0.110 <0.110 0.110 5.5
11/12/14 <0.110 <0.110 <0.110 <0.110 <0.110 0.110 5.5
05/13/15 <0.110 <0.110 <0.110 <0.110 <0.110 0.110 5.5
06/16/15
11/10/15 <0.110 <0.110 <0.110 <0.110 <0.110 0.110 5.5
MW-102
DR
Constituent Well / Date MW-101 MW-102S MW-102D MW-103D MW-103S MW-104 MW-105 LOD SWSL QA/QC
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
tin 05/18/95
MCL = 07/20/95
FBAC = 100 (SWSL)11/28/95
NCGQS =2000 (GWPS)02/28/96
GWPS = 2100 (pre-Oct. 2010)08/27/96
GWPS = 2000 (Oct. 2010)02/27/97
09/04/97
03/25/98
11/02/98
04/27/99
11/22/99
05/24/00
11/30/00
05/30/01
11/14/01
06/06/02
03/13/03
06/19/03
12/09/03
06/23/04
12/01/04
06/06/05
11/03/05
05/24/06
11/15/06
06/14/07
12/11/07
06/09/08
11/06/08
05/20/09
10/20/09 5.95 J 3.52 J 6.37 J 7.68 J 4.06 J 4.37 J 2.86 J 2.1 100
06/23/10
11/17/10 2.70 J 2.1 100 i
05/25/11
11/16/11 2.62 J 2.1 100
06/07/12
11/14/12 3.47 J 2.1 100
05/14/13
11/13/13 <2.1 2.1 100
05/14/14
11/12/14 <2.10 2.10 100
05/13/15
06/16/15 verification
11/10/15 <2.40 2.40 100
LOD SWSL QA/QCMW-107 MW-108 MW-110D MW110S MW-111 MW-112MW-106ConstituentWell / Date
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
tin 05/18/95
MCL = 07/20/95
FBAC = 100 (SWSL)11/28/95
NCGQS =2000 (GWPS)02/28/96
GWPS = 2100 (pre-Oct. 2010)08/27/96
GWPS = 2000 (Oct. 2010)02/27/97
09/04/97
03/25/98
11/02/98
04/27/99
11/22/99
05/24/00
11/30/00
05/30/01
11/14/01
06/06/02
03/13/03
06/19/03
12/09/03
06/23/04
12/01/04
06/06/05
11/03/05
05/24/06
11/15/06
06/14/07
12/11/07
06/09/08
11/06/08
05/20/09
10/20/09 4.64 J <2.1 3.34 J <2.1 2.1 100
06/23/10
11/17/10 2.1 100 i
05/25/11
11/16/11 2.1 100
06/07/12
11/14/12 2.1 100
05/14/13
11/13/13 2.1 100
05/14/14
11/12/14 2.10 100
05/13/15
06/16/15
11/10/15 2.40 100
MW-102
DR
Constituent Well / Date MW-101 MW-102S MW-102D MW-103D MW-103S MW-104 MW-105 LOD SWSL QA/QC
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
vanadium 05/18/95 285 <40 <40 <40 <40 <40 <40
MCL = 07/20/95 <40 <40 <40 <40 <40 <40 <40
FBAC = 25 (SWSL)11/28/95 55 <40 <40 <40 344 <40 <40
NCGQS = 0.3 (GWPS)02/28/96 <40 <40 <40 <40 88 <40 <40 i,t,f,sd
GWPS = 3.5 (pre-Oct. 2010)08/27/96 <40 <40 <40 <40 <40 <40 <40 i,t,f
GWPS = 0.3 (Oct. 2010)02/27/97 <40 <40 <40 <40 <40 <40 <40
09/04/97 <40 <40 <40 <40 <40 <40 <40
03/25/98 <40 <40 <40 <40 54 <40 <40
11/02/98 <40 <40 <40 <40 <40 <40 <40 ics
04/27/99 <40 <40 <40 <40 <40 <40 <40
11/22/99 <40 <40 <40 <40 <40 <40 <40
05/24/00 <40 <40 <40 <40 <40 <40 <40
11/30/00 <40 <40 <40 <40 <40 <40 <40
05/30/01 <40 <40 <40 <40 <40 <40 <40 i, f, t
11/14/01 <40 <40 <40 <40 <40 <40 <40
06/06/02 <40 <40 <40 <40 <40 <40 <40
03/13/03 <40 <40 <40 <40 <40 <40 <40
06/19/03 <40 <40 <40 <40 <40 <40 <40
12/09/03 <40 <40 <40 <40 <40 <40 <40
06/23/04 <40 <40 <40 <40 <40 <40 <40
12/01/04 <40 <40 <40 <40 <40 <40 <40
06/06/05 <40 <40 <40 <40 <40 <40 <40
11/03/05 <40 <40 <40 <40 <40 <40 <40
05/24/06 <40 <40 <40 <40 <40 <40 <40
11/15/06 <40 <40 <40 <40 <40 <40 <40
06/14/07 1.1 J 0.4 J 0.7 J <0.4 <0.4 <0.4 <0.4 0.4 25
12/11/07 0.98 J 0.8 J <0.4 <0.4 <0.4 3.8 J <0.4 0.4 25
06/09/08 3 JB 2.3 JB 2.3 JB 0.9 JB 1 JB 1.3 JB 1 JB 0.4 25 t, f
11/06/08 4.1 JB 0.7 JB 1.5 JB <0.4 <0.4 <0.4 25 J 0.4 25 f
05/20/09 8.2 J <0.7 4.9 J <0.7 10.1 J <0.7 <0.7 0.7 25
10/20/09 41.4 <1.4 3.9 J <1.4 3.98 J <1.4 <1.4 1.4 25
verification event 11/20/09 30.4 1.4 25
verification event 12/17/09 77.7 1.4 25
06/23/10 2.14 J <1.4 2.65 J <1.4 5.83 J <1.4 <1.4 1.4 25
11/17/10 2.68 J <1.4 1.45 J <1.4 <1.4 <1.4 <1.4 1.4 25
05/25/11 4.05 J <1.4 1.74 J <1.4 1.71 J <1.4 <1.4 1.4 25
11/16/11 2.68 J <1.4 1.62 J <1.4 <1.4 <1.4 <1.4 1.4 25
06/07/12 6.11 J <1.4 <1.4 <1.4 <1.4 <1.4 <1.4 1.4 25
11/14/12 7.22 J <1.4 <1.4 <1.4 <1.4 <1.4 <1.4 1.4 25
05/14/13 <1.4 <1.4 <1.4 <1.4 10.6 J <1.4 <1.4 1.4 25
11/13/13 1.70 J <1.40 <1.40 <1.40 <1.40 <1.40 <1.40 1.40 25
05/14/14 <1.40 <1.40 1.66 J <1.40 <1.40 <1.40 <1.40 1.40 25
11/12/14 10.1 J <1.40 <1.40 <1.40 <1.40 <1.40 <1.40 1.40 25
