PRLF730_20231208_RI-3&4_WorkPlan

2725 East Millbrook Road
Suite 121
Raleigh, NC 27604
Tel: [phone]
Fax: [phone]
www.atcassociates.com
N.C. Engineering License No. C-1598

December 8, 2023

Mr. Sean Gallagher
North Carolina Department of Environmental Quality
Division of Waste Management,
Superfund Section – Special Remediation Branch
Pre-Regulatory Landfill Unit
1646 Mail Service Center
Raleigh, North Carolina 27699-1646

RE: Work Plan and Cost Proposals for Task Orders 730RI-3 and 730RI-4
Elon College LDFL
Elon, Alamance County, North Carolina
ID No. NONCD0000730
State Contract No. N17012

Dear Mr. Gallagher:

ATC Associates of North Carolina, P.C. (ATC) is submitting this work plan and cost proposal in
response to the tasks discussed during the recent status review meeting on November 16, 2023.
This work plan outlines the proposed scope of work for Task Orders 730RI-3 and 730RI-4.

1.0 GENERAL PROCEDURES

All field work outlined in this work plan will be in accordance with ATC’s approved Standard
Operating Procedures (SOPs) and Quality Assurance (QA) Manual dated April 17, 2013 and the
Unit’s March 2022 Guidelines for Addressing Pre-Regulatory Landfills and Dumps. In addition,
all employees and subcontractors engaged in intrusive field activities will be trained in accordance
with Occupational Safety and Health Administration (OSHA) Hazardous Waste Operations and
Emergency Response (HAZWOPER) requirements. The following general procedures will be
followed for all field activities detailed in this work plan:

 Before and after photographs will be taken of areas that are disturbed as part of the scope
of work. Photographs of any damage will be provided to the Unit within 48 hours.
 Survey locations will be recorded with a Global Positioning System (GPS) unit in latitude
and longitude by decimal degrees to the seventh order using the North American Datum of
1983 (NAD83) format. Coordinates will also be reported in latitude and longitude using
WGS 84 format.
 Updates will be provided to the Unit on a daily basis during field activities via email and/or
telephone.
 A copy of Appendix D of the Unit Guidelines (March 2022) has been provided to the
laboratory as a reference for the required analytical parameters. The groundwater samples
will be submitted to a North Carolina certified laboratory and analyzed for the following
ID No. NONCD0000730 Task Orders 730RI-3 and 730RI-4
Page 2
parameters by the most current U.S. EPA Contract Laboratory Program Target Compound
List:
o Volatile Organic Compounds (VOCs) by SW-846 Method 8260
o 1,4-Dioxane by SW-846 Method 8270SIM
o Semi-Volatile Organic Compounds by SW-846 Method 8270
o Inorganic hazardous substances by SW-846 Method 6020 (antimony, arsenic,
barium, beryllium, cadmium, chromium, cobalt, copper, lead, manganese, nickel,
selenium, silver, thallium, vanadium, and zinc)

 The soil-gas samples will be submitted to a National Environmental Laboratory
Accreditation Program (NELAP) certified laboratory and analyzed on standard turnaround
by the following methods:
o VOCs by Method TO-15
o Hydrogen Sulfide by Method 15/ASTM D5504
o Methane by ASTM D1946

 A completeness check of laboratory analytical reports will be performed. If issues are
identified, ATC will work with the laboratory to attempt to resolve issues. Once issues are
resolved, ATC will provide documentation of the completeness check with a statement that
the data is usable.

 Sample collection procedures will also follow the latest methods published by the
Environmental Protection Agency (EPA) Region IV Science and Ecosystem Support
Division (SESD).

2.0 SCOPE OF WORK

Task Order 730RI-3 – Contaminant Delineation RI Activities

Subtask A – Work Plan Preparation

Under this subtask, ATC will prepare a work plan and cost proposal for the requested scope of
work. This submittal is intended to fulfill this task. Refer to subsequent sections of this submittal
for details regarding the proposed scope of work.

Subtask B – Groundwater

ATC will mobilize to the site to collect groundwater samples from seven existing groundwater
monitoring wells. Prior to sample collection, static water levels will be gauged using an electric
water level meter. Groundwater purging and sampling will be conducted using a peristaltic pump
and dedicated Teflon tubing. A field water quality instrument and flow-through cell will be used
to monitor pH, specific conductance, conductivity, and temperate at three to five minute intervals
during purging. A portable turbidity meter will be used to monitor turbidity at three to five minute
intervals. Purging will continue until pH and specific conductance stabilize. In addition, if any of
the wells purge dry prior to stabilization, ATC will allow the well to recover sufficiently and then
collect the sample without additional purging. If samples are highly turbid, samples for metals
analysis will be allowed to sit for several minutes prior to decanting into sample containers. If
decantation is performed, ATC will also collect post-decantation turbidity readings. Samples for
ID No. NONCD0000730 Task Orders 730RI-3 and 730RI-4
Page 3
other analyses will be immediately decanted into sample containers. The samples will be submitted
for laboratory analysis using the methods described above.

ATC will collect one duplicate sample and one equipment blank per day (estimated two days of
sampling) for a total of 11 samples. Additionally, a trip blank will be included with each shipment
of VOC samples. Analysis of trip blanks will not be charged. Investigation-derived waste (IDW)
will be spread in the vicinity of the borings.

Subtask C – Landfill Gas Probes

ATC will mobilize to the site to collect samples from two existing landfill gas probes and six existing
soil gas probes. Prior to sample collection, a shut-in test will be conducted on the sampling process
lines to ensure an air-tight connection by applying vacuum pressure to the lines and observing for
vacuum pressure loss. Once the shut-in test has been completed and determined to pass, differential
pressure readings will be collected prior to purging. Samples will be collected at a flow rate of less
than 200 ml/min. The TO-15 and methane samples will be collected in 1-liter stainless steel batch
certified Summa canisters, while the ASTM D5504 samples will be collected in a Tedlar bag (two
Tedlar bags per sample). One duplicate sample will also be collected for each day of sampling (two
days estimated) for a total of ten samples. An additional summa canister and flow regulator is included
in the cost as a backup.

After the landfill gas samples have been collected, ATC will initiate landfill gas screening activities
at both the landfill and soil gas probes. To perform the screening, ATC will use field instruments to
measure target landfill gases and other parameters. To complete the screening, the instrumentation
will be connected using ¼-inch Teflon® tubing either directly to the landfill gas probe or tubing
already installed inside of the permanent probes. The target parameters and type of instruments to be
used for the screening are as follows:
 Methane – GEM 5000+
 Oxygen – GEM 5000+
 Carbon dioxide – GEM 5000+
 Hydrogen sulfide – GEM 5000+
 VOCs – MiniRAE Photoionization Detector (PID)
 Barometric pressure – GEM 5000+ (collected at least every hour)
 Temperature and humidity – GEM 5000+ and Hygrometer (collected at least every hour)

The instrumentation listed above meets the detection limit requirements specified by the Unit.
ATC will calibrate each instrument in the field per the manufacturer’s specifications and will
conduct bump tests before, periodically during, and after the landfill gas survey to insure proper
calibration. Calibration procedures will be documented in the field as well as information detailing
the equipment manufacturer, model number, serial number, date of factory calibration and
maintenance, set up parameters, measurement units, detection limits, and types of calibration gas
and their expiration dates. In addition, field logs will include the name of the person conducting
the evaluation, a description of weather conditions, and potential forms of cross-contamination, as
well as hourly ambient temperature, humidity, and barometric pressure readings.

ID No. NONCD0000730 Task Orders 730RI-3 and 730RI-4
Page 4
Subtask D – Project Management

This subtask includes labor for scheduling personnel, coordination with field personnel, property
owners, and the Unit, evaluation of data collected in the field and development of site-specific
sampling forms and logs. ATC will also coordinate access with the property owners.

Task Order 730RI-4 - Report

This Task Order is for the compilation of a report once the field work is completed for Task Order
730RI-3. The report will include one or more CAD drawn site maps showing the locations of the
monitoring wells, landfill and gas probes, with background topographic contours in light grey.
Additional maps will show media exceedances (if detected). In addition, the report will include
tables summarizing GPS coordinates of the sampling locations, and analytical data. Analytical data
from this event will be entered into the EQuIS program for distribution to the Unit’s database.
ATC will also enter both the new groundwater and soil gas data into the Risk Calculator both
residential and non-residential scenarios, for each monitoring well and gas probe and on a site wide
basis Lastly, boring logs, field notes including calibration logs, field readings, and procedures will
also be included as appendices.

Staffing and Schedule

The following tables detail our proposed staffing and schedule for the project.

STAFFING
Level Proposed Staff
Senior Project Manager Larry George, P.G.
Project Manager Tim Grant, P.G.
Staff Scientists Laura de Sousa, G.I.T., Aaron Springer, Garrett
Lewis, Noah Kelly
Note: Technician, CAD, and administrative level staff not specified.

Task Order 730RI-3 – Proposed Field Services Schedule & Level of Effort
Schedule Subtask
ATC On-Site Staff Others
On-Site Project/
PM
Staff Tech
Week 1, Days 1-2 Subtask B –Groundwater
Sampling
1 1
Week 1, Days 3-4 Subtask C – Gas Probe Sampling
and Screening
1 1

The field work will begin within three weeks following approval of this work plan by the Unit,
assuming subcontractor availability. Field activities will require one week, then laboratory
analyses will require an additional two to three weeks. ATC requests three weeks to review lab
data, request changes if needed, and compile tables and figures. Per this schedule, a package which
includes field notes, sample sheets, laboratory reports, tables, and figures will be provided to the
Unit within 10 weeks of authorization to proceed. The final report will be submitted within two
weeks following Unit approval of the initial submittal.
ID No. NONCD0000730 Task Orders 730RI-3 and 730RI-4
Page 5
Estimated Costs

Cost proposal spreadsheets showing the breakdown of estimated costs for the Task Orders are
included under separate cover.

If you have questions or require additional information, please do not hesitate to contact Tim Grant
at [phone].

Sincerely,
ATC Associates of North Carolina, P.C.

Aaron D. Springer Timothy D. Grant, P.G.
Project Scientist Project Manager

Lawrence M. George, P.G., R.S.M.
Principal / Senior Project Manager