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Jogi Khanna, <br />Health Offi <br />P--€1 <br />PUBLI <br />• <br />C HEALTH SERVICES <br />SAN JOAQUIN COUNTY <br />JOGI KHANNA M.D.M.P H. <br />Health Officer <br />P.O. Box 2009 • (1601 East Hazelton Avenue) • Stockton, California 95201 <br />(209) 468-3400 <br />DONNA SANTINI GARDNER <br />1206 STRUCK <br />ORANGE CA 92667 <br />RE: Donna Gardner Property <br />26056 Thornton Road <br />Thornton, CA 95686 <br />AUG 1 1992 <br />SITE CODE: 1864 <br />San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) has completed <br />review of the "Soil Remediation Plan" dated July 22, 1992 prepared by RESNA. PHS/EHD has the <br />following comments for your consideration. <br />PHS/EHD agrees that the excavation of hydrocarbon contaminated soil is an effective method of <br />remediation. <br />Confirmation soil samples should include analysis of total lead and soluble lead. If the levels of total <br />lead exceed 13 ppm, proceed with analysis of soluble lead using the waste extraction test. Deionized <br />water should be used as the extraction solution for the waste extraction testing in lieu of the acid <br />extraction solution. This procedure yeilds results more indicative of the amount of soluble lead present <br />under normal site conditions. <br />Additional confirmation soil sampling may be required depending on the final volume of the excavation. <br />A minimum of five confirmation soil samples will be required, four from the sidewalls and one from the <br />bottom. A minimum of one sample every 20 linear feet is required as confirmation sampling. Stockpile <br />characterization, for remedial treatment selection, should include one discrete soil sample per 50 cubic <br />yards which may be lab composited 2:1. Please schedule the excavation by August 29, 1992. <br />Pursuant to Section 2652(d) of the Underground Storage Tank Regulations, a quarterly monitoring <br />report shall be submitted to PHS/EHD and the Central Valley Regional Water Quality Control Board <br />(CVRWQCB) until the investigation and cleanup of the site is deemed adequate. Initiate quarterly <br />sampling immediately. The last quarterly sampling occurred March 4, 1992. PHS/EHD informed RESNA <br />and your attorney, Mr. Hoslett that the nearby Thornton Municipal Well #2 should also be sampled. <br />Schedule the next quarterly sampling event by August 29, 1992. Please provide PHS/EHD and the <br />Utilities Maintenance District 48 hours notice prior to sampling. <br />If you have any questions or to schedule a site inspection, please contact Mary Meays, REHS, of my staff <br />at (209) 468-0337. <br />1‹, M.P.H. <br />z aurie A. Cotulla, ItEHS, Program Manager <br />/ Environmental Health Division <br />/ LAC/MM:lb <br />c: Elizabeth Thayer, CVRWQCB c: John Lane, RESNA <br />c: Al Hoslett, Wilson, Hoslett and Whitridge c: Ron Rall, SJCUMD <br />A Division of San Joaquin County Health Care services