05/13/15 4.40 J <1.40 <1.40 <2.80 <1.40 <1.40 <1.40 1.40/2.80 25
06/16/15 verification
11/10/15 <1.40 3.98 J <1.40 <1.40 <1.40 <1.40 <1.40 1.40 25
LOD SWSL QA/QCMW-107 MW-108 MW-110D MW110S MW-111 MW-112MW-106ConstituentWell / Date
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
vanadium 05/18/95 <40 <40 <40 <40 <40 147
MCL = 07/20/95 <40/<40 <40 <40 <40 <40 <40
FBAC = 25 (SWSL)11/28/95 67 <40 81 261 <40 <40
NCGQS = 0.3 (GWPS)02/28/96 <40 <40 <40 <40 <40 <40 i,t,f,sd
GWPS = 3.5 (pre-Oct. 2010)08/27/96 <40 <40 <40 <40 <40 <40 i,t,f
GWPS = 0.3 (Oct. 2010)02/27/97 <40 <40 <40 <40 <40 <40
09/04/97 <40 <40 <40 <40 <40 <40
03/25/98 <40 <40 <40 <40 <40 <40
11/02/98 <40 <40 <40 <40 <40 ics
04/27/99 <40 <40 <40 <40 <40 <40
11/22/99 <40 <40 <40 <40 <40 <40
05/24/00 <40 <40 <40 <40 <40 <40
11/30/00 <40 <40 <40 <40 <40 <40
05/30/01 <40 <40 <40 <40 <40 <40 i, f, t
11/14/01 <40 <40 <40 <40 <40 <40
06/06/02 <40 <40 <40 <40 <40 <40
03/13/03 <40 <40 <40 <40
06/19/03 <40 <40 <40 <40
12/09/03 <40 <40 <40 <40
06/23/04 <40 <40 <40 <40
12/01/04 <40 <40 <40 <40
06/06/05 <40 <40 <40 <40 <40
11/03/05 <40 <40 <40 <40 <40
05/24/06 <40 <40 <40 <40 <40
11/15/06 <40 <40 <40 <40 <40
06/14/07 <0.4 0.8 J <0.4 <0.4 <0.4 0.4 25
12/11/07 <0.4 <0.4 <0.4 <0.4 0.7 J 0.4 25
06/09/08 2 JB 5 J 1.9 JB <0.4 3.8 JB 0.4 25 t, f
11/06/08 0.6 JB 1 JB 1.4 JB <0.4 2.1 JB 0.4 25 f
05/20/09 3.7 J <0.7 1.0 J <0.7 3.2 J 0.7 25
10/20/09 6.28 J <1.4 2.19 J 5.2 J <1.4 1.4 25
verification event 11/20/09 1.4 25
verification event 12/17/09 1.4 25
06/23/10 2.79 J 1.71 J <1.4 <1.4 2.67 J 1.4 25
11/17/10 <1.4 1.72 J <1.4 <1.4 2.45 J 1.4 25
05/25/11 1.55 J 1.66 J 1.6 J <1.4 6.07 J <1.4 1.4 25
11/16/11 2 J 2.02 J <1.4 <1.4 12.2 J <1.4 1.4 25
06/07/12 <1.4 <1.4 <1.4 <1.4 5.08 J <1.4 1.4 25
11/14/12 <1.4 <1.4 <1.4 3.31 J <1.4 1.4 25
05/14/13 2.85 J <1.4 <1.4 <1.4 2.97 J 1.4 25
11/13/13 <1.40 <1.40 <1.40 <1.40 <1.40 1.40 25
05/14/14 1.83 J <1.40 <1.40 20.1 J 1.52 J 1.40 25
11/12/14 1.69 J <1.40 <1.40 5.49 J <1.40 1.40 25
05/13/15 <1.40 197 R <1.40 5.72 J <1.40 1.40/2.80 25
06/16/15 <1.40 1.40 25 verification
11/10/15 2.55 J 5.21 J 1.51 J 6.31 J <1.40 1.40 25
MW-102
DR
Constituent Well / Date MW-101 MW-102S MW-102D MW-103D MW-103S MW-104 MW-105 LOD SWSL QA/QC
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
zinc 05/18/95 282 J <50 <50 <50 <50 <50 <50 i,f,t,ms,sd
MCL = 07/20/95 79 B <50 <50 <50 <50 <50 <50 i,f,t
FBAC = 52.5 (SPL)11/28/95 71 B 208 B 73 B 88 B 520 B <50 <50 i,f,t
NCGQS = 1000 (2L Std)02/28/96 <50 68 <50 <50 165 J <50 <50 i,t,sd
2L Std = 1050 (pre- Jan. 2010)08/27/96 <50 <50 <50 <50 53 B <50 <50 i,t,f,ms
2L Std = 1000 (Jan. 2010)02/27/97 89 B <50 126 B 79 B 78 B 103 B 65 B i,t,f,sd
09/04/97 <50 80 B <50 <50 <50 225 B <50 t,f,sd
03/25/98 <50 <50 <50 <50 115 B <50 <50 i,t,f
11/02/98 <50 <50 <50 <50 <50 <50 <50 i,t,lcs
04/27/99 <50 <50 <50 <50 <50 <50 <50 i,t,f
11/22/99 <50 <50 81 B <50 <50 <50 50 B i,t,f,q
05/24/00 <50 <50 <50 <50 <50 <50 86 B cc,i,t,f
11/30/00 <50 <50 <50 <50 <50 <50 <50
05/30/01 <50 80 B <50 <50 <50 <50 <50 i,t,f
11/14/01 <50 <50 <50 <50 <50 <50 <50 i,t,f
06/06/02 <50 <50 <50 <50 <50 <50 <50 t,f
03/13/03 <50 <50 <50 <50 <50 <50 <50
06/19/03 <50 <50 <50 <50 <50 <50 <50
12/09/03 <50 <50 <50 <50 <50 <50 <50
06/23/04 <50 <50 <50 <50 <50 <50 <50
12/01/04 <50 <50 <50 <50 <50 <50 <50
06/06/05 <50 <50 <50 <50 <50 81 <50
11/03/05 <50 <50 <50 <50 <50 <50 <50
05/24/06 <50 <50 <50 <50 <50 <50 <50
11/15/06 <50 <50 <50 <50 <50 <50 <50
06/14/07 6.1 JB 5.4 JB 3.4 JB 3.1 JB 18.7 18.8 8.5 JB 2.7 10 t, f
12/11/07 10.3 B 46 7.6 JB 65 56.8 30.9 B 13.5 B 2.7 10 t, i
06/09/08 <2.7 <2.7 <2.7 <2.7 <2.7 <2.7 <2.7 2.7 10
11/06/08 14.6 B <2.7 <2.7 <2.7 <2.7 <2.7 <2.7 2.7 10 i
05/20/09 18.1 <3.4 <3.4 <3.4 16.4 <3.4 <3.4 3.4 10
10/20/09 24.6 <3.8 <3.8 <3.8 <3.8 <3.8 <3.8 3.8 10
06/23/10 19.6 4.85 J 4.58 J 4.84 J 12 <3.8 <3.8 3.8 10
11/17/10 21.7 5.58 J <3.8 <3.8 <3.8 <3.8 <3.8 3.8 10
05/25/11 13.4 4.78 J <3.8 <3.8 <3.8 <3.8 <3.8 3.8 10
11/16/11 6.2 J <3.8 <3.8 <3.8 <3.8 <3.8 3.87 J 3.8 10
06/07/12 5.78 J <3.8 <3.8 <3.8 5.15 J <3.8 <3.8 3.8 10
11/14/12 11.2 <3.8 <3.8 <3.8 <3.8 <3.8 4.13 J 3.8 10
05/14/13 5.88 J <3.8 <3.8 <3.8 7.33 J <3.8 <3.8 3.8 10
11/13/13 3.87 J 4.15 J <3.80 <3.80 <3.80 <3.80 4.09 J 3.80 10
05/14/14 <3.80 <3.80 <3.80 <3.80 <3.80 <3.80 <3.80 3.80 10
11/12/14 9.29 J 4.03 J <3.80 4.39 J <3.80 4.03 J 4.12 J 3.80 10
05/13/15 4.21 J <3.80 <3.80 <7.60 <3.80 <3.80 <3.80 3.80/7.60 10
06/16/15 verification
11/10/15 <3.80 <3.80 <3.80 <3.80 <3.80 <3.80 <3.80 3.80 10
LOD SWSL QA/QCMW-107 MW-108 MW-110D MW110S MW-111 MW-112MW-106ConstituentWell / Date
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
zinc 05/18/95 <50 <50 243 J <50 72 B 86 B i,f,t,ms,sd
MCL = 07/20/95 64 B/<50 <50 <50 69 B 64 B <50 i,f,t
FBAC = 52.5 (SPL)11/28/95 126 B 79 B 176 B 628 B 117 B 50 B i,f,t
NCGQS = 1000 (2L Std)02/28/96 61 <50 <50 66 120 J 70 i,t,sd
2L Std = 1050 (pre- Jan. 2010)08/27/96 56 B <50 <50 <50 <50 <50 i,t,f,ms
2L Std = 1000 (Jan. 2010)02/27/97 80 B <50 59 B 80 B 90 B 94 B i,t,f,sd
09/04/97 <50 <50 54 B 65 B 105 B <50 t,f,sd
03/25/98 54 B 55 B 51 B <50 316 B 52 B i,t,f
11/02/98 <50 <50 55 B <50 <50 i,t,lcs
04/27/99 <50 <50 <50 <50 <50 <50 i,t,f
11/22/99 <50 58 B 137 B 52 B 75 B 50 B i,t,f,q
05/24/00 <50 63 B <50 53 B <50 <50 cc,i,t,f
11/30/00 <50 <50 <50 <50 <50 <50
05/30/01 <50 <50 <50 55 B 158 B 52 B i,t,f
11/14/01 <50 <50 <50 <50 <50 <50 i,t,f
06/06/02 <50 <50 <50 <50 <50 <50 t,f
03/13/03 <50 <50 <50 <50
06/19/03 <50 <50 <50 <50
12/09/03 <50 <50 <50 <50
06/23/04 <50 <50 <50 <50
12/01/04 <50 <50 <50 <50
06/06/05 <50 <50 <50 <50 <50
11/03/05 <50 <50 <50 <50 <50
05/24/06 <50 <50 <50 <50 <50
11/15/06 <50 <50 <50 <50 <50
06/14/07 5.5 JB 35.6 20.7 14.8 B <2.7 2.7 10 t, f
12/11/07 28.2 B 17 B 12.4 B 17.2 B 13.2 B 2.7 10 t, i
06/09/08 <2.7 13.4 <2.7 <2.7 <2.7 2.7 10
11/06/08 <2.7 <2.7 13.2 B <2.7 <2.7 2.7 10 i
05/20/09 22.8 <3.4 4.8 J <3.4 <3.4 3.4 10
10/20/09 5.29 J 4.07 J 5.69 J 4.9 J 5.83 J 3.8 10
06/23/10 16 10.9 4.9 J 6.9 J 14.1 3.8 10
11/17/10 6.13 J 14 4.47 J 3.83 J 4 J 3.8 10
05/25/11 8.94 J 3.94 J 4.88 J 4.01 J 8.68 J <3.8 3.8 10
11/16/11 <3.8 12.4 <3.8 4.42 J 5.08 J <3.8 3.8 10
06/07/12 10.6 <3.8 <3.8 <3.8 <3.8 <3.8 3.8 10
11/14/12 5.41 J 8.68 J <3.8 <3.8 4.91 J 3.8 10
05/14/13 5.5 J <3.8 <3.8 <3.8 <3.8 3.8 10
11/13/13 <3.80 9.08 J 4.06 J 7.82 J <3.80 3.80 10
05/14/14 <3.80 <3.80 <3.80 6.17 J <3.80 3.80 10
11/12/14 5.82 J 4.60 J 10.8 27.8 4.30 J 3.80 10
05/13/15 <3.80 218 R 4.16 J 3.84 J <3.80 3.80/7.60 10
06/16/15 <3.80 3.80 10 verification
11/10/15 <3.80 <3.80 <3.80 <3.80 <3.80 3.80 10
MW-102
DR
Constituent Well / Date MW-101 MW-102S MW-102D MW-103D MW-103S MW-104 MW-105 LOD SWSL QA/QC
INORGANIC CONSTITUENTS: TOTAL METALS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
All results in µg/L.
Shaded cells indicate data not available.
Upgradient wells not shaded.
Blue bolded values indicate concentrations that exceeded the FBAC.
Red bolded values indicate concentrations that exceeded the NCGQS.
Green bolded cells indicate concentrations that were >LOD but <SWSL.
B - detect associated with blank contamination J - concentration is estimated
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 d - duplicates beyond limits
ss - surrogate spikes beyond limits is - internal standard beyond limits
sd - serial dilution beyond limits ms - matrix spike beyond limits
ics - interference check sample beyond limits lcs – laboratory control sample beyond limits
q – reporting limit standard beyond limits msd - matrix spike duplicate beyond limits
FBAC – facility background NCGQS - Groundwater Standard, as established by the NCDENR
SWSL - solid waste section limit, as established by NCDENR SPL – statistical prediction limit
GWPS - ground water protection standard
43HistInorgSOUTH FACILITY.592

