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nECIVE® <br /> r <br /> NOV 2 7 2013 <br /> PANGEA <br /> ENVIRONMENTAL HEALTH <br /> PERMIT/SERVICES <br /> November 22,2013 <br /> Ms. Vicki McCartney j <br /> San Joaquin County �� ✓� Lo�,Y <br /> Environmental Health Department ` e,,,C,✓ <br /> 1868 East Hazelton Avenue t� i ft <br /> Stockton,California 95205-6232 <br /> Re: Workplan for Additional Assessment and Subslab Gas Sampling <br /> Tracy Office Plaza <br /> 324 E. 1 I th Street <br /> Tracy,California 95376 <br /> SCEHD Site No. 12083 <br /> Dear Ms. McCartney: <br /> On behalf of Tracy Office Plaza LLC, Pangea Environmental Services, Inc. (Pangea) has prepared this <br /> Workplan for Additional Assessment and Subslab Gas Sampling(Workplan).This Workplan was requested by <br /> a San Joaquin County Environmental Health Department (SCEHD) letter dated August 21, 2013. The <br /> Workplan was requested to define the lateral and vertical extent of contamination identified in Pangea's Phase <br /> 11 Environmental Assessment Report dated July 23,2013. Pangea proposes soil borings to assess the veritcal <br /> and lateral extent of contamination and subslab gas sampling to evaluate potential vapor intrusion into indoor <br /> air for the onsite building. <br /> If you have any questions or comments, please call me at(510)435-8664. <br /> Sincerely, <br /> Pangea Environmental Services, Inc. <br /> Bob Clark-Riddell, P.E. <br /> Principal Engineer <br /> Attachment: Workplan for Additional Assessment and Subslab Gas Sampling <br /> cc: Mr.Michael Black,Tracy Office Plaza LLC.2423 W. March lane.Suite 202,Stockton,CA 95207 <br /> SWRCB Geotracker Database(electronic copy) <br /> PANGEA Environmental Services, Inc. <br /> 1710 Franklin Street,Suite 200,Oakland.CA 94612 Telephone 510.836.3700 Facsimile 510.836.3709%%u%%.Vanxcaem.com <br />