19041_Davidson Depot St_BF LSI_Rev03

Terracon Consultants, Inc.2020-E Starita Road Charlotte, North Carolina 28206
P [704] 509 1777 F [704] 509 1888 terracon.com
April 27, 2016
Revision 3, July 19, 2016
Miller-Valentine Residential Development LLC and
Davidson Depot LLC
9349 Waterstone Boulevard
Cincinnati, Ohio 45249
Attn: Mr. Charles Rulick, MRED, LEED AP
Vice President
P: [980] 613-8109
[e-mail]
Re:Proposal for Environmental Consulting Services
Davidson Depot (Metrolina Warehouse Brownfields Site)
301 Depot Street
Davidson, North Carolina
Terracon Proposal No. P71167233A
Dear Mr. Rulick:
Terracon Consultants, Inc. (Terracon) is pleased to submit this proposal to perform
environmental consulting services at the above-referenced Davidson Depot property (also
known as Metrolina Warehouse Brownfields Site) in Davidson, North Carolina. It is our
understanding that Miller-Valentine Residential Development LLC and Davidson Depot LLC
are requesting a proposal to conduct certain initial requirements for the North Carolina
Brownfields Program (NCBP) that are necessary to proceed with the development of the site
and continue the Brownfields process.
A.PROJECT INFORMATION
The project site is located west of Main Street in Davidson, North Carolina, bound by Depot
Street, Sloan Street, and Eden Street. The site, which is occupied by two buildings, was
formerly used as an asbestos warehousing and sales facility that is currently used as a
furniture warehouse and cross-fit exercise facility.
Based on information provided in a Phase I Environmental Site Assessment (ESA)
completed by LawGibb Group [LAW] (Project No. 6228-07-4436, report dated December 20,
2007), a Report of Environmental Services completed by Law (Project No. 30100-1-1046,
report dated February 14, 2002) and site observations by Terracon, a 12,000-gallon
underground fuel oil storage tank (UST) is located near the southeastern corner of the
warehouse building and the property boundary (LAW identified the tank location during a
magnetometer survey). Although LAW considered the tank as an off-site concern, the tank
reportedly may have supplied fuel to an on-site boiler system prior to 1949. According to the
ESA, Haz-Mat removed approximately 12,700 gallons of product and water from the tank in
Proposal for Environmental Consulting Services
Davidson Depot ■ Davidson, NC
April 27, 2016 (Rev. 3 – July 19, 2016)■ Terracon Proposal No. P71167233A
Responsive ■Resourceful ■Reliable 2
April 2002 leaving about three inches of residual fluids and sludge in the tank after the
removal activities. Analytical results of soil samples collected by LAW near the tank did not
indicate a release from the tank. The approximate location of the UST is shown on Figure 1.
B.ASSESSMENT ACTIVITIES
Terracon has been requested by Miller-Valentine Residential Development LLC and Davidson
Depot LLC to provide a scope of services for assessing the on-site tank for potential impacts
to the surrounding soils. Additionally, the North Carolina Brownfields Program requested the
collection of soil samples near the loading dock area in the northeastern portion of the site,
groundwater samples to establish depth to groundwater and flow direction, and collection of
soil vapor samples.
Terracon project personnel will provide the client with routine project updates and will direct
field activities regarding site activities after obtaining proper authorization to proceed. Based
on our understanding of this project, Terracon proposes to perform the following scope of
services.
Task 1: Pre-Task Planning and Utility Locating
Terracon has a 100% commitment to the safety of all its employees. As such, and in
accordance with our Incident and Injury Free® safety culture, Terracon will develop a safety
plan to be used by our personnel during field services. Prior to commencement of on-site
activities, Terracon will hold a meeting to review health and safety needs for this specific
project. At this time, we anticipate performing fieldwork in a USEPA Level D work uniform
consisting of hard hats, safety glasses, protective gloves, and steel-toed boots. It may
become necessary to upgrade this level of protection, at additional cost, while sampling
activities are being conducted in the event that petroleum constituents are encountered in
soils or groundwater that present an increased risk for personal exposure.