ATTACHMENT 7

LABORATORY CERTIFICATES-OF-ANALYSIS

CHAINS-OF-CUSTODY

QUALITY CONTROL INFORMATION

SOUTH LANDFILL WELLS

JOINT WELLS

[SOUTH LANDFILL + C&D LANDFILL]

TRIP BLANK

LEACHATE

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, 2015 (sampling event 43), Sherrill Environmental personnel obtained
groundwater samples from thirteen groundwater monitoring wells at the Orange County Solid
Waste Management South Facility (south side of Eubanks Road). During the subject sampling
event, the laboratory performed the following chemical analyses:
 samples obtained from eleven compliance wells (6801-MW101, 6801-MW102S, 6801-
MW102DR, 6801-MW103S, 6801-MW103D, 6801-MW104, 6801-MW106, 6801-
MW107, 6801-MW110S, 6801-MW111, 6801-MW112) were analyzed for the constituents
listed in Appendix I
 samples obtained from one compliance well (6801-MW105) were analyzed for the
constituents listed in Appendix II
 additional samples obtained from well 6801-MW110S were analyzed for constituents
required by regulations for monitoring groundwater at C&D landfills (manganese, iron,
mercury, chloride, sulfate, tetrahydrofuran, total dissolved solids, alkalinity) (well 6801-
MW110S is associated with the monitoring programs for both the active C&D landfill
and South sanitary landfill)
 samples obtained from well 6801-MW110D were analyzed for total arsenic
 samples obtained from the leachate collection system at the South Facility were analyzed
for the constituents listed in Appendix I, plus BOD, COD, manganese, mercury, nitrate,
sulfate, and phosphorus

Well 6801-MW109 was not sampled because it is used only as a piezometer to monitor static
water elevations. Well 6801-MW108 was not sampled because NCDENR no longer requires
that this well be sampled on a regular schedule.

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.

Field Data
Page 2

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 with an electric compressor that was driven by a battery and 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.

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.

Field Data
Page 3

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 using the dedicated pumps immediately after pH, specific
conductance, and temperature had stabilized. Additional samples for laboratory QA/QC
analyses were obtained from well 6801-MW110S.

1.7 Well Sampling Order

On November 10, 2015, Sherrill personnel sampled wells in the following order: 6801-MW111,
6801-MW101, 6801-MW102DR, 6801-MW102S, 6801-MW104, 6801-MW103S, 6801-
MW103D, 6801-MW112, 6801-MW105, 6801-MW106, 6801-MW107, 6801-MW110S, 6801-
MW110D.

On November 10, 2015, Sherrill personnel sampled a manhole associated with the leachate
collection system.

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.

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 for event 43 were delivered by Sherrill personnel to ENCO on November 11, 2015.
Field Data
Page 4

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 -SOUTH Permit No.: 68-01 Client : Draper Aden WELL NUMBER: MWlOl Well I.Diam: Measurements from TOC Screened interval: Date: 11117)2015 Time: ID /0 Weather: ~ ~l> -=-----Personnel: J. Sherrill, LG ------Total well depth (TD): 38.33 Depth to water (DTW): IL., 0, 2... Length of water column: "Z_'S, 4 { Volume in well (gal): _4--'--",0=---Total water volume purged: 3 r 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)
f 10 I DI t; 1.J)S ,~,~ Orl,IL( /4. I -I it. I '5, 2.
1.lo IDW b.lt:J I t:.Cis !), 413 2-S-~ -C,t,. 9 2,D
3.D I Dz; G, pt: l /o.(J< 0. '19, ') 2.'1, 8 -91,o D,C,
Remarks on Sampling and Well Condition:
Sample Collection Time: f O L =J
Sherrill Environmental, Inc. GROUNDWATER SAMPLING FIELD DATA WORKSHEET Project Name: Orange Co. LF -SOUTH Permit No.: 68-01 Client : Draper Aden WELL NUMBER: MW102S Well I.Diam: Measurements from TOC Screened interval: Date: Time: Weather: Personnel: 11/IQ'2015 ~D S~ 5 5 ov~rCA s"f J. Sherrill, LG Total well depth (T_D_)_: --2-7-.7-9-Depth to water {DTW): 't, 53 Length of water column: '2-3, Z.'1 Volume in well (gal): _3-=--·-":+ __ Total water volume purged: '3, "".:}-
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.D l lOD 6. 'I 3 r=tz8 D, z_:;g +.°t -l3ll 5 +.' Z·5 110~ b.'-(f j-=/.33 D, 22..':l-l I /2... -l'tSt~ l ::,. . 2.
3,0 I I 10 b, t.//; J-=/-.'{0 D, 2.2... =\ °1,3 -I ~8,3 2..2, it
3,5 t 11 s IP/lb I=?, tt2. D, Ll.3 °I. I, -I /.(brl, 2/, 3
3' :,-11 ZD b,4b l 1, 43 D,22-2-q,t, -/q {,,5 ZZ., l
Remarks on Sampling and Well Condition:
Sample Collection Time: I l '2 3
Sherrill Environmental, Inc. GROUNDWATER SAMPLING FIELD DATA WORKSHEET Project Name: Orange Co. LF -SOUTH Permit No.: 68-01 Client : Draper Aden WELL NUMBER: MW102DR Well I.Diam: Measurements from TOC Screened interval: ------Date: Time: Weather: Personnel: 11110'2015 /030 S5 J. Sherrill. LG Total well depth (TD): 57.5 Depth to water (DTW): ~' 3; Length of water column: S/, 15 Volume in well (gal): _8""'"'-'-r..._( __ Total water volume purged: ':(, 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)
().~ 1035 t,13 ,,.oo o, sP13 I<;. 2 -I ZZ,D C) I c,
1.,0 lD'IO 1. t 'i 15,q=1-D, 3 Oz I l O,D -l Z5.fs o, I
3,0 lb'1S f,/q 1 ;,q3 D. 391 8 ( :s -/ 2.t3 O.D
lf ,O l oso 1.2\ is.qi o. 3°1 l <at z. -I 20.:/ ()' ()
Remarks on Sampling and Well Condition:
Sample Collection Time: I O '5 5
~~-----~-----~--Sherrill Environmental, Inc. GROUNDWATER SAMPLING FIELD DATA WORKSHEET Project Name: Orange Co. LF -SOUTH Permit No.: 68-01 Client : Draper Aden WELL NUMBER: MW103S Well I.Diam: Measurements from TOC Screened interval: Date: 111/012015 Time: (I$~ Weather: fo O ----Personnel: J. Sherrill. LG ------Total well depth (TD): 37.98 Depth to water (DTW): I/ , °13 Length of water column: 26, 05 Volume in well (gal): __ '-f-'--'-r_2-__ Total water volume purged: 5 t O
Method Purged: Dedicated Bladder Pump
Method sampled: Dedicated Bladder Pump
Purge Time pH Temp Specific Dissolved ORP Turbidity
Vol. (G) (C) Cond. (mS/cm) Oxygen(%) (mV) (NTU)
,. C) 12Co 1,t,R IS.~ o.zqo q.s -(0{) ,1 Zt2_ 2.s LZ.OS tR3 1521 o. z'=t~ r t.t t ~ -/ 1)5,.g I. ,S
3.~ 12.ID =7.83 I ;,Sc I O I so "=l r:: I:, ,0 -I DS,1 t.-=i
