9233T_Wake_EastWakeTransfer_CountyLeachateSoilSamplingPlan_FID1736107_20220928

Smith
5400 Glenwood Avenue, Suite 400
Raleigh, North Carolina 27612
tel: [phone]
September 28, 2022
Ms. Jaclynne Drummond
North Carolina Department of Environmental Quality
Division of Waste Management
Solid Waste Section
2090 U.S. 70 Highway
Swannanoa, North Carolina 28778
Subject: Wake County — East Wake Transfer Station
820 Corporation Parkway
Raleigh, Wake County, North Carolina
Permit # 9233T-TRANSFER-2008
Leachate Release Soil Sampling Plan
Dear Ms. Drummond:
CDM Smith Inc. (CDM Smith), on behalf of Wake County (County), is submitting this Leachate Release
Soil Sampling Plan in response to the September 20, 2022, Notice of Violation letter from the Solid
Waste Section (SWS). On September 8, 2022, the SWS completed an inspection of the East Wake
Transfer Station (Site), located in Raleigh, Wake County, North Carolina. The Site was found to be in
violation of several North Carolina Solid Waste Statues and Rules for leachate impacted soils, including
15A NCAC 13B .0405 (b) and (c) and .0104 (a) through (d). To remain in compliance, the County must
submit a sampling plan to evaluate soil for contamination within 5 days of the SWS letter. However,
based on conversations with the SWS, a plan dated no later than September 30, 2022, was approved.
CDM Smith and the County therefore provide the following sampling plan to assess the leachate
impacted soil. The sampling plan was prepared in accordance with the Leachate Release Sampling and
Analysis Guidelines (SWS, 2021). A Site map is provided in Figure 1.
Release Incident
The Site was found to be in violation of 15A NCAC 136.0405 (b) for improper leachate collection
systems. Due to clogged leachate drains in the loading bay, accumulated leachate and soil were tracked
out to the access road. Waste that had fallen out of transfer vehicles was also located on and area of soil
adjacent to the loading bay trailer cover area.
The Site was also found to be in violation of 15A NCAC 13B .0405 (c) for temporary waste storage.
Transfer trailers located on the access road waiting to enter the tipping floor were leaking leachate,
which was running down the access road and accumulating in a low-lying area of the road. Leaking
rolling bin containers containing waste were also stored on an area of soil adject to the access road.
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WATER + ENVIRONMENT +TRANSPORTATION + ENERGY + FACILITIES

Smith
Ms. Jaclynne Drummond
September 28, 2022
Page 2
The Site was found to be in violation of 15A NCAC 13B .0104 (a) through (d) for solid waste storage.
Plastic rolling waste carts containing waste and leachate were stored on an uncovered area of soil
adjacent to the access road. The area was covered with waste and leachate impacted soil. All areas of
impact are shown on Figure 1.
Soil Sampling Plan
To evaluate the extent of potential leachate contamination at the Site, 13 soil samples (i.e., BG-1 and S-1
through -12) will be collected at the locations shown on Figure 1. Note that the area located on the
southwest portion of the property will be investigated by the City of Raleigh. An excavator will be used
to remove soil visually impacted by leachate. Leachate impacted soils and soils beneath the impacted
soil will be screened for total volatile organic compounds (VOCs) using a photoionization detector. Grab
soil samples will be collected from 1 to 2 feet below the impacted soil at each location using an
excavator and analyzed for Appendix I VOCs by U.S. Environmental Protection Agency (EPA) Method
8260D, 1,4-dioxane by EPA Method 8260D selective ion monitoring, Appendix I metals by EPA Method
6010B and 7471B, total phosphorous by EPA Method 365.4, nitrate and sulfate by EPA Method 9056A,
and pH by EPA Method 9045. No composite samples will be collected.
All excavated soils will be hauled to the South Wake Landfill for disposal. No additional testing
requirements are anticipated.
Schedule
Soil sampling activities will be completed within 7 days of approval of the sampling plan by the SWS. A
draft report will be submitted to the SWS within 10 business days of receiving the analytical data from
the laboratory. The report will include tabulated soil analytical results, a Site map with sample locations
and areas of contamination, and will address the extent of contamination, any imminent hazard to
public health and safety, and any recommended actions to mitigate those hazards. Soil analytical results
will be compared to the North Carolina Department of Environmental Quality's Residential Health Based
and Protection of Groundwater Preliminary Soil Remediation Goals.
iD

Smith
Ms. Jaclynne Drummond
September 28, 2022
Page 3
If you have any questions or require further explanation, do not hesitate to contact me by email to
[e-mail] or by phone at [phone].
Sincerely,
J-10��M -
Janelle B. Farley, P.G.
CDM Smith Inc.
cc: Tim Davis, SWS
Roy Baldwin, Wake County
John Roberson, Wake County
iD

S-1� 5-2 5-3
Fnsfer Trailer Loading Bay
54 s-s's�,.4 .
Soil Sample Location
Leachate Impacted Ama
— Parcel Boundary
Notes:
Map Oafs Source: M21 Amer Photograph, Wake County, North Carolina One Map
OSpmith
Scale in Feet
0 100 200
SA
5-10
r,-�
7
it
Figure 1: Site Map
East Wake Transfer Station
Raleigh, Wake County, North Carolina
Facility Permit Number 9233T-TRANSFER-2008