13025_Davis Drive_Groundwater Monitoring_201009

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P.O. Box 33068
Raleigh, North Carolina
27636-3068
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TEL [phone]
FAX [phone]
September 20, 2010
Mr. Nick Burrows
Syngenta Biotechnology, Inc.
410 S Swing Rd
Greensboro, NC 27409
Re: Groundwater Monitoring, July 2010
9 Davis Drive Site, RTP, NC
Dear Mr. Burrows:
Kimley-Horn and Associates Inc (KHA) has completed a round of groundwater well
sampling for the 9 Davis Drive Site (former Hercules/IBM Site) on July 20th, 2010.
The purpose is to continue to evaluate the status of the contaminant plume in both the
shallow and deep aquifers to determine if natural attenuation of the contaminant
plume is continuing at this site. A Phase II Environmental Site Assessment (ESA) for
the above referenced site was completed in October 2008 (Appendix).
Based on the data collected during our sampling, laboratory analysis indicates that
volatile organic compounds (VOC) contaminant concentrations on the site are still
above regulatory limits and are below initial concentrations. However, VOC
concentrations did increase in MW-4 and MW-10S as compared to those recorded in
October 2008. The increases may be an artifact of seasonality as described below.
Nevertheless, natural attenuation and the reduction of chlorinated solvents (reductive
de-chlorination) still appear to be occurring at the subject property. KHA anticipates
that the State regulatory agency (NCDENR) responsible for oversight of this release
will continue to accept natural attenuation as a viable remedial action for this site, but
will probably require continued monitoring.
Groundwater Sampling
The depth to groundwater (Table 1) was measured in each of the thirteen wells on the
subject site. Elevations for top of casing for each well were documented in previous
reports for the site, and KHA continued to use the values presented in the GES (2004)
report to estimate the elevation of groundwater in July 2010 as well as October 2008.
An updated potentiometric surface for the shallow aquifer is presented in Figure 1.
The existing wells that were identified and sampled in July 2010 are MW-1, MW-2,
MW-4, MW-5, MW-7, MW-9, MW-10S, MW-10D, MW-12, MW-13S, MW-13D,
TW-I4, and TW-15. The designation of "S" and "D" after a well name indicates that
there was or is a well pair at that location and the "S" well is the shallow well and the
"D" well is the deep well.
Monitor wells MW-3 and MW-6, MW-8S, and MW-8D were not found. MW-8D is
the only well that was found in October 2008 that was not found this time. It was
originally located close to the edge of the parking lot and may have been covered by
dirt or debris. Based on the previous reports, this should not be problematic since
MW-8D did not reveal contamination in the latest monitoring results.
Prior to sampling, all wells were purged of 3 well volumes of water. Some wells
recovered slowly and were purged dry twice, yielding a minimum of 1.5 well volumes
purged. Slow recovery wells included MW-4, MW-10D, and TW14. Each well was
purged using either a peristaltic pump, a disposable bailer, or a decontaminated and
clean downhole whale (trash) pump. The wells were sampled using a disposable
bailer. A calibrated YSI water quality meter was used to gather temperature, pH,
dissolved oxygen, Redox Potential (ORP), and specific conductivity data. The data is
recorded in Table 2.
Results
The laboratory results have been summarized on Tables 3, 4, 5, and 6. The North
Carolina Ground Water Standards for each compound are also listed on the tables.
These standards represent the maximum allowable concentration allowed in
groundwater by the State of North Carolina. These limits are published in the North
Carolina Administrative Code, Title 15A, Subchapter 2L (last modified on December
1, 2005) and will often be referred to in this report as the NC 2L standards.
Table 3 summarizes the July 2010 laboratory results for the natural attenuation
indicator parameters. Table 4 summarizes the July 2010 laboratory results for the
VOC analyses, while Table 5 summarizes the July 2010 laboratory results for 8
RCRA metals. Table 6 incorporates all of the water quality data collected for each
detected VOC since 1996 into one table. The VOCs that have been detected at the site
are listed for each sampling event and for each well they were detected. The data
previous to the October 2008 sampling event was obtained from the GES (2004)
report. Tables 4, 5, and 6 also list the NC 2L standard for each compound.
VOCs were detected at concentrations above the NC 2L standards in five monitor
wells (Table 4): MW-4, MW-5, , MW-10S, and MW-12. The highest concentration of
each detected compound was found in wells MW-4 and MW-10S which are the two
shallow wells that historically have had the highest concentrations of VOCs (Table 6).
Acetone concentrations in MW-1, MW-2, and TW-14 were below detection in July
2010, down from 170, 7.7, and 190 ug/L respectively in October 2008. Except for
MW-4 and MW10S, total VOC concentrations detected in the wells sampled showed
either decreases or similar VOC concentrations as compared to those of the previous
sampling events. MW-4 and MW-10S had higher VOC concentrations compared to
those measured in October 2008. TCE concentration in MW-10S increased in July
2010 as compared to TCE concentration October 2008, but was still below prior
concentrations. TCE concentrations in MW-4 show a small but steady increase since
March of 1999. However, TCE and DCE concentrations have also increased
proportionally indicating that reductive de-chlorination is still occurring.
Groundwater from each well was analyzed for 8 RCRA metals: Arsenic, Barium,
Cadmium, Chromium, Lead, Mercury, Selenium, and Silver. Arsenic was detected in
MW-2, but below the NC 2L limit. Chromium and/or lead were detected in MW-1,
MW-2, MW-5, MW-7, MW-9, MW-10D, MW-13D, TW-14, and TW-15.
Concentrations of chromium exceeded NC 2L standards in MW-2 and MW-9.
Concentrations of lead exceeded NC 2L standards in MW-2, MW-9, TW-14, and
TW-15. Neither of these metals was detected in October 2008. Barium was detected
in all samples, but was below the NC 2L standard.
Natural Attenuation
As used in this report, natural attenuation refers to the use of a variety of physical,
chemical, or biological processes that act without human intervention to reduce the
concentration of contaminants in groundwater (EPA, 1998, p. 1) to achieve remedial
objectives.
Microbiological activity can contribute to natural attenuation. Indicators that
microbiological activity is occurring are reduced dissolved oxygen concentrations in
contaminated wells in comparison with non-contaminated wells, and the presence of
methane as a byproduct of the microbial activity. Table 2 shows that the dissolved
oxygen concentrations were relatively low in the wells where VOCs were detected
above the NC 2L standards (wells MW-4, MW-5, MW-10S, and MW-12).
Based on the data collected in July 2010 and October 2008 as well as the information
reported in the GES (2004) report, natural attenuation processes appear to be
continuing at this site. However, because concentrations of VOCs were higher for
MW-4 and MW-10S in particular, continued monitoring will likely be required.
Reductive Indicator Trends
Chlorinated solvents are typically biodegraded under natural conditions through
reductive de-chlorination. This process requires a carbon source, such as total organic
carbon (EPA, 1998, p. 3) which was detected in all of the seven wells sampled for
total organic carbon (Table 3). During this process, the chlorine atom in chlorinated
hydrocarbons is removed and replaced with a hydrogen atom, forming daughter
products of the original compound.
An example of reductive de-chlorination is presented below for chlorinated ethenes
(EPA, 1998, p.23) which were detected in several wells on this site in October 2008.
The reduction, or de-chlorination, of Tetrachloroethene (PCE) forms daughter
products in the following sequence: Tetrachloroethene (PCE) to Trichloroethene
(TCE) to Dichloroethene (DCE) to Vinyl Chloride (VC) to Ethene. Three polymers of
DCE are possible as daughter products created by biodegradation. The most common
is cis-],2DCE, then trans-1,2-DCE, and the least common is 1,I-DCE.
This biodegradation sequence for PCE appears to be continuing at the subject site.
The data below demonstrates which wells have daughter products from biodegradation
of PCE. PCE was detected in 5 wells in October 2008. In July 2010 it was no longer
detected in MW-9. Also, MW-5 no longer had detectable concentrations of TCE or
DCE in July 2010.
Dechlorination Sequence
Tetrachloroethene (PCE) De-chlorination Detected July 2010
PCE to MW-4, MW-5, MW-10S, MW-12
TCE to MW-4, MW-10S, MW-12
DCE to MW-4, MW-10S
VC to MW-4, MW-10S
Ethene None
Ethene was not detected in any of the well in July 2010. One reason could be that
ethene is more easily degraded than the chlorinated VOCs. Methane was detected in
MW-5, MW-9, MW-10S, and TW-14.
Conclusions and Recommendations
Natural attenuation was recommended as the preferred remedial action for this site in
1996, and periodic monitoring events have occurred in 1999, 2001, and 2004. No
groundwater sampling has been documented at this site from 2004 until October
2008. Previous reports prepared by other consultants for this site were reviewed. As a
result of that review, KHA determined that the groundwater quality of the deeper
aquifers needed to be better characterized. In October 2008, KHA installed two
temporary deep wells on site, and collected groundwater samples from those wells
plus twelve existing wells for analysis by inorganic compounds, volatile organic
compounds, and metals. KHA recommends that those two wells, originally intended to
be temporary wells, be converted to permanent wells to be utilized in future
monitoring events once the current demolition of the existing buildings has been
completed.
The July 2010 sampling revealed concentrations of lead and chromium in several
wells, some above the NC 2L limits (Table 5). These constituents were detected in
October 2008, but in fewer wells and at lower concentrations. Cadmium was not
detected in any of the July 2010 samples. This may be related to seasonal issues such
as rainfall input that would affect concentrations.
The July 2010 sampling also revealed increased concentrations of VOCs in MW-4
and MW-10S. As with the metals, this may be related to seasonality.
Based on the data collected during our investigation, KHA has determined that
contaminant concentrations on the site are still above regulatory limits, but continue to
indicate natural attenuation. Natural attenuation and the reduction of chlorinated
solvents (reductive de-chlorination) appear to be continuing at this location, despite of
the increase of VOC concentrations in the samples from MW-4 and MW-10S. KHA
anticipates that the State regulatory agency responsible for oversight of this release
will continue to accept natural attenuation as a viable remedial action for this site.
KHA recommends regular monitoring events to document the natural attenuation
process and to evaluate whether site conditions continue to support the biodegradation
of the contaminant plume.
If there is any additional information you need, or if you have any questions, please do
not hesitate to contact me at [phone].
Very truly yours,
KIMLEY-HORN AND ASSOCIATES, INC.
Todd St. John, P.E.
Tables
Appendix
References
Bain, G.L., and Thomas, J.D., 1966, Geology and Ground-Water in the Durham Area,
North Carolina; North Carolina Department of Water Resources, Division of Ground
Water, Ground-Water Bulletin Number 7, 147 p.
U.S. Environmental Protection Agency (EPA), 1998, Technical Protocol for
Evaluating Natural Attenuation of Chlorinated Solvents in Ground Water; Office of
Research and Development, EPA/600/R-98/128, September 1998.
Environmental Resources Management , Inc (ERM), 1996, "Comprehensive Site
Assessment Report", April 1996.
Environmental Resources Management, Inc (ERM), 1999, "Ground and Surface
Water Monitoring Report", March 1999.
Environmental Resources Management , Inc (ERM), 2000, "Ground and Surface
Water Monitoring Report", May 2000.
Groundwater & Environmental Services, Inc. (GES), 2001, "Groundwater Monitoring
Report", December 2001.
Groundwater & Environmental Services, Inc. (GES), 2004, "Groundwater Monitoring
Report", May 2004.
North Carolina Department of Natural Resources and Community Development
(NCDNRCD), 1985, Geologic Map of North Carolina: Division of Land Resources,
North Carolina Geological Survey, 1 plate.
TABLE 1
SUMMARY OF GROUNDWATER ELEVATION DATA
9 Davis Drive, Research Triangle Park, NC
WELL ID
TOC
ELEVATION
(feet amsl)
WATER LEVEL ELEVATION (feet amsl)
AND DATE MEASURED
12/16/1996 3/9/1999 5/16/2000 10/11/2001 3/23/2004 10/6-13/08 7/19-20/10
MW-1 333.73 324.08 323.13 323.13 NM 325.12 322.74 321.98
MW-2 322.24 305.74 304.29 304.42 303.67 305.72 304.83 304.24
MW-3 335.07 315.73 313.41 REMOVED REMOVED REMOVED REMOVED REMOVED
MW-4 318.77 312.61 311.96 311.42 310.67 313.41 311.66 310.32
MW-5 321.57 313.69 312.38 312.00 311.15 313.62 312.26 310.76
MW-6 332.29 327.14 NF NF NF NF NF NF
MW-7 326.20 311.55 310.69 310.28 308.80 312.28 309.88 309.2
MW-8S 324.22 318.17 316.69 317.27 315.65 319.73 NF NF
MW-8D 324.18 318.77 318.06 318.79 316.29
29*
NF 317.16 NF
MW-9 322.33 318.56 NM NF NF 319.42 316.65 315.04
MW-10S 313.14 311.08 310.49 309.12 309.06 309.29 310.32 308.17
MW-10D 312.66 290.98 302.21 300.56 299.88 284.31 299.82 298.82
PZ-11 308.61 307.96 NF NF NF NF NF NF
MW-12 312.02 307.94 307.06 306.14 305.64 304.02 306.88 304.94
MW-13S 320.99 308.72 307.90 308.44 304.72 308.91 306.29 304.79
MW-13D 320.94 308.66 307.62 306.97 304.44 308.72 306.15 303.54
PZ-14 312.89 306.09 307.78 DRY DRY DRY NF NF
TW-14 321.71 NI NI NI NI NI 259.11 317.68
TW-15 311.55 NI NI NI NI NI 309.33 309.23
Notes:
MW-1, MW-2, and MW-3 were installed as tick-up monitor wells by Front Royal Environmental in June 1996.
MW-4 through MW-8 were installed as flush-mounted wells by ERM in August 1996.
MW-8S through PZ-14 were installed by ERM in Nov-Dec 1996.
TW-14 and TW-15 were installed by KHA in October 2008.
NF = wellhead not found; NI = well not installed; NM = well not measured.
All well top of casing elevations reported in GES report dated March 2004, except TW-14 and TW-15 which were measured by KHA.
amsl = above mean sea level.
All data except October 2008 and July 2010 data were obtained from the GES report dated March 2004.
TABLE 2
SUMMARY OF FIELD DATA MEASUREMENTS
9 Davis Drive, Research Triangle Park, NC
WELL ID MONITORING
DATE
DISSOLVED OXYGEN
(ppm)REDOX (mV)Conductivity
(mS/cm)
pH Temperature (degree
Celsius)
MW- 1
Nov-96 0.98 -120 1000 6.60 14.90
Mar-99 4.97 178 899 7.06 14.24
May-00 1.58 98 990 6.58 16.39
Oct-08 1.24 135 804 7.01 17.81
July-10 1.72 207 748 6.8 16.6
MW- 2 Nov-96 1.75 -40 145 6.49 15.78Oct-08 2.40 57 971 7.09 18.52
July-10 2.9 121 863 7.0 16.9
MW- 3 Nov-96 1.30 -175 1215 7.00 14.00Mar-99 3.93 6 914 7.39 14.22
MW-4
Nov-96 0.54 -241 920 9.37 16.87
Mar-99 0.61 24 295 7.64 11.84
May-00 0.34 0 652 7.02 17.53
Oct-01 0.45 82 209 8.09 21.70
Mar-04 10.95 43 847 7.72 22.96
Oct-08 2.81 -45 714 7.13 18.36
July-10 1.09 195 662 7.13 17.1
MW- 5
Nov-96 1.20 -36 1025 6.56 20.25
Mar-99 7.92 NM 988 6.90 17.09
May-00 2.88 89 1060 6.38 20.87
Oct-08 1.01 138 983 6.85 25.88
July-10 1.86 82.5 771 6.9 22.2
MW-6 Nov-96 2.75 -100 842 6.74 18.35
MW- 7 Nov-96 0.93 -182 155 6.82 14.92Oct-08 2.52 141 760 7.17 18.22
July-10 5.25 246.5 438 7.0 16.7
MW-8S Nov-96 0.51 -104 770 6.20 16.10Mar-99 1.14 93 216 7.57 16.43
May-00 6.61 0 1220 6.10 16.91
MW- 8D
Nov-96 1.53 -144 1410 6.76 16.55Mar-99 2.50 77 739 9.36 14.07
May-00 2.41 0 920 8.36 17.86
Oct-08 1.14 -69 469 8.54 18.02
July-10 NF NF NF NF NF
MW- 9
Nov-96 1.60 -12 770 6.53 12.30
Oct-08 1.09 115 790 6.93 18.65
July-10 1.3 -170 458 9.4 17.1
MW- 10S
Nov-96 0.71 287 961 6.51 13.44Mar-99 NM NM NM NM NM
May-00 0.59 72 1000 6.54 15.65
Oct-01 0.09 300 1020 7.22 18.70
Mar-04 6.23 121 1020 6.66 14.73
Oct-08 0.50 120 814 6.96 17.96
July-10 1.42 -129 770 7.18 17.9
MW- 10D
Nov-96 2.67 -718 235 11.73 14.77
Mar-99 NM NM NM NM NM
May-00 3.52 146 851 7.62 17.15
Oct-01 0.85 197 660 9.25 17.90
Mar-04 8.39 194 746 8.44 14.90
Oct-08 1.20 111 474 8.30 16.34
July-10 6.2 70 445 8.63 15.9
MW- 12
Nov-96 1.05 325 950 6.54 15.00Mar-99 NM NM NM NM NM
May-00 6.80 69 1020 6.57 16.78
Oct-01 0.00 101 975 7.59 18.90
Mar-04 6.49 179 1030 6.52 15.24
Oct-08 0.50 128 784 6.76 18.17
July-10 1.39 51 740 6.94 16.3
MW-13S
Nov-96 0.87 247 229 6.59 14.47Mar-99 NM NM NM NM NM
May-00 8.43 107 3060 6.97 17.43
Oct-08 2.49 136 2178 6.78 16.49
July-10 6.44 114 1873 6.92 18.4
MW-13D
Nov-96 2.02 294 1070 7.40 14.25Mar-99 NM NM NM NM NM
May-00 2.75 102 980 6.65 15.49
Oct-08 0.89 35 740 7.51 15.69
July-10 3.4 64 686 7.5 15.08
TW-14 Oct-08 7.32 203 562 7.51 17.80July-10 4.5 125 572 7.5 20.4
TW-15 Oct-08 5.92 61 812 7.12 19.43July-10 1.92 26.1 838 7.35 16.9
Notes:
NM = well not measured.All data except October 2008 and July 2010 data was obtained from the GES report dated March 2004.
TABLE 3
SUMMARY OF NATURAL ATTENUATION ANALYTICAL RESULTS JULY 2010
9 Davis Drive, Research Triangle Park, NC
WELL ID
COMPOUND ANALYZED
ETHANE
(mg/L)
ETHENE
(mg/L)
METHANE
(mg/L)
TOTAL
ORGANIC
CARBON
(mg/L)CHLORIDE
(mg/L)
SULFATE
(mg/L)
NITRATE
(mg/L)
NITRITE
(mg/L)
DISSOLVED
MANGANESE
(mg/L)
MANGANESE
(mg/L)
SOLUABLE
IRON
(mg/L)
FERROUS
IRON
(mg/L)
TOTAL
IRON
(mg/L)
ALKALINITY
(mg/L)
MW-1 NA NA NA NA NA NA NA NA NA NA NA NA N/A NA
MW-2 NA NA NA NA NA NA NA NA NA NA NA NA N/A NA
MW-4 BDL BDL BDL 2.13 64.2 BDL0 0.569 BDL 0.119 0.178 BDL 4.07 4.07 332
MW-5 BDL BDL 0.034 1.07 50.5 17.1 0.808 NA BDL 0.187 BDL 4.24 4.24 424
MW-7 NA NA NA NA NA NA NA BDL NA 0.691 NA NA 23.4 NA
MW-8D NF NF NF NF NF NF NF NF NF NF NF NF NF NF
MW-9 BDL BDL 7.6 14 168 BDL BDL BDL 0.108 1.83 BDL 53.1 53.1 228
MW-10S BDL BDL 0.024 BDL 54.2 21.5 BDL 0.495 BDL 0.0102 BDL 0.255 0.255 408
MW-10D BDL BDL BDL BDL 83.1 BDL BDL 0.708 BDL 0.321 BDL 8.75 8.75 777
MW-12 NA NA NA NA NA NA NA NA NA NA NA NA N/A NA
MW-13S NA NA NA NA NA NA NA NA NA NA NA NA N/A NA
MW-13D NA NA NA NA NA NA NA NA NA NA NA NA N/A NA
TW-14 BDL BDL 0.190 4.52 90.5 BDL BDL BDL BDL 0.918 BDL 42.9 42.9 178
TW-15 BDL BDL BDL 1.14 159 BDL BDL NA 0.0281 1.37 BDL 34.1 34.1 342
Notes:
BDL = Below analytical detection limit.
