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PUBLIC hEALTH SERV ICES <br /> J Q oPa . . . N. <br /> SAN OA UIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION h <br /> Ernest M. Fujimoto, M. D., M.P.H., Acting Health Officer <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 952 0 • `q<; F oRa`" <br /> 209/46&3420 <br /> UNI 61997 <br /> RAYMOND FARMER <br /> 3810 FOURTEEN MILE DRIVE <br /> STOCKTON CA 95219-3809 <br /> Re: Former Toyota Town Site Code: 1151 <br /> 610 North Hunter Street <br /> Stockton CA 95202 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) has completed review of <br /> the "Workplan for Subsurface Investigation" dated May 27, 1997 and prepared by Smith Environmental <br /> Technologies. PHS/E1-ID has the following comments for your consideration and response. <br /> The work plan proposed the drilling and sampling of seven soil borings, three of which would be converted into <br /> monitoring wells. The work plan indicated that only two samples from each boring would undergo laboratory <br /> analysis. Additional sample analysis may be required in order to characterize the vertical and horizontal distribution <br /> of the remaining soil contamination. The work plan also specified from which borings that oil and grease (EPA <br /> Method 418. 1), PCB (EPA Method 8080) and VOC's (EPA Method 8010) analyses would be performed. <br /> As you are aware, the tanks were removed from a common excavation pit, and actually only one sample underwent <br /> EPA Method 8010 analysis and it was collected from beneath one of the gasoline tanks. Since chlorinated <br /> compounds have been evidenced, it may be necessary to submit additional samples for EPA Method 8080 and EPA <br /> Method 8010 analysis. PHS/EHD recommends that EPA Method 8015M be used for TPH-oil analysis rather that <br /> EPA Method 418. 1 . Once field activities are completed and prior to submittal of the soil samples to the laboratory, <br /> PHS/EHD must be contacted to discuss which samples will undergo analysis. <br /> The summary report should include a table with all soil and groundwater sample results obtained from the site and <br /> any recommendations for further investigation and/or remediation. Please contact the State Water Resources Control <br />'f Board Cleanup Fund Unit to obtain pre-approval. Please also contact PHS/EHD at least two work days prior to <br /> initiating field activities so that inspections may be scheduled. <br /> If you have any questions, comments or wish to schedule field inspections, please contact me at (209) 468-0337. <br /> Donna Heran, Director, REHS <br /> Environmental Health Division <br /> Mary Meays, Senior REHS Margaret agorio, REHS <br /> Site Mitigation Unit Supervisor <br /> cc: Elizabeth Thayer, Central Valley Regional Water Quality Control Board <br /> f cc: Ismael Jacob, State Water Resources Control Board Cleanup Fund Unit <br /> cc: Drew Van Allen, Smith Environmental Technology (w/ permit enclosed) <br />'r. <br /> j A Division of San Joaquin County Health Care Services <br />