6801_OrangeCounty_MSWLF_1stSemiGWMReport_DIN27217_20160518

Prepared for:

Prepared for:

Prepared by:

July, 2016
DAA No. R00592-171
ORANGE COUNTY SOLID WASTE MANAGEMENT
(SOUTH FACILITY)
GROUNDWATER MONITORING PROGRAM
PERMIT NUMBER 68-01 (AMENDED)

SAMPLING EVENT 44: 05-18-16 + 05-20-16

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-MW104 7440-38-2 14 Arsenic Total 8.38 ug/L J 1 5/18/2016 5/23/2016 5/24/2016 10 2L
68-01 6801-MW105 7440-38-2 14 Arsenic Total 81.3 ug/L 1 5/18/2016 5/23/2016 5/24/2016 10 2L
68-01 6801-MW110D 7440-38-2 14 Arsenic Total 10.2 ug/L 1 5/18/2016 5/23/2016 5/24/2016 10 2L
68-01 6801-MW101 7440-39-3 15 Barium Total 17.2 ug/L J 1 5/18/2016 5/23/2016 5/24/2016 700 2L
68-01 6801-MW102S 7440-39-3 15 Barium Total 37.4 ug/L J 1 5/18/2016 5/23/2016 5/24/2016 700 2L
68-01 6801-MW103D 7440-39-3 15 Barium Total 2.71 ug/L J 1 5/18/2016 5/23/2016 5/24/2016 700 2L
68-01 6801-MW103S 7440-39-3 15 Barium Total 1.50 ug/L J 1 5/18/2016 5/23/2016 5/24/2016 700 2L
68-01 6801-MW104 7440-39-3 15 Barium Total 1.09 ug/L J 1 5/18/2016 5/23/2016 5/24/2016 700 2L
68-01 6801-MW105 7440-39-3 15 Barium Total 6.19 ug/L J 1 5/18/2016 5/23/2016 5/24/2016 700 2L
68-01 6801-MW106 7440-39-3 15 Barium Total 8.74 ug/L J 1 5/18/2016 5/23/2016 5/24/2016 700 2L
68-01 6801-MW107 7440-39-3 15 Barium Total 5.37 ug/L J 1 5/18/2016 5/23/2016 5/24/2016 700 2L
68-01 6801-MW110S 7440-39-3 15 Barium Total 4.33 ug/L J 1 5/18/2016 5/23/2016 5/24/2016 700 2L
68-01 6801-MW111 7440-39-3 15 Barium Total 4.93 ug/L J 1 5/18/2016 5/23/2016 5/24/2016 700 2L
68-01 6801-MW112 7440-39-3 15 Barium Total 11.7 ug/L J 1 5/18/2016 5/23/2016 5/24/2016 700 2L
68-01 6801-MW111 7440-47-3 51 Chromium Total 2.31 ug/L J 1 5/18/2016 5/23/2016 5/24/2016 10 2L
68-01 6801-MW101 7440-48-4 53 Cobalt Total 3.60 ug/L J 1 5/18/2016 5/23/2016 5/24/2016 1 GWPS
68-01 6801-MW102S 7440-48-4 53 Cobalt Total 2.34 ug/L J 1 5/18/2016 5/23/2016 5/24/2016 1 GWPS
68-01 6801-MW105 7440-48-4 53 Cobalt Total 39.1 ug/L 1 5/18/2016 5/23/2016 5/24/2016 1 GWPS
68-01 6801-MW107 7440-48-4 53 Cobalt Total 1.68 ug/L J 1 5/18/2016 5/23/2016 5/24/2016 1 GWPS
68-01 6801-MW111 7440-48-4 53 Cobalt Total 1.34 ug/L J 1 5/18/2016 5/23/2016 5/24/2016 1 GWPS
68-01 6801-MW112 7440-48-4 53 Cobalt Total 8.27 ug/L J 1 5/18/2016 5/23/2016 5/24/2016 1 GWPS
68-01 6801-MW110S 7439-89-6 340 Iron Total 90.7 ug/L J 1 5/18/2016 5/23/2016 5/24/2016 300 2L
68-01 6801-MW110S 7439-96-5 342 Manganese Total 8.70 ug/L J 1 5/18/2016 5/23/2016 5/24/2016 50 2L
68-01 6801-MW102S 7440-02-0 152 Nickel Total 5.32 ug/L J 1 5/18/2016 5/23/2016 5/24/2016 100 2L
68-01 6801-MW103S 7440-02-0 152 Nickel Total 2.66 ug/L J 1 5/18/2016 5/23/2016 5/24/2016 100 2L
68-01 6801-MW105 7440-02-0 152 Nickel Total 8.74 ug/L J 1 5/18/2016 5/23/2016 5/24/2016 100 2L
68-01 6801-MW107 7440-02-0 152 Nickel Total 2.61 ug/L J 1 5/18/2016 5/23/2016 5/24/2016 100 2L
68-01 6801-MW111 7440-02-0 152 Nickel Total 2.66 ug/L J 1 5/18/2016 5/23/2016 5/24/2016 100 2L
68-01 6801-MW112 7440-02-0 152 Nickel Total 5.70 ug/L J 1 5/18/2016 5/23/2016 5/24/2016 100 2L
68-01 6801-MW103D 7782-49-2 183 Selenium Total 1.08 ug/L J 1 5/18/2016 5/24/2016 5/26/2016 20 2L
68-01 6801-MW111 7440-62-2 209 Vanadium Total 1.99 ug/L J 1 5/18/2016 5/23/2016 5/24/2016 0.3 GWPS
68-01 6801-MW110S SW301 301 Chloride 2400 ug/L J 1 5/18/2016 5/23/2016 5/23/2016 250000 2L
68-01 6801-MW110S 14808-79-8 315 Sulfate as SO4 2900 ug/L J 1 5/18/2016 5/23/2016 5/23/2016 250000 2l
68-01 6801-MW110S SW311 311 Total Dissolved Solids 60000 ug/L 1 5/18/2016 5/24/2016 5/24/2016 500000 2L
68-01 6801-MW110S SW337 337 Total Alkalinity as CaCO3 26000 ug/L 1 5/18/2016 5/25/2016 5/25/2016 N/A N/A
68-01 6801-Leachate 78-93-3 141 2-Butanone 260 ug/L D 10 5/20/2016 5/26/2016 5/26/2016
68-01 6801-Leachate 67-64-1 3 Acetone 240 ug/L D 10 5/20/2016 5/26/2016 5/26/2016