"Stb ,z.,s =l.~.3 ,ss=,. f.J.~lZ.. 15,3 -1 ll.~ Z, I
Remarks on Sampling and Well Condition:
Sample Collection Time: / l.. l =!-
ct.ID
Sherrill Environmental, Inc. GROUNDWATER SAMPLING FIELD DATA WORKSHEET Project Name: Orange Co. LF -SOUTH Permit No.: 68-01 Date: 1111012015 Time: IL \B Weather: {pQ Client : Draper Aden ----WELL NUMBER: MW103D Well I.Diam: Measurements from TOC Screened interval: ------Personnel: J. Sherrill, LG Total well depth (TD): 68.51 Length of water column: 5 S', .lf I Total water volume purged: 'i r 5 Depth to water (DTW): I _b· ( 0 Volume in well (gal): S, B
Method Purged: Dedicated Bladder Pump
Method sampled:._--=D=ed=ic=a=te=d=B=la=dd=e"'-r=-Pum=p _________ _
Purge Time pH Temp Specific Dissolved ORP
Vol. (G) (C) Cond. (mS/cm) O,o,gen (%) (mV)
l.D 1225 "1,12 I lt:,.0-:/: o, ~=\-'B 32,+ -I 20, l
2,D t 2.30 ?-.11.t l ~ .t>S D, ;;t, 3 z_s. Lf. -12.~ .o
3,-S I l5$ :, .l) I th.OZ o. ~sq 2 S.to -/ z.f> pt
'i,S lit© -=1.'1 D l ~.{) l D,~~8 lt.t ' l -1 l'l. I
Remarks on Sampling and Well Condition:
Sample Collection Time: f -Z... Lf L
13.lD
Turbidity
(NTU)
G,, s
2, '1
, . 3
o.5
\ \ "70
Sherrill Environmental, Inc. GROUNDWATER SAMPLING FIELD DATA WORKSHEET Project Name: Orange Co. LF -SOUTH Permit No.: 68-01 Client : Draper Aden WELL NUMBER: MW104 Well I.Diam: Measurements from TOC Screened interval: ------Date: 11/t0'2015 Time: l l 30 .,..-c Weather: ? _.;, Personnel: J. Sherrill. LG Total well depth (TD): 38.14 Depth to water (DTW): IS, 3 ~ Length of water column: 7-Z..BI Volume in well (gal): --=3_.""""'b_' __ Total water volume purged: S tO
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)
Lf) It 3S -=/ .1f> t 5,,s 0, 2.~3 s.~ -/ ~b.2 '80,}; z..s l (L( c :, . r;:J. IS. =15 /'). 2... =l Lt 8. L.f -lz_q,o 2.2..2-
'1t() ll Li.S "=LR4 1~1t:. 6 t 2.. "=l~ ~( () -l 2..b,D 8,8
t:;tD t It{~ +,ltz l~.'.:1~ b, 2..=l-B g.a -(2.4.0 r,rq
~
Remarks on Sampling and Well Condition:
Sample Collection Time: r I 5 0
Sherrill Environmental, Inc. GROUNDWATER SAMPLING FIELD DATA WORKSHEET Project Name: Orange Co. LF -SOUTH Permit No.: 68-01 Date: 11/{DJ2015 Time: I 3 7-2... Weather: 60 Client : Draper Aden ----WELL NUMBER: MW105 Well I.Diam: Measurements from TOC Screened interval: Personnel: J. Sherrill, LG ------Total well depth (TD): 37.92 Length of water column: I (p, Dh Total water volume purged: S, D Depth to water (DTW): '2.. \ • 8/P Volume in well (gal): 2. , S
Method Purged: Dedicated Bladder Pump
Method sampled: Dedicated Bladder Pump
Purge Time pH Temp Specific Dissolved ORP
Vol. (G) (C) Cond. ems/cm) Oxygen(%) (mV)
(), 1.. 132> 7, ( () lf3.() o. 2.fll 31,2. -I 3Cx L.f
2..tD l33D t-,0'6 180t:; O I 2( L( ID I q -13& :i
~D 133> -=l,03 l ~D=l-D,Z.fl.f 'L 2.. -135.'-(
St.O I 31.fD 1.02. l8.D~ 0.2.(L-{ g{~ - / 3'f,'8
Remarks on Sampling and Well Condition:
Sample Collection Time: f 3 '15
Turbidity
(NTU)
7-S,'1
3, 2..
I le,
J .~
Sherrill Environmental, Inc. GROUNDWATER SAMPLING FIELD DATA WORKSHEET Project Name: Orange Co. LF -SOUTH Permit No.: 68-01 Date: 11/ /D'2015 Time: I '-/ ll> Weather: 3 Client : Draper Aden ----WELL NUMBER: MW106 Well I.Diam: Measurements from TOC Screened interval: ------Total well depth (TD): 37.64 Length of water column: 20 ,-=t 2 Total water volume purged: 5 tO Personnel: J. Sherrill. LG Depth to water (DTW): / {:,, q L Volume in well (gal): 3, -:S
Method Purged: Dedicated Bladder Pump
Method sampled:_~D=ed=ic=at=e~d =B=la~dd=e~r ~Pu=m-P~-------
Purge Time pH Temp Specific Dissolved ORP
Vol. (G) (C) Cond. (mS/cm) Oxygen(%) (mV)
2,0 I~ 2. S ~.'$1.. /1,,51, Ocotl.; 10,LJ -l2.4:,'-/
3lD l'13D G, ,t.\ \ I~.:}-=?-0 «D i.6 2-<t>.\ -\\{.Z.
t; ,1) ( '135 &Hg lb.~ { O I o'1tf 21 ,(.p -IICj"
S.D 1 '1~0 ,st \,.ab 010tt':r 1...s.~ -\lg,~
Turbidity
(NTU)
LO,L\
Bi;
J 3,t_
l ::,.l3
Remarks on Sampling and Well Condition: ~ -/l / /., rV\..sf-~( ( r~plet..ce ~ed we...\\ heJ . t:ep'\,rC...O"'"f ~.
Sample Collection Time: 1 l\ L.\3:::
Sherrill Environmental, Inc. GROUNDWATER SAMPLING FIELD DATA WORKSHEET Project Name: Orange Co. LF-SOUTH Permit No.: 68-01 Client : Draper Aden WELL NUMBER: MW107 Well I.Diam: Measurements from TOC Screened interval: ------Date: Time: Weather: 111/012015 /~50 Personnel: J. Sherrill, LG Total well depth (TD): 37.29 Length of water column: 2..l, Ip Total water volume purged: S l D Depth to water (DTW): I lo, / 3 Volume in well (gal): 3, 3
