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WESTERN 1386 EAST BF.AMER STREET <br /> WOODLAND CA 95776-66003 <br /> _WL�GE GEO-ENGINEERS (530) 668-530,0, <br /> CALIF.CONTRACTOR#513857 FAX(530)662-0273 <br /> REGISTERED GEOLOGISTS wege@mother.com <br /> Mr. Michael J. Infurna Jr. March 24, 2000 <br /> Senior REHS <br /> Leaking Underground Fuel Storage Tank Program <br /> San Joaquin County Public Health <br /> Environmental Health Division (PHS-EHD) <br /> 304 East Weber Ave., Third Floor <br /> Stockton, CA. 95202 <br /> (209) 468-3454 <br /> RE: Pea Gravel leachability study from samples obtained of excavated pea gravel associated with <br /> gasoline dispensing system removal/ sampling at 6425 Pacific Avenue, Stockton, California 95207. <br /> Dear Mr. Infurna: <br /> INTRODUCTION <br /> On February 23, 2000, W.A. Craig Inc. contracted by Prestige Oil., removed the existing <br /> dispensing system for preparation of upgrade the existing UST dispensing system (product delivery <br /> piping and dispenser areas). In the process of removing the product piping system approximately <br /> 60 cubic yards of pea gravel was exhumed and stockpiled on site. A Western Geo-Engineers <br /> geologist working directly under California Registered Geologist #3037 obtained four discrete <br /> samples of the pea gravel. A sample was obtained from each corner of the pea gravel pile <br /> approximately one foot below the surface. Each sample was collected in a 1-inch by 6-inch clean <br /> stainless steel sleeve. The sample sleeve was then sealed with teflon sheets and plastic end caps to <br /> prevent the loss of VOC's (volatile organic compounds). The steel sleeve was then labeled with <br /> site ID, sample ID, date and time sampled, name of sampler, and laboratory analysis needed. Once <br /> labeled, the sample was put into a ziplock baggy, sealed and placed into an ice chest containing ice <br /> to keep the sample cool until delivery to the analytical laboratory. <br /> A Chain of Custody (CofC) was completed documenting the site ID, sample ID's, date and time <br /> samples were obtained the laboratory analysis needed, and the name of the sampler. The CofC <br /> follows the samples and documents the who and when of possession transfer of the samples, from <br /> collection through final analysis, by California Certified Laboratory, North State Environmental <br /> ELAP Certificate No. 1753, see Appendix A. NSE composted the four samples into one at their <br /> laboratory prior to analysis. <br /> I R-603 piping samples 2-2000 <br />