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i <br /> PUBLIC H k- A LTH SERVICES ,oPa. o <br /> SAN JOAQUIN COUNTY a P <br /> -s { <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Karen Furst, M.D., M.P.H., Health Officer <br /> �IFOR <br />' 304 East Weber Avenue, Third Floor • Stockton, CA 95202 <br /> 209/468-3420 <br /> ,MAY 2 9 200 <br /> CRAIG OGATA <br /> COUNTY OF SAN JOAQUIN <br /> a 1772 SCOTTS AVE <br /> STOCKTON CA 95206 <br /> RE: SAN JOAQUIN COUNTY COURTHOUSE Site Code: 1285 <br /> 222 E WEBER AVE <br /> STOCKTON,CA 95202 <br /> San Joaquin County Public Health Services,Environmental Health Division(PHS/EHD)has reviewed the <br /> "Preliminary Investigation and Evaluation Report"dated April 16, 2001 prepared by Ramage <br /> Environmental on your behalf. Based on the work completed in this report,PHS/EHD agrees that further <br /> site investigation is necessary to determine the extent of groundwater contamination. Soil and groundwater <br /> samples were collected from three soil borings completed on site to�depths.of 20 feet. Concentