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1 <br /> SECOR <br /> International Incorporated <br /> December 20, 2001 <br /> Mr Marty Hartzell <br /> California RWQCB Central Valley Region <br /> 3443 Routier Road, Suite A <br /> Sacramento, CA 95827-3098 <br /> Subject: Cone Penetrometer Testing Assessment Report <br /> Ranch Market <br /> 23569 South Santa Fe Road <br /> Riverbank, California <br /> SECOR Project No.077.42083.008 <br /> Dear Mr Hartzell <br /> SECOR International Incorporated (SECOR), working on behalf of Mr Durhim Ali Juban, <br /> submits this letter as a report summarizing Cone Penetrometer Testing boring installation for <br /> additional groundwater assessment at the Ranch Market Site located at 23569 South Santa Fe <br /> Road in Riverbank, California (Figures 1 and 2, Attachment 1) The work was conducted as <br /> proposed in SECOR's Work Plan for Additional Groundwater Assessment, dated May 10, <br /> 2001 <br /> REGULATORY REVIEW & DIRECTION <br /> This work was conducted in response to a May 3, 2001, meeting with Regional Water Quality <br /> Control Board, Central Valley Region (RWQCB) The RWQCB requested the assessment <br /> include the following <br /> • Further definition of the lithology between the former underground storage tank <br /> (UST) pit and DW-3 and DW-4, and east of the site across South Santa Fe Road <br /> utilizing Cone Penetrometer Testing (CPT), <br /> • Vertical distribution of gasoline range petroleum hydrocarbons dissolved in <br /> groundwater between the former UST pit and DW-3 and DW-4, and east of the <br /> site across South Santa Fe Road (Figure 2), <br /> 30�'� �nch mfoka' , Fu0trtslRb-CPT Install <br /> 1�i gore 1Rtoadd, �b""urte 100, Rancho Cordova, CSI 95670 916 861 0400 916 861 0430 Fax www secor cam <br />