NA = Not analyzed.
TABLE 4
SUMMARY OF GROUNDWATER VOLATILE ORGANIC COMPOUNDS ANALYTICAL RESULTS- JULY 2010
9 Davis Drive, Research Triangle Park, NC
VOLATILE
ORGANIC
COMPOUND
NCGWS MW-1 MW-2 MW-4 MW-5 MW-7 MW-8D MW-9 MW-10S MW-10D MW-12 MW-13S MW-13D TW-14 TW-15
Acetone 700 BDL BDL BDL BDL BDL NF BDL BDL BDL BDL BDL BDL BDL BDL
Carbon Disulfide 700 BDL BDL BDL BDL BDL NF BDL BDL BDL BDL BDL BDL BDL BDL
Carbon Tetrachloride 0.269 BDL BDL BDL BDL BDL NF BDL BDL BDL BDL BDL BDL BDL BDL
Chlorobenzene 50 BDL BDL 4.96 BDL BDL NF BDL 25.1 BDL BDL BDL BDL BDL BDL
Chloroethane 2800 BDL BDL BDL BDL BDL NF BDL BDL BDL BDL BDL BDL BDL BDL
Chloroform 70 BDL BDL BDL BDL BDL NF BDL BDL BDL BDL BDL BDL BDL BDL
1,2-Dichlorobenzene 24 BDL BDL 36.2 BDL BDL NF BDL 155 BDL BDL BDL BDL BDL BDL
1,4-Dichlorobenzene 1.4 BDL BDL BDL BDL BDL NF BDL BDL BDL BDL BDL BDL BDL BDL
1,1-Dichloroethane 70 BDL BDL 25.4 BDL BDL NF BDL 13.4 BDL BDL BDL BDL BDL BDL
1,1-Dichloroethene (DCE)7 BDL BDL 117 BDL BDL NF BDL 139 BDL 3.31 BDL BDL BDL BDL
cis-1,2-Dichloroethene (DCE)
2DCE) DCE)
70 BDL BDL 73.8 BDL BDL NF BDL 185 BDL 6.03 BDL BDL BDL BDL
trans-1,2-Dichloroethene (DCE)100 BDL BDL BDL BDL BDL NF BDL BDL 0.623 BDL BDL BDL BDL BDL
Tetrachloroethene (PCE)0.7 BDL BDL 56.6 1.02 BDL NF BDL 106 BDL 6.93 BDL BDL BDL BDL
Toluene 1000 BDL BDL BDL BDL BDL NF BDL BDL BDL BDL BDL BDL BDL BDL
1,1,1-Trichloroethane 200 BDL BDL 58.9 BDL BDL NF BDL 129 BDL 1.46 BDL BDL BDL BDL
Trichloroethene (TCE)2.8 BDL BDL 29.6 BDL BDL NF BDL 101 BDL 2.48 BDL BDL BDL BDL
Vinyl Chloride 0.015 BDL BDL 4.60 BDL BDL NF BDL 10 BDL BDL BDL BDL BDL BDL
Total VOCs 0 0 407.06 1.02 0 NF 0 863.5 0.623 20.21 0 0 0 0
Notes:
Only those compounds detected in at least one sample are presented on this table.
NCGWS = North Carolina Ground Water 2L Standard amended on December 1, 2005.
Bold and shaded values exceed the NCGWS for that compound.
BDL = Below analytical detection limit.
All values are in micro-grams per liter (ug/L).
TABLE 5
SUMMARY OF GROUNDWATER METALS ANALYTICAL RESULTS- JULY 2010
9 Davis Drive, Research Triangle Park, NC
METAL NCGWS MW-1 MW-2 MW-4 MW-5 MW-7 MW-8D MW-9 MW-10S MW-10D MW-12 MW-13S MW-13D TW-14 TW-15
Arsenic 50 BDL 10.9 BDL BDL BDL NF BDL BDL BDL BDL BDL BDL BDL BDL
Barium 2000 581 510 308 510 476 NF 729 248 211 347 694 313 351 540
Cadmium 1.75 BDL BDL BDL BDL BDL NF BDL BDL BDL BDL BDL BDL BDL BDL
Chromium 50 18.8 66.2 BDL BDL 27.9 NF 51.8 BDL 22.6 BDL 25.0 11.3 41.4 35.1
Lead 15 11.1 37.4 BDL 10.5 11.5 NF 54.0 BDL 11.9 BDL 12.2 BDL 35.3 26.0
Mercury 1.05 BDL BDL BDL BDL BDL NF BDL BDL BDL BDL BDL BDL BDL BDL
Selenium 50 BDL BDL BDL BDL BDL NF BDL BDL BDL BDL BDL BDL BDL BDL
Silver 17.5 BDL BDL BDL BDL BDL NF BDL BDL BDL BDL BDL BDL BDL BDL
Notes:
NCGWS = North Carolina Ground Water 2L Standard amended on December 1, 2005.Bold
and shaded values exceed the NCGWS for that compound.
BDL = Below analytical detection limit.
All values are in micrograms per liter (ug/L).
TABLE 6
SUMMARY OF GROUNDWATER VOLATILE ORGANIC COMPOUNDS ANALYTICAL RESULTS
9 Davis Drive, Research Triangle Park, NC
VOLATILE
ORGANIC
COMPOUND
NCGWS (ug/L)
VOLATILE ORGANIC COMPOUND ANALYTICAL RESULTS BY WELL ID AND SAMPLE DATE
MW-1 MW-2 MW-3
Aug-96 Nov-96 Mar-99 May-00 Oct-08 Jul-10 Aug-96 Nov-96 Oct-08 Jul-10 Aug-96 Nov-96 Mar-99 July-10
Acetone 700 5.00 BDL BDL BDL 170 BDL 3.00 1 7.7 BDL 5.00 BDL BDL NF
Benzene 1 BDL NA NA BDL BDL BDL BDL NA BDL BDL BDL NA BDL NF
Carbon Disulfide 700 NA NA NA NA BDL BDL NA NA BDL BDL NA NA NA NF
Carbon Tetrachloride 0.269 NA NA NA NA BDL BDL NA NA BDL BDL NA NA NA NF
Chlorobenzene 50 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NF
Chloroethane 2800 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NF
Chloroform 70 0.10 0.14 BDL BDL 1.9 BDL 0.08 0.08 BDL BDL BDL BDL BDL NF
1,2-Dichlorobenzene 24 BDL NA NA NA BDL BDL BDL NA BDL BDL BDL NA BDL NF
1,4-Dichlorobenzene 1.4 BDL NA NA NA BDL BDL BDL NA BDL BDL BDL NA BDL NF
Dichlorodifluoromethane 1400 0.40 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NF
1,1-Dichloroethane 70 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NF
1,1-Dichloroethene 7 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NF
cis-1,2-Dichloroethene 70 NA BDL BDL BDL BDL BDL NA BDL BDL BDL NA BDL BDL NF
trans-1,2-Dichloroethene 100 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NF
Ethylbenzene 550 BDL NA NA BDL BDL BDL BDL NA BDL BDL 0.07 NA BDL NF
Methyl Ethyl Ketone 4200 0.50 0.20 BDL BDL BDL BDL 0.20 0.20 BDL BDL 5.00 2.0 BDL NF
Methyl t-butyl Ether 200 BDL BDL BDL NA BDL BDL BDL BDL BDL BDL BDL BDL BDL NF
Methylene Chloride 4.6 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NF
Tetrachloroethene 0.7 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NF
Toluene 1000 0.07 NA NA BDL BDL BDL 0.07 NA BDL BDL BDL NA BDL NF
1,1,1-Trichloroethane 200 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NF
Trichloroethene 2.8 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NF
Trichlorofluoromethane 2100 0.10 0.30 BDL NA BDL BDL BDL BDL BDL BDL BDL BDL BDL NF
Vinyl Chloride 0.015 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.10 BDL BDL NF
Xylene (total)530 BDL NA NA BDL BDL BDL BDL NA BDL BDL BDL NA BDL NF
Total VOCs 6.17 0.64 0 0 171.9 0 3.35 1.28 7.7 0 10.17 2.0 0 NF
Notes:
Only those compounds historically detected in at least one sample are presented on this table. NCGWS = North Carolina Ground Water 2L Standard amended on December 1, 2005.Bold and shaded values exceed the NCGWS for that
compound.
BDL = Below analytical detection limit.
NA = data not available or compound not analyzed.
All data except October 2008 and July 2010 data was obtained from the GES report dated March 2004. All values are reported in micrograms per liter (ug/L).
TABLE 6 (continued)
SUMMARY OF GROUNDWATER VOLATILE ORGANIC COMPOUNDS ANALYTICAL RESULTS
9 Davis Drive, Research Triangle Park, NC
VOLATILE
ORGANIC
COMPOUND
NCGWS (ug/L)
VOLATILE ORGANIC COMPOUND ANALYTICAL RESULTS BY WELL ID AND SAMPLE DATE
MW-4 MW-5
Aug-96 Nov-96 Mar-99 May-00 Oct-01 Mar-04 Oct-08 Jul-10 Aug-96 Nov-96 Mar-99 May-00 Oct-08 Jul-10
Acetone 700 4.00 BDL BDL BDL BDL BDL BDL BDL 4.00 2 BDL BDL BDL BDL
Benzene 1 BDL BDL BDL BDL BDL BDL BDL BDL BDL NA BDL BDL BDL BDL
Carbon Disulfide 700 NA NA NA NA NA NA BDL BDL NA NA NA NA 0.95 BDL
Carbon Tetrachloride 0.269 NA NA NA NA NA NA 15 BDL NA NA NA NA BDL BDL
Chlorobenzene 50 7.10 4.4 BDL BDL BDL 3.6 4.3 4.96 BDL BDL BDL BDL BDL BDL
Chloroethane 2800 BDL 0.5 2.5 BDL BDL BDL 4.4 BDL BDL BDL BDL BDL BDL BDL
Chloroform 70 BDL 2.8 BDL BDL BDL 1.1 0.73 BDL 0.10 BDL BDL BDL 0.53 BDL
1,2-Dichlorobenzene 24 40 NA BDL BDL NA NA 39 36.2 BDL NA BDL BDL BDL BDL
1,4-Dichlorobenzene 1.4 BDL NA BDL BDL NA NA 2.0 BDL BDL NA BDL BDL BDL BDL
Dichlorodifluoromethane 1400 BDL BDL BDL BDL NA NA BDL BDL BDL BDL BDL BDL BDL BDL
1,1-Dichloroethane 70 60 36 2.1 43 16 14 36 25.4 BDL 0.17 BDL BDL BDL BDL
1,1-Dichloroethene 7 430 200 BDL 15 15 25 81 117 BDL 3 BDL BDL BDL BDL
cis-1,2-Dichloroethene 70 NA 220 BDL 9 NA NA 39 73.8 NA BDL BDL BDL BDL BDL
trans-1,2-Dichloroethene 100 280 BDL BDL BDL 13 55 BDL BDL BDL BDL BDL BDL BDL BDL
Ethylbenzene 550 BDL NA BDL BDL BDL BDL BDL BDL BDL NA BDL BDL BDL BDL
Methyl Ethyl Ketone 4200 2.0 16 BDL BDL BDL BDL BDL BDL 2 0.4 BDL BDL BDL BDL
Methyl t-butyl Ether 200 BDL BDL BDL BDL NA NA BDL BDL BDL BDL BDL BDL BDL BDL
Methylene Chloride 4.6 3.00 5 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Tetrachloroethene 0.7 290 110 BDL 11 13 15 46 56.6 5 5 BDL BDL 1.70 1.02
Toluene 1000 0.70 NA BDL BDL BDL BDL BDL BDL 0.06 NA 3.7 BDL BDL BDL
1,1,1-Trichloroethane 200 340 200 BDL 35 38 45 91 58.9 BDL 0.5 BDL BDL BDL BDL
Trichloroethene 2.8 70 35 BDL 6 5.2 10 19 29.6 BDL 0.07 BDL BDL 0.48 BDL
Trichlorofluoromethane 2100 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Vinyl Chloride 0.015 BDL 0.8 BDL BDL BDL 2.3 4.9 4.60 BDL BDL BDL BDL BDL BDL
Xylene (total)530 BDL NA BDL BDL BDL BDL BDL BDL BDL NA BDL BDL BDL BDL
Total VOCs 1526.8 830.5 4.6 119 100.2 171 382.33 407.06 11.16 11.14 3.7 0 3.66 1.02
Notes:
Only those compounds historically detected in at least one sample are presented on this table. NCGWS = North Carolina Ground Water 2L Standard amended on December 1, 2005.Bold and shaded values exceed the NCGWS for that
compound.
BDL = Below analytical detection limit.
NA = data not available or compound not analyzed.
All data except October 2008 and July 2010 data was obtained from the GES report dated March 2004. All values are reported in micrograms per liter (ug/L).
TABLE 6 (continued)
SUMMARY OF GROUNDWATER VOLATILE ORGANIC COMPOUNDS ANALYTICAL RESULTS
9 Davis Drive, Research Triangle Park, NC
VOLATILE
ORGANIC
COMPOUND
NCGWS (ug/L)
VOLATILE ORGANIC COMPOUND ANALYTICAL RESULTS BY WELL ID AND SAMPLE DATE
MW-6 MW-7 MW-8S
Aug-96 Nov-96 Jul-10 Aug-96 Nov-96 Oct-08 Jul-10 Aug-96 Nov-96 Mar-99 May-00 Jul-10
Acetone 700 5.00 2 NF 30 20 5.70 BDL 40 5 BDL 10 NF
Benzene 1 BDL NA NF 0.09 NA BDL BDL 0.11 NA BDL BDL NF
Carbon Disulfide 700 NA NA NF NA NA BDL BDL NA NA NA NA NF
Carbon Tetrachloride 0.269 NA NA NF NA NA BDL BDL NA NA NA NA NF
Chlorobenzene 50 BDL BDL NF BDL BDL BDL BDL BDL BDL BDL BDL NF
Chloroethane 2800 BDL BDL NF BDL BDL BDL BDL BDL BDL BDL BDL NF
Chloroform 70 0.10 BDL NF BDL BDL BDL BDL BDL BDL BDL BDL NF
1,2-Dichlorobenzene 24 BDL NA NF BDL NA BDL BDL BDL NA BDL BDL NF
1,4-Dichlorobenzene 1.4 BDL NA NF BDL NA BDL BDL BDL NA BDL BDL NF
Dichlorodifluoromethane 1400 BDL BDL NF BDL BDL BDL BDL BDL BDL BDL BDL NF
1,1-Dichloroethane 70 BDL BDL NF BDL BDL BDL BDL BDL 0.77 BDL BDL NF
1,1-Dichloroethene 7 BDL BDL NF BDL BDL BDL BDL BDL 3 2.9 BDL NF
cis-1,2-Dichloroethene 70 NA BDL NF NA BDL BDL BDL NA 25 16 19 NF
trans-1,2-Dichloroethene 100 BDL BDL NF BDL BDL BDL BDL BDL 0.53 BDL BDL NF
Ethylbenzene 550 BDL NA NF BDL NA BDL BDL BDL NA BDL BDL NF
Methyl Ethyl Ketone 4200 0.70 0.2 NF 27 87 BDL BDL 140 0.5 BDL BDL NF
Methyl t-butyl Ether 200 BDL BDL NF BDL BDL BDL BDL BDL NA BDL BDL NF
Methylene Chloride 4.6 BDL BDL NF BDL BDL BDL BDL BDL BDL BDL BDL NF
Tetrachloroethene 0.7 BDL BDL NF BDL BDL BDL BDL BDL 0.51 BDL BDL NF
Toluene 1000 0.08 NA NF 0.05 NA 0.68 BDL 0.17 BDL BDL BDL NF
1,1,1-Trichloroethane 200 BDL BDL NF BDL BDL BDL BDL BDL BDL BDL BDL NF
Trichloroethene 2.8 BDL BDL NF 0.33 BDL BDL BDL BDL BDL BDL BDL NF
Trichlorofluoromethane 2100 BDL BDL NF BDL BDL BDL BDL BDL BDL BDL BDL NF
Vinyl Chloride 0.015 BDL BDL NF BDL BDL BDL BDL BDL 0.5 2.3 BDL NF
Xylene (total)530 BDL NA NF 0.30 NA BDL BDL 0.40 BDL BDL BDL NF
Total VOCs 5.88 2.2 NF 57.77 107 6.38 0 180.68 35.81 21.2 29 NF
Notes:
Only those compounds historically detected in at least one sample are presented on this table. NCGWS = North Carolina Ground Water 2L Standard amended on December 1, 2005.Bold and shaded values exceed the NCGWS for that
compound.
BDL = Below analytical detection limit.
NA = data not available or compound not analyzed.
All data except October 2008 and July 2010 data was obtained from the GES report dated March 2004. All values are reported in micrograms per liter (ug/L).
TABLE 6 (continued)
SUMMARY OF GROUNDWATER VOLATILE ORGANIC COMPOUNDS ANALYTICAL RESULTS
9 Davis Drive, Research Triangle Park, NC
VOLATILE
ORGANIC
COMPOUND
NCGWS
(ug/L)
VOLATILE ORGANIC COMPOUND ANALYTICAL RESULTS BY WELL ID AND SAMPLE DATE
MW-8D MW-9 MW-10S
Nov-96 Mar-99 May-00 Oct-08 Jul-10 Nov-96 Oct-08 Jul-10 Nov-96 Mar-99 May-00 Oct-01 Mar-04 Oct-08 Jul-10
Acetone 700 20 BDL BDL BDL NF BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Benzene 1 NA BDL BDL BDL NF NA BDL BDL NA BDL BDL BDL BDL BDL BDL
Carbon Disulfide 700 NA NA NA BDL NF NA BDL BDL NA NA NA NA NA 1.1 BDL
Carbon Tetrachloride 0.269 NA NA NA BDL NF NA 6.7 BDL NA NA NA NA NA 12 BDL
Chlorobenzene 50 BDL BDL BDL BDL NF BDL BDL BDL 50 27 47 72 46 13 25.1
Chloroethane 2800 BDL BDL BDL BDL NF BDL BDL BDL 2 BDL BDL BDL BDL BDL BDL
Chloroform 70 BDL BDL BDL BDL NF BDL BDL BDL 5.6 BDL BDL BDL BDL 0.9 BDL
1,2-Dichlorobenzene 24 NA BDL BDL BDL NF NA 1.8 BDL NA 130 BDL NA NA 51 155
1,4-Dichlorobenzene 1.4 NA BDL BDL BDL NF NA BDL BDL NA BDL BDL NA NA 3.1 BDL
Dichlorodifluoromethane 1400 BDL BDL BDL BDL NF BDL BDL BDL BDL BDL BDL NA NA BDL BDL
1,1-Dichloroethane 70 BDL BDL BDL BDL NF 1 0.52 BDL 70 51 62 46 34 11 13.4
1,1-Dichloroethene 7 BDL BDL BDL BDL NF 6 9.1 BDL 350 370 420 400 240 100 139
cis-1,2-Dichloroethene 70 BDL BDL BDL BDL NF 0.60 0.52 BDL 360 270 300 NA NA 69 185
trans-1,2-Dichloroethene 100 BDL BDL BDL BDL NF BDL BDL BDL BDL BDL BDL 370 250 BDL BDL
Ethylbenzene 550 NA BDL BDL BDL NF NA BDL BDL NA BDL BDL BDL BDL BDL BDL
Methyl Ethyl Ketone 4200 11 BDL BDL BDL NF 0.2 BDL BDL 0.7 BDL BDL BDL BDL BDL BDL
Methyl t-butyl Ether 200 BDL NA BDL BDL NF BDL BDL BDL 0.3 BDL BDL NA NA BDL BDL
Methylene Chloride 4.6 BDL BDL BDL BDL NF BDL BDL BDL 6 BDL BDL BDL BDL BDL BDL
Tetrachloroethene 0.7 BDL BDL BDL BDL NF 5 6.0 BDL 180 150 210 200 150 34 106
Toluene 1000 NA BDL BDL BDL NF NA BDL BDL NA BDL BDL BDL BDL 0.60 BDL
1,1,1-Trichloroethane 200 BDL BDL BDL BDL NF 6 30 BDL 390 310 380 420 190 68 129
Trichloroethene 2.8 BDL BDL BDL BDL NF 0.77 8.2 BDL 140 140 160 200 120 47 101
Trichlorofluoromethane 2100 BDL NA BDL BDL NF 0.2 BDL BDL BDL BDL BDL BDL NA BDL BDL
Vinyl Chloride 0.015 BDL BDL BDL BDL NF BDL BDL BDL 1 BDL 48 42 30 5.7 10
Xylene (total)530 NA BDL BDL BDL NF NA BDL BDL NA BDL BDL BDL BDL BDL NA
Total VOCs 31 0 0 0 NF 19.77 62.84 0 1555.6 1448 1627 1750 1060 416.4 863.5
Notes:
Only those compounds historically detected in at least one sample are presented on this table. NCGWS = North Carolina Ground Water 2L Standard ammended on December 1, 2005.Bold and shaded values exceed the NCGWS for that
compound.
BDL = Below analytical detection limit.
NA = data not available or compound not analyzed.
All data except October 2008 and July 2010 data was obtained from the GES report dated March 2004. All values are reported in micrograms per liter (ug/L).
TABLE 6 (continued)
SUMMARY OF GROUNDWATER VOLATILE ORGANIC COMPOUNDS ANALYTICAL RESULTS
9 Davis Drive, Research Triangle Park, NC
VOLATILE
ORGANIC
COMPOUND
NCGWS (ug/L)
VOLATILE ORGANIC COMPOUND ANALYTICAL RESULTS BY WELL ID AND SAMPLE DATE
MW-10D MW-12
Nov-96 Mar-99 May-00 Oct-01 Mar-04 Oct-08 Jul-10 Nov-96 Mar-99 May-00 Oct-01 Mar-04 Oct-08 Jul-10
Acetone 700 3 BDL BDL BDL BDL 6.7 BDL BDL BDL BDL BDL BDL BDL BDL
Benzene 1 NA BDL BDL BDL BDL BDL BDL NA BDL BDL BDL BDL BDL BDL
Carbon Disulfide 700 NA NA NA NA NA BDL BDL NA NA NA NA NA BDL BDL
Carbon Tetrachloride 0.269 NA NA NA NA NA BDL BDL NA NA NA NA NA 3.4 BDL
Chlorobenzene 50 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Chloroethane 2800 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Chloroform 70 BDL BDL BDL BDL BDL BDL BDL 0.47 BDL BDL BDL 1.8 0.92 BDL
1,2-Dichlorobenzene 24 NA BDL BDL NA NA BDL BDL NA BDL BDL NA NA BDL BDL
1,4-Dichlorobenzene 1.4 NA BDL BDL NA NA BDL BDL NA BDL BDL NA NA BDL BDL
Dichlorodifluoromethane 1400 BDL BDL BDL NA NA BDL BDL BDL BDL BDL NA NA BDL BDL
1,1-Dichloroethane 70 BDL BDL BDL BDL BDL 0.43 BDL 0.78 1.4 BDL BDL BDL BDL BDL
1,1-Dichloroethene 7 12 1.8 BDL BDL BDL BDL BDL 7 16 8 9.4 6.7 3.0 3.31
cis-1,2-Dichloroethene 70 29 4.1 BDL NA NA BDL BDL 5 13 6 NA NA 5.1 6.03
trans-1,2-Dichloroethene 100 BDL BDL BDL BDL BDL BDL 0.623 BDL BDL BDL 12 6.9 BDL BDL
Ethylbenzene 550 NA BDL BDL BDL BDL BDL BDL NA BDL BDL BDL BDL BDL BDL
Methyl Ethyl Ketone 4200 0.4 BDL BDL BDL BDL BDL BDL 0.1 BDL BDL BDL BDL BDL BDL
Methyl t-butyl Ether 200 0.35 BDL BDL NA NA BDL BDL BDL BDL BDL NA NA BDL BDL
Methylene Chloride 4.6 0.4 BDL BDL BDL BDL BDL BDL 0.2 BDL BDL BDL BDL BDL BDL
Tetrachloroethene 0.7 7 1.9 BDL BDL BDL BDL BDL 27 34 19 29 16 6.4 6.93
Toluene 1000 NA 1.4 BDL BDL BDL 2.0 BDL NA BDL BDL BDL BDL 0.68 BDL
1,1,1-Trichloroethane 200 15 BDL BDL BDL BDL BDL BDL 9 30 11 19 7.3 3.8 1.46
Trichloroethene 2.8 0.35 BDL BDL BDL BDL BDL BDL 6 11 5 8 4.2 2.5 2.48
Trichlorofluoromethane 2100 BDL BDL BDL BDL NA BDL BDL BDL BDL BDL BDL NA BDL BDL
Vinyl Chloride 0.015 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Xylene (total)530 NA BDL BDL BDL BDL BDL NA NA BDL BDL BDL BDL BDL BDL
Total VOCs 67.5 9.2 0 0 0 9.13 0.623 55.55 105.4 49 77.4 42.9 25.8 20.21
Notes:
Only those compounds historically detected in at least one sample are presented on this table. NCGWS = North Carolina Ground Water 2L Standard amended on December 1, 2005.Bold and shaded values exceed the NCGWS for that
compound.
BDL = Below analytical detection limit.
NA = data not available or compound not analyzed.
All data except October 2008 and July 2010 data was obtained from the GES report dated March 2004. All values are reported in micrograms per liter (ug/L).
TABLE 6 (continued)
SUMMARY OF GROUNDWATER VOLATILE ORGANIC COMPOUNDS ANALYTICAL RESULTS
9 Davis Drive, Research Triangle Park, NC
VOLATILE
ORGANIC
COMPOUND
NCGWS (ug/L)
VOLATILE ORGANIC COMPOUND ANALYTICAL RESULTS BY WELL ID AND SAMPLE DATE
MW-13S MW-13D TW-14 TW-15
Nov-96 Mar-99 May-00 Oct-08 Jul-10 Nov-96 Mar-99 May-00 Oct-08 Jul-10 Oct-08 Jul-10 Oct-08 Jul-10
Acetone 700 4 BDL BDL BDL BDL 2 BDL BDL 4.6 BDL 190 BDL BDL BDL
Benzene 1 NA BDL BDL BDL BDL NA BDL BDL BDL BDL BDL BDL BDL BDL
Carbon Disulfide 700 NA NA NA 0.93 BDL NA NA NA BDL BDL BDL BDL BDL BDL
Carbon Tetrachloride 0.269 NA NA NA BDL BDL NA NA NA BDL BDL BDL BDL BDL BDL
Chlorobenzene 50 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Chloroethane 2800 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Chloroform 70 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
1,2-Dichlorobenzene 24 NA BDL BDL BDL BDL NA BDL BDL BDL BDL BDL BDL BDL BDL
1,4-Dichlorobenzene 1.4 NA BDL BDL BDL BDL NA BDL BDL BDL BDL BDL BDL BDL BDL
Dichlorodifluoromethane 1400 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
1,1-Dichloroethane 70 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
1,1-Dichloroethene 7 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
cis-1,2-Dichloroethene 70 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
trans-1,2-Dichloroethene 100 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Ethylbenzene 550 NA BDL BDL BDL BDL NA BDL BDL BDL BDL BDL BDL BDL BDL
Methyl Ethyl Ketone 4200 4 BDL BDL BDL BDL 5 BDL BDL BDL BDL BDL BDL BDL BDL
Methyl t-butyl Ether 200 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Methylene Chloride 4.6 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Tetrachloroethene 0.7 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Toluene 1000 NA BDL BDL BDL BDL NA BDL BDL BDL BDL BDL BDL BDL BDL
1,1,1-Trichloroethane 200 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Trichloroethene 2.8 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Trichlorofluoromethane 2100 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Vinyl Chloride 0.015 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Xylene (total)530 NA BDL BDL BDL BDL NA BDL BDL BDL BDL BDL BDL BDL BDL
Total VOCs 8 0 0 0.93 0 7 0 0 4.6 0 190 0 0 0
Notes:
Only those compounds historically detected in at least one sample are presented on this table. NCGWS = North Carolina Ground Water 2L Standard amended on December 1, 2005.Bold and shaded values exceed the NCGWS for that compound.
BDL = Below analytical detection limit.
NA = data not available or compound not analyzed.
All data except October 2008 and July 2010 data was obtained from the GES report dated March 2004. All values are reported in micrograms per liter (ug/L).
Appendix
TOCELEVATIONWELL ID (feet amsl) 12/16/1996 3/9/1999 5/16/2000 10/11/20013/23/2004 10/6-13/08MW-1 333.73 324.08 323.13 323.13 NM 325.12 322.74MW-2 322.24 305.74 304.29 304.42 303.67 305.72 304.83MW-3 335.07 315.73 313.41 REMOVED REMOVED REMOVED REMOVEDMW-4 318.77 312.61 311.96 311.42 310.67 313.41 311.66MW-5 321.57 313.69 312.38 312.00 311.15 313.62 312.26MW-6 332.29 327.14 NF NF NF NF NFMW-7 326.20 311.55 310.69 310.28 308.80 312.28 309.88MW-8S 324.22 318.17 316.69 317.27 315.65 319.73 NFMW-8D324.18318.77318.06318.79316.29NF317.16WATER LEVEL ELEVATION (feet amsl)AND DATE MEASUREDTABLE 1SUMMARY OF GROUNDWATER ELEVATION DATAHercules Incorporated, 9 Davis Drive, Research Triangle Park, NCMW 834.838.7738.0638.7936.9NF37.6MW-9 322.33 318.56 NM NF NF 319.42 316.65MW-10S 313.14 311.08 310.49 309.12 309.06 309.29 310.32MW-10D 312.66 290.98 302.21 300.56 299.88 284.31 299.82PZ-11 308.61 307.96 NF NF NF NF NFMW-12 312.02 307.94 307.06 306.14 305.64 304.02 306.88MW-13S 320.99 308.72 307.90 308.44 304.72 308.91 306.29MW-13D 320.94 308.66 307.62 306.97 304.44 308.72 306.15PZ-14 312.89 306.09 307.78 DRY DRY DRY NFTW-14 321.71 NI NI NI NI NI 259.11TW-15 311.55 NI NI NI NI NI 309.33Notes:MW-1, MW-2, and MW-3 were installed as tick-up monitor wells by Front Royal Environmental in June 1996.MW-4 through MW-8 were installed as flush-mounted wells by ERM in August 1996.MW-8S through PZ-14 were installed by ERM in Nov-Dec 1996.TW-14 and TW-15 were installed by KHA in October 2008.NF = wellhead not found; NI = well not installed; NM = well not measured.All well top of casing elevations reported in GES report dated March 2004, except TW-14 and TW-15 which were measured by KHA.amsl = above mean sea level.All data except 2008 data were obtained from the GES report dated March 2004.

