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AEGIS ENVI R O N M E N TA L , INC . <br /> 1050 Melody Lane, Suite 160, Roseville, CA 95678 ♦ 916.782-2110 1 916-969-2110/FAX 916.786-7830 <br /> February 8, 1993 ' <br /> IJt.,1 <br /> E[,Ji 1Pf);*%%q N-f A I <br /> Ms. Antonia Vorster, Senior Engineer Itgr� <br /> Ms. Cori Condon, Associate Engineering Geologist <br /> Central Valley Regional Water Quality Control Board <br /> 3443 Routier Road, Suite A <br /> Sacramento, California 95827-3098 <br /> Subject: Results of Additional Limited Site Investigation and <br /> Request For Site Closure <br /> Former California Fuels Site <br /> 838 Mokelumne Street, Woodbridge, California <br /> Dear Ms. Vorster and Condon: <br /> Aegis Environmental, Inc. (Aegis), on behalf of California Fuels, is pleased to provide the <br /> Central Valley Regional Water Quality Control Board (CVRWQCB)the enclosed"Additional <br /> Site Investigation Results Report," dated February 1, 1993. The report documents the <br /> additional limited investigation conducted at the subject by Aegis on November 24, 1992. <br /> In addition, Aegis hereby requests closure of the site for the reasons discussed below. <br /> PRESENT INVESTIGATION <br /> The scope of the investigation was agreed to, in principal, between Mr. David Atwater, of <br /> California Fuels, Aegis, and the CVRWQCB during a meeting held at the CVRWQCB <br /> offices on October 7, 1992, at the request of California Fuels and Aegis. In addition, <br /> certain understandings governing the plan of the investigation were memorialized in a <br /> letter to the CVRWQCB from Aegis, dated October 27, 1992. The understandings <br /> included the number and location of the soil borings, the depth(s) of investigation, and <br /> the laboratory analytical methods required by the CVRWQCB to be used for testing the <br /> collected soil samples for concentrations of total petroleum hydrocarbons (TPH), as <br /> diesel. Namely, modified Soluble Threshold Limit Concentration/Waste Extraction Test <br /> (STLC/WET) methods combined with GC-FID/EPA Methods 3510/8015. <br /> 89-031 BB.LTR <br /> GEOLOGISTS • ENGINEERS • GROUNDWATER SCIENTISTS <br />