HomeMy WebLinkAbout22002_Overture Cary_AWP_20190218Mid Atlantic
Engineering & Environmental Solutions
February 18, 2019
Mr. Kelly Johnson, PG
NC Brownfields Program
NC Department of Environmental Quality
Division of Waste Management
Mail Service Center 1646
Raleigh, NC 27699-1646
Subject: PHASE II WORK PLAN
OVERTURE CARY
3612 & 3624 DAVIS DRIVE
CARY AND MORRISVILLE, WAKE COUNTY, NORTH CAROLINA
BROWNFIELDS PROJECT NO.: 22002-18-092
MID -ATLANTIC PE LICENSE: F-0967
REVISION NO.: 0
MID -ATLANTIC JOB NO. OOOR3021.01
Dear Mr. Johnson:
409 Rogers View Court
Raleigh, NC 27610
office 919.250.9918
facsimile 919.250.9950
MAAONLINE.COM
Mid -Atlantic Associates, Inc. (Mid -Atlantic) has prepared this Work Plan for Phase II work to be
conducted at the proposed Overture Cary development located in Cary and Morrisville, North
Carolina. The objective of this Work Plan is to outline environmental assessment activities
required to fill gaps in assessment data at the subject site identified by the Brownfield Program.
INTRODUCTION
The subject site consists of two parcels totaling approximately 12 acres and is located at 3612 &
3624 Davis Drive in Cary and Morrisville, Wake County, North Carolina (Figure 1). The site
contains one vacant residence and includes open and wooded land. A telecommunication tower is
located on the eastern portion of the subject site, but is a set aside property not included with the
Brownfield property. The subject site is assigned Parcel ID Numbers 0745-54-3962 and 0745-44-
9957 according to the Wake County Tax Administration Office.
During a Phase I Environmental Site Assessment (PESA) conducted at the subject site (report
dated December 12, 2017), Mid -Atlantic identified one Recognized Environmental Condition
(REC) subject site. The REC is associated with a confirmed release from a former heating oil
aboveground storage tank at the rear of the house. Staining on the support structures for the AST
and on the wall of the vacant house were observed. Three soil samples were collected in the
EXPERIENCED CUSTOMER FOCUSED INNOVATIVE
Phase II Work Plan
Cary Overture
Cary and Morrisville, North Carolina
February 18, 2019
Page 2
vicinity of the AST supports, and the analytical results confirmed the presence of petroleum
constituents at levels in excess of the NC Action Levels for total petroleum hydrocarbons (TPH)
gasoline range organics and diesel range organics (GRO and DRO).
In addition, a Business Environmental Risk was documented in the December 12, 2017 PESA.
Three double -walled ASTs are present in the bases of the emergency generators used to
power the telecommunications tower. One of the generators is housed inside the enclosed
building and two are mounted on pads within the fenced enclosure. No evidence of a release
was identified during the PESA. The PESA noted that a future release from the ASTs could
potentially impact the subject site; however, the potential for a release is considered remote.
As a part of the eligibility determination process, the Brownfield Program reviewed the December
12, 2017 PESA as well as other information. As a result of that review, the Program identified
environmental assessment data gaps. This Work Plan outlines the activities that will be conducted
to fill the environmental assessment data gaps identified by the Brownfield Program in an email
dated January 14, 2019. On February 11, 2019 Mid -Atlantic submitted a Receptor Survey Report
to the Program as requested in the January 14, 2019 email. The scope of work outlined below
was developed after consulting with the Program on the findings of the receptor survey.
SCOPE OF WORK
In an attempt to address assessment data gaps at the site, Mid -Atlantic proposes the following
scope of work:
• Collect three soil samples from the stained soil identified adjacent to the residence
located on the subject site (Figure 2). Test each sample for the presence of volatile
organic compounds (VOCs) using EPA 8260, semi-VOCs (SVOCs) using EPA 8270
and eight RCRA metals (Table 1).
