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ELDER,ENGINEERING INC. <br /> 3750 AUBURN BOULEVARD SUITE A <br /> RE r s" N ' -Nv SACRAMENTO,CALIFORNIA 95821 <br /> Noy z (916)972-8291 <br /> 22 November 1991 <br /> Mr. Ali Othman <br /> San Joaquin Valley Unified Air Pollution Control District <br /> P.O. Box 2009 <br /> Stockton, California 95201 <br /> Subject: Exemption status for 20913 E. Highway 12, Clements, California <br /> Dear Mr. Othman: <br /> In May of 1991 a 630-gallon gasoline tank was removed from the site owned by Teichert <br /> Aggregates at 20913 E. Highway in Clements. Initial sampling indicated that gasoline was <br /> present in the soil beneath the tank. In October approximately 75 to'100 cubic yards of soil <br /> was removed from the excavation, covered with plastic sheeting and stockpiled onsite. On <br /> 4 November 1991 the stockpiled soil was sampled for laboratory analysis by collecting 12 <br /> individual samples (four from each of the east, west, and center portions of the pile), which <br /> were then composited into 3 composite samples (Sample #11 east, #12 center, and #13 <br /> west) for analysis. The three samples were each analyzed for Total Petroleum <br /> Hydrocarbons as gasoline(TPH-G), and benzene, toluene,ethylbenzene, and xylenes(BETX). <br /> TPH-G and BETX were all below the laboratory's limit of detection for these compounds. <br /> The laboratory analysis -reports for these analyses are attached to this letter. <br /> Based on the analytical results of these soil samples, which indicate that TPH-G and BETX. <br /> are at low to nondetectable concentrations, we are requesting an exemption from the <br /> existing soil aeration rules. We plan to continue to stockpile this soil onsite (covered with <br /> plastic sheeting) until next spring, at which time the soil will be moved and spread on the <br /> ground near the current stockpile site. <br /> If you have any further questions, please don't hesitate to call me. <br /> Sincerely yours, <br /> aures Elder, P.E. <br /> Attachments: Soil-laboratory analysis reports <br /> Site map <br /> cc: Linda Turkatte, San Joaquin County Public Health Services, Environmental Health <br /> Dan Barber, Teichert Aggregates <br />