68-01 6801-Leachate 7440-38-2 14 Arsenic Total 26.9 ug/L 1 5/20/2016 5/25/2016 5/26/2016
68-01 6801-Leachate 7440-39-3 15 Barium Total 648 ug/L 1 5/20/2016 5/25/2016 5/26/2016
68-01 6801-Leachate SW316 316 Biochemical Oxygen Demand 47000 ug/L 1 5/20/2016 5/20/2016 5/20/2016
68-01 6801-Leachate SW317 317 Chemical Oxygen Demand 770000 ug/L 1 5/20/2016 5/26/2016 5/27/2016
68-01 6801-Leachate 7440-47-3 51 Chromium Total 21.5 ug/L 1 5/20/2016 5/25/2016 5/26/2016
68-01 6801-Leachate 7440-48-4 53 Cobalt Total 21.9 ug/L 1 5/20/2016 5/25/2016 5/26/2016
68-01 6801-Leachate 7440-50-8 54 Copper Total 2.13 ug/L J 1 5/20/2016 5/25/2016 5/26/2016
68-01 6801-Leachate 7439-92-1 131 Lead Total 3.19 ug/L J 1 5/20/2016 5/25/2016 5/26/2016
68-01 6801-Leachate 7439-96-5 342 Manganese Total 2300 ug/L 1 5/20/2016 5/25/2016 5/26/2016
68-01 6801-Leachate 7440-02-0 152 Nickel Total 52.3 ug/L 1 5/20/2016 5/25/2016 5/26/2016
68-01 6801-Leachate SW303 303 Nitrate as N 250 ug/L J 1 5/20/2016 5/27/2016 5/27/2016
68-01 6801-Leachate NA 419 Nitrate/Nitrite as N 360 ug/L 1 5/20/2016 5/26/2016 5/26/2016
68-01 6801-Leachate SW304 304 Nitrite as N 110 ug/L J 1 5/20/2016 5/20/2016 5/20/2016
68-01 6801-Leachate 7723-14-0 412 Phosphorus 1400 ug/L 1 5/20/2016 5/27/2016 5/31/2016
68-01 6801-Leachate 7782-49-2 183 Selenium Total 17.1 ug/L JD 10 5/20/2016 5/25/2016 5/31/2016
68-01 6801-Leachate 14808-79-8 315 Sulfate as SO4 24000 ug/L J 1 5/20/2016 5/25/2016 5/25/2016
68-01 6801-Leachate 7440-62-2 209 Vanadium Total 21.1 ug/L J 1 5/20/2016 5/25/2016 5/26/2016
68-01 6801-Leachate 7440-66-6 213 Zinc Total 37.2 ug/L 1 5/20/2016 5/25/2016 5/26/2016
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 DemonstrationFBAC - 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.
updated: 07-20-16
Natural attenuation indicator; present at upgradient location
Naturally occurring; present at upgradient location
Natural attenuation indicator; present at upgradient location
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 03-30-11
Naturally occurring; does not exceed SWSL; present at upgradient location
metals (total - not filtered)
Naturally occurring; does not exceed SWSL; present at upgradient location
Naturally occurring; does not exceed SWSL; ASD approved 03-30-11
Naturally occurring; does not exceed SWSL
Naturally occurring; does not exceed SWSL
additional constituents
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: 05/18/16 + 05/20/16
Naturally occurring; does not exceed SWSL
Possible landfill impact; naturally occurring; concentration less than FBAC (447 ug/l); present at upgradient location
Natural attenuation indicator; present at upgradient location
leachate monitoring data
Naturally occurring; does not exceed SWSL
Naturally occurring; does not exceed SWSL; present at upgradient location
Naturally occurring; does not exceed SWSL
Naturally occurring; does not exceed SWSL
Naturally occurring; does not exceed SWSL; ASD approved 03-30-11
Naturally occurring; does not exceed SWSL
Naturally occurring; does not exceed SWSL
Naturally occurring; does not exceed SWSL; ASD approved 05-26-10
Naturally occurring; ASD approved 03-30-11; concentration less than FBAC (43 ug/l)
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
Naturally occurring; does not exceed SWSL
Naturally occurring; does not exceed SWSL
Naturally occurring; does not exceed SWSL
Naturally occurring; does not exceed SWSL
CONSTITUENTS ATTAINING OR EXCEEDING THEIR GROUNDWATER QUALITY STANDARDS
ANALYSIS*
Possible landfill impact; naturally occurring; concentration less than FBAC (447 ug/l)
Possible landfill impact; naturally occurring; concentration less than FBAC (447 ug/l)
Naturally occurring; does not exceed SWSL
J - constituent was less than its Solid Waste Section Limit (SWSL)

ATTACHMENTS

1 FIGURES

2 MONITORING WELL NETWORK

3 GROUNDWATER ELEVATION DATA

4 GROUNDWATER VELOCITY CALCULATIONS

5 ORGANIC CONSTITUENTS

6 INORGANIC CONSTITUENTS

7 LABORATORY CERTIFICATE-OF-ANALYSIS

8 FIELD DATA

9 STATISTICAL ANALYSES

10 QUALITY CONTROL ASSESSMENT

11 CORRESPONDENCE
ATTACHMENT 1

FIGURES

LEGEND

N

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

DAA NO.
[not shown]

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

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

LEGEND

N

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

DAA NO.
[not shown]

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

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

MONITORING WELL NETWORK

ATTACHMENT 2

GROUNDWATER MONITORING NETWORK

The well monitoring network associated with the 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 521.29 feet above mean sea
level (upgradient monitoring well 6801-MW110S) to a low of 479.53 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: 05-18-16
WELL ELEVmp DTW STICKUP DTWc ELEVgs ELEVgw
6801-MW101 509.25 15.90 2.27 13.63 506.98 493.35
6801-MW102 DR 498.03 8.52 2.50 6.02 497.62 489.51
6801-MW102 S 497.30 7.83 2.24 5.59 495.06 489.47
6801-MW103 D 498.54 12.74 2.54 10.20 496.00 485.80
6801-MW103 S 497.57 12.14 2.29 9.85 495.28 485.43
6801-MW104 494.91 15.38 2.19 13.19 492.72 479.53
6801-MW105 508.64 20.72 2.84 17.88 505.80 487.92
6801-MW106 509.53 15.74 2.31 13.43 507.22 493.79
6801-MW107 516.46 13.65 2.10 11.55 514.36 502.81
6801-MW108 532.74 2.38 530.36
6801-MW109 523.93 2.35 521.58
6801-MW110 D 540.18 26.20 2.30 23.90 537.88 513.98
6801-MW110 S 540.24 18.95 2.33 16.62 537.91 521.29
6801-MW111 524.31 25.95 2.21 23.74 522.10 498.36
6801-MW112 503.72 16.18 3.00 13.18 500.72 487.54
NOTES:
Upgradient wells shaded yellow.
Elevations expressed in feet above mean sea level.
R00592-171
DATE MW-101 MW-102 D MW-102 DR MW-102 S MW-103 D MW-103 S MW-104 MW-105 MW-106 MW-107 MW-108 MW-109 MW-110 D MW-110 S 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
05/18/16 493.35 489.51 489.47 485.80 485.43 479.53 487.92 493.79 502.81 513.98 521.29 498.36 487.54
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 487.12 485.76 486.28 484.58 483.60 482.81 477.85 484.85 488.95 496.54 506.17 513.02 509.57 516.41 496.01 484.67
MEAN 487.99 485.74 486.55 485.22 483.66 482.92 477.97 484.89 489.15 496.29 506.80 513.83 509.40 516.35 496.14 484.87
MAX 497.90 491.46 491.68 492.77 486.44 485.70 479.87 490.39 494.63 502.81 522.27 521.93 515.28 522.77 501.09 487.54
STD 3.64 3.47 2.64 3.41 1.28 1.47 0.96 1.92 2.23 3.16 6.02 4.61 2.84 3.02 1.70 1.57
RANGE 16.21 11.85 10.49 13.88 6.11 6.25 4.01 10.74 9.90 12.57 22.33 16.69 13.80 12.64 7.99 5.16
R00592-171
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
LOCATION: CHAPEL HILL, NORTH CAROLINA
Elevation in feet above sea level.
FACILITY: SOUTH FACILITY
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF STATIC WATER ELEVATIONS
Upgradient wells shaded yellow.
475
480
485
490
495
500
505
510
515
520
525
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Date
Orange County Solid Waste Management -South Facility
static water elevations
MW-101 MW-102 D MW-103 D MW-103 S MW-104 MW-105 MW-106
MW-107 MW-108 MW-109 MW-110 D MW-110 S MW-111 MW-102 DR
500
505
510
515
520
525
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Date
Orange County Solid Waste Management -South Facility
static water elevations
MW-110 S MW-110 D
direction of
vertical
gradient
495
500
505
510
515
520
525
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Date
Orange County Solid Waste Management -South Facility
static water elevations
MW-108 MW-109 MW-110 S
wells at upgradient (west) end of landfill
475
480
485
490
495
500
505
510
515
520
525
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Orange County Solid Waste Management -South Facility
static water elevations
MW-110 S MW-101 MW-102 S
wells along north side of landfill
475
480
485
490
495
500
505
510
515
520
525
st
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Orange County Solid Waste Management -South Facility
static water elevations
MW-108 MW-107 MW-106 MW-105 MW-103 S 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 the groundwater velocity observed during the subject sampling event (275.6
feet per year) with those observed during prior sampling events (see table) indicates that the
velocity observed during the subject sampling event is approximately 10.5% greater than the
median velocity (249.5 feet per year) (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 around a velocity of
approximately 260 feet per year (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
05/18/16 6801-MW110s 521.29 6801-MW104 479.53 2.22E-02 84.0 275.6
distance = 1,881 feet median = 76.0 249.5
hydraulic conductivity = 1.8 E-5 meters/second deviation from mean = 10.5%
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
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y
e
a
r
date measured
OCSWM South Landfill: groundwater velocity
median
ATTACHMENT 5

SUMMARY OF ORGANIC CONSTITUENTS

ATTACHMENT 5

ORGANIC CONSTITUENTS

On May 18, and May 20, 2016 (sampling event 44), Sherrill Environmental personnel obtained
groundwater samples from fourteen groundwater monitoring wells and one leachate collection
system location at the Orange County Solid Waste Management South Facility (south side of
Eubanks Road).

During the May, 2016, 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).

Maximum concentrations of volatile organic constituents in well 6801-MW105 were
observed during 2012, after which concentrations began decreasing.

By May, 2014, the laboratory no longer detected any volatile organic constituents in well
6801-MW105.

In response to the initial occurrences of volatile organic constituents in well 6801-MW105,
OCSWM constructed well 6801-MW112 at a location that is approximately 190 feet
downgradient of well 6801-MW105.

Organic Constituents
Page 2

The laboratory has detected only trace levels (always less than 1 ppb) of several volatile
organic constituents in well 6801-MW112.

By May, 2013, the laboratory no longer detected any volatile organic constituents in well
6801-MW112.
SUMMARY OF ORGANIC CONSTITUENTS

GRAPHS

06/07/12, 1.1
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 1/2 RL MCL = 5 ppb
2L standard = 1.0 ppb / SWSL = 1.0 ppb
05/25/11, 0.97 06/07/12, 0.95
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
2L standard = 6.0 ppb / SWSL = 5.0 ppb
06/07/12, 2.4
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
2L standard = 70 ppb / SWSL = 5 ppb
06/07/12, 1.3
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
co
n
c
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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
2L standard = 0.03 ppb / SWSL = 1.0 ppb
SUMMARY OF ORGANIC CONSTITUENTS

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
05/18/16 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
MW-105 LOD SWSL QA/QC
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
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
05/18/16 <1.2 <1.2 <1.2 <1.2 <1.2 1.2 100
MW110S
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
MW-110D MW-111ConstituentSample Date
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
LOD SWSL QA/QCMW-112MW-106 MW-107 MW-108
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
05/18/16 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 1
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
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
QA/QCMW-103S
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
05/18/16 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 1
MW110S
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
QA/QCMW-112MW-111 LOD SWSLConstituentSample Date MW-106 MW-107 MW-108 MW-110D
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
05/18/16 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
Constituent Sample Date MW-101 MW-102S MW-102D MW-102 DR
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
MW-103S QA/QCMW-103D MW-104 MW-105 LOD SWSL
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
05/18/16 <1.5 <1.5 <1.5 <1.5 <1.5 1.5 100
MW110S
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
Constituent Sample Date MW-106 MW-107 MW-108 MW-112MW-110D MW-111 LOD SWSL QA/QC
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
05/18/16 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 3
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
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-104 MW-105 LOD SWSL QA/QCMW-103S
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
05/18/16 <0.17 <0.17 <0.17 <0.17 <0.17 0.17 3
MW110S SWSL QA/QC
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
LODMW-112MW-106 MW-107 MW-108 MW-110D MW-111ConstituentSample Date
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
05/18/16 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 0.23 10
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
Sample Date MW-101 MW-102S MW-102D MW-102 DR
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
MW-103S QA/QCMW-103D MW-104 MW-105 LOD SWSLConstituent
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
05/18/16 <0.23 <0.23 <0.23 <0.23 <0.23 0.23 10
MW110S
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
MW-110D MW-111 LOD SWSL QA/QCConstituentSample Date MW-106 MW-107 MW-108 MW-112
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
05/18/16 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 0.13 1
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-104MW-103S MW-105 LOD SWSL QA/QC
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
05/18/16 <0.13 <0.13 <0.13 <0.13 <0.13 0.13 1
MW110S MW-111
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 LOD SWSL QA/QCMW-112MW-106 MW-107 MW-108 MW-110D
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
05/18/16 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 0.13 5
ORGANIC CONSTITUENTS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
MW-103SSample Date MW-101 MW-102S MW-102D MW-102 DR MW-103D MW-104 MW-105 LOD SWSL QA/QC
LOCATION: CHAPEL HILL, NORTH CAROLINA
Constituent
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
05/18/16 <0.13 <0.13 <0.13 <0.13 <0.13 0.13 5
MW-112
ORGANIC CONSTITUENTS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
QA/QCMW110S LOD SWSLMW-106 MW-107 MW-108 MW-110D MW-111ConstituentSample Date
LOCATION: CHAPEL HILL, NORTH CAROLINA
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
05/18/16 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 5
Constituent Sample Date MW-101 MW-102S MW-102D MW-102 DR QA/QC
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-103S
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
05/18/16 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 5
MW110S LOD SWSLMW-111 QA/QCConstituentSample Date MW-106 MW-107 MW-108 MW-112
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
MW-110D
FACILITY: SOUTH FACILITY
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
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
05/18/16 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 5
MW-103S
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
LOCATION: CHAPEL HILL, NORTH CAROLINA
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
MW-105 LOD SWSL QA/QCConstituentSample Date MW-101 MW-102S MW-102D MW-102 DR MW-103D MW-104
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
05/18/16 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 5
MW110S
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
MW-110D MW-111
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
LOD SWSL QA/QCMW-112ConstituentSample Date MW-106 MW-107 MW-108
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
05/18/16 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 1
MW-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 QA/QC
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
05/18/16 <0.19 <0.19 <0.19 <0.19 <0.19 0.19 1
MW110S MW-112
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
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
MW-106 MW-107 MW-108ConstituentSample Date
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
05/18/16 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 1
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
MW-103D MW-104 MW-105 LOD SWSLConstituentSample Date MW-101 MW-102S MW-102D MW-102 DR MW-103S QA/QC
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
05/18/16 <0.14 <0.14 <0.14 <0.14 <0.14 0.14 1
MW-112
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
MW-110D MW-111 LOD SWSL QA/QCConstituentSample Date MW-106 MW-107 MW-108 MW110S
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
05/18/16 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 1
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
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 MW-105 LOD SWSL QA/QC
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
05/18/16 <0.15 <0.15 <0.15 <0.15 <0.15 0.15 1
MW-112
PROJECT: GROUNDWATER MONITORING PROGRAM
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
LOD SWSL QA/QCMW110S MW-106 MW-107 MW-108 MW-110D MW-111ConstituentSample Date
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
05/18/16 <0.32 <0.32 <0.32 <0.32 <0.32 <0.32 <0.32 0.32 1
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
QA/QCMW-103D MW-104 MW-105 LOD SWSLConstituentSample Date MW-101 MW-102S MW-102D MW-102 DR MW-103S
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
05/18/16 <0.33 <0.32 <0.32 <0.32 <0.32 0.32 1
MW-112
CLIENT: ORANGE COUNTY SOLID WASTE MANAGEMENT
HISTORY OF CHEMICAL ANALYSIS
ORGANIC CONSTITUENTS
FACILITY: SOUTH FACILITY
LOCATION: CHAPEL HILL, NORTH CAROLINA
PROJECT: GROUNDWATER MONITORING PROGRAM
LOD SWSL QA/QCConstituentSample Date MW-106 MW-107 MW-108 MW110S MW-110D MW-111
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
R00592-171
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

On May 18, and May 20, 2016 (sampling event 44), Sherrill Environmental personnel obtained
groundwater samples from fourteen groundwater monitoring wells and one leachate collection
system location at the Orange County Solid Waste Management South Facility (south side of
Eubanks Road).

 During May, 2016, the laboratory detected nine metals, and was able to quantify the
concentrations (>MDL): arsenic, barium, chromium, cobalt, iron, manganese (C&D
parameter), nickel, selenium, 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 nine inorganic constituents detected, two inorganic constituents exceeded their
respective Solid Waste Section Limits (>SWSLs), but were less than their respective
Facility Background Concentrations (>SWSLs and <Statistical Prediction Limit; SPL, as
calculated):
 arsenic - well 6801-MW-105 = 81.3 µg/l (< SPL = 447 µg/l)
 arsenic - well 6801-MW110D = 10.2 µg/l (< SPL = 447 µg/l)
 cobalt - well 6801-MW105 = 39.1 µg/l (< SPL = 43 µg/l)

Cobalt. 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 NCDEQ to OCSWM
(dated March 30, 2011), NCDEQ approved the Alternate Source Demonstration.

 During the May, 2016, the laboratory detected four additional parameters, at
concentrations greater than their respective method detection limits (>MDLs): alkalinity
(total), chloride, total dissolved solids, sulfate.

Of the four additional parameters detected, two exceeded their respective Solid Waste
Section Limits (>SWSLs):
 alkalinity (no SWSL; exceeds its Method Reporting Level = MRL)
 total dissolved solids (no SWSL; exceeds MRL)

SUMMARY OF INORGANIC CONSTITUENTS

GRAPHS

11/14/01, 447
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
05/01/09, 80.4
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
SUMMARY OF INORGANIC CONSTITUENTS

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
05/18/16 <0.220 <0.220 <0.220 <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
05/18/16 <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
05/18/16 <6.80 <6.80 <6.80 <6.80 <6.80 8.38 J 81.3 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
05/18/16 <6.80 <6.80 10.2 <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
05/18/16 17.2 J 37.4 J <1.00 2.71 J 1.50 J 1.09 J 6.19 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
05/18/16 8.74 J 5.37 J 4.33 J 4.93 J 11.7 J 1.00 100
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
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
05/18/16 <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
05/18/16 <0.100 <0.100 <0.100 <0.100 <0.100 0.100 1
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
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
05/18/16 <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
05/18/16 <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
05/18/16 <1.40 <1.40 <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
05/18/16 <1.40 <1.40 <1.40 2.31 J <1.40 1.40 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
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
05/18/16 3.60 J 2.34 J <1.10 <1.10 <1.10 <1.10 39.1 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
05/18/16 <1.10 1.68 J <1.10 1.34 J 8.27 J 1.10 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
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
05/18/16 <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
05/18/16 <1.60 <1.60 <1.60 <1.60 <1.60 1.60 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
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
05/18/16 <3.10 <3.10 <3.10 <3.10 <3.10 <3.10 <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
05/18/16 <3.10 <3.10 <3.10 <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
05/18/16 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
05/18/16 <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
05/18/16 <2.20 5.32 J <2.20 <2.20 2.66 J <2.20 8.74 J 2.20 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
05/18/16 <2.20 2.61 J <2.20 2.66 J 5.70 J 2.20 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
05/18/16 <0.910 <0.910 <0.910 1.08 J <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
05/18/16 <0.910 <0.910 <0.910 <0.910 <0.910 0.910 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
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
05/18/16 <1.90 <1.90 <1.90 <1.90 <1.90 <1.90 <1.90 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
05/18/16 <1.90 <1.90 <1.90 <1.90 <1.90 1.90 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
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
05/18/16 <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
05/18/16 <0.110 <0.110 <0.110 <0.110 <0.110 0.110 5.5
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
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
05/18/16
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
05/18/16
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
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
05/18/16 <1.40 <1.40 <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
05/18/16 <1.40 <1.40 <1.40 1.99 J <1.40 1.40 25
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
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
05/18/16 <4.40 <4.40 <4.40 <4.40 <4.40 <4.40 <4.40 4.40 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
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
05/18/16 <4.40 <4.40 <4.40 <4.40 <4.40 4.40 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
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
44HistInorgSOUTH 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

On May 18, and May 20, 2016 (sampling event 44), Sherrill Environmental personnel obtained
groundwater samples from thirteen groundwater monitoring wells and one leachate collection
system location 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 twelve compliance wells (6801-MW101, 6801-MW102S, 6801-
MW102DR, 6801-MW103S, 6801-MW103D, 6801-MW104, 6801-MW105, 6801-
MW106, 6801-MW107, 6801-MW110S, 6801-MW111, 6801-MW112) were analyzed for
the constituents listed in Appendix I
 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

Sherrill personnel did not sample well 6801-MW109 because it is used only as a piezometer to
monitor static water elevations.

Sherrill personnel did not sample well 6801-MW108 because NCDEQ 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 (NCDEQ - 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 May 18, 2016, 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-MW110D, 6801-MW110S.

On May 20, 2016, 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.

Sherrill personnel delivered all samples obtained during event 44 to ENCO on May 19, and May 20,
2016.
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.
_J Sherrill Environmental, Inc. GROUNDWATER SAMPLING FIELD DATA WORKSHEET Project Name: Orange Co. LF -SOUTH Permit No.: 68-01 Client : Draper Aden WELL NUMBER: MW101 Date: Time: Weather: Personnel: 05/1 fi2016 ID 2.. J 6, 0 o v<'£C.'1. -;r J. Sherrill, LG Lee Cloer-Orange Co. Well I.Diam: Measurements from TOC Screened interval: ------Total well depth (TD): 38.33 Depth to water (DTW): I 5,'10 Length of water column: Z Z , 'l}
Total water volume purged: :{ , D
Volume in well (gal): _...3~'..:..5 __ _
Method Purged:_-----'D=ed=ic=a=te=d'-"'B=la=d=d=er'-"P'-..:um=p'----------
Method sampled:_--=-D--"-ed=i=ca=te=d:....=B=l=ad=d=er"-'P"-'um=p'-----------
Purge Time pH Temp Specific Dissolved ORP
Vol. (G) (C) Cond. (mS/cm) Oxy12;en(%) (mV)
l.D 10~0 ':1. a '2. I ~c'izS 0,4-=1":l toS. 'Z. C::°t. 2-
'2., "5 1035 1.02. l(tt4 O,'tSl, b't. 4 +D. l
l\,D IOLfO i,{)D IS. 'tL, DI 'i-=lD t;c, r ':/ :r=1.o
Remarks on Sampling and Well Condition:
Sample Collection Time: I O L.f'5
Turbidity
(NTU)
t. z...
Ddo
/,Lf
\\ 30
Sherrill Environmental, Inc. GROUNDWATER SAMPLING FIELD DATA WORKSHEET Project Name: Orange Co. LF -SOUTH Permit No.: 68-01 Client : Draper Aden WELL NUMBER: MW102S Date: Time: Weather: Personnel: 05!18!2016 ll 7.':\ J. Sherrill, LG Lee Cloer-Orange Co. Well I.Diam: Measurements from TOC Screened interval: ------Total well depth (TD): 27.79 Depth to water (DTW): T, 83 Length of water column: / °!,°!{:, Volume in well (gal): _ _cs_,_/___,7_ Total water volume purged: 'Sr 0
Method Purged: Dedicated Bladder Pump
Method sampled:_~D~ed~ic~a~te~d_B~la~dd~e_r _Pum"--------Op,---______ _
Purge Time pH Temp Specific Dissolved ORP Turbidity
Vol. (G) (C) Cond. (mS/cm) Oxygen(%) (mV) (NTU)
t. s 113~ b.'D I S"r32.. D, z.qc; ID,S /02..,+ ~,s
:><D ' \ c..\C> for 2-3 's;,3 ( bt 30C, 'i,D ~~.=1-1...,~
s.o l \ 't5 (e,, 2:5 r-s,32 6, sOI \. ~ B 1,5 1.4
Remarks on Sampling and Well Condition:
Sample Collection Time: f I > b
\ .o 1\00 1-. C1-f I "f,,qC, 0,~'1b °l l t.t l ID,~ 1, l.f
z.o "os ':1-, ID I\ S"S o, s<i7-5. ' °' ':l. G:, 3,3
3.0 I I J l) 1.to 1$.hS o. s sq 3 '(, q l:., lf 1. '"f
'-1, D 'ttS 71.~ I S,b Z. 0, 3 <36 S.D &J'-1.f J.Lf
'Seo \l2.0 1,D'i (t;,b'1 D, 3 Sl, L[' L 12.., I 0,8
.
Remarks on Sampling and Well Condition:
Sample Collection Time: 1-t 'L 5
Sherrill Environmental, Inc. GROUNDWATER SAMPLING FIELD DATA WORKSHEET Project Name: Orange Co. LF -SOUTH Permit No.: 68-01 Client : Draper Aden WELL NUMBER: MW102DR Date: Time: Weather: 051tPr2016 ID Sz... Personnel: J. Sherrill, LG Lee Cloer-Orange Co. Well I.Diam: Measurements from TOC Screened interval: ------Total well depth (TD): 57.5 Depth to water (DTW): S, 52-Length of water column: l1 B,°/8 Volume in well (gal): _f~. s=-----
Total water volume purged: 5, D
Method Purged: Dedicated Bladder Pump
Method sampled: __ D~ed=ic=a=te=d~B=la~d=de=r~P=um=-p _______ _
Purge Time pH Temp Specific Dissolved ORP Turbidity
Vol. (G) (C) Cond. (mS/cm) Oxygen(%) (mV) (NTU)
0. 1-1055 (p,-=1? l>Jf:/ D, 3~8 2'?>.3 l 38, 'I 3.8 \ .o 1\00 1-.~ '"5,Lfi (). "'!:,'1b °t l t.t \ ID,~ i,L(
'-· 0 "os ":1-. IC> 11", ;~ o,s'1c s.' °' ":\, ~ 3,3
3.0 I I 1 l) i,tO It;. h5 b. s BC, 3,(p q ,. lf 1. 'i
L\.D \ t ls ':I. D'1 I S,bZ. O, s '3b 5.D t:tt.t.l I.Lf
"Seo \l2.D 1,D'i (S,b't D, 3 8l, L./' 2.. 11.,, 0,8
Remarks on Sampling and Well Condition:
Sample Collection Time: 1-) 'L 5
Sample Collection Time: 1 L 5 '1
Sherrill Environmental, Inc. GROUNDWATER SAMPLING FIELD DATA WORKSHEET Project Name: Orange Co. LF -SOUTH Permit No.: 68-01 Client : Draper Aden WELL NUMBER: MW103S Date: Time: Weather: 05/19'2016 f7...3B Personnel: J. Sherrill, LG Lee Cloer-Orange Co. Well I.Diam: Measurements from TOC Screened interval: _____ _ Total well depth (TD): 37.98 Length of water column: 2 5.8t-/
Total water volume purged: 5 • D
Depth to water (DTW): i '2., f ~ Volume in well (gal): L/, I
Method Purged: Dedicated Bladder Pump
Method sampled:_~D~ed=i=ca=te.c...ad~B=l=ad=d=e~r P~u=m-p ___________ _
Purge Time pH Temp Specific Dissolved ORP
Vol. (G) (C) Cond. (mS/cm) Oxygen(%) (mV)
2,0 J 2.llS {:, .r;'/ I S.1)2 tJ. z.Br 23, I ~,,
3,5 12so IPSO lt;,O~ 0, 'Z.'i 1 ct.o 82, b
~,o I ZSS ,,stt ,s;.,s /) 3D~ S,°J ~2,6
Remarks on Sampling and Well Condition:
Sample Collection Time: f 2.. 51
Turbidity
(NTU)
3 (-=,
1. .ll s, '-/
-~------,. _ _l.__ ____ _ Sherrill Environmental, Inc. GROUNDWATER SAMPLING FIELD DATA WORKSHEET Project Name: Orange Co. LF -SOUTH Permit No.: 68-01 Client : Draper Aden WELL NUMBER: MW103D Well I.Diam: Measurements from TOC Screened interval: ------Date: 05/J8;2016 Time: -(z,ll' 13 OZ Weather: ~(c£) __ 0 __ _ Personnel: J. Sherrill. LG Lee Cloer-Orange Co. Total well depth (TD): 68.51 Length of water column: 5 5, :/
Total water volume purged: J../, 5
Depth to water (DTW): / 2, 1 LJ Volume in well (gal): --~-·-4~-
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)
o,s I "3LJ> l,.13 I t;,B) 0 I ;bfo ?..t-1. °' c&), 3 s, f
-z., ·5 l31D To,,-b 15",86 O. S53 b, lo -=, lo I'-( I, '-I
3,"5 131"5, "· Is, C, t5.'1D 0, ~_t;!) I.,. 3 :J ~. 3 "~ l-[. i; l32D t,/lb ,s.l1c 0,S~o 2., B -=, "· J I , '-/
Remarks on Sampling and Well Condition:
Sample Collection Time: I S t_ )
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: 05//f$2016 Time: /2.DZ Weather: ~D ---"'-----Personnel: J. Sherrill. LG Lee Cloer-Orange Co. Total well depth (TD): 38.14 Depth to water (DTW): IS 38 Length of water column: 2...2..} h Volume in well (gal): ___.3~, /o=---
Total water volume purged: 6, , 0
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)
1,5 \ '2.10 /p,3~ I t-f.=f/ 0, "'2..15 Lf. ~ °ID.4 l4°t
3,.0 l2t~ {p;:J9 l '1,':/l 0.2~5 l , l, Si:>,7 / t.{D
L{ ( C) I "2..'ZD t,,8t I '-//I~ () ,1.. =l-" " \ '1~. I 1..2.,D
5,D f 2..2S t,.84 / 'I, i~ bt1..~t. l. ~ '-/'I, -:, It, Z.
It,. D r 2.30 "· 8~ ll-f, ~~I /), 2.. ~ l z.~ '11.l) (p,,
Remarks on Sampling and Well Condition:
Sample Collection Time: f 'l. 3 3
r3SB
Sherrill Environmental, Inc. GROUNDWATER SAMPLING FIELD DATA WORKSHEET Project Name: Orange Co. LF -SOUTH Permit No.: 68-01 Client : Draper Aden WELL NUMBER: MW105 Date: Time: Weather: os1tet2016 13'55 Personnel: J. Sherrill, LG Lee Cloer-Orange Co. Well I.Diam: Measurements from TOC Screened interval: ------Total well depth (TD): 37.92 Length of water column: ZD, ~Pt
Total water volume purged: 3 ,5
Depth to water {DTW): ZO, 1 (_ Volume in well (gal): 3, >
Method Purged:_~D~e~d=ic=at=e~d=B=la=dd=e~r~P=um-p,.__ ______ _
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) o,:s I t/(1) t,l'-1 I fs,Cf1 0,/7=/-9,0 6~.~ 2. -=,, 8
L5 t'lo5 IP. 2.s /'bl}g ~. r=t-lf 2., {.p 5S.-=1 I 'I, D
2,S 1 "{(D {,,z.~ 18.bi D, I ,.5 2,3 5 '1,-=, '1,lf
3,S l if Is (o,2. 5 18.o=l (J, l-=fb I, 9 52,5 bJ
Remarks on Sampling and Well Condition:
Sample Collection Time: 14 18
1t12i
Sherrill Environmental, Inc. GROUNDWATER SAMPLING FIELD DATA WORKSHEET Project Name: Orange Co. LF -SOUTH Permit No.: 68-01 Client : Draper Aden WELL NUMBER: MW106 Date: Time: Weather: Personnel: 05//02016 1114 J. Sherrill, LG Lee Cloer-Orange Co. Well I.Diam: Measurements from TOC Screened interval: ------Total well depth (TD): 37.64 Length of water column: 2 \ , °/
Total water volume purged: 3 ,5
Depth to water (DTW): / 5, -=/4 Volume in well (gal): 3, 'S
Method Purged: Dedicated Bladder Pump
Method sampled:_--=D...=c..ed=i=ca=te=d'-"B=l=ad=d=er:.....;P:.....;um=p~--------
Purge Time pH Temp Specific Dissolved ORP
Vol. (G) (C) Cond. (mS/cm) Oxygen(%) (mV)
/. s l'13D r;,72. 1~qD {). D =/8 -=,, 3 lf~,S
Z,S 1~35 S".~s IS. 34 D, 61 C, 1,3 I ( 8. 8
3,s; f'-fl/0 5,~Lf I>, 3(:, D, lJ ~ B '1, 7 I Zf, ~
Remarks on Sampling and Well Condition:
Sample Collection Time: f '-f 'f Z.
Turbidity
(NTU)
8,b
-=t '2-
-:, I I
1-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: 05!1'8'2016 Time: /~~?-Weather: _t:,~0 ___ _ Personnel: J. Sherrill. LG Lee Cloer-Orange Co. Total well depth (TD): 37.29 Depth to water (DTW): t 3,bS "s, q& Length of water column: ·2-3, '14 Volume in well (gal):
Total water volume purged: 5,0
Method Purged: Dedicated Bladder Pump
Method sampled: Dedicated Bladder Pump
Purge Time pH Temp Specific Dissolved ORP Turbidity
Vol. (G) (C) Cond. (mS/cm) Oxygen(%) (mV) (NTU)
'2-, (') I 'f 5S S,91 ,~,28 0, D 51 (p G,. 7-I 2.'3. I It./,(
3,S tSOO S,g) IS, 1'1 D, 0 SI '-{0,. D I '2.0. Lf °'' L/ 5,c) I ~O $ .S:~3 I S.3 I D. o S 2. L-i S. D , , b,~ 'a/-{
Remarks on Sampling and Well Condition:
Sample Collection Time: \ S D'6
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 TDC Screened interval: ------Date: Time: Weather: Personnel: 05//e/2016 I S1-f 1.f J. Sherrill. LG Lee Cloer-Orange Co. Total well depth (TD): 38.31 Depth to water {DTW): ~ l ~.9 5 Length of water column: I °I, 3b Volume in well (gal): _S~._D __
Total water volume purged: Z, S
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)
o.~ /5-SO l, .13 IS,2.~ O.Drob scat l, q3.q ~. t.f
" "S IS 1;>°S br \":l 15.30 D.D8h {p \' 0 cit, 3 3,q
~,D l loDD (p.lt, ''S.3J D, t) 8~ 'St.i, D °lO. I 3.~
;2,5 I lot>'J lPr(~ 1~.3~ O, o8G:, 53.S si~G 3, '1
Remarks on Sampling and Well Condition:
Sample Collection Time: f fo I U
Sherrill Environmental, Inc. GROUNDWATER SAMPLING FIELD DATA WORKSHEET Project Name: Orange Co. LF -SOUTH Permit No.: 68-01 Client: Draper Aden WELL NUMBER: MWllOD Date: Time: Weather: 05/!8'2016 IS (5 Personnel: J. Sherrill. LG Lee Cloer-Orange Co. Well I.Diam: Measurements from TOC Screened interval: ------Total well depth (TD): 70.85 Length of water column: 4 "f , /, :S
Total water volume purged: 5 ,0
Depth to water (DTW): 2.Ct:,, 'L D Volume in well (gal): -=I-, f
Method Purged: Dedicated Bladder Pump
Method sampled:_~D~ed=ic~a=te~d_B~la~d=de~r~P_u_m_p _______ _
Purge Time pH Temp Specific Dissolved ORP
Vol. (G) (C) Cond. (mS/cm) Oxygen(%) (mV)
2,0 L5 2_; ".Lit ,~.;{) D, t z.[P 2. r l 2. l/, £>
3rD IS3D /o,'I~ IS,3/ {),/32. I • i_ , Db. I
'i .() 1535 '153 f >.3/ /), I 3 .> I . I c;s,,
s rD lSlfD b 'Eli (>,l) o, 13 e I. 7 87;,:)
Remarks on Sampling and Well Condition:
Sample Collection Time: I
Turbidity
(NTU)
Co 1-, B
':I~' 4 , . .,. I:,
t,.B
Sherrill Environmental, Inc. GROUNDWATER SAMPLING FIELD DATA WORKSHEET Project Name: Orange Co. LF -SOUTH Permit No.: 68-01 Client : Draper Aden WELL NUMBER: . MWlll Well I.Diam: Measurements from TOC Screened interval: Date: 05//B;2016 aco Time: _1=2 Weather: 60 Ollf',/(_((Jt Personnel: J. Sherrill, LG Lee Cloer-Orange Co. ------Total well depth (TD): 38.46 Depth to water (DTW): 'Z'S, C/5 Length of water column: , 1-, s / Volume in well (gal): --=Z_;_,_;:;o __
Total water volume purged: 2. , 2..
Method Purged: Dedicated Bladder Pump
Method sampled:_---=D=ed=i=ca=te=d"-"B=l=ad=d=er~P,,__,um=p,<....._ _______ _
Purge Time pH Temp Specific Dissolved ORP Turbidity
Vol. (G) (C) Cond. (mS/cm) Oxygen(%) (mV) (NTU)
D.5 ~~> "-~ / 6.2J O.cr'n ~=t. , IOf,. I -=,. b
1, 5 IOCD ~-~1 l lo,21. ()., {00 5'2., 5 lOG .9 2r'?
LtL (Oo<; (o,~t ( fp.-zB D, I J 5 l( 2. °1 IDS.=/ I I ,LI
Remarks on Sampling and Well Condition:
Sample Collection Time: I O I D
Sherrill Environmental, Inc. GROUNDWATER SAMPLING FIELD DATA WORKSHEET Project Name: Orange Co. LF -SOUTH Permit No.: 68-01 Client : Draper Aden WELL NUMBER: MW112 Date: 05//B/2016 Time: / 3 2. <2> Weather: Personnel: J. Sherrill, LG Lee Cloer-Orange Co. Well I.Diam: Measurements from TOC Screened interval: ------Total well depth (TD): 38.0 Length of water column: 2 ( .<e.>"l.
Total water volume purged: '-/, 5
Depth to water (DTW): / C:,, I 6 Volume in well (gal): 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
Vol. (G) (C) Cond. (mS/cm) Oxygen(%) (mV)
t) t ~ 133~ fc,ZB //,,,'lb 0,2.02... =t I l) ss,,
7...t b 13'iD 6,6C, 1 '1, S2. D, L/ I~ ~1.lo 1?.3
3, 'S I 3l/S ,.1{ }Co.53 D, 'i30 3,S 7-1 l,,5
'-1. 5 13 Sb "· =I-( lfoS't Dt'-134 I I z.. :r:;. o
Remarks on Sampling and Well Condition:
Sample Collection Time: f 3 S 2-
Turbidity
(NTU)
ID, I,
14. 2-
8,-=l
""f,D
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 NCDEQ -
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, NCDEQ 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, NCDEQ 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 I (15A NCAC
13B .1600) that are typically analyzed using EPA Method 8260B.

The laboratory did not detect any of the targeted analytes 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.

2.2 EPA Method 6010D (ICP - metals)

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

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

Quality Control Information
Page 3

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

2.3 EPA Method 6020B (ICP - metals)

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

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

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

2.4 EPA Method 7470A (total mercury)

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

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

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

[QUALITY CONTROL DOCUMENTATION, AS PROVIDED BY THE
LABORATORY, IS PRESENTED IN ATTACHMENT 7, ALONG WITH THE
ASSOCIATED CERTIFICATE-OF-ANALYSIS]
ATTACHMENT 11

CORRESPONDENCE