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RAMAtE <br />ENVIRONMENTAL Sacramento Office <br />14670 Cantova Way, Suite 200 <br />Rancho Murieta, CA 95683 <br />Tel (916) 354-3250 <br />Fax (916) 354-3251 <br />February 23, 1999 <br />Mr. Steve Sasson <br />San Joaquin County PHS/EHD <br />304 East Weber Avenue, Third Floor <br />Post Office Box 388 <br />Stockton, CA 95201-0388 <br />Re: Transmittal — Soil and Soil Stockpile Sample Results <br />RINO Service Station, 1001 E. Yosemite Avenue, Manteca <br />Dear Mr. Sasson: <br />On behalf of Rinehart Oil, Inc., Ramage Environmental is pleased to submit to the San <br />Joaquin County PHS/EHD the enclosed soil and soil stockpile sample results. Attachments <br />include a scaled site plan indicating sample locations, tables summarizing soil and soil <br />stockpile sample results, and the laboratory reports. <br />On January 28, 1999, under your observation, Ramage Environmental collected six soil <br />samples from beneath the former underground storage tanks (UST) and six soil samples from <br />beneath the former dispensers and canopy support structures. Based on the dimensions of the <br />former UST excavation (less the UST volumes) and on measurements of the soil pile <br />generated during the removal of the USTs, Ramage Environmental and PHS/EHD estimated <br />the volume of the soil stockpile from the UST excavation at 500 cubic yards. To characterize <br />the soil stockpile, Ramage Environmental collected 20 soil samples from the stockpile for <br />two -in -one lab composite and analysis. <br />All of the soil samples were collected in brass sample tubes, sealed with Teflon° paper and <br />plastic end caps, labeled, and transported in an iced cooler under chain -of -custody <br />documentation to Kiff Analytical, LLC, a state of California certified hazardous waste testing <br />laboratory (Certification #2236). Kiff analyzed each of the soil samples and soil sample <br />composites for Total Petroleum Hydrocarbons (TPH)-as-Gasoline, benzene, toluene, <br />ethylbenzene, xylenes (BTEX), methyl tertiary butyl ether (MTBE), di -isopropyl ether <br />(RIPE), ethyl tertiary butyl ether (ETBE), tertiary amyl methyl ether (TAME) and tertiary <br />butanol (TBA) by EPA Method 8260B and for total lead by EPA Method 6010. <br />