• Collect one soil sample from an adjacent topographically downgradient location to the
telecommunications tower (Figure 2). The sample will be tested for the presence of
VOCs using EPA 8260, SVOCs using EPA 8270 and eight RCRA metals (Table 1).
• Collect one soil sample in the immediate vicinity of each of the two debris piles identified
during the PESA (Figure 2). Each sample will be tested for the presence of VOCs using
EPA 8260, SVOCs using EPA 8270 and eight RCRA metals (Table 1).
• Collect one background soil sample at a location to be determined based on site
conditions at the time of sampling. The sample will be tested for the presence of eight
RCRA metals (Table 1).
• Construct one temporary groundwater monitoring well in the immediate vicinity of the
stained soil area adjacent to the residence (Figure 2). Collect one groundwater sample
from the temporary well and test the sample for the presence of VOCs using EPA 8260
and SVOCs using EPA 8270 (Table 2).
• Construct one temporary groundwater monitoring well from an adjacent topographically
downgradient location to the telecommunications tower (Figure 2). Collect one
groundwater sample from the temporary well and test the sample for the presence of
VOCs using EPA 8260 and SVOCs using EPA 8270 (Table 2).
Mid. Atlantic
Engineering & Environmental Solutions
Phase II Work Plan
Cary Overture
Cary and Morrisville, North Carolina
February 18, 2019
Page 3
• Abandon the on -site water supply well in accordance with applicable regulations.
• Close the septic system in accordance with applicable regulations, if any.
• Soil cuttings from the temporary well borings will be spread at the site unless
Photoionization Detector (PID) readings indicate that soils are contaminated (see
below). Purge water and decontamination materials will be containerized into 55-gallon
drums for off -site disposal, pending receipt of laboratory analytical results.
• Abandonment of the temporary monitoring wells by a Licensed North Carolina Well
Driller.
• Preparation of a Limited Site Assessment Report to document field activities and provide
analysis of the data collected.
SAMPLING METHODOLOGY
Soil cuttings from the borings for each soil boring and temporary well will be screened using a PID
to evaluate if VOCs are detected in soil during drilling activities. Soil samples will be collected in 5
foot intervals using a GeoProbe macrocore sampler and direct push technology. A portion of each
soil sample will be removed from the sampling device (acetate sleeves from the macrocore
sampler) and placed in a pre -labeled, plastic "ziploc" bag. After several minutes, the gas
contained in the "headspace" or void area within the bag will be screened with a PID. The PID will
also be used for air monitoring in accordance with provisions in the site health and safety plan
(HASP). The soil samples collected for laboratory analysis will be removed from the acetate
sleeve and placed directly into laboratory supplied sample jars.
Soil borings used for construction of temporary monitoring wells will be advanced using a
GeoProbe until the water table is intersected or GeoProbe refusal is encountered. If GeoProbe
refusal is encountered prior to the water table, hollow -stem augers and/or air hammer drilling
methods will then be used to advance the boring and complete the monitoring well installation
activities. Temporary monitoring wells will constructed using Schedule 40 PVC and one -inch
diameter PVC casing with 10 feet of 0.010 inch mechanically -slotted PVC well screen so that the
screen brackets the water table.
Prior to groundwater sample collection, each well will be developed and purged of three to five
standing well volumes or to dryness to remove stagnant water from the well in an effort to collect
samples that are representative of the water quality in the formation surrounding each well.
Purging will be performed with a new, polyethylene bailer dedicated to each well. Samples from
each well will be collected with its dedicated bailer. Following sampling activities, each well will be
abandoned under the direction of a Licensed North Carolina Well Driller.
Guidance documents used for performance of this work include:
Inactive Hazardous Sites Program Guidelines for Assessment and Cleanup (October
2015);
Quality System and Technical Procedures for SESD Field Branches; and
North Carolina Administrative Code Title 15A Subchapter 2C Section 0.100 Well
Construction Standards (October 1, 2009).
Mid. Atlantic
Engineering & Environmental Solutions
Phase 11 Work Plan February 18, 2019
Cary Overture Page 4
Cary and Morrisville, North Carolina
LABORATORY ANALYSIS
Soil and groundwater samples will be submitted to Prism Laboratories (Prism) of Charlotte, North
Carolina, NC Certification Number 402. The soil samples will be analyzed for VOCs, SVOCs and
eight RCRA metals as summarized in Table 1. Groundwater samples will be submitted for
analysis of VOCs and SVOCs (Table 2). Reporting limits and method detection limits will meet
applicable screening criteria including the reporting of J-Flags. Prism will report QA/QC to Level II.
QA/QC
One duplicate soil sample and one duplicate groundwater sample will be collected in the field. The
duplicate samples will be analyzed for VOCs. One trip blank and one equipment rinse blank will
also be analyzed for VOCs only (Table 2). Mid -Atlantic will fill each laboratory provided jar to
ensure the lab will have sufficient sample volume for MS/MSD analysis. The chain -of -custody will
be completed in the field and packed with the groundwater and soil samples. The Mid -Atlantic
field technician will return to the office with the packed cooler which will be picked up by a Prism
courier. The courier will then hand deliver the cooler to the laboratory located in Charlotte, North
Carolina.
INVESTIGATION DERIVED WASTE (IDW) MANAGEMENT
Previous soil assessment data indicates that hazardous waste does not exist at the subject site.
As such, soil cuttings from the soil and temporary well borings will be spread at the site, unless
PID readings indicate that soils are contaminated. Purge water and decontamination materials
will be containerized into 55-gallon drums for off -site disposal, pending receipt of laboratory
analytical results.
REPORTING
Following completion of assessment field activities and receipt of laboratory analytical data,
Mid -Atlantic will prepare a Limited Site Assessment Report to document field activities and
provide analysis of the data collected. Each concentration detected in the soil samples collected
will be compared to the appropriate NC Preliminary Soil Remediation Goals (PSRGs, February
2018). Each concentration detected in groundwater sampled will be compared to the
appropriate North Carolina Groundwater Quality Standards (NCGQS) and the Division of Waste
Management (DWM) Residential and Non -Residential Vapor Intrusion Screening Levels
(February 2018). At a minimum, the report will include:
• Reporting/summary of site work conducted for all sections outlined above;
• Summary of findings and possible recommendations;
• All applicable tables and figures including tabulated analytical data per media sampled and
compared to the screening levels mentioned above and figures depicting actual sample
locations;
Mid Atlantic
Engineering & Environmental Solutions
Phase 11 Work Plan February 18, 2019
Cary Overture Page 5
Cary and Morrisville, North Carolina
• Mid -Atlantic's PE/PG License Number; and
• The Professional Engineer's or Licensed Geologist's individual PE/LG seal and signature.
CLOSING
We appreciate the opportunity to submit this Work Plan. Should you have any questions please
do not hesitate to reach me at 919-250-9918.
Sincerely,
MID-ATLAN,l
41q,ASSQCIATES, INC.
DAniel H. lie en, Z?,9 _11K
Principal
Attach
Darin M. McClure, PE
Principal Engineer
Atlantic
Engineering & Environmental Solutions
TABLES
Mid Atlantic
Engineering & Environmental Solutions
TABLE 1
Limited Site Assessment Soil Sampling Plan
Overture Cary
Cary and Morrisvile, North Carolina
Boring
Soil
Boring
Default Sample
Description
Sample
VOCs
SVOCs
Metals
Name
Depth*
Depth"
Name
SB-1
SB-1
5 feet
1.5-2.5 feet
G
G
G
Stained Area
SB-2
SB-2
5 feet
1.5-2.5 feet
G
G
G
SB-3
SB-3
5 feet
1.5-2.5 feet
G
G
G
Tele-
communications
SB-4
SB-4
5 feet
1.5-2.5 feet
G
G
G
Tower
SB-5
SB-5
5 feet
1.5-2.5 feet
G
G
G
Debris Piles
SB-6
SB-6
5 feet
1.5-2.5 feet
G
G
G
Background
BG-1
BG-1
5 feet
1.5-2.5 feet
--
G
Duplicate
Sam le**
1, G
Totals
6
7
6
7
VOCs: Volatile Organic Compounds by EPA Method 8260
SVOCs: Semi -Volatile Organic Compounds by EPA Method 8270
Metals: Eight RCRA metals
G: Grab Samples
C: Composite Sample
*Depth Below Land Surface
**Duplicates to be collected at sample intervals that appear contaminated, if identifiable in the field.
Notes: 1. Default sample depth used if field evidence does not suggest an alternative sample depth.
2. For borings with composite sample, select VOC sample interval with highest TVA reading
TABLE 2
Limited Site Assessment Groundwater Sampling Plan
Overture Cary
Cary and Morrisville North Carolina
Temporary
Groundwater
Temporary
Screen
Groundwater
Description
Monitoring
Monitoring
Interval*,'
Sample Name
VOCs
SVOCs
Metals
Well Name
Well Depth*
Stained Area
TMW-1
30 feet
20 to 30
TMW-1
X
X
X
feet
Telecommunication Tower
TMW-2
30 feet
20 to 30
TMW-2
X
X
X
feet
Duplicate Sample
X
Totals
2
2
3
2
2
VOCs: Volatile Organic Compounds by EPA 8260
SVOCs: Semi -Volatile Organic Compounds by EPA Method 8270
Metals: Eight RCRA metals
*Feet below land surface
Note 1: Set well screen to intercept water table
FIGURES
Mid Atlantic
Engineering & Environmental Solutions
a
REFERENCES:
1. CARY, NC DIGITAL RASTER GRAPHICS,
USGS. SCANNED FROM1:24,000-SCALE CARY, NC
TOPOGRAPHIC MAPS, PUBLISHED 2013, USGS.
2. INSET MAP DIGITAL DATA FROM 2002 NATIONAL TRANSPORTATION ATLAS,
BUREAU OF TRANSPORTATION STATISTICS, WASHINGTON, D.C.
3. PROPERTY BOUNDARY DATA FROM WAKE COUNTY GIS.
Mid Atlantic
Engineering & Environmental Solutions
TOPOGRAPHIC SITE MAP
CARY OVERTURE
3624 & 3612 DAVIS DRIVE
CARY & MORRISVILLE,
NORTH CAROLINA
SCALE: 1:12,000
Feet
0 1,000 2,000
DRAWN DATE:
BY: EBA FEBRUARY 2019
DRAFT JOB NO:
CHECK: OOOR3021.01
ENG. GIS NO:
CHECK: 1 G-R3021.01-1
APPROVAL: DWG NO: 1
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PROPOSED SAMPLE LOCATIONS
21
STAIN
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GENERATOR WITH 200-GALLON AST
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PAD MOUNTED TRANSFORMER
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SUBJECT SITE
'
0
50 100 200
PARCEL BOUNDARY r
,
Feet
DRAWN BY: EBA
DATE: FEBRUARY 2019
Mid Atlantic
SAMPLE LOCATION MAP
CARY OVERTURE
DRAFT CHECK
BY.
JOB NO.: 00OR3021.01
3624 & 3612 DAVIS DRIVE
ENGINEER CHECK
GIS NO.: 1G-000R3021.01-2
Engineering & Environmental Solutions
CARY & MORRISVILLE, NORTH CAROLINA
APPROVED
BY:
DRAWING NO.: 2
REFERENCE: DATA FROM WAKE COUNTY COUNTY GIS. MID -ATLANTIC FIELD NOTES.