9214_HollySpringsCDLF_SoilAssessmentPlan_DIN25993_20160421

Environmental Engineers, Scientists & Consultants
2211 West Meadowview Rd.
Greensboro, NC 27407
tel: [phone]
fax: [phone]
www.JoyceEngineering.com

April 21, 2016

Mr. Matt Einsmann, P.E.
Environmental Manager
Republic Services, Inc.
5111 Chin Page Rd.
Durham, NC 27703

RE: Soil Assessment Plan
BFI-Holly Springs Disposal, Inc.; Permit No. 9214-CDLF-1993.
JOYCE Project No. 895.1602.12, Task No. 02

Dear Mr. Einsmann:

Joyce Engineering (JOYCE) submits this Soil Assessment Plan for the closed Holly
Springs C&D landfill, which Republic operates under Solid Waste Permit Number 9214-CDLF-
1993. This Soil Assessment Plan is in response to a Facility Compliance Inspection Report
issued by the North Carolina Department of Environmental Quality (DEQ) on March 7, 2016.

Background
The Holly Springs Landfill is located at 4300 Holly Springs-Apex Road in Holly Springs,
North Carolina. The facility is a closed C&D landfill which stopped receiving waste in
December 2006, and closure certification was completed in January 2012. On March 1, 2016,
Republic contacted the North Carolina Department of Environmental Quality (NCDEQ),
Division of Waste Management (DWM), Solid Waste Section (SWS) to self-report a leachate-
like material release. DWM conducted a site compliance inspection on March 7, 2016, and
issued an Inspection Report, which described a possible release of leachate (including soil
discoloration) from an area of apparent erosion in the northwest section of Cell 7, near the
perimeter stormwater ditch.

The Inspection Report called for sampling of the soil and surface water in the vicinity of
the apparent release and requested a sampling plan be submitted to the SWS. Surface water
sampling has already been conducted and the results will be submitted in a separate report;
therefore, this plan focuses on soil sampling.

Apparent Release Area
According to the March 7, 2016 Inspection Report, the apparent release area is the
perimeter stormwater ditch near the northwest section of Cell 7. The ditch runs to a sediment
trap located approximately 200 feet downgradient of the apparent source of the release. The trap
has been dry during recent site visits; however, some standing water was observed in the ditch
Ms. Jackie Drummond
April 21, 2016
Page 2 of 3

flowing from the sediment trap. Discharge from the ditch (if there ever is any) flows southwest
to a creek which runs between Cell 6 and Cell 7 of the closed landfill. The creek is a tributary to
Oak Creek, located approximately one mile northwest of the landfill property. Oak Creek flows
to Harris Lake.

Proposed Soil Sample locations
In order to document the extent of possible leachate constituents in the soil, we propose
collecting soil samples from four locations, three in the apparent release area plus one upgradient
background sample. Figure 1 shows the proposed sample locations on a portion of the facility
site plan. One soil sample will be collected from the perimeter ditch in the area of discolored
soil nearest the supposed source of the apparent release, and two additional samples will be
collected from the perimeter ditch at intervals of 25-50 feet between the possible source area and
the sediment trap. The proposed locations shown on Drawing 1 are approximate and may be
adjusted in the field based on observed discolored soil or other evidence of release. The
background sample will be collected from a location upgradient of the apparent release area. At
each location, we will collect one soil sample from a depth of 12-24 inches below the ground
surface.

Soil Sampling Protocol
All sampling will be conducted under the supervision of a licensed professional geologist
and will be conducted by trained field personnel. The soil samples will be collected using a
stainless-steel hand auger. The sampling equipment will be thoroughly decontaminated before
sampling and between samples. The decontamination procedure will include the following
steps:
 Wash the equipment with a solution of Alconox, or similar phosphate-free detergent,
using a brush to remove particulate matter and surface films;
 Rinse with organic-free water or distilled water twice;
 Air dry on aluminum foil; and
 If not used immediately, wrap equipment in aluminum foil.

Personnel will wear disposable latex or nitrile gloves when handling soil samples. All
samples will be placed in laboratory-prepared sample containers (e.g. Terra Core samplers, jars,
etc.) and put immediately into a cooler with ice for transport to the laboratory.

Soil Analyses
The samples will be transported to a North Carolina-certified laboratory under chain-of-
custody control for analysis. The soil samples will be analyzed for the NC Appendix I list of
leachate constituents, including metals by EPA Method 6010, and volatile organic compounds
(VOCs) by EPA Method 5035/8260. The soil samples will also be analyzed for pH.

Ms. Jackie Drummond
April 21, 2016
Page 3 of 3

Reporting
A letter report presenting the results of the soil assessment will be submitted to the
NCDEQ-SWS. The report will include a description of the soil-sampling event, a map showing
the locations of the soil samples, a summary of the analytical results, the complete laboratory
analytical report and chain-of-custody, and a discussion of the results. The report will compare
the analytical results to the NCDEQ Inactive Hazardous Sites Branch Preliminary Soil
Remediation Goals (PSRGs), including both the Residential Human Health PSRGs and the
Protection of Groundwater PSRGs.

Soil samples will be collected upon of NCDEQ-SWS approval of this Soil Assessment
Plan. Soil samples will be submitted to a NC-certified laboratory within analytical method hold
times. After receipt of the final laboratory analytical report, the Soil Assessment Report will be
submitted to you for review, and upon your approval, it will be submitted to the NCDEQ-SWS
electronically. If you wish to have a hard copy of the report, we will be happy to provide it upon
your request.

Please feel free to contact me at [phone] if you have any questions or comments
regarding this plan. Thank you.

Sincerely,
JOYCE ENGINEERING

Van Burbach, Ph.D., P.G
Technical Consultant

Attachment: Drawing 1

Attachment

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APPROVED
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DESIGNED
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DATE REVISIONS AND RECORD OF ISSUE BYNO APPCK
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All rights reserved.
Ó Joyce Engineering, Inc.
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L:\Republic NC\Holly Springs\2016 soil sample locations\2016 soil sample locs.dwg Layout=GW map
2211 W. MEADOWVIEW ROAD
GREENSBORO, NC 27407
PHONE: [phone]
NC CORP LIC: C-0782
8
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HOLLY SPRINGS CLOSED C&D LANDFILL
WAKE COUNTY, NORTH CAROLINA
2016
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PERMIT NO. 92-14
SOIL SAMPLING LOCATIONS
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