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PUBLIC HEALTH SERVICES <br /> SAN JOAQUIN COUNTY =` <br /> JOGI KHANNA M.D.,M.P.H. <br /> Health Officer P <br /> P.O. Box 2009 (1601 East Hazelton Avenue) 0 Stockton, California 95201 <br /> C4C%FORS` <br /> (209)468-3400 <br /> ROBERT ISACKSON /� <br /> K& I ASSOCIATE PARTNERSHIP ( ) JA�2 7 i° 3 <br /> 703 MARKET ST STE 1404 <br /> SAN FRANCISCO CA 94103 <br /> RE: ROYAL OAKS SAVINGS & LOAN SITE CODE 2393 <br /> 510 N MAIN <br /> MANTECA CA <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) has reviewed the <br /> "Quarterly Groundwater Sampling Report" dated September 1992 prepared by WHF Environmental <br /> Consultants, Inc. (WHF) and your letter dated January 14, 1993. <br /> In your letter you state that there has been three consecutive quarters of non-detect results of water <br /> samples from the monitoring wells. Unfortunately this statement is not substantiated by the July 23, 1992 <br /> sample results of monitoring well seven. The September 1992 Quarterly Report by WHF states that they <br /> assume these results to be incorrect but PHS/EHD must take these results into consideration. In addition <br /> monitoring well two evidenced Benzene at 3.1 parts per billion in January 1992. Since that time <br /> PHS/EHD has received results of the April 1992 and the July/August 1992 samplings. <br /> On November 4, 1992 PHS/EHD staff was present during sampling of the monitoring wells. Since the <br /> vapor extraction system was connected to monitoring well two it was not sampled. Sample results from <br /> monitoring well two are critical to our evaluation of this site for closure. <br /> In your letter you also state that vapor extraction of the soil has been completed. PHS/EHD has not <br /> received any reports concerning results of the vapor extraction system. PHS/EHD staff was at the site on <br /> January 15, 1993 and the vapor extraction system was in operation. <br /> PHS/EHD sympathizes with your financial problems but site closure is based on the actual and potential <br /> threat to groundwater quality and with the current information we do not agree with closure for this site. <br /> Quarterly water sampling and reporting should continue. <br /> If you have any questions contact Margaret Lagorio, Senior REHS, at (209) 468-3449. <br /> Jogi Khanna D., M.P.H. <br /> Health O <br /> v <br /> rie A. tulla, REHS, Program Manager <br /> nvironmental Health Division <br /> LAC/ml <br /> c: WHF Environmental Consultants, Inc. <br /> RWQCB <br /> A Division of San Joaquin County Health care Services <br />