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PUBLrC HEALTH SERVICES <br /> SAN JOAQUIN COUNTY ;' 's <br /> JOG[KHANNA M.O.,M.P.H. <br /> Health Officer p <br /> P.O. Boat 2009 • (1601 East Hazelton Avenue) Stockton, California 95201 a <br /> (209) 468-3400 <br /> RON TAMOUSH <br /> A T & T COMMUNICATIONS INC {-: <br /> 4430 ROSEWOOD RM 3692 CCr. :_ APR 0 7 1992 <br /> PLEASANTON CA 94566 � ,./ <br /> RE: J 110 W. Turner Rd. SITE SITE CODE: 1741 <br /> Lodi, CA <br /> San Joaquin County Public Health Services, Environmental Health <br /> Division (PHS/EHD) has recently reviewed the report prepared by <br /> Environmental Science and Engineering, Inc. (ESE) titled <br /> "Documentation of November 1991 Groundwater Sampling" for the <br /> above referenced site. Groundwater contamination has been <br /> confirmed. Water sample results from monitoring well 3 evidenced <br /> 0. 9 parts per billion (ppb) of Toluene and 1.5 ppb of total <br /> Xylene. <br /> Groundwater contamination has been documented in previous <br /> reports: Water sample results from monitoring well 2 (1. 3 ppb <br /> Benzene, 0. 8 ppb Toluene) in February 1991. <br /> Soil Sample results from boring B-2Y performed October 31, 1990 <br /> revealed soil contamination exists at 110 parts per million 14 <br /> feet below ground surface (C.T. Laboratory I.D. 102134--4) . This <br /> contamination was supported by ESE's boring log description at 14 <br /> feet. Unfortunately, this boring was not continued and sampled <br /> to further define the extent of vertical contamination. <br /> For the above reasons, PHS/EHD can not consider this site for <br /> closure at this time. In addition, if an upgradient offsite <br /> contamination source has contributed to groundwater <br /> contamination, as referenced in E.S.E. 's latest report, that <br /> source must be identified and the contamination migration proven. <br /> If you have any further questions regarding this matter, contact <br /> Harlin Knoll, RENS, of my staff at (209) 468-3442 . <br /> Jogi Khan a, M.D. , M.P.H. <br /> Health, f icer <br /> f. <br /> curie A. Cotulla, REHS, Program Manager <br /> environmental Health Division <br /> LAC/HK: lb <br /> c. ESE <br /> 4090 Nelson Ave. Suite J <br /> Concord, CA 94520 <br /> A Division of San Joaquin County Health fare Services <br />