MONITORING DISSOLVED OXYGEN REDOX Conductivity pH Temperature
WELL ID DATE (ppm) (mV) (mS/cm) (degree Celsius)
Nov-96 0.98 -120 1000 6.60 14.90
Mar-99 4.97 178 899 7.06 14.24
May-00 1.58 98 990 6.58 16.39
Oct-08 1.24 135 804 7.01 17.81
Nov-96 1.75 -40 145 6.49 15.78
Oct-08 2.40 57 971 7.09 18.52
Nov-96 1.30 -175 1215 7.00 14.00
Mar-99 3.93 6 914 7.39 14.22
Nov-96 0.54 -241 920 9.37 16.87
Mar-99 0.61 24 295 7.64 11.84
May-00 0.34 0 652 7.02 17.53
Oct-01 0.45 82 209 8.09 21.70
Mar-04 10.95 43 847 7.72 22.96
Oct-08 2.81 -45 714 7.13 18.36
Nov-96 1.20 -36 1025 6.56 20.25
Mar-99 7.92 NM 988 6.90 17.09
May-00 2.88 89 1060 6.38 20.87
Oct-08 1.01 138 983 6.85 25.88
MW-6 Nov-96 2.75 -100 842 6.74 18.35
Nov-96 0.93 -182 155 6.82 14.92
Oct-08 2.52 141 760 7.17 18.22
Nov-96 0.51 -104 770 6.20 16.10
Mar-99 1.14 93 216 7.57 16.43
May-00 6.61 0 1220 6.10 16.91
Nov-96 1.53 -144 1410 6.76 16.55
MW-7
TABLE 2
SUMMARY OF FIELD DATA MEASUREMENTS
Hercules Incorporated, 9 Davis Drive, Research Triangle Park, NC
MW-1
MW-2
MW-3
MW-4
MW-5
MW-8S
Mar-99 2.50 77 739 9.36 14.07
May-00 2.41 0 920 8.36 17.86
Oct-08 1.14 -69 469 8.54 18.02
Nov-96 1.60 -12 770 6.53 12.30
Oct-08 1.09 115 790 6.93 18.65
Nov-96 0.71 287 961 6.51 13.44
Mar-99 NM NM NM NM NM
May-00 0.59 72 1000 6.54 15.65
Oct-01 0.09 300 1020 7.22 18.70
Mar-04 6.23 121 1020 6.66 14.73
Oct-08 0.50 120 814 6.96 17.96
Nov-96 2.67 -718 235 11.73 14.77
Mar-99 NM NM NM NM NM
May-00 3.52 146 851 7.62 17.15
Oct-01 0.85 197 660 9.25 17.90
Mar-04 8.39 194 746 8.44 14.90
Oct-08 1.20 111 474 8.30 16.34
Nov-96 1.05 325 950 6.54 15.00
Mar-99 NM NM NM NM NM
May-00 6.80 69 1020 6.57 16.78
Oct-01 0.00 101 975 7.59 18.90
Mar-04 6.49 179 1030 6.52 15.24
Oct-08 0.50 128 784 6.76 18.17
Nov-96 0.87 247 229 6.59 14.47
Mar-99 NM NM NM NM NM
May-00 8.43 107 3060 6.97 17.43
Oct-08 2.49 136 2178 6.78 16.49
Nov-96 2.02 294 1070 7.40 14.25
Mar-99 NM NM NM NM NM
May-00 2.75 102 980 6.65 15.49
Oct-08 0.89 35 740 7.51 15.69
TW-14 Oct-08 7.32 203 562 7.51 17.80
TW-15 Oct-08 5.92 61 812 7.12 19.43
Notes:
NM = well not measured.
All data except October 2008 data was obtained from the GES report dated March 2004.
MW-13S
MW-13D
MW-8D
MW-9
MW-10S
MW-10D
MW-12
TOTAL ORGANIC DISSOLVED SOLUABLE FERROUS TOTALETHANE ETHENE METHANE CARBON CHLORIDE SULFATE NITRATE NITRITE MANGANESE MANGANESE IRON IRON IRON ALKALINITYWELL ID (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (ug/L) (mg/L) (mg/L) (ug/L) (mg/L)MW-1 NA NA NA NA NA NA NA NA NA NA NA NA NA NAMW-2 NA NA NA NA NA NA NA NA NA NA NA NA NA NACOMPOUND ANALYZEDTABLE 3SUMMARY OF NATURAL ATTENUATION ANALYTICAL RESULTS OCTOBER 2008Hercules Incorporated, 9 Davis Drive, Research Triangle Park, NCMW-4 BDL 0.009 0.014 4.1 62 17 0.2 0.2 BDL 234 BDL BDL 51 260MW-5 BDL BDL 0.423 4.6 26 11 BDL BDL BDL 78.5 BDL 0.091 323 170MW-7 NA NA NA NA NA NA NA NA NA NA NA NA NA NAMW-8DNA NANANANANANANA NA NA NA NANANAMW-9 BDL BDL 0.001 2.2 66 20 0.63 0.63 BDL 5.6 BDL BDL BDL 320MW-10S BDL BDL 0.0004 8.6 33 18 0.91 0.91 BDL BDL BDL BDL BDL 290MW-10D BDL BDL 0.0004 1.3 92 43 0.12 0.12 BDL 53 BDL 0.28 2190 BDLMW-12NA NANANANANANANA NA NA NA NANANAMW-13S NA NA NA NA NA NA NA NA NA NA NA NA NA NAMW-13D NA NA NA NA NA NA NA NA NA NA NA NA NA NATW-14 BDL BDL 0.0006 9.4 89 87 0.20 BDL BDL 55.7 BDL BDL BDL BDLTW-15 BDL BDL 0.0004 2.5 190 15 BDL BDL BDL 177 BDL BDL BDL 180Notes:BDL = Below analytical detection limit.NA = Not analyzed.
VOLATILE ORGANIC NCGWS MW-1 MW-2 MW-4 MW-5 MW-7 MW-8D MW-9 MW-10S MW-10D MW-12 MW-13S MW-13D TW-14 TW-15COMPOUND Acetone700 170 7.7 BDL BDL 5.70 BDL BDL BDL 6.7 BDL BDL 4.6 190 BDLCarbon Disulfide700 BDL BDL BDL 0.95 BDL BDL BDL 1.1 BDL BDL 0.93 BDL BDL BDLCarbon Tetrachloride0.269 BDL BDL15BDL BDL BDL6.7 12BDL3.4BDL BDL BDL BDLChlorobenzene50 BDL BDL 4.3 BDL BDL BDL BDL 13 BDL BDL BDL BDL BDL BDLChloroethane2800 BDL BDL 4.4 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDLChloroform70 1.9 BDL 0.73 0.53 BDL BDL BDL 0.9 BDL 0.92 BDL BDL BDL BDL1,2-Dichlorobenzene24 BDL BDL39BDL BDL BDL 1.851BDL BDL BDL BDL BDL BDL14-Dichlorobenzene14BDLBDL20BDLBDLBDLBDL31BDLBDLBDLBDLBDLBDLTABLE 4SUMMARY OF GROUNDWATER VOLATILE ORGANIC COMPOUNDS ANALYTICAL RESULTS- OCTOBER 2008Hercules Incorporated, 9 Davis Drive, Research Triangle Park, NC1,4 Dichlorobenzene1.4BDLBDL2.0BDLBDLBDLBDL3.1BDLBDLBDLBDLBDLBDL1,1-Dichloroethane70 BDL BDL 36 BDL BDL BDL 0.52 11 0.43 BDL BDL BDL BDL BDL1,1-Dichloroethene7BDLBDL81BDL BDL BDL9.1 100BDL 3.0 BDL BDL BDL BDLcis-1,2-Dichloroethene70 BDL BDL 39 BDL BDL BDL 0.52 69 BDL 5.1 BDL BDL BDL BDLTetrachloroethene0.7 BDL BDL46 1.70BDL BDL6.0 34BDL6.4BDL BDL BDL BDLToluene1000 BDL BDL BDL BDL 0.68 BDL BDL 0.60 2.0 0.68 BDL BDL BDL BDL1,1,1-Trichloroethane200 BDL BDL 91 BDL BDL BDL 30 68 BDL 3.8 BDL BDL BDL BDLTrichloroethene2.8 BDL BDL190.48 BDL BDL8.2 47BDL 2.5 BDL BDL BDL BDLVinyl Chloride0.015 BDL BDL4.9BDL BDL BDL BDL5.7BDL BDL BDL BDL BDL BDLTotal VOCs171.9 7.7 382.33 3.66 6.38 0 62.84 416.4 9.13 25.8 0.93 4.6 190 0Notes:Only those compounds detected in at least one sample are presented on this table.NCGWS = North Carolina Ground Water 2L Standard ammended on December 1, 2005.Bold and shaded values exceed the NCGWS for that compound.BDL = Below analytical detection limit.All values are in micro-grams per liter (ug/L).
METAL NCGWS MW-1 MW-2 MW-4 MW-5 MW-7 MW-8D MW-9 MW-10S MW-10D MW-12 MW-13S MW-13D TW-14 TW-15 Arsenic50 6.3 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDLBarium2000 392 180 291 127 409 195 406 300 312 391 744 303 50.9 244Cadmium1.75 BDL BDL16.10.40 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDLChromium50BDL BDL BDL BDL BDL BDL BDL BDL 10.7BDL BDL BDL 11.2BDLTABLE 5SUMMARY OF GROUNDWATER METALS ANALYTICAL RESULTS- OCTOBER 2008Hercules Incorporated, 9 Davis Drive, Research Triangle Park, NCChromium500.7.Lead15 BDL BDL BDL BDL BDL BDL BDL BDL 14.0 BDL BDL BDL BDL BDLMercury1.05 0.23 BDL BDL BDL BDL BDL BDL 0.64 BDL 0.16 BDL BDL BDL BDLSelenium50 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDLSilver17.5 6.8 BDL BDL 1.90 2.8 BDL BDL BDL BDL BDL BDL BDL BDL BDLNotes:NCGWS = North Carolina Ground Water 2L Standard ammended on December 1, 2005.Bold and shaded values exceed the NCGWS for that compound.BDL = Below analytical detection limit.All values are in micrograms per liter (ug/L).