Prior to drilling activities, Terracon will contact NC-One Call, a public utility locating
company, to locate on-site underground utilities. In addition, Terracon will engage a private
utility locator to identify underground utilities that could be present at the proposed boring
locations. The private utility locator will also identify underground utilities at the locations of
the five soil vapor borings (discussed below) and use ground penetrating radar (GPR) to
locate the underground storage tank.
Task 2: Soil Assessment Activities
Terracon will advance one soil boring at each end of the UST (SB-04 and SB-06), one
boring near the center of the tank (SB-05) and one boring along the supply line (SB-03)
based on the reported distance of the tank to the building (estimated 10 feet) for a total of
four (4) soil borings. The soil borings adjacent to the tank will be extended to a depth of up
Proposal for Environmental Consulting Services
Davidson Depot ■ Davidson, NC
April 27, 2016 (Rev. 3 – July 19, 2016)■ Terracon Proposal No. P71167233A
Responsive ■Resourceful ■Reliable 3
to ±15 feet below ground surface (bgs) while the boring near the supply line will be
advanced to a depth of about 5 feet bgs,
Soil samples will be obtained from the borings utilizing Geoprobe® or a similar direct-push
drilling technology and Macro-Core® samplers. Soil type, relative moisture content, and
other lithologic characteristics will be documented on field boring logs. Soil samples will be
placed into dedicated, re-sealable plastic bags and screened for organic vapors using a
photo-ionization detector (PID). The PID results and our observations will be used to select
sample intervals from the borings for laboratory analysis. If the PID readings do not indicate
a release, the samples will be obtained from the bottom depth of the borings.
Two additional soil borings (SB-01 and SB-02) will be advanced to 15 feet bgs in the paved
area between the loading dock (located offsite) and the on-site building. One soil sample
will be collected from each of the two borings if PID readings exceed 5 ppm. If PID readings
are below 5 ppm, a soil sample will not be collected from these two borings.
During assessment and drilling activities, an asbestos competent person will be on the site
to monitor the presence of asbestos-containing materials (ACM) in the soils. At a minimum,
employees and subcontractors performing soil sampling activities will have asbestos
awareness training sufficient for Class IV Asbestos Work Activities under the OSHA
Construction Standard, 29 CFR 1926.1101.
The soil samples obtained near the UST and potentially near the loading dock will be placed in
laboratory-prepared glass containers, labeled with pertinent sample information and stored in
an ice-packed cooler pending submittal to a North Carolina certified laboratory for analysis of
volatile organic compounds (VOCs) by EPA Method 8260, semi-volatile organic compounds
(SVOCs) by EPA Method 8270 and the eight RCRA metals by EPA Method 6010 in
accordance with requirements by the North Carolina Brownfields Program. Terracon
anticipates up to six samples will be collected at the site. Chain of custody documentation will
accompany the samples to the laboratory.
Task 3: UST and Loading Dock Assessment Report
Upon completion of UST and loading dock assessment activities and receipt of the
laboratory analytical results, a report will be prepared that will include the following items:
· Documentation of field activities;
· Site plan showing pertinent site features;
· Soil boring logs;
· Analytical laboratory results;
· Data evaluation and presentation of findings including comparison of soil data to
applicable regulatory standards; and,
· Recommendations concerning further action, if necessary
Proposal for Environmental Consulting Services
Davidson Depot ■ Davidson, NC
April 27, 2016 (Rev. 3 – July 19, 2016)■ Terracon Proposal No. P71167233A
Responsive ■Resourceful ■Reliable 4
The report will be completed in a format suitable for submittal to the North Carolina
Brownfields Program. Work associated with this scope of services will be performed under
the direction of a Licensed Geologist registered in the State of North Carolina.