Method Purged: Dedicated Bladder Pump
Method sampled: Dedicated Bladder Pump
Purge Time pH Temp Specific Dissolved ORP
Vol. (G) (C) Cond. (mS/cm) Oxygen(%) (mV)
0,1-/ '1$ ~.1+ !S."53 !), D 51 I ~71:,
l'.L ~· --I DB. to
2.,0 l 5 O'D +,3L (~,55 D,D6 / 10, o -lb8. (:,
3~t> r So:s ~lSs lS",5 c !J.OhZ r.L b -109,-=}
'-t.b t51b =I.~ I>.~ I D, oe, 3 'LB -t tr::,,D
5,0 tS 1,; '::I. cu l~,b I /J,Db3 \ 0 t l -( Oh,5
Remarks on Sampling and Well Condition:
Sample Collection Time: I 'S l :J-
Turbidity
(NTU)
2.'tq
Zb.C,
l ~. l( ,q,q
2/,S
ll,5
Sherrill Environmental, Inc. GROUNDWATER SAMPLING FIELD DATA WORKSHEET Project Name: Orange Co. LF -SOUTH Permit No.: 68-01 Client : Draper Aden WELL NUMBER: MWllOS Well I.Diam: Measurements from TOC Screened interval: Date: 111/0/2015 Time: l ;z.5 Weather: _{;;,_lf'------Personnel: J. Sherrill, LG Total well depth (T_D_)_: --3-8-.3-1-Depth to water (DTW): L '2.. • Cf h Length of water column: I "S , !> ~ Volume in well (gal): _'2.._, _L( __ Total water volume purged: s.O
Method Purged: Dedicated Bladder Pump
Method sampled:_--=D=ed=ic=a=te=d-=B=la=d=de=r...:c.P..::::um=:,1::...p _______ _
Purge Time pH Temp Specific Dissolved ORP Turbidity
Vol. (G) (C) Cond. (mS/cm) Oxygen(%) (mV) <NTU)
~ 0.7-15;{) f.CtB I t:;,51 6. D <o~ lf,D. -:::, -6~.'f S,I
\ID 1$35 -=I .C1£ lS,t;C, b,n '60 ?_(p, I.( -Rb,5 11.S
2,l) t S'll> =1.'1 :s 15,Sl D,DB lo 2.t.3 -RI,,£> 't,5
3,D lSLi5 :J,90 1'5.~6 b,08(:, 2':l,D -8'1, ~ !; ,/_
Remarks on Sampling and Well Condition:
Sample Collection Time: I 'S Lf t>
Sherrill Environmental, Inc. GROUNDWATER SAMPLING FIELD DATA WORKSHEET Project Name: Orange Co. LF -SOUTH Permit No.: 68-01 Client : Draper Aden WELL NUMBER: MWllOD Well I.Diam: Measurements from TOC Screened interval: ------Date: Time: Weather: Personnel: 11//0/2015 tSS'Z.. J. Sherrill, LG Total well depth (TD): 70.85 Depth to water (DTW): 2 C, .°! I Length of water column: ~(),°!, :I Volume in well (gal): ____,,,~~' t;;=---Total water volume purged: > • D
Method Purged: Dedicated Bladder Pump
Method sampled: Dedicated Bladder Pump
Purge Time pH Temp Specific Dissolved ORP Turbidity
Vol. (G) (C) Cond. (mS/cm) Oxy~en (%) (mV) (NTU)
6r3 IS~~ '1.°J I 1 S.L-l~ 0, 11 ~ ( z.. z -0~rL/ /83
l, 3 ltoCO 8r 2-'?J \~,43 0, I~=? ~,&P -/22.,) lJ°t.l
21S lhb r; 6,36 15, lf I D,l37-(6,0 -J.YJ ,to 5 L/,2...
LLO / l,l O 8.31 ts. Lf c 0,IL-fD 1,4 -/ 5 5 rb IZ1D
5,0 lG,tS B,3f t S,lfC D, 142.. ~\ l -( 3b. ~ '-{ ,B
Remarks on Sampling and Well Condition:
Sample Collection Time: f (o I -==}-
Sherrill Environmental, Inc. GROUNDWATER SAMPLING FIELD DATA WORKSHEET Project Name: Orange Co. LF -SOUTH Date: Permit No.: 68-01 Time: Client : Draper Aden Weather: WELL NUMBER: MWlll Personnel: 11/lb/2015 Of w S 4 0 vev~~ J. Sherrill, LG Well I.Diam: Measurements .from TOC Screened interval: ------Total well depth (TD): __ -=-38~.4~6~ Length of water column: l I /'ef-\ Total water volume purged: '-I, S Depth to water (DTW): Utfc 7-Volume in well (gal): I , °t
Method Purged: Dedicated Bladder Pump
Method sampled: __ D=-e=d=ic=at=e=-d =B=la=dd=e-=-r "-'Pum=p'----------
Time pH Specific Dissolved ORP
Ox en%
Remarks on Sampling and Well Condition:
Sample Collection Time: f 00 L
Turbidity
TU
Sherrill Environmental, Inc. GROUNDWATER SAMPLING FIELD DATA WORKSHEET Project Name: Orange Co. LF -SOUTH Permit No.: 68-01 Client : Draper Aden WELL NUMBER: MW112 Well I.Diam: Measurements from TOC Screened interval: ------Date: Time: 11/ ,0'2015 12-q-:+ Weather: ___,k?_D_c, __ Personnel: J. Sherrill. LG Total well depth (TD): 38.0 Depth to water (DTW): /-::/, tf Lf Length of water column: 7.bt ~/:, Volume in well (gal): ~3~· Z... __ Total water volume purged: S c O
Method Purged: Dedicated Bladder Pump
Method sampled: __ D=-e=d=ic=at=e=-d =B=la=dd=e=-r :....;Pu=m=p'---------
Purge Time pH Temp Specific Dissolved ORP Turbidity
Vol. (G) (C) Cond. (mS/cm) Oxygen(%) (mV) (NTU)
D.'-f 12..SD 1.3:/ I e,.1, I 0. 7_t.X) St;; 3 -l2L.'6 t S, Z.
LS 12.S~ 1.6' I I l,,5lf D.3~Cz 2-8,0 -l 'fr;,q I Cf ( I
2.,5 t 3.00 1.=11~ '".S+ D,4 2-Lf '1.1--l Lf L[.D ZSJ?
3rD 1305 -:,.~6 lb Sb /) ( '-t ?_C, B/3 -t'f'iS w,a
t,, D I 'sf{) f.f f lb.Sb fL t.t 'f, ~ cg,q -I q L/.:,. l I.C
5,D I 3<5 =Ii (p'1 I b,St.J D,t.tz_q s.s -ltt.5.6 8.~
Remarks on Sampling and Well Condition:
Sample Collection Time: I 3 f "'.:}--
ATTACHMENT 9

