13005_Tyner St_Additional assessment 2010.06.21

1646 Mail Service Center, Raleigh, North Carolina 27699-1646
Phone: [phone] \ FAX: [phone] \ Internet: www.wastenotnc.org
An Equal Opportunity \ Affirmative Action Employer

June 21, 2010

Sent Via E-mail and USPS

Mr. Frank Bishop
Frank Bishop, Inc.
2130 Lawton Bluff Road
Charlotte, NC 28266
[e-mail]

Subject: Request for Additional Assessment
Tyner Street Redevelopment
7810- 7820 and 7842 Tyner Street
Charlotte, Mecklenburg County
Brownfields Project Number 13005-09-60

Dear Mr. Bishop:

The North Carolina Department of Environmental and Natural Resources (DENR) has reviewed
the currently available information for the above referenced site and determined that data gaps have been
identified. Additional assessment activities, as outlined below, are required to assist in making risk
management decisions for inclusion in the brownfields agreement (BFA).

• General: The most recent Inactive Hazardous Sites Program Guidelines for Assessment and
Cleanup should be followed (http://portal.ncdenr.org/web/wm/sf/ihs/ihsguide), which in turn relies upon
EPA's Environmental Investigations Standard Operating Procedures and Quality Assurance Manual.
Request Level 2 QA/QC data packages from a N.C. certified environmental laboratory. Submit a work
plan for review prior to conducting field work for approval by DENR to ensure all aspects of the
requirements are covered.

• Sampling Activities:

• Soil: Collect shallow soil samples, see attached figure for locations.

• Groundwater: Collect groundwater samples from existing monitoring wells. Record depth
of static groundwater in each well prior to purging activities, and field parameters (e.g., temperature,
dissolved oxygen, pH, turbidity, and conductivity) prior to sampling activities for summary report.
Contain purge water for analysis prior to disposal following approval by DENR. In lieu of sampling the
North Carolina Department of Environment and Natural Resources
Dexter Matthews, Director Division of Waste Management Beverly Eaves Perdue, Governor
Dee Freeman, Secretary

Mr. Bishop
June 2010
Page 2 of 2

containers, the consultant may rely on sample analysis for disposal options. The ultimate disposal
information must be included in the report.

• Soil-Gas: Collect soil-gas samples and/or sub-slab soil-gas samples. Submit a work plan to
brownfields program for review and approval prior to schedule the field work. For sub-slab and near slab
soil vapor sampling, methods should be used that are consistent with the following guidelines and
information:

9 EPA Compendium Method TO-15 (EPA/625/R-96-010b). (8- 24 hour sample duration).
9 Section 3.0 of the “Assessment of Vapor Intrusion in Homes near the Raymark Superfund Site
Using Basement and Sub-Slab Air Samples”.
9 Vapor Intrusion Sampling Draft Guidance, NCDENR Brownfields Program (attached)
9 Inactive Hazardous Site Branch Vapor Intrusion Guidance

• Laboratory Analyses: Submit samples to a NC-certified laboratory. Analyze all groundwater
volatile organic compounds (VOCs) by EPA Methods 8260, semi-volatile organic compounds (SVOCs)
by EPA Method 8270, and 13 hazardous substance list metals (see section A.7.1.2 of the Inactive
Hazardous Sites Guidance referenced above) in addition include total chromium and hexavalent
chromium. Analyze soil samples for total chromium and hexavalent chromium. Analyze all soil-gas
samples by TO-15 Method. Ensure laboratory method detection limits are below applicable standards.
Provide complete original laboratory reports and associated laboratory QA/QC documentation in the final
report to DENR.

• Report and Figures: Submit an assessment report with a description of field activities, tabulated
data (including historical data), the laboratory data packet, and information requested in above bullets.
Provide a site plan with temporary well locations, estimated locations of previous soil boring, and current
site structures. Provide concentration map(s) for contaminants detected above applicable standards.
Provide summary analytical table for contaminate detected by the laboratory versus the state standard and
include historical data, if available.

Please have your environmental consultant contact me to discuss this work plan. Once these
activities are complete, we will determine if any additional information is needed to complete our
evaluation of site risks and preparation of the draft Brownfields Agreement.

Sincerely,
Carolyn Minnich
Carolyn F. Minnich
Brownfields Project Manager
Division of Waste Management

cc: Project File

ec: Bruce Nicholson, DENR
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SITE ID# NCD 059145615 GROUNDWATER ELEVATION MAP
PROJECT NO. t 1 \ 90 NOVEMBER 14, 2005
DRAWN BY: AWB FORMER AMPLA TE. INC.
CHECKED BY: RT 7820 TYNER ST.
CHARLOTTE. NC
DWG DATE: t /16/06