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r <br /> PUBLIC HEALTH SERVICES <br /> SAN JOAQUIN COUNTY ?, <br /> JOGi KHANNA M.D.,M.P.I . <br /> Health Officer p <br /> • ) • Stockton,California 95201 c4 i k o'�t <br /> P.O. Box 2009 (1601 East Hazelton Avenue <br /> (209)468-3400 <br /> MR FRANK HUBBARTi <br /> LINDEN SCHOOL DISTRICT <br /> LINDEN UNIFIED SCHOOL DISTRICT <br /> 18527 E MAIN ST APR 2 7 199 <br /> LINDEN CA 95236 <br /> RE: Waterloo Elementary School SITE CODE: 1710 <br /> 7007 N. Pezzi Rd. <br /> Linden, CA 95236 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) has reviewed <br /> activities to date at the above mentioned site. <br /> On November 11,1989 a 500 gallon regular gasoline tank was removed under PHS/EHD inspection. Sampling <br /> beneath the tank revealed soil contamination. On September 13, 1990, three soil borings and a vapor <br /> extraction well were constructed and soil was found to be contaminated as deep as 80 feet. (Sample L/W5- <br /> 5131- 80.5 feet - .12 ppm Benzene, .42 ppm Toluene, .65 ppm Ethylbenzene, 1.37 ppm Xylene and 3.5 ppm <br /> TPH-Gasoline.) <br /> Please be advised that per"San Joaquin Flood Control Maps" (Spring 1986),seasonal high groundwater is 85 <br /> feet below ground surface(BGS). Since notable contamination has been found below 80 feet, a groundwater <br /> investigation is required. <br /> A workplan shall be submitted to PHS/EHD by May 28, 1993 for monitoring well construction. <br /> If you have any questions, contact Michael Collins, REHS, of my staff at (209) 468-0338. <br /> Jogi Khanna, M. ,W.P.H. <br /> Health Officer � <br /> ` <br /> urie A. Cotulla, RENS, Program Manager <br /> Environmental Health Division <br /> /LACIMC:lb <br /> c: CVRWQCB <br /> A Divisum of',an Joaquin County Hmith rare Smiccs <br />