STATISTICAL ANALYSES
ATTACHMENT 9

STATISTICAL ANALYSES

The regulations and the Groundwater Monitoring Plan indicate that (after background sampling
and analysis has been completed) each report shall also include:
 the arithmetic mean and variance of background data for each constituent
 the results of statistical analyses

The required statistical analyses are documented in a report previously submitted to the NCDENR -
Solid Waste Section (dated September, 1996). Subsequent groundwater data (including data
obtained during this sampling event) were compared to the facility background values contained in
the September, 1996, report.

In the course of preparing the report for event 25, the facility background concentration (FBAC)
of total arsenic was revised using data derived from upgradient well 6801-MW110D (sampling
event 1 through event 25).

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, except when the calculated facility background concentration is larger than the SWSL (as
is the case for certain metals, which occur naturally in soil and bedrock).

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

Shift in Reporting Limits. A cursory review of the history of organic or inorganic constituents in
groundwater at the facility would suggest that the occurrences of regulated constituents increased
abruptly during the June 14, 2007, sampling event (event 26).

During 2007, NCDENR promulgated Solid Waste Section Limits 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.

The apparent increase in the occurrences of the affected constituents is an artifact of decreased
laboratory reporting limits.

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 II (15A NCAC
13B .1600) that are typically analyzed using EPA Method 8260B.

No target analytes were detected in the trip blank.
Quality Control Information
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.

Quality Control Information
Page 3

2.2 EPA Method 8270D (semi-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.

2.3 EPA Method 8082A (polychlorinated biphenyls)

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 8081B (organo-chlorinated pesticides)

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 Information
Page 4

2.5 EPA Method 8151A (chlorinated herbicides)

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.

2.6 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

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.

2.7 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.

Quality Control Information
Page 5

2.8 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.

2.9 EPA Method 9014 (cyanide)

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.

2.10 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