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Wright <br /> I <br /> Environmental <br /> Services, Inc. <br /> October16, 2000 <br /> Construction ♦ Engineering Remediation V OCT3 <br /> 0 pH , <br /> 3' 02 <br /> I <br /> M&M Builders Supply i <br /> P. O. Box 1107 <br /> Tracy, CA 95378-1107 <br /> Attn.: Mr. Shawn Kelly <br /> Re: Proposal for Additional Site Groundwater Investigation, <br /> and Groundwater Monitoring Well Installation <br /> M&M Builders, 8111 West 11th Street, Tracy, CA <br /> PHS-EHD Site Code 1530 <br /> f Wright Project No. 4669 <br /> Dear Mr. Kelly, <br /> Wright Environmental Services, Inc. (Wright) has prepared this work plan for the <br /> Additional Site Assessment Investigation at the above `referenced site located at 8111 <br /> West Eleventh Street, Tracy, CA (see Figure 1). The purpose of this work plan is to <br /> perform additional assessment of petroleum contaminants in soil and groundwater near <br /> and around the former tank pit areas as required by the San Joaquin County Public Health . <br /> 4 Services Environmental Health Division (PHS-EHD) in" their letters dated August 16, <br /> 1999, December 29, 1999 and June000. This work plan modifies and supercedes <br /> Wright's work plan dat September 6, 200 <br /> Background I <br /> i <br /> Two underground storage tanks have been removed fromthe site; one 1,000-gallon diesel <br /> tank on August 8, 1988 and one 1,000-gallon gasoline tank on June 23),-1994. Soil <br /> samples and groundwater samples showed presence of.jotal Petroleum Hydrocarbons <br /> (TPH) as Gasoline (TPHG), and Benzene, Toluene, Ethyl benzene and Xylenes (BTEX). <br /> A water sample from the former gasoline tank location appeared anomalous and a re-test <br /> or explanation of sampling protocol for that sample (sampled on July 28, 1994) was <br /> requested by PHS-EHD. Apparently this sampling/protocol issue was never resolved to <br /> satisfaction and the PHS-EHD, who then requested !'a vertical and horizontal site <br /> assessment investigation to be performed on the site. !A 2000-foot radius water well <br /> survey was performed prior to the site investigation to locate wells registered with the <br /> State and City of Tracy. This information was sent to PHS-EHD in Wright's letter dated <br /> February 24, 2000. <br /> 67 E. 10th Street . Tracy, CA 9576 <br /> M&M Builders Supply 209.833.0758 • Fax 209.832.5152 <br /> 2000 <br /> Wright Project No. 4669 wright@inreach.com Lic. #651501 A-B HazMat tl�, <br /> websit hnp.,//home.inreach.com/wright <br /> E <br />