VOLATILE NCGWSORGANIC (ug/L)COMPOUND Aug-96 Nov-96Mar-99 May-00 Oct-08 Aug-96 Nov-96Oct-08 Aug-96 Nov-96Mar-99Acetone700 5.00 BDL BDL BDL 170 3.00 1 7.7 5.00 BDL BDLBenzene1 BDL NA NA BDL BDL BDL NA BDL BDL NA BDLCarbon Disulfide700 NA NA NA NA BDL NA NA BDL NA NA NACarbon Tetrachloride0.269 NA NA NA NA BDL NA NA BDL NA NA NAChlorobenzene50 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDLChloroethane2800 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDLChloroform70 0.10 0.14 BDL BDL 1.9 0.08 0.08 BDL BDL BDL BDL1,2-Dichlorobenzene24 BDL NA NA NA BDL BDL NA BDL BDL NA BDL1,4-Dichlorobenzene1.4 BDL NA NA NA BDL BDL NA BDL BDL NA BDLDichlorodifluoromethane1400 0.40 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL1,1-Dichloroethane70 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL1,1-Dichloroethene7 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDLTABLE 6SUMMARY OF GROUNDWATER VOLATILE ORGANIC COMPOUNDS ANALYTICAL RESULTSHercules Incorporated, 9 Davis Drive, Research Triangle Park, NCVOLATILE ORGANIC COMPOUND ANALYTICAL RESULTS BY WELL ID AND SAMPLE DATEMW-1 MW-2 MW-3cis-1,2-Dichloroethene70 NA BDL BDL BDL BDL NA BDL BDL NA BDL BDLtrans-1,2-Dichloroethene100 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDLEthylbenzene550 BDL NA NA BDL BDL BDL NA BDL 0.07 NA BDLMethyl Ethyl Ketone4200 0.50 0.20 BDL BDL BDL 0.20 0.20 BDL 5.00 2.0 BDLMethyl t-butyl Ether200 BDL BDL BDL NA BDL BDL BDL BDL BDL BDL BDLMethylene Chloride4.6 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDLTetrachloroethene0.7 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDLToluene1000 0.07 NA NA BDL BDL 0.07 NA BDL BDL NA BDL1,1,1-Trichloroethane200 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDLTrichloroethene2.8 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDLTrichlorofluoromethane2100 0.10 0.30 BDL NA BDL BDL BDL BDL BDL BDL BDLVinyl Chloride0.015 BDL BDL BDL BDL BDL BDL BDL BDL 0.10 BDL BDLXylene (total)530 BDL NA NA BDL BDL BDL NA BDL BDL NA BDLTotal VOCs6.17 0.64 0 0 171.9 3.35 1.28 7.7 10.17 2.0 0Notes:Only those compounds historically detected in at least one sample are presented on this table.NCGWS = North Carolina Ground Water 2L Standard ammended on December 1, 2005.Bold and shaded values exceed the NCGWS for that compound.BDL = Below analytical detection limit.NA = data not available or compound not analyzed.All data except October 2008 data was obtained from the GES report dated March 2004.All values are reported in micrograms per liter (ug/L).
VOLATILE NCGWSORGANIC (ug/L)COMPOUND Aug-96 Nov-96Mar-99 May-00 Oct-01 Mar-04 Oct-08 Aug-96 Nov-96Mar-99 May-00 Oct-08Acetone700 4.00 BDL BDL BDL BDL BDL BDL 4.00 2 BDL BDL BDLBenzene1 BDL BDL BDL BDL BDL BDL BDL BDL NA BDL BDL BDLCarbon Disulfide700 NA NA NA NA NA NA BDL NA NA NA NA 0.95Carbon Tetrachloride0.269 NA NA NA NA NA NA15NA NA NA NA BDLChlorobenzene50 7.10 4.4 BDL BDL BDL 3.6 4.3 BDL BDL BDL BDL BDLChloroethane2800 BDL 0.5 2.5 BDL BDL BDL 4.4 BDL BDL BDL BDL BDLChloroform70 BDL 2.8 BDL BDL BDL 1.1 0.73 0.10 BDL BDL BDL 0.531,2-Dichlorobenzene2440NA BDL BDL NA NA39BDL NA BDL BDL BDL1,4-Dichlorobenzene1.4 BDL NA BDL BDL NA NA2.0BDL NA BDL BDL BDLDichlorodifluoromethane1400 BDL BDL BDL BDL NA NA BDL BDL BDL BDL BDL BDL1,1-Dichloroethane70 60 36 2.1 43 16 14 36 BDL 0.17 BDL BDL BDL1,1-Dichloroethene7430 200BDL15 15 25 81BDL 3 BDL BDL BDLTABLE 6 (continued)SUMMARY OF GROUNDWATER VOLATILE ORGANIC COMPOUNDS ANALYTICAL RESULTSHercules Incorporated, 9 Davis Drive, Research Triangle Park, NCVOLATILE ORGANIC COMPOUND ANALYTICAL RESULTS BY WELL ID AND SAMPLE DATEMW-4 MW-5cis-1,2-Dichloroethene70 NA 220 BDL 9 NA NA 39 NA BDL BDL BDL BDLtrans-1,2-Dichloroethene100280BDL BDL BDL 13 55 BDL BDL BDL BDL BDL BDLEthylbenzene550 BDL NA BDL BDL BDL BDL BDL BDL NA BDL BDL BDLMethyl Ethyl Ketone4200 2.0 16 BDL BDL BDL BDL BDL 2 0.4 BDL BDL BDLMethyl t-butyl Ether200 BDL BDL BDL BDL NA NA BDL BDL BDL BDL BDL BDLMethylene Chloride4.6 3.00 5 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDLTetrachloroethene0.7290 110BDL11 13 15 46 5 5BDL BDL1.70Toluene1000 0.70 NA BDL BDL BDL BDL BDL 0.06 NA 3.7 BDL BDL1,1,1-Trichloroethane200340 200BDL 35 38 45 91 BDL 0.5 BDL BDL BDLTrichloroethene2.870 35BDL6 5.2 10 19BDL 0.07 BDL BDL 0.48Trichlorofluoromethane2100 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDLVinyl Chloride0.015 BDL0.8BDL BDL BDL2.3 4.9BDL BDL BDL BDL BDLXylene (total)530 BDL NA BDL BDL BDL BDL BDL BDL NA BDL BDL BDLTotal VOCs1526.8 830.5 4.6 119 100.2 171 382.33 11.16 11.14 3.7 0 3.66Notes:Only those compounds historically detected in at least one sample are presented on this table.NCGWS = North Carolina Ground Water 2L Standard ammended on December 1, 2005.Bold and shaded values exceed the NCGWS for that compound.BDL = Below analytical detection limit.NA = data not available or compound not analyzed.All data except October 2008 data was obtained from the GES report dated March 2004.All values are reported in micrograms per liter (ug/L).
VOLATILE NCGWSORGANIC (ug/L)COMPOUND Aug-96 Nov-96Aug-96 Nov-96Oct-08 Aug-96 Nov-96Mar-99 May-00Acetone700 5.00 2 30 20 5.70 40 5 BDL 10Benzene1 BDL NA 0.09 NA BDL 0.11 NA BDL BDLCarbon Disulfide700 NA NA NA NA BDL NA NA NA NACarbon Tetrachloride0.269 NA NA NA NA BDL NA NA NA NAChlorobenzene50 BDL BDL BDL BDL BDL BDL BDL BDL BDLChloroethane2800 BDL BDL BDL BDL BDL BDL BDL BDL BDLChloroform70 0.10 BDL BDL BDL BDL BDL BDL BDL BDL1,2-Dichlorobenzene24 BDL NA BDL NA BDL BDL NA BDL BDL1,4-Dichlorobenzene1.4 BDL NA BDL NA BDL BDL NA BDL BDLDichlorodifluoromethane1400 BDL BDL BDL BDL BDL BDL BDL BDL BDL1,1-Dichloroethane70 BDL BDL BDL BDL BDL BDL 0.77 BDL BDL1,1-Dichloroethene7 BDL BDL BDL BDL BDL BDL 3 2.9 BDLVOLATILE ORGANIC COMPOUND ANALYTICAL RESULTS BY WELL ID AND SAMPLE DATESUMMARY OF GROUNDWATER VOLATILE ORGANIC COMPOUNDS ANALYTICAL RESULTSTABLE 6 (continued)Hercules Incorporated, 9 Davis Drive, Research Triangle Park, NCMW-6 MW-7 MW-8Scis-1,2-Dichloroethene70 NA BDL NA BDL BDL NA 25 16 19trans-1,2-Dichloroethene100 BDL BDL BDL BDL BDL BDL 0.53 BDL BDLEthylbenzene550 BDL NA BDL NA BDL BDL NA BDL BDLMethyl Ethyl Ketone4200 0.70 0.2 27 87 BDL 140 0.5 BDL BDLMethyl t-butyl Ether200 BDL BDL BDL BDL BDL BDL NA BDL BDLMethylene Chloride4.6 BDL BDL BDL BDL BDL BDL BDL BDL BDLTetrachloroethene0.7 BDL BDL BDL BDL BDL BDL 0.51 BDL BDLToluene1000 0.08 NA 0.05 NA 0.68 0.17 BDL BDL BDL1,1,1-Trichloroethane200 BDL BDL BDL BDL BDL BDL BDL BDL BDLTrichloroethene2.8 BDL BDL 0.33 BDL BDL BDL BDL BDL BDLTrichlorofluoromethane2100 BDL BDL BDL BDL BDL BDL BDL BDL BDLVinyl Chloride0.015 BDL BDL BDL BDL BDL BDL0.5 2.3BDLXylene (total)530 BDL NA 0.30 NA BDL 0.40 BDL BDL BDLTotal VOCs5.88 2.2 57.77 107 6.38 180.68 35.81 21.2 29Notes:Only those compounds historically detected in at least one sample are presented on this table.NCGWS = North Carolina Ground Water 2L Standard ammended on December 1, 2005.Bold and shaded values exceed the NCGWS for that compound.BDL = Below analytical detection limit.NA = data not available or compound not analyzed.All data except October 2008 data was obtained from the GES report dated March 2004.All values are reported in micrograms per liter (ug/L).
VOLATILE NCGWSORGANIC (ug/L)COMPOUND Nov-96Mar-99 May-00 Oct-08 Nov-96Oct-08 Nov-96Mar-99 May-00 Oct-01 Mar-04 Oct-08Acetone700 20 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDLBenzene1 NA BDL BDL BDL NA BDL NA BDL BDL BDL BDL BDLCarbon Disulfide700 NA NA NA BDL NA BDL NA NA NA NA NA 1.1Carbon Tetrachloride0.269 NA NA NA BDL NA6.7NA NA NA NA NA12Chlorobenzene50 BDL BDL BDL BDL BDL BDL5027 477246 13Chloroethane2800 BDL BDL BDL BDL BDL BDL 2 BDL BDL BDL BDL BDLChloroform70 BDL BDL BDL BDL BDL BDL 5.6 BDL BDL BDL BDL 0.91,2-Dichlorobenzene24 NA BDL BDL BDL NA 1.8 NA130BDL NA NA511,4-Dichlorobenzene1.4 NA BDL BDL BDL NA BDL NA BDL BDL NA NA3.1Dichlorodifluoromethane1400 BDL BDL BDL BDL BDL BDL BDL BDL BDL NA NA BDL1,1-Dichloroethane70 BDL BDL BDL BDL 1 0.527051 62 46 34 111,1-Dichloroethene7 BDL BDL BDL BDL 69.1 350 370 420 400 240 100VOLATILE ORGANIC COMPOUND ANALYTICAL RESULTS BY WELL ID AND SAMPLE DATEMW-8D MW-9 MW-10STABLE 6 (continued)SUMMARY OF GROUNDWATER VOLATILE ORGANIC COMPOUNDS ANALYTICAL RESULTSHercules Incorporated, 9 Davis Drive, Research Triangle Park, NCcis-1,2-Dichloroethene70 BDL BDL BDL BDL 0.60 0.52360 270 300NA NA 69trans-1,2-Dichloroethene100 BDL BDL BDL BDL BDL BDL BDL BDL BDL370 250BDLEthylbenzene550 NA BDL BDL BDL NA BDL NA BDL BDL BDL BDL BDLMethyl Ethyl Ketone4200 11 BDL BDL BDL 0.2 BDL 0.7 BDL BDL BDL BDL BDLMethyl t-butyl Ether200 BDL NA BDL BDL BDL BDL 0.3 BDL BDL NA NA BDLMethylene Chloride4.6 BDL BDL BDL BDL BDL BDL 6 BDL BDL BDL BDL BDLTetrachloroethene0.7 BDL BDL BDL BDL5 6.0 180 150 210 200 150 34Toluene1000 NA BDL BDL BDL NA BDL NA BDL BDL BDL BDL 0.601,1,1-Trichloroethane200 BDL BDL BDL BDL 6 30390 310 380 420190 68Trichloroethene2.8 BDL BDL BDL BDL 0.778.2 140 140 160 200 120 47Trichlorofluoromethane2100 BDL NA BDL BDL 0.2 BDL BDL BDL BDL BDL NA BDLVinyl Chloride0.015 BDL BDL BDL BDL BDL BDL1BDL48 42 30 5.7Xylene (total)530 NA BDL BDL BDL NA BDL NA BDL BDL BDL BDL BDLTotal VOCs31 0 0 0 19.77 62.84 1555.6 1448 1627 1750 1060 416.4Notes:Only those compounds historically detected in at least one sample are presented on this table.NCGWS = North Carolina Ground Water 2L Standard ammended on December 1, 2005.Bold and shaded values exceed the NCGWS for that compound.BDL = Below analytical detection limit.NA = data not available or compound not analyzed.All data except October 2008 data was obtained from the GES report dated March 2004.All values are reported in micrograms per liter (ug/L).
VOLATILE NCGWSORGANIC (ug/L)COMPOUND Nov-96Mar-99 May-00 Oct-01 Mar-04 Oct-08 Nov-96Mar-99 May-00 Oct-01 Mar-04 Oct-08Acetone700 3 BDL BDL BDL BDL 6.7 BDL BDL BDL BDL BDL BDLBenzene1 NA BDL BDL BDL BDL BDL NA BDL BDL BDL BDL BDLCarbon Disulfide700 NA NA NA NA NA BDL NA NA NA NA NA BDLCarbon Tetrachloride0.269 NA NA NA NA NA BDL NA NA NA NA NA3.4Chlorobenzene50 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDLChloroethane2800 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDLChloroform70 BDL BDL BDL BDL BDL BDL 0.47 BDL BDL BDL 1.8 0.921,2-Dichlorobenzene24 NA BDL BDL NA NA BDL NA BDL BDL NA NA BDL1,4-Dichlorobenzene1.4 NA BDL BDL NA NA BDL NA BDL BDL NA NA BDLDichlorodifluoromethane1400 BDL BDL BDL NA NA BDL BDL BDL BDL NA NA BDL1,1-Dichloroethane70 BDL BDL BDL BDL BDL 0.43 0.78 1.4 BDL BDL BDL BDL1,1-Dichloroethene7121.8 BDL BDL BDL BDL7 16 8 9.46.7 3.0MW-12MW-10DVOLATILE ORGANIC COMPOUND ANALYTICAL RESULTS BY WELL ID AND SAMPLE DATETABLE 6 (continued)SUMMARY OF GROUNDWATER VOLATILE ORGANIC COMPOUNDS ANALYTICAL RESULTSHercules Incorporated, 9 Davis Drive, Research Triangle Park, NCcis-1,2-Dichloroethene70 29 4.1 BDL NA NA BDL 5 13 6 NA NA 5.1trans-1,2-Dichloroethene100 BDL BDL BDL BDL BDL BDL BDL BDL BDL 12 6.9 BDLEthylbenzene550 NA BDL BDL BDL BDL BDL NA BDL BDL BDL BDL BDLMethyl Ethyl Ketone4200 0.4 BDL BDL BDL BDL BDL 0.1 BDL BDL BDL BDL BDLMethyl t-butyl Ether200 0.35 BDL BDL NA NA BDL BDL BDL BDL NA NA BDLMethylene Chloride4.6 0.4 BDL BDL BDL BDL BDL 0.2 BDL BDL BDL BDL BDLTetrachloroethene0.77 1.9BDL BDL BDL BDL27 34 19 29 16 6.4Toluene1000 NA 1.4 BDL BDL BDL 2.0 NA BDL BDL BDL BDL 0.681,1,1-Trichloroethane200 15 BDL BDL BDL BDL BDL 9 30 11 19 7.3 3.8Trichloroethene2.8 0.35 BDL BDL BDL BDL BDL6 11 5 8 4.22.5Trichlorofluoromethane2100 BDL BDL BDL BDL NA BDL BDL BDL BDL BDL NA BDLVinyl Chloride0.015 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDLXylene (total)530 NA BDL BDL BDL BDL BDL NA BDL BDL BDL BDL BDLTotal VOCs67.5 9.2 0 0 0 9.13 55.55 105.4 49 77.4 42.9 25.8Notes:Only those compounds historically detected in at least one sample are presented on this table.NCGWS = North Carolina Ground Water 2L Standard ammended on December 1, 2005.Bold and shaded values exceed the NCGWS for that compound.BDL = Below analytical detection limit.NA = data not available or compound not analyzed.All data except October 2008 data was obtained from the GES report dated March 2004.All values are reported in micrograms per liter (ug/L).
VOLATILE NCGWSTW-14 TW-15ORGANIC (ug/L)COMPOUND Nov-96Mar-99 May-00 Oct-08 Nov-96Mar-99 May-00 Oct-08 Oct-08 Oct-08Acetone700 4 BDL BDL BDL 2 BDL BDL 4.6 190 BDLBenzene1 NA BDL BDL BDL NA BDL BDL BDL BDL BDLCarbon Disulfide700 NA NA NA 0.93 NA NA NA BDL BDL BDLCarbon Tetrachloride0.269 NA NA NA BDL NA NA NA BDL BDL BDLChlorobenzene50 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDLChloroethane2800 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDLChloroform70 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL1,2-Dichlorobenzene24 NA BDL BDL BDL NA BDL BDL BDL BDL BDL1,4-Dichlorobenzene1.4 NA BDL BDL BDL NA BDL BDL BDL BDL BDLDichlorodifluoromethane1400 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL1,1-Dichloroethane70 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL1,1-Dichloroethene7 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDLTABLE 6 (continued)MW-13S MW-13DVOLATILE ORGANIC COMPOUND ANALYTICAL RESULTS BY WELL ID AND SAMPLE DATESUMMARY OF GROUNDWATER VOLATILE ORGANIC COMPOUNDS ANALYTICAL RESULTSHercules Incorporated, 9 Davis Drive, Research Triangle Park, NCcis-1,2-Dichloroethene70 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDLtrans-1,2-Dichloroethene100 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDLEthylbenzene550 NA BDL BDL BDL NA BDL BDL BDL BDL BDLMethyl Ethyl Ketone4200 4 BDL BDL BDL 5 BDL BDL BDL BDL BDLMethyl t-butyl Ether200 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDLMethylene Chloride4.6 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDLTetrachloroethene0.7 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDLToluene1000 NA BDL BDL BDL NA BDL BDL BDL BDL BDL1,1,1-Trichloroethane200 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDLTrichloroethene2.8 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDLTrichlorofluoromethane2100 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDLVinyl Chloride0.015 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDLXylene (total)530 NA BDL BDL BDL NA BDL BDL BDL BDL BDLTotal VOCs8 0 0 0.93 7 0 0 4.6 190 0Notes:Only those compounds historically detected in at least one sample are presented on this table.NCGWS = North Carolina Ground Water 2L Standard ammended on December 1, 2005.Bold and shaded values exceed the NCGWS for that compound.BDL = Below analytical detection limit.NA = data not available or compound not analyzed.All data except October 2008 data was obtained from the GES report dated March 2004.All values are reported in micrograms per liter (ug/L).