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PUBLIt HEALTH SER,ICES <br />.0 <br />SAN JOAQUIN COUNTY /".•. ".1, • vy <br />JOGI KHANNA M.D., M.P.H <br />Health Officer <br />P.O. Box 2009 • (1601 East Hazelton Avenue) • Stockton, California 95201 173 <br />(209) 468-3400 <br />I • <br />HARRY AND BG TRS <br />PO BOX 2657 <br />NEWPORT BEACH CA 92663 <br />Re: Well Sample Results <br />2817 N Cherryland <br />Stockton CA 95215 <br />OCT 1 1993 <br />With the permission of your property manager, San Joaquin County Public Health <br />Services, Environmental Health Division (PHS/EHD) sampled the well located above for <br />several organic compounds. <br />Enclosed is a copy of the analytical results documenting detection of the organic <br />compound known as 1,1 Dichloroethane. The State Department of Health Services <br />(DHS) has adopted standards for public drinking water systems, however, private well <br />owners are not legally required to meet this standard. For comparison, PHS/EHD has <br />included the DHS maximum contaminant level (MCL) standard for the contaminant <br />which was detected in the sample collected from your well. <br />Result MCL <br />1,1 Dichloroethane 1.1 ppb 5 ppb <br />PHS/EHD is overseeing the investigation of the former underground fuel storage tank <br />located at 4648 E. Waterloo Road. During the course of groundwater monitoring, <br />organic compounds, like 1,1 Dichloroethane, were detected in the public water supply <br />well serving the tenants in the Marlowe Business Park. PHS/EHD, with the cooperation <br />of the various neighboring residences and businesses, conducted a well survey and has <br />initiated the laboratory sampling of neighboring wells in an attempt to identify impacted <br />drinking water wells. <br />PHS/EHD will continue to monitor the groundwater investigation and we are hopeful <br />that the limits of the impact area will soon be known. <br />In this instance, your private well analysis did not exceed the DHS maximum <br />contaminant level standard for 1,1 Dichloroethane. However, any of the following <br />recommendations may be implemented as a precautionary measure to prevent the <br />potential exposure to this well: <br />A Division of San Joaquin County Health Care Services l()