Task 4: Groundwater Sample Collection
Three soil borings will be advanced to the water table (GW-01 through GW-03) using a
direct push technology (DPT) drilling rig. Prior to advancing each boring, the drill tooling will
be cleaned to prevent cross-contamination of samples. Proposed boring locations are
shown on Figure 1. Collection of grab groundwater samples will be attempted at the
locations of borings GW-01, GW-02 and GW-03. The sample/screen interval will be selected
based on observations of recovered soil but generally, groundwater samples will be
collected at the water table. The samples will be collected through 1-inch diameter PVC well
screen and riser that will be removed upon sample collection. If depth to groundwater
permits, a peristaltic pump will be used for sample collection. Installation of temporary
monitoring wells is not foreseen unless the formation does not produce sufficient water for
sample collection within a reasonable amount of time. A survey transit will be utilized to
obtain relative top of casing elevations at each groundwater sample location as required for
the calculation of the groundwater flow direction and gradient.
The samples will be submitted for laboratory analysis of volatile organic compounds (VOCs)
by EPA Method 8260 and semi-volatile organic compounds (SVOCs) by EPA Method 8270,
and RCRA metals. Groundwater samples will be collected and placed in laboratory provided
containers, labeled, and placed on ice in a cooler which will be secured with a custody seal.
The samples and completed chain-of-custody forms will be transported to Pace Analytical in
Huntersville, NC, a North Carolina certified analytical laboratory, on a standard analytical
schedule. Duplicate samples, field/equipment blank or other QA/QC samples are not
included as part of this investigation.
The results of the groundwater sampling activities at the site will be included in the soil
assessment report for the UST and the loading dock.
Based on follow-up discussions with the current property owner, no water supply wells are
located on the property.
Task 5: Soil Vapor Investigation
RATIONALE AND OBJECTIVE
The soil vapor (SV) investigation is designed to evaluate potential vapor intrusion concerns
and potential subsurface impacts from historical on-site or off-site conditions. As required by
the NC Brownfields Program, this investigation will assess the potential for vapor intrusion
impacts to the future development of the site. Specifically, the proposed investigation is
focused on the area near the former asbestos manufacturing building and locations of future
Proposal for Environmental Consulting Services
Davidson Depot ■ Davidson, NC
April 27, 2016 (Rev. 3 – July 19, 2016)■ Terracon Proposal No. P71167233A
Responsive ■Resourceful ■Reliable 5
building foundations (Figure 1). Five shallow SV samples are proposed at the site mostly
within the proposed building footprint.
INSTALLATION AND SAMPLING METHODOLOGY
Technical approaches and methods outlined in this soil vapor investigation proposal are in
general accordance with the Interstate Technical and Regulatory Council’s Vapor Intrusion:
A Practical Guideline (2007) and Vapor Intrusion Pathway: Investigative Approaches for
Typical Scenarios (2007), as well as the North Carolina Division of Waste Management
(DWM)Vapor Intrusion Guidance (2014).
Terracon will advance the soil borings utilizing a Geoprobe® or a similar direct-push drilling
technology at the five proposed SV sample locations (Figure 1). Borings for the SV points
will be advanced to depths of about 15 feet bgs or refusal whichever is shallower. No SV
points will be installed shallower than 5 feet bgs to avoid drawing ambient air into the SV
screen (short-circuiting). Groundwater is not anticipated to be present in the five borings.
During soil vapor investigation drilling activities, an asbestos competent person will be on
the site to monitor the presence of asbestos containing-materials (ACM) in the soils. At a
minimum, employees and subcontractors performing soil sampling activities will have
asbestos awareness training sufficient for Class IV Asbestos Work Activities under the
OSHA Construction Standard, 29 CFR 1926.1101.
Unsaturated zone soils will be screened utilizing a photo-ionization detector (PID). A soil
sample will only be collected from each boring that exhibits PID readings greater than 10
parts per million (ppm) or if staining or odors are apparent. The samples will be submitted
for laboratory analysis of volatile organic compounds (VOCs) by EPA Method 8260. Soil
samples, if collected, will be placed in laboratory provided containers, labeled, and placed
on ice in a cooler which will be secured with a custody seal. The samples and completed
chain-of-custody forms will be transported to a North Carolina certified analytical laboratory
on a standard analytical schedule.
A new, 6 inch long stainless steel wire mesh soil gas screen attached to Teflon tubing will be
inserted into the boring and the annular space between the implant and the boring will be
backfilled with well filter pack sand to 0.5 feet above the top of the screen. Hydrated
bentonite grout will be used to fill the remainder of the borehole to ground surface.
In order to test the integrity of the vapor sampling point seal, both a shut-in test and a helium
tracer test will be conducted at each sample point. In addition to the tracer test performed in
the field, one sample will be analyzed for helium by the analytical laboratory. One duplicate
soil gas sample will be collected to assess laboratory method precision. The interior volume
of each sample point will be purged to ensure the conditions inside the sample point reflect
soil vapor conditions. After purging, each soil vapor sample will be collected in a laboratory
Proposal for Environmental Consulting Services
Davidson Depot ■ Davidson, NC
April 27, 2016 (Rev. 3 – July 19, 2016)■ Terracon Proposal No. P71167233A
Responsive ■Resourceful ■Reliable 6
supplied, pre-cleaned Summa canister with a flow controller set for 5 minutes. The vacuum
pressure of the sample canister will be monitored and recorded at regular intervals
throughout the sampling period.
An outdoor air sample (OA-01) will also be collected concurrently with the soil vapor
samples to assess the presence of VOCs in ambient air. The outdoor air sample will be
collected upwind of the soil gas sample points and the sample intake will be located
approximately 5 feet above ground surface. The ambient air sample will also be collected in
a laboratory supplied Summa canister through a section of tubing attached to a flow
controller set for 4-6 hours.
Following completion of the field activities, the Summa canisters (7 canisters/samples),
along with chain-of-custody documentation, will be shipped to Eurofins AirToxics, Inc. in
Folsom, California for laboratory analysis of volatile organic compounds (VOCs) by EPA
Method TO-15, TO-15 Low Level, and ASTM-1946 (helium). The complete analyte list will
be reported for each respective analytical method.
Task 6: Preparation of the Soil Vapor Investigation Report
Upon completion of soil vapor investigation activities and receipt of the analytical results, a
written report will be prepared that will include the following items:
· Documentation of field activities;
· Site plan showing pertinent site features;
· Sampling point construction diagrams/locations;
· Analytical laboratory results;
· Data evaluation and presentation of findings; and,
· Recommendations concerning further action, if necessary.
Task 7: Brownfields Receptor Survey
Per a request by Ms. Carolyn Minnich of the NC Brownfields Program, the existing receptor
survey for the site is outdated and needs to be updated. Terracon will update the receptor
survey by performing a walking tour and windshield survey of the site areas and reviewing
necessary information to complete the receptor survey.
Task 8: Environmental Management Plan (EMP)
Terracon will prepare an Environmental Management Plan (EMP) for the Davidson Depot
site in accordance with North Carolina Brownfields Program (NCBP) requirements. The
purpose of the EMP is to safely manage impacted soils (including asbestos impacted soils)
and groundwater (if necessary) during site redevelopment. The EMP will describe the type
and locations of contaminants of concern (COCs), environmental risks at the site, and will
provide instructions for handling contaminated materials that could be encountered during
Proposal for Environmental Consulting Services
Davidson Depot ■ Davidson, NC
April 27, 2016 (Rev. 3 – July 19, 2016)■ Terracon Proposal No. P71167233A
Responsive ■Resourceful ■Reliable 7
redevelopment activities. A draft version of the EMP will be submitted to the NCBP for
approval.
Schedule
Terracon is prepared to commence work on this project following receipt of written
notification to proceed. It is anticipated that on-site field activities will be completed within
two to three business days; however, our schedule will be dependent on site conditions, and
the field activities of our subcontractor.
Terracon’s services will be performed in a manner consistent with generally accepted
practices of the professional undertaken in similar studies in the same geographic area
during the same time period. Terracon makes no warranties, expressed or implied,
regarding its services, findings, conclusions or recommendations. Please note that
Terracon does not warrant the work of laboratories, regulatory agencies or other third
parties supplying information used in the preparation of the report. These assessment
services will be performed in accordance with the scope of work agreed by you, our client,
as set forth in this proposal and are not intended to be in strict conformance with the
previously discussed guidance documents.
Findings, conclusions and recommendations resulting from these services will be based
upon information derived from on-site activities and other services performed in accordance
with this scope of work. Such information is subject to change over time. Certain indicators
of the presence of hazardous substances, petroleum products, or other constituents may
have been latent, inaccessible, unobservable, undetectable or not present during the
performance of these services; thus, we cannot represent that the site is free of hazardous
or toxic substances, petroleum products, or other latent conditions beyond those identified
during this assessment. Subsurface conditions may vary from those encountered at specific
borings or wells or during other surveys, tests, assessments, investigations or exploratory
services; the data, interpretations, findings and our recommendations are based solely upon
data obtained at the time and within the scope of these services.
C.COMPENSATION
Terracon’s fees are included in a separate document.
Proposal for Environmental Consulting Services
Davidson Depot ■ Davidson, NC
April 27, 2016 (Rev. 3 – July 19, 2016)■ Terracon Proposal No. P71167233A
Responsive ■Resourceful ■Reliable 8
Reliance
The assessment reports will be prepared for the exclusive use and reliance of Miller-
Valentine Residential Development LLC and Davidson Depot LLC and the North Carolina
Brownfields Program. Reliance by any other party is prohibited without the written
authorization of Miller-Valentine Residential Development LLC and Davidson Depot LLC
and Terracon.
If the client is aware of additional parties that will require reliance on the report or
specifications, the names, addresses and relationship of these parties should be provided
for Terracon approval prior to the time of authorization to proceed. Terracon will grant
reliance on the report and specifications to those approved parties upon receipt of a fully
executed Reliance Agreement (available upon request). If, in the future, the client and
Terracon consent to reliance on the report and specifications by a third party, Terracon will
grant reliance upon receipt of a fully executed Reliance Agreement and receipt of an
additional fee of $250.00 per relying party.
Reliance on the reports by the client and all authorized parties will be subject to the terms,
conditions and limitations stated in the Agreement for Services authorized in our Proposal
No. P71150239, dated June 17, 2015 (and sections of this proposal incorporated herein),
the Reliance Agreement and the report.
Closing
If conditions are encountered at the site, which require significant changes in the scope of
services or a significant increase in the anticipated number of hours or samples which will
increase the cost of the services, you will be contacted for discussion and approval of such
changes before we proceed.
If this scope of services meets with your approval, work may be initiated by signing below
and returning an original copy of Proposal P71167233A to our Charlotte, North Carolina
office. Project initiation may be expedited by faxing a copy of this signed proposal to
Terracon at [phone].
The terms, conditions and limitations stated in the previously authorized Agreement for
Services attached to Proposal No. P71150239, dated June 17, 2015 (and sections of this
proposal incorporated herein), shall constitute the exclusive terms and conditions and
services to be performed for this project. This proposal is valid only if authorized within sixty
(60) days from the proposal date.
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Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AEX, Getmapping, Aerogrid, IGN, IGP, swisstopo, and the GIS UserCommunity
PH. [phone] terracon.com
2020 STARITA RD, SUITE E CHARLOTTE, NC
FIGURE
1
SITE LAYOUT AND PROPOSEDSAMPLE LOCATION MAP
DAVIDSON DEPOTMETROLINA WAREHOUSE BROWNFIELDS301 DEPOT STREETDAVIDSON, NC
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07/18/2016
Project No.:
Drawn By:
Checked By:
Date:
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Legend
Site Parcel
Parcel Boundaries
Approximate Proposed Building Footprint
Approximate Location of Underground Storage Tank
&,Proposed Groundwater Sample Location
!(Proposed Soil Boring Location
")Proposed Soil Vapor Sample Location
Notes:- Sample locations are approximate and will be adjusted based on field conditions.- Locations of the proposed building footprint and site features are approximate.- Parcel data obtained from Mecklenburg County GIS website.
Approximate Location of Underground Storage Tank
DEPOT STREET
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J A C K S O N S T R E E T
Loading Dock (Offsite)