WS-3748_12330_CA_MRP_20141202

GROUNDWATER MONITORING REPORT
KODELL’S GROCERY
NC HWY 89
WESTFIELD, STOKES COUNTY, NORTH CAROLINA

NCDENR INCIDENT NUMBER: 12330
NCDENR CONTRACT NUMBER: N14007i-C

ECS PROJECT 09.24687

PREPARED FOR:

NCDENR, UST SECTION
RALEIGH, NORTH CAROLINA

DECEMBER 2, 2014

SITE INFORMATION

Site Name: Kodell’s Grocery

Site Address: NC Highway 89
Westfield, North Carolina 27053

Facility ID Number: UNKNOWN

NCDENR Incident Number: 12330

Site Risk Ranking: High (Assigned)

Land Use Category: Residential (Assigned)

Latitude/Longitude: 36.5097997 N / 80.354642 W

Responsible Party: Kodell Shelton

Current Property Owner: Kodell Shelton
4295 NC HWY 704
Westfield, North Carolina 27053

Primary Contact: Mr. Herbert Berger
NCDENR, Division of Waste Management, UST Section
1637 Mail Service Center
Raleigh, North Carolina 27699-1637

Primary Consultant: ECS Carolinas, LLP
4811 Koger Boulevard
Greensboro, North Carolina 27407
[phone]

Laboratory: Research and Analytical Laboratories, Inc.
Short Street
Kernersville, North Carolina 28224-0403
[phone]
Laboratory Certification No. 35

Release Information:

The subject site, Kodell’s Grocery is located off of NC Highway 89 across the street from
Francisco Elementary School in Westfield, Stokes County, North Carolina. Based on information
provided to ECS, three 1,000-gallon gasoline underground storage tanks (USTs) and one 555-
gallon kerosene UST were removed from the site in January 1994. Samples collected after the
USTs were removed indicated impact by Total Petroleum Hydrocarbons Gasoline Range
Organics (TPH GRO) beneath the gasoline and kerosene tanks. A Phase II LSA was
conducted in 2010 by Agra Environmental. Four monitoring wells (MW-1, MW-2, MW-3, and
MW-4) were installed and sampled in 2010. Groundwater analytical results indicated
compounds above the North Carolina 2L Ground Water Quality Standards (NC2LGWQS) in

TABLE OF CONTENTS
1.0 EXECUTIVE SUMMARY ................................................................................................................ 2
2.0 PROJECT INFORMATION 2
3.0 GROUNDWATER ASSESSMENT 3
4.0 RESULTS 4
5.0 CONCULSIONS 5
6.0 RECOMMENDATIONS 6

FIGURES

Figure 1 Site Location Map
Figure 2 Aerial Site Map
Figure 3 Site Map
Figure 4 Water-Supply Well Location Map
Figure 5 Groundwater Elevation Map
Figure 6 Benzene Isoconcentration Map
Figure 6A Toluene Isoconcentration Map
Figure 6B Ethylbenzene Isoconcentration Map
Figure 6C Total Xylenes Isoconcentration Map
Figure 6D Styrene Isoconcentration Map
Figure 6E Naphthalene Isoconcentration Map
Figure 6F n-Proplybenzene Isoconcentration Map
Figure 6G 1,2,4-Trimethylbenzene Isoconcentration Map

TABLES

Table 1 Water-Supply Well Ownership
Table 2 Summary of Monitoring Well Data
Table 3 Summary of Groundwater Analytical Results (Monitoring Wells)
Table 4 Summary of Groundwater Analytical Results (Water-Supply Wells)
Table 5 Geochemical Measurements

APPENDIX

Appendix A Laboratory Data Sheets and Chain of Custody Record
Appendix B Field Data Sheets
Appendix C Site Photographs
Appendix D 2010 Agra Environmental LSA Water-Supply Well Addresses
Appendix E 2010 Agra Environmental LSA Water-Supply Well Location Map

Groundwater Monitoring Report
Task Authorization Request No. 1 – Kodell’s Grocery
NC HWY 89
Westfield, Stokes County, North Carolina
NCDENR Incident No.: 12330
NCDENR Contract No. N14007i-C
ECS Project 09.24687
December 2, 2014

2
1.0 EXECUTIVE SUMMARY

As part of Task Authorization (TA) #1, NCDENR Contract # N14007i, ECS was contracted to
sample four Type II groundwater monitoring wells, sample five water-supply wells, and prepare
a State Trust/Federal Trust Fund (STF/FTF) monitoring report in regards to NCDENR incident
No. 12330. Monitoring well information was obtained from information obtained from a LSA and
monitoring well installation by Agra Environmental.

Laboratory analytical results from the current monitoring event indicated that targeted
compounds were detected in MW-1 and MW-3 above NC2LGWQS, but concentrations did not
exceed respective GCLs. The sample obtained from water-supply well WSW-9974 (Francisco
Elementary School) detected two trihalomethanes (THMs) above their respective NC2LGWQS.
The THMs are associated with the chlorination of drinking water at the school. Geochemical
data was collected on-site using a YSI Model 560 meter. Based on the geochemical data, the
average groundwater temperature was 14.99° C and the average conductivity was 0.11mS/cm. The
pH ranged from a low of 4.51 to 5.10 and the dissolved oxygen (DO) ranged from 3.07 mg/l to
4.71mg/l. Static water levels measured by a decontaminated electronic water meter, indicate
that the ground water flows northwest across the site. Analytical results were used to generate
Isoconcentration maps for compounds with concentrations above their respective
NC2LGWQSs. No Free product was detected in the monitoring wells. In general,
concentrations of targeted compounds are lower than samples obtained in 2013. Due of the
presence of the THMs, ECS recommends resampling the water-supply well WSW-9974. A
Health Risk Evaluation (HRE) issued by NCDENR, dated September 30, 2014, stated that
contaminants detected in WSW-9974 did not exceed applicable water standards. Therefore,
restrictions on the use of water from this water-supply well were not recommended. ECS
recommends continued annual groundwater sampling at the site.

2.0 PROJECT INFORMATION

The subject site, Kodell’s Grocery is located off of NC Highway 89 across the street from
Francisco Elementary School in Westfield, Stokes County, North Carolina. The area around the
site is a rural mixed residential and farm use area east of Westfield, North Carolina (Figure 1).
The building on site and adjacent lot are vacant. Formerly, three 1,000-gallon gasoline USTs
and one 555-gallon kerosene UST were operated on the site. Based on information provided to
ECS, the four USTs were removed from the site in January 1994. Samples collected after the
underground storage tanks (USTs) were removed indicated impact by Total Petroleum
Hydrocarbons Gasoline Range Organics (TPH GRO) below gasoline and kerosene tanks. A
Phase II Limited Site Assessment (LSA) was conducted in 2010 by Agra Environmental. Four
monitoring wells (MW-1, MW-2, MW-3, and MW-4) were installed at the site and sampled in
2010. Groundwater analytical results indicated compounds above the North Carolina 2L
Ground Water Quality Standards (NC2LGWQS) in samples collected from monitoring wells
MW-1 and MW-3. Nine water-supply wells were located within 1,000-feet of the site and public
water is not available in the vicinity of the site (Appendix E). Eight of the nine water-supply wells
are active and used as potable water sources (Appendix D).

Groundwater Monitoring Report
Task Authorization Request No. 1 – Kodell’s Grocery
NC HWY 89
Westfield, Stokes County, North Carolina
NCDENR Incident No.: 12330
NCDENR Contract No. N14007i-C
ECS Project 09.24687
December 2, 2014

3
A groundwater monitoring event was conducted at the site in February 2012. Analytical results
from the sampling event indicated targeted compounds were detected above their respective
(NC2LGWQS) in monitoring wells MW-1 and MW-3. It was also determined that the
groundwater flowed to the northeast. Another monitoring event was conducted in June 2012.
Results indicated targeted compounds were above their respective NC2LGWQS in monitoring
wells MW-1 and MW-3. Four water-supply wells were sampled within a 500 foot radius of the
site (WSW-0460, WSW-1737, WSW-9974, and WSW-2242). The water-supply well on-site
(WSW-8279) could not be sampled because it was inactive. Targeted compounds commonly
associated with chlorination of the water supply were indicated in the samples obtained from
well WSW-9974. In January 2013, groundwater monitoring wells and each active water-supply
wells within 500 feet of the site (WSW-0460, WSW-9974, WSW-1737, and WSW-2242) were
sampled. Analytical results indicated that several targeted compounds were detected at
concentrations above their respective NC2LGWQS in samples collected from monitoring well
MW-1 and MW-3.

3.0 GROUNDWATER ASSESSMENT

3.1 Monitoring Well Sampling

On September 19, 2014, ECS personnel collected samples from four monitoring wells (MW-1,
MW-2, MW-3, and MW-4). The locations of the wells are shown on Figure 3. Prior to sampling,
the wells were purged using a new disposable polyethylene bailer and new length of nylon cord.
The wells were developed/purged by evacuating a minimum of three well volumes using the
bailer and cord. The wells were developed/purged to remove sand, silt and other fine
sediments and to promote communication between the surrounding formation and the sand
pack surrounding the well’s screened interval. After purging was completed, the sampler wearing
a new pair of disposable nitrile gloves for each sampling point poured the groundwater sample from
the bailer into laboratory prepared containers. Each container was labeled and placed in a
cooler containing ice to maintain the samples at approximately 4 Celsius. The sample
containers were then delivered to Research & Analytical Laboratories, Inc. (R&A) in
Kernersville, North Carolina to be analyzed for volatile organic compounds (VOCs) using
Standard Method 6200B plus methyl tert butyl ether (MTBE), isopropyl ether (IPE), and ethylene
dibromide (EDB). A Chain of Custody Record was maintained and is included in the Appendix
A

3.2 Water-Supply Well Sampling

On September 19, 2014, ECS collected samples from four water-supply wells (WSW-0460,
WSW-9974, WSW-1737, and WSW-2242) located within 500-feet of the site. Ownership of the
sampled water-supply wells is illustrated in Table 1. The on-site water-supply well (WSW-8279)
was not sampled because the well was inactive and the property was vacant. The locations of
the wells are shown on Figure 4. Property ownership is summarized on Table 1. Prior to
sampling, the wells and household plumbing were purged by allowing the water to run for
approximately 20 minutes. After purging was completed, the sampler wearing a new pair of
disposable nitrile gloves for each sampling point, poured the water sample into laboratory prepared
containers. Each container was labeled and placed in a cooler containing ice to maintain the
Groundwater Monitoring Report
Task Authorization Request No. 1 – Kodell’s Grocery
NC HWY 89
Westfield, Stokes County, North Carolina
NCDENR Incident No.: 12330
NCDENR Contract No. N14007i-C
ECS Project 09.24687
December 2, 2014

4
samples at approximately 4 Celsius. The sample containers were then delivered to R&A to be
analyzed for VOCs using Standard Method 6200B plus MTBE, IPE, and EDB.
3.3 Groundwater Chemistry

Prior to collecting the groundwater samples, geochemical parameters (temperature, pH,
dissolved oxygen, and conductivity) were measured using a YSI Model 560 meter. The turbidity
was observed during the sampling and recorded on the Groundwater Sampling Data Sheets
(Appendix B).

3.4 Groundwater Flow Direction Measurements

On September 19, 2014, ECS measured the static water level (SWL) in four monitoring wells
using a decontaminated electronic water level meter. The static water levels and top of casing
elevations were used to calculate groundwater flow direction. The static water level measurements
can be found on Table 2.

4.0 RESULTS

4.1 Monitoring Well Sampling Results

Laboratory analysis of groundwater samples collected from monitoring wells MW-1 and MW-3
detected targeted compounds that exceed their respective NC2LGWQS; however, the
concentrations did not exceed their respective GCLs. Concentrations of total xylenes, naphthalene,
n-Propylbenzene, and 1,2,4-trimethylbenzene were detected above their respective NC2LGWQS in
monitoring well MW-1. Concentrations of benzene, toluene, ethylbenzene, total xylenes, methyl tert
butyl either, styrene, naphthalene, n-Propylbenzene, and 1,2,4-trimethylbenzene were detected
above their respective NC2LGWQS in monitoring well MW-3. No free product was observed in
the site monitoring wells. A summary of the current and historical groundwater analytical results
are included in Table 3. The laboratory data sheets are included in the Appendix B.

Using the laboratory analytical results of the groundwater samples collected from the groundwater
monitoring wells, isoconcentration maps showing the horizontal extent for the compounds which
were detected above the NC2LGWQS are included as Figure 6 through Figure 6G.

4.2 Water-Supply Well Sampling Results

Laboratory analysis of groundwater sample from water-supply well WSW-9974 detected chloroform
at a concentration of 2.3 parts per billion (ppb); however, the concentration does not exceed its
NC2LGWQS of 3 ppb. Dibromochloromethane and bromodichloromethane collected from water-
supply well WSW-9974 were detected above their respective NC2LGWQS.
Dibromochloromethane and bromodichloromethane are THMs generally associated with the on-site
chlorination of water at the site. A Health Risk Evaluation (HRE) issued by NCDENR, dated
September 30, 2014, stated that contaminants detected in WSW-9974 did not exceed
applicable water standards. Therefore, restrictions on the use of water from this water-supply
well were not recommended (Appendix A). Laboratory analysis of groundwater samples collected
from water-supply wells WSW-0460, WSW-2242, and WSW-1737 did not detect targeted
Groundwater Monitoring Report
Task Authorization Request No. 1 – Kodell’s Grocery
NC HWY 89
Westfield, Stokes County, North Carolina
NCDENR Incident No.: 12330
NCDENR Contract No. N14007i-C
ECS Project 09.24687
December 2, 2014

5
compounds above the laboratory quantitation limits. A summary of the current and historical
groundwater analytical results are included in Table 4.

4.3 Groundwater Chemistry

Based on the geochemical data, the average groundwater temperature was 14.99° C and the
average conductivity was 0.11mS/cm. The pH ranged from a low of 4.51 to 5.10 and the dissolved
oxygen (DO) ranged from 3.07 mg/l to 4.71mg/l. The geochemical measurements are shown on
Table 5.

4.4 Groundwater Flow Direction

The groundwater flow direction is generally to the southwest across the site. Groundwater at the
site is flowing to the northwest under a gradient of 3.75ft/ft as determined between MW-2 and
MW-4.

5.0 CONCLUSIONS

ECS has completed the groundwater monitoring sampling at the site. ECS sampled four Type II
monitoring wells and four water-supply wells located within 500 feet of the site. Based on on-site
groundwater measurements and laboratory analytical results, ECS concludes the following:

 The groundwater elevations as determined on September 19, 2014, were used to
prepare a potentiometric map of the groundwater surface of the site. The groundwater
flow direction is generally to the northwest across the site;

 Monitoring well MW-1 concentrations of total xylenes, naphthalene, n-Propylbenzene, and
1,2,4-trimethylbenzene were detected above their respective NC2LGWQS. Monitoring well
MW-3 concentrations of benzene, toluene, ethylbenzene, total xylenes, methyl tert butyl
either, styrene, naphthalene, n-Propylbenzene, and 1,2,4-trimethylbenzene were detected
above their respective NC2LGWQS. The concentrations of the detected compounds have
decreased since the previous sampling event.

 Analysis of groundwater collected from water-supply well WSW-9974 detected
dibromochloromethane and bromodichloromethane above their respective NC2LGWQS.
Dibromochloromethane and bromodichloromethane are THMs generally associated with the
on-site chlorination of water at the site. The concentration of each compound is lower than
the amount detected in 2012. Laboratory analysis of groundwater sample WSW-9974
detected chloroform at a concentration of 2.3 ppb; however, the concentration does not
exceed its NC2LGWQS of 3 ppb. A Health Risk Evaluation (HRE) issued by NCDENR,
dated September 30, 2014, stated that contaminants detected in WSW-9974 did not
exceed applicable water standards. Therefore, restrictions on the use of water from this
water-supply well were not recommended.

 No free product was detected in the monitoring wells;

Groundwater Monitoring Report
Task Authorization Request No. 1 – Kodell’s Grocery
NC HWY 89
Westfield, Stokes County, North Carolina
NCDENR Incident No.: 12330
NCDENR Contract No. N14007i-C
ECS Project 09.24687
December 2, 2014

6
 The concentrations of petroleum related hydrocarbons generally decreased in each well
sampled since the 2010 through 2014 sampling events.

 Laboratory analysis of groundwater samples collected from water-supply wells WSW-0460,
WSW-2242 and WSW-1737 did not detect targeted compounds above the laboratory
quantitation limits.

 Contaminate plume is not delineated to the north or down gradient from MW-3.

6.0 RECOMMENDATIONS

Because of the presence of THMs, ECS recommends resampling the water-supply well (WSW-
9974). Based on the laboratory analytical results, ECS recommends that a copy of this report be
sent to the NCDENR for their review. ECS recommends continued annual groundwater
sampling at the site. ECS also recommends additional monitoring wells be installed on the site
northwest and down gradient of monitoring well MW-3 in order to fully delineate contaminate plume.

