HomeMy WebLinkAbout6301_MooreCDLF_LeachateReleaseResults_DIN27083_20161130
Golder Associates NC, Inc. 5B Oak Branch Drive
Greensboro, NC. 27407 USA
Tel: (336) 852-4903 Fax: (336) 852-4904 www.golder.com
Engineering Lic. No. C-2862/Geology Lic. No. C-399
Golder, Golder Associates and the GA globe design are trademarks of Golder Associates Corporation
November 30, 2016 0739615016.300
Ms. Jackie Drummond, Hydrogeologist
North Carolina Department of Environmental Quality
Division of Waste Management - Solid Waste Section
2090 US Highway 70
Swannanoa, NC 28778
828-296-4706
RE: SOIL AND SURFACE WATER SAMPLING AND ANALYSIS REPORT
MOORE COUNTY LANDFILL, PERMIT NO. 63-01
ABERDEEN, NORTH CAROLINA
Dear Jackie:
On behalf of the Moore County, Golder Associates NC, Inc. (Golder) is submitting this summary of soil
sampling results related to a leachate release at the Moore County construction and demolition (C&D)
Landfill that occurred on October 19, 2016 after heavy rains fell at the site. The North Carolina
Department of Environmental Quality (NCDEQ) was notified of the release on October 20, 2016, within
the required 24-hour timeframe. In response to the breakout, the landfill employees blocked off the ditch
downgradient of where the leachate breakout occurred to contain the release within the limits of waste.
The ditch was then excavated below the leachate release area to form a temporary containment trench
within the limits of waste to capture the liquid.
On Friday October 21, 2016, approximately 1800 gallons were removed from the trench via vacuum truck
and an additional approximately 1200 gallons are currently being stored within the trench. The liquid
removed from the trench was disposed of at the local publicly-owned treatment works (POTW). Based on
site observations, some of the liquid from the release flowed along a ditch along the access road and
discharged to Sediment Pond 2. Site personnel verified that Sediment Pond 2 did not discharge and the
liquid was contained within the pond during this event.
As proposed in the Sampling Plan, which was approved to the NC DEQ on October 26, 2016, three soil
samples were collected at the locations shown on the attached Soil and Surface Water Sampling Location
Map (Drawing 1). A surface water sample was not collected from the sediment pond as originally
proposed in the Sampling Plan as the sediment pond was dry during the sampling event conducted on
October 31, 2016.
As proposed in the approved Sampling Plan, soil samples were collected from two places along the
bottom of the drainage ditch along the access road, immediately upgradient of Sediment Pond 2. A
background soil sample was also collected outside the potential area of disturbance to provide
background data for naturally occurring metals (SB-1). The soil samples were collected using a hand
auger. The samples were shipped to Environmental Conservation Laboratories (ENCO) of Cary, NC
under chain-of-custody control. Soil samples were analyzed for the NC Appendix I metals and volatile
organic constituents (VOCs) and pH. The analytical results are summarized in Table 1 and the laboratory
report, which are included as attachments.
Soil sample results were compared to the NC DEQ Inactive Hazardous Sites Branch, Preliminary Soil
Remediation Goals (PSRG) Table’s Preliminary Residential Health-Based Remediation Goals,
Preliminary Industrial Health-Based Remediation Goals, and Protection of Groundwater Soil Remediation
Goals (Table 1). As presented, arsenic was detected at concentrations above the residential PSRG in
soil sample SB-2 and above the residential and industrial PSRGs in soil sample SB-3. Thallium was
detected at estimated concentrations above the residential and the protection of groundwater PSRGs in
SB-1 and SB-3. Vanadium was detected at concentrations above the protection of groundwater PSRG in
Ms. Jackie Drummond, Hydrogeologist November 30, 2016
NC DEQ DWM, Solid Waste Section 2 0739615016.300
SB-2 and SB-3. Toluene was also detected at concentrations well below the PSRGs at each soil sample
location including the background sample.
As each of these constituents were detected in the background sample (i.e., SB-1) at similar
concentrations to the ditch samples, the detections above the PSRG standards are believed to be due to
natural variations in soil present at the facility. To further support this contention, data presented in the
November 2003 U.S. Environmental Protection Agency (EPA) document “Guidance for Developing
Ecological Soil Screening Levels” indicate that mean metals concentrations in NC soils are consistent
with the types and concentrations detected in the soil samples from the site, where data are available.
