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PUBLIC HEALTH SERVICES <br /> . <br /> a51, �1 c <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION " ' <br /> Karen Furst, M.D . , M.P.H., Health Officer <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 952( tL E COPY e'< iFOR� P <br /> 209/468-3420 <br /> ROGER HUCKINS JUL 2 4 1998 <br /> 3501 OAKGROVE CIR <br /> STOCKTON CA 95209 <br /> RE : Fernando's' Place Site Code : 505309 <br /> 1201 S . Center St. <br /> Stockton , CA. , 95206 <br /> San Joaquin County Public Health Services , Environmental Health Division <br /> (PHS- END) has reviewed the June 15 , 1998 "Work Plan - Phase 1 Site <br /> Investigation" submitted by Foothill Engineering on June 17 , 1998 and has the <br /> following comments. <br /> PHS-EHD concurs with your consultant's recommendation that additional <br /> monitoring wells should be installed . In addition , PHS- EHD will require the <br /> extent of contaminated soil and groundwater discovered during the April 1998 <br /> subsurface investigation to be delineated . <br /> Groundwater in our area is at an all time high . Identifying the vertical soil and <br /> groundwater plume limits is to include the deepest depth to first groundwater <br /> during the underground storage tank (UST) presence on site. The San Joaquin <br /> County Flood Control Department has recorded this "drought" depth to first <br /> groundwater at 55 feet below ground surface during Fall- 1978. In order to <br /> support conclusions for vertical delineation in the soil and determine if the <br /> groundwater has been impacted by the UST release , laboratory data from two <br /> consecutive five foot soil samples that are non-detect for gasoline are required . <br /> The results of this UST investigation are to include deep discreet soil and <br /> groundwater samples collected from the "drought" depth to first groundwater. <br /> In order to clarify the format for the reports submitted to PHS-EHD , please have <br /> the laboratory and your consultant report_ all soil sample results in "mg/kg" <br /> (ppm). All groundwater samples are to be reported in "ug/P' (ppb). Both <br /> laboratory data sheets and tables included in future reports are to clearly have <br /> these units of measurement noted . Tables included in the previous report have <br /> included soil samples in both "ug/kg" and mg/kg". <br /> A Division of San Joaquin County Health Care Service <br />