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PUBLIC (,1EALTH SERN4CES oPaU,N 3 <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION y T < <br /> Ernest M. Fujimoto, M. D., M.P.H., Acting Health Officer <br /> 304 E. Weber Ave., Third Floor • P. O. Box 388 • Stockton, CA 95201-0388 c4�fFoa`' P <br /> 209/468-3420 <br /> i �1¢ <br /> WILLIAM WATKINS . c <br /> PAIGES TOWING MAILED MAR 13 1996 <br /> 645 RIALTO <br /> VACAVILLE CA 95688 <br /> RE: 1807 DOUGLAS SITE CODE: 1078 <br /> STOCKTON CA <br /> San Joaquin County Public Health services, Environmental Health Division <br /> (PHS-EHD) has completed the review of the Preliminary Investigation and <br /> Evaluation Report dated January 1996, submitted by Advanced <br /> GeoEnvironmental, and has the following comments for your consideration. <br /> The results of the recent field work presented in the report show limited soil and <br /> groundwater contamination around the tank complex area. The report . <br /> recommends the installation of three on-site and one off-site monitoring wells to <br /> monitor the groundwater plume identified at the site. This recommendation <br /> appears to be appropriate at this time with the following modifications. <br /> • Due to the presence of contamination in the groundwater near the tank <br /> complex area, a survey of wells within a 2000 feet radius of the site <br /> must be performed. <br /> • The installation of an off-site well .may be premature at this time. PHS- <br /> EHD recommends relocating this data point to the area near the tank <br /> complex which showed the highest levels of contamination during the <br /> investigation. Information from this well will be used to determine the <br /> volume of groundwater impacted and will provide essential data for the <br /> evaluation of remedial alternatives-for this site. <br /> • All of the wells installed at the site should be designed to allow for the <br /> dual purposes of groundwater monitoring and vapor extraction testing. <br /> This type of installation can be followed immediately by a vapor <br /> A Division of San Joaquin County Health Care Services <br />