This document presents mean soil metal background concentrations for each state including NC in
milligrams per kilogram (mg/kg); the NC values for arsenic, thallium, and vanadium are presented below
for reference (thallium is not available):
Constituent Units
Mean Soil Metal
Concentrations
in NC
SB-1
(Background)
SB-2
(Ditch 1)
SB-3
(Ditch 2)
Arsenic mg/kg 4.8 0.384 J 1.22 3.4
Thallium mg/kg 14* 0.514 J ND 0.958 J
Vanadium mg/kg 107 2.70 7.56 19.6
Notes: J = estimated concentration below the laboratory method reporting limit
ND = not detected above the laboratory detection limit
--- = data not available
*USGS data point C-143589 the closest available sediment sample from the USGS National Geochemical Survey
Database. Thallium was not analyzed as part of the EPA document “Guidance for Developing Ecological Soil Screening
Levels”.
Based on the background soil metals data, the metals concentrations reported in soil samples from the
Moore County Landfill are generally within mean natural background concentrations for soil, which
supports the contention that the metals are naturally occurring. Although some of the concentrations in
site soil samples are higher, this is expected due to the large range of anticipated concentrations and site-
specific geologic and hydrogeologic factors that would impact concentrations. This is additionally
supported by historical detections of arsenic in samples from surface water monitoring points and
groundwater monitoring wells at the facility during the semi-annual water quality monitoring events.
Additionally, the flow path sample may be susceptible to runoff from trash hauling trucks and other site
equipment, and elevated metals may be attributable to sources other than the leachate release.
As presented, one NC Appendix I VOC was detected in one or more soil samples at quantifiable
concentrations that are below their respective residential, industrial, and protection of groundwater PSRG.
Toluene was detected at a quantifiable concentration in samples from SB-1, SB-2, and SB-3. Because
toluene was detected at the upgradient sampling location, it appears to be unrelated to leachate impacts.
Methylene chloride was also detected at an estimated concentration in SB-3. Methylene chloride is a
common laboratory contaminant and the detections may be unrelated to site conditions. Because these
concentrations are relatively low and well below the residential, industrial, and protection of groundwater
PSRGs, no further action is recommended.
Based on the information presented above, the soil samples do not indicate a significant residual impact
from the leachate release. The prompt abatement response actions taken by Moore County personnel
appear to have been successful in protecting the environment from the release. There does not appear
to be an immediate threat to groundwater or surface water, and no further action is recommended at this
time. If you have any questions, please contact the undersigned at 336-852-4903.
CATCH
BASIN
CATCH
BASIN
TO GP-9
BACKGROUND
SEDIMENT
POND #2
CONSULTANT
DESIGN
PREPARED
REVIEW
APPROVED
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PROJECT No.Rev.
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PHASE
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MOORE COUNTY LANDFILL
PERMIT NO. 63-01
ABERDEEN, NORTH CAROLINA
MOORE COUNTY
SOIL AND SURFACE WATER SAMPLING LOCATION MAP
PERENNIAL STREAM
INTERMITTENT STREAM
EPHEMERAL STREAM
POND AND WETLAND LIMITS
PROPERTY LINE
APPROXIMATE LIMITS OF WASTE
EXISTING ROAD
MONITORING WELL AND IDENTIFICATION
METHANE PROBE AND IDENTIFICATION
SURFACE WATER MONITORING POINT AND IDENTIFICATION
PRIVATE WELL LOCATION AND IDENTIFICATION
WETLAND AREA
PROPOSED SAMPLING LOCATIONS
LEACHATE RELEASE AREA
LEGEND
NOTES
1. PROPERTY BOUNDARY SURVEY BY JAMES L. WRIGHT DATED NOVEMBER 1984. ITS LOCATION
IS RELATIVE TO TOPOGRAPHY APPROXIMATE BY HDR ENGINEERING, INC.
2. MONITORING WELLS MW-1 THROUGH MW-5 SURVEYED JUNE 1987 BY S&ME, INC. MONITORING
WELLS MW-6 THROUGH MW-16 SURVEYED APRIL 1995, SEPTEMBER 1996, AND APRIL 2003 BY
HDR ENGINEERING INC./ ED BUCKNER RLS APRIL 17, 2015.