FIGURES
SOURCE:
USGS TOPOGRAPHIC MAP
STEWART SE, DATE 1968 REVISED 1938; HANGING
ROCK, DATED 1964 REVISED 1977; PILOT MOUNTAIN,
DATE 1964 REVISED 1977, CLAUDVILLE, DATED 1968
REVISED 1977;NC QUADRANGLES
FIGURE 1
SITE LOCATION MAP
KODELL’S GROCERY
NC HIGHWAY 89
WESTFIELD, STOKES COUNTY, NORTH
CAROLINA
NCDENR INCIDENT # 12330
ECS PROJECT NO. 09-24687
SITE
APPROXIMATE SITE BOUNDARY
SCALE (IN FEET)
2,000 1,000 0 2,000
SOURCE:
STOKES COUNTY GIS DEPARTMENT
AERIAL PHOTOGRAPH, DATED 2010
FIGURE 2
AERIAL SITE MAP
KODELL’S GROCERY
NC HIGHWAY 89
WESTFIELD, STOKES COUNTY, NORTH
CAROLINA
NCDENR INCIDENT # 12330
ECS PROJECT NO. 09-24687
APPROXIMATE SITE BOUNDARY
MW-3
MW-1
MW-4
MW-2
SCALE (IN FEET)
140 70 0 140
SOURCE:
STOKES COUNTY GIS DEPARTMENT
AERIAL PHOTOGRAPH, DATED 2010
FIGURE 4
500’ RADIUS MAP
KODELL’S GROCERY
NC HIGHWAY 89
WESTFIELD, STOKES COUNTY, NORTH
CAROLINA
NCDENR INCIDENT # 12330
ECS PROJECT NO. 09-24687
APPROXIMATE SITE BOUNDARY
WSW-9974
WSW-1737
WSW-0460
WSW-2242
SCALE (IN FEET)
140 70 0 140
WSW-8279

TABLES
KODELL'S GROCERY
WESTFIELD, NC
NCDENR INCIDENT # 12330
ECS PROJECT # 09-24687
TABLE 1: WATER SUPPLY WELL OWNERSHIP
Well ID Direction from Site Owner Owner Address Property Address Well Usage Distance from
Source Area (ft.)
Municipal Water
Available
WSW-8279 N/A Kodell & Betty R. Shelton 4295 NC 704 HWY
Westfield, NC 27053
HWY 89 W Westfield,
NC 27053 (SITE)Inactive 60 No
WSW-0460 E Judy Ellen Tucker 7118 HWY 89 W
Westfield, NC 27053
7118 HWY 89 W Westfield,
NC 27053
Active, Sole
Source 600 No
WSW-9974 S Stokes County Board of
Education
P.O. Box 50 Danbury,
NC 27016
7165 HWY 89 W Westfield,
NC 27053
Active, Sole
Source 550 No
WSW-1737 E Francisco Fire Station P.O. Box 15
Westfield, NC 27053
7100 HWY 89 W Westfield,
NC 27053
Active, Sole
Source 90 No
WSW-2442 SW Larry G. & Sandra C.
Francis
1045 Horeshoe Rd.
Westfield, NC 27053
1045 Horeshoe Rd.
Westfield, NC 27053
Active, Sole
Source 350 No
*Water Supply Well Owner information was gathered from Phase II LSA conducted by Agra Environmental in 2010.
KODELL'S GROCERY
WESTFIELD, NC
NCDENR INCIDENT #12330
ECS PROJECT # 09-24687
WELL ID #
DATE
WATER
LEVEL
MEASURED
TOP OF
CASING
ELEVATION
(ft.)
APPROXIMATE
CONSTRUCTED
WELL DEPTH
(ft.)
SCREENED
INTERVAL (ft
BLS)
DEPTH TO
WATER
FROM TOP
OF CASING
(ft.)
DEPTH TO
FREE
PRODUCT
FROM TOP OF
CASING (ft.)
FREE
PRODUCT
THICKNESS
(ft.)
MEASURED
GROUNDWATER
ELEVATION (ft.)
MEASURED
FREE
PRODUCT
ELEVATION
(ft.)
06/14/2010 24.46 ND ND 75.54 ND
02/24/2012 25.79 ND ND 74.21 ND
06/07/2012 25.22 ND ND 74.78 ND
01/08/2013 26.43 ND ND 73.57 ND
09/19/2014 24.9 ND ND 75.1 ND
06/14/2010 24.7 ND ND 76.32 ND
02/24/2012 26.18 ND ND 74.84 ND
06/07/2012 27.86 ND ND 73.16 ND
01/08/2013 26.84 ND ND 74.18 ND
09/19/2014 25.35 ND ND 75.67 ND
06/14/2010 23.69 ND ND 74.29 ND
02/24/2012 24.8 ND ND 73.18 ND
06/07/2012 24.31 ND ND 73.67 ND
01/08/2013 25.37 ND ND 72.61 ND
09/19/2014 24.1 ND ND 73.88 ND
06/14/2010 21.38 ND ND 74.5 ND
02/24/2012 22.52 ND ND 73.36 ND
06/07/2012 21.97 ND ND 73.91 ND
01/08/2013 23.18 ND ND 72.7 ND
09/19/2014 21.6 ND ND 74.28 ND
ND- Not Detected
*Monitoring Well data and Top of Casing elevation was collected from Phase II LSA conducted by Agra Environmental in 2010.
15-3535
35
35
TABLE 2: SUMMARY OF MONITORING WELL DATA
20-40
15-35
15-35
MW-2
95.88
40
101.02
MW-3 97.98
MW-1 100
MW-4
KODELL'S GROCERYWESTFIELD, NCNCDENR INCIDENT # 12330ECS PROJECT #09-24687Sample IdentificationSample Date 3/4/2010 6/14/2010 2/24/2012 6/7/2012 1/8/2013 9/19/2014 6/14/2010 2/24/2012 6/7/2012 1/8/2013 9/19/2014 6/14/2010 2/24/2012 6/7/2012 1/8/2013 9/19/2014 6/14/2010 2/24/2012 6/7/2012 1/8/2013 9/19/2014Benzene <4.0 <5.4 ND 22 4.5 <.5 ND ND ND ND <.5 1,600 1,800 2,000 802 460 ND ND ND ND <.5 1 5,000Toluene 3,900 2,500 6,200 4,100 3,200 435 ND ND ND ND <.5 26,000 1 46,000 22,600 21,600 ND ND ND ND <.5 600 260,000Ethylbenzene6,200 3,700 2,200 1900 1,190 280 ND ND ND ND <.5 1,600 2,600 28,00 2,060 2,040 ND ND ND ND <.5 600 84,500Total Xylenes30,000 18,500 9,100 7,400 5,460 1,540 ND ND ND ND <1 9,100 13,000 15,000 10,840 9,490 ND ND ND ND <1 500 85,500Methyl Tertbutyl EtherND 79J ND ND 3.3 <.5 ND ND ND ND <.5 ND ND ND 2.9 <.5 ND ND ND ND <.5 20 20,000Isopropyl EtherNANANAND ND <.5 NANAND ND <.5 NANA13 13 <.5 NANAND ND <.5 70 70,000EDB (504.1) NANANAND ND <.5 NANAND ND <.5 NANAND ND <.5 NANAND ND <.5 0 50Styrene 440 210 210 110 ND 19.7 ND ND ND ND <.5 300 420 560 ND 360 ND ND ND ND <.5 70 70,000Chloroform NANANAND ND <.5 NANAND ND <.5 NANAND ND <.5 NANAND ND <.5 70 70,000Bromoform NANANAND ND <1 NANAND ND <1 NANAND ND <1 NANAND ND <1 4 4,000Chloroethane ND ND ND ND ND <1 ND ND ND ND <1 ND ND ND ND <1 ND ND ND ND <1 3 3,000Dibromochloromethane NANANAND ND <.5 NANAND ND <.5 NANAND ND <.5 NANAND ND <.5 0.4 400Bromodichloromethane NANANAND ND <.5 NANAND ND <.5 NANAND ND <.5 NANAND ND <.5 0.6 NLAcetoneNANANAND ND <25 NANAND ND <25 NANA100 ND <25 NANAND ND <25 6 6MNaphthaleneNANANA550 472 83.7 NANAND ND <.5 NANA400 371J 265 NANAND ND <.5 6 6,000n-Butylbenzene84J 54 61 46 ND 8.1 ND ND ND ND <.5 ND 20 15 ND <.5 ND ND ND ND <.5 70 6,900sec-Butylbenzene51 ND 49J 26 ND 6.8 ND ND ND ND <.5 ND 17 7.5 ND <.5 ND ND ND ND <.5 70 8,500Isopropyl Benzene380 280 190 180 139 31.8 ND ND ND ND <.5 41 70 71 70.6 46.8 ND ND ND ND <.5 70 25,000p-IsopropyltolueneNANANA30 ND 12.5 NANAND ND <.5 NANA12 ND <.5 NANAND ND <.5 25 1,700n-Propylbenzene1,200 820 520 540 369 107 ND ND ND ND <.5 120 170 200 192 135 ND ND ND ND <.5 70 30,0001,2,4-Trimethylbenzene 9,500 5,700 3,400 2,400 2,310 522 ND ND ND ND <.5 1,100 7 1,300 1,340 987 ND ND ND ND <.5 400 28,5001,3,5-Trimethylbenzene 2,600 1,700 1,000 1,000 2,490 188 ND ND ND ND <.5 330 390 510 1,260 299 ND ND ND ND <.5 400 25,000Naphthalene1,900 1,300 770 NANANAND NANANANA250 430 NANANAND ND NANANA6 6,0002-Methylnaphthalene1,100 370 ND NANANAND NANANANA30J ND NANANAND ND NANANA30 12,500Lead 75 55 NANANANAND NANANANA20 NANANANAND NANANANA15 15,000C5-C8 Aliphatics 12,000 12,000 NANANANAND NANANANA50,000 NANANANAND NANANANA400 NLC9-C12 Aliphatics 91,000 41,000 NANANANAND NANANANA23,000 NANANANAND NANANANA700 NLC9-C18 Aliphatics 1,900 590 NANANANAND NANANANAND NANANANAND NANANANA700 NLC19-C36 Aliphatics ND ND NANANANAND NANANANAND NANANANAND NANANANA10,000 NLC9-C10 Aromatics 29,000 22,000 NANANANAND NANANANA5,100 NANANANAND NANANANA200 NLC11-C22 Aromatics 3,000 1,500 NANANANAND NANANANA230 NANANANAND NANANANA200 NLNotes:NC2LGWQS = North Carolina 2L Groundwater Quality Standard GCL = Gross Contaminant Level NS-FP= Not sampled; Free ProductNS = Not SampledNA = Not Analyzed for This Compoundµg/l = micrograms per liter = ppb (parts per billion)J-Value = Estimated value between laboratory reporting limit and method detection limit Value exceed NC2LGWQSValue exceeds GCL6200B6106010BMW-2MADEP VPH/EPH TABLE 3: SUMMARY OF GROUNDWATER ANALYTICAL RESULTS (MONITORING WELLS)MW-1NC2LGWQS GCLMW-3 MW-4
KODELL'S GROCERY
WESTFIELD, NC
NCDENR INCIDENT #12330
ECS PROJECT # 09-24687
Sample Identification
Sample Date ###############09/19/2014 ###############09/19/2014 ###############09/19/2014 ###############09/19/2014
Benzene ND ND <.5 ND ND <.5 ND ND <.5 ND ND <.5 1 5,000
Toluene ND ND <.5 ND ND <.5 ND ND <.5 ND ND <.5 600 260,000
Ethylbenzene ND ND <.5 ND ND <.5 ND ND <.5 ND ND <.5 600 84,500
Total Xylenes ND ND <1 1.06J ND <1 ND ND <1 ND ND <1 500 85,500
Methyl Tertbutyl Ether ND ND <.5 ND ND <.5 ND ND <.5 ND ND <.5 20 20,000
Isopropyl Ether ND ND <.5 ND ND <.5 ND ND <.5 ND ND <.5 70 70,000
EDB (504.1)ND ND <.5 ND ND <.5 ND ND <.5 ND ND <.5 0 50
Styrene ND ND <.5 ND ND <.5 NA NA <.5 NA NA <.5 70 70,000
Chloroform ND ND <.5 9.6 1.1 2.3 ND ND <.5 ND ND <.5 70 70,000
Bromoform ND ND <1 3 ND <1 ND ND <1 ND ND <1 4 4,000
Chloroethane ND ND <1 ND ND <1 ND .68J <1 ND ND <1 3 3,000
Dibromochloromethane ND ND <.5 4.9 ND 1.05 ND ND <.5 ND ND <.5 0.4 400
Bromodichloromethane ND ND <.5 6.2 ND 1.29 ND ND <.5 ND ND <.5 0.6 NL
Acetone ND ND <25 2.9J ND <25 ND ND <25 ND ND <25 6 6M
Naphthalene ND ND <.5 ND ND <.5 ND ND <.5 ND ND <.5 6 6,000
n-Butylbenzene ND ND <.5 ND ND <.5 ND ND <.5 ND ND <.5 70 6,900
sec-Butylbenzene ND ND <.5 ND ND <.5 ND ND <.5 ND ND <.5 70 8,500
Isopropyl Benzene ND ND <.5 ND ND <.5 ND ND <.5 ND ND <.5 70 25,000
p-Isopropyltoluene ND ND <.5 ND ND <.5 ND ND <.5 ND ND <.5 25 1,700
n-Propylbenzene ND ND <.5 ND ND <.5 ND ND <.5 ND ND <.5 70 30,000
1,2,4-Trimethylbenzene ND ND <.5 ND ND <.5 ND ND <.5 ND ND <.5 400 28,500
1,3,5-Trimethylbenzene ND ND <.5 ND ND <.5 ND ND <.5 ND ND <.5 400 25,000
Naphthalene NA NA NA NA NA NA NA NA NA NA NA NA 6 6,000
2-Methylnaphthalene NA NA NA NA NA NA NA NA NA NA NA NA 30 12,500
Lead NA NA NA NA NA NA NA NA NA NA NA NA 15 15,000
C5-C8 Aliphatics NA NA NA NA NA NA NA NA NA NA NA NA 400 NL
C9-C12 Aliphatics NA NA NA NA NA NA NA NA NA NA NA NA 700 NL
C9-C18 Aliphatics NA NA NA NA NA NA NA NA NA NA NA NA 700 NL
C19-C36 Aliphatics NA NA NA NA NA NA NA NA NA NA NA NA 10,000 NL
C9-C10 Aromatics NA NA NA NA NA NA NA NA NA NA NA NA 200 NL
C11-C22 Aromatics NA NA NA NA NA NA NA NA NA NA NA NA 200 NL
Notes:
NC2LGWQS = North Carolina 2L Groundwater Quality Standard
GCL = Gross Contaminant Level
NS-FP= Not sampled; Free Product
NS = Not Sampled
NA = Not Analyzed for This Compound
µg/l = micrograms per liter = ppb (parts per billion)
J-Value = Estimated value between laboratory reporting limit and method detection limit
Value exceed NC2LGWQS
Value exceeds GCL
6200B
610
TABLE 4: SUMMARY OF GROUNDWATER ANALYTICAL RESULTS (WATER-SUPPLY WELLS)
6010B
MADEP VPH/EPH
NC2LGWQS GCLWSW-0460 WSW-9974 WSW-2242 WSW-1737
KODELL'S GROCERY
WESTFIELD, NC
NCDENR INCIDENT # 12330
ECS PROJECT # 09-24687
SAMPLE ID MW-1 MW-2 MW-3 MW-4
Date Sampled
pH 4.66 4.65 5.10 4.51
Temperature (oC)15.46 16.06 14.63 13.83
Conductivity (mS/cm).164 .036 .167 .073
Dissolved O2 (mg/l)3.12 4.05 3.07 4.71
Turbidity (Observed)ST T T T
NOTES:
TOC = top of casing NT= Not Turbid
mS/cm = milliseimens per centimeter VT= Very Turbid
mV = millivolts ST= Slightly Turbid
°C = degress Celsius
TABLE 5: GEOCHEMICAL MEASUREMENTS
09/19/2014

APPENDIX A
1646 Mail Service Center, Raleigh, North Carolina 27699-1646
Phone: [phone] \ Internet: http://portal.ncdenr.org/web/wm
An Equal Opportunity \ Affirmative Action Employer – Made in part by recycled paper

North Carolina Department of Environment and Natural Resources

Pat McCrory
Governor
John E. Skvarla, III
Secretary
September 30, 2014

TO: Herb Berger
NC UST Section

RE: Health Risk Evaluation
Incident # 12330
Stokes County Board of Education Well Sampling Results
7165 Highway 89 West
Westfield, NC

During this sampling event, three contaminants were detected in the well water. The
standards used to determine if the water is suitable for drinking and cooking are the United States
Environmental Protection Agency’s Maximum Contaminant Levels (MCLs) or, if no MCLs exist,
North Carolina Groundwater Standards (2L).

If any contaminant concentrations exceed applicable standards for using the water for
drinking and cooking, those contaminant concentrations are further analyzed to determine if the
water is suitable for other household uses, such as showering, bathing, washing dishes, flushing
toilets, and hand washing. The chart below compares the detected contaminant concentrations with
the applicable standards:

Sample ID

Contaminant

Concentration (ug/l)*

MCL (ug/l)

2L (ug/l)
795332 Bromodichloromethane 1.29 80**
Chloroform 2.30 80**
Dibromochloromethane 1.05 80**
* The abbreviation ug/l stands for micrograms of contaminant per liter of water and is roughly
equivalent to parts per billion.

** As total trihalomethanes.

RECOMMENDATION: None of the contaminants detected exceeded the applicable water
standards. Therefore, no restrictions on the use of this water are recommended at this time.

David Lilley, Environmental Toxicologist
Division of Waste Management, NCDENR

APPENDIX B

APPENDIX C
Photograph No. 1
View of site from NC HWY 89 looking northwest
Photograph No. 2
View of site Francisco Elementary School across NC HWY 89 from site
Photograph No. 3
View of property adjacent to site with inactive well
Photograph No. 4
View of well sampled from Francisco Fire Department

APPENDIX D

APPENDIX E