SITE LOCATION MAP
NOT TO SCALE
SITE LOCATION
0
FEET
200 400
SCALE
November 2016 1 of 1
TABLE 1
Summary of Detected Constituents in Soil Samples
Moore County Landfill, Permit No. 63-01
0739615016.300
CAS No:Analyte:Units:Preliminary Residential Health-
Based Remediation Goals:
Preliminary Industrial Health-
Based Remediation Goals:
Protection of Groundwater
Soil Remediation Goals:
7440-36-0 Antimony, Total mg/kg dry 6.2 94 0.9 < 0.414 0.478 J < 0.446
7440-38-2 Arsenic, Total mg/kg dry 0.68 3.00 5.80 0.384 J 1.22 3.4
7440-39-3 Barium, Total mg/kg dry 3000 44000 580 1.72 3.44 1.4
7440-47-3 Chromium, Total mg/kg dry 24000 100000 360000 1.64 3.52 8.4
7440-48-4 Cobalt, Total mg/kg dry 4.6 70 0.9 < 0.103 0.127 J 0.148 J
7440-50-8 Copper, Total mg/kg dry 620 9400 700 0.483 J 1.84 4.43
7439-92-1 Lead, Total mg/kg dry 400 800 270 1.86 2.64 3.61
7440-02-0 Nickel, Total mg/kg dry 300 4400 130 0.482 J 0.432 J < 0.401
7782-49-2 Selenium, Total mg/kg dry 78 1160 2.1 < 0.424 0.586 1.08
7440-22-4 Silver, Total mg/kg dry 78 1160 3.4 < 0.103 < 0.108 0.455 J
7440-28-0 Thallium, Total mg/kg dry 0.156 2.4 0.28 0.514 J < 0.529 0.958 J
7440-62-2 Vanadium, Total mg/kg dry 78 1160 6 2.70 7.56 19.6
7440-66-6 Zinc, Total mg/kg dry 4600 70000 1200 4.91 < 1.19 < 1.23
75-09-2 Methylene Chloride mg/kg dry 57 640 0.023 < 0.0026 < 0.0028 0.0028 B
108-88-3 Toluene mg/kg dry 818 818 5.5 0.0043 0.0028 0.0057
--pH S.U.------8.2 5.0 5.1
Key:
Result = Exceeds the Residential PSRG
Result = Exceeds the Industrial PSRG
Result = Exceeds the Protection of Groundwater PSRG
Result = Exceeds the Residential and Protection of Groundwater PSRG
Result = Exceeds the Residential and Industrial PSRG
Notes:
1.) PSRGs from "Inactive Hazardous Sites Branch Preliminary Soil Remediation Goals (PSRG) Table - dated October 2016
2.) J = J-Flag or estimated value above the method detection limit but below the report limit.
3.) B = B-Flag or blank flag which indicates the consituent was detected in one of the blank samples.
SB-1
(Background)
SB-2
(Ditch 1)
SB-3
(Ditch 2)
G:\PROJECTS\Moore County\2016 Leachate Release\Tables.xlsx
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GOLDER ASSOCIATES NC, INC.
QUALITY ASSURANCE & QUALITY CONTROL
LABORATORY DATA REVIEW
Page 1 of 3
Project Name: Moore County Landfill – Leachate Release Sampling
Project Reference Number: 073-9615016.100
Sampling Event Date: October 31, 2016
Review Date: November 21, 2016 Initials: BSD
Report #: CZ16127
Person(s) performing the review are to initial each item on this form as acknowledgement
of data acceptance, or as acknowledgement of a review issue. In the case of the latter, a
brief explanation should follow the applicable item.
Golder Associates Inc. has reviewed the laboratory certificates of analysis, chain-of-custody form,
and laboratory provided sample group quality assurance and quality control data for the above
referenced sample group to identify potential bias or inaccuracy, in general accordance with the
following United States Environmental Protection Agency documents:
Region III Modifications to Functional Guidelines for Organic Data Review Multi-Media,
Multi-Concentration, September 1994;
Region III Modifications to the Laboratory Data Validation Functional Guidelines for
Evaluating Inorganic Analyses, April 1993; and
Laboratory Data Validation Functional Guidelines for Evaluating Inorganic Analyses, July
1998.
COMPLIANCE ANALYTE LIST(S) (check all that apply)
NC Closed Facility/C & D List
NC Appendix I
NC Appendix I + Detects
NC Appendix II
NC Subtitle D Leachate List
Other: Soil NC Appendix I VOCs and Metals
1.0 CHAIN OF CUSTODY (COC) REVIEW
BSD COC was properly signed by all parties.
BSD Correct project name and number are on the form.
BSD Sample receipt condition at laboratory was acceptable.
BSD Each sample and blank submitted for analysis appears in the report.
2.0 SAMPLE HOLDING TIMES
BSD Holding times for extraction and/or analysis were met for each analytical
Method (see below for reference).
GOLDER ASSOCIATES NC, INC.
QUALITY ASSURANCE & QUALITY CONTROL
LABORATORY DATA REVIEW
Page 2 of 3
Review Criteria
Method Analytes Holding Time
SW-846 Method 8260 and 8011 VOCs 14 days
SW-846 Methods 8270, 8080,
8081, 8082, and 8151
SVOCs, PCBs,
pesticides and
herbicides
7 days for extraction, 40 days
from extraction for analysis
SW-846 Methods 6000 and 7000
Series
Metals except mercury 6 months (no temperature
requirements)
SW-846 Method 7470 Mercury 28 days
SM18 4500-S2 D Sulfide 7 days
SW-846 Method 9010 Cyanide 14 days
EPA Method 300 Nitrate/Sulfate 48 hours/28 days
EPA Method 405.1 BOD 48 hours
EPA Method 410.4 COD 28 days
EPA Method 365.4 Phosphorous 28 days
3.0 LABORATORY QUALITY CONTROL REVIEW
BSD Laboratory analyzed at least one internal blank for each method, where applicable.
BSD Laboratory blank is interference-free.
BSD Surrogate recoveries are provided for each analytical method, where applicable.
BSD Surrogate recoveries for each method are within the acceptable limits (i.e., at least
50% of the surrogates were within range).
BSD MS/MSD/LCS data results are provided for each analytical method.
BSD MS/MSD/LCS recoveries for each method are within the acceptable limits (i.e., at least
1 of the 3 were within range).
Antimony, arsenic, and selenium recorded spike recoveries outside
acceptance limits for the MS and/or MSD. The batch was accepted based on
acceptable LCS recoveries.
4.0 ANALYTE LISTS/METHODS
BSD The proper number of constituents are present for each analyte list as identified above
(including detects where applicable).
BSD Proper EPA SW-846 analytical methods were used for analysis.
Notes:
5.0 DATA REPORTING
BSD All analytical reporting associated with the event was performed by the contracted lab.
BSD Trip, field and/or equipment, and laboratory blank results have all been reported. All
detects for blanks are listed below by constituent. All laboratory method blanks, if any,
have been ‘flagged’ with a ‘B’ where detected in other samples as appropriate and a
laboratory narrative was provided. If the sample was flagged by the laboratory and is
not within 5X of the concentration in the blank (or 10X for commonly detected
laboratory contaminants-acetone, methylene chloride and phthalates), list below with
GOLDER ASSOCIATES NC, INC.
QUALITY ASSURANCE & QUALITY CONTROL
LABORATORY DATA REVIEW
Page 3 of 3
explanation if flags should be removed. If flags need to be added for samples, also
list below.
Lab Blank (6K09035-BLK1):
o Lead @ 0.120 J ug/L (No B-Flags)
Lab Blank (6K11012-BLK1):
o Methylene chloride @ 0.010 ug/L (B-Flag need for SB-3)
BSD It is clear from the laboratory report that samples have or have not been diluted during
analysis, and if the samples have been diluted, the result is reported as a multiple of
the dilution (e.g., a sample diluted 10x resulting in an analytical detection of 1.0 should
be reported as 10). Those that have been diluted are listed below with the dilution
factor.
Dry weight correction shown as dilution.
BSD The report provides the reporting limit for each constituent.
BSD The results were reported at or below their proper reporting limits (e.g., NC Solid Waste
Section RLs). Those that are not reported correctly are listed below (by constituent)
with the proper reporting limit listed beside them. State if the reporting limit error is
due to dilutions.
BSD No inorganic or organic constituents were reported above their respective NC 2L
Drinking Water Standards or Groundwater Protection Standards in wells, surface
points, or field/equipment/trip blanks.
Arsenic was detected above the residential PSRG in SB-2
Arsenic was detected above the residential and industrial PSRG in SB-3
Thallium was detected above the residential and protection of GW PSRG in
SB-2 and SB-3.
Vanadium was detected above the protection of GW PSRG in SB-2 and SB-3
NA No quantifiable inorganic or organic constituents were detected in a well or surface
water point at concentrations outside of their historical range (more than 5X previous
concentrations or first-time detections).
NA Other report issues/Communications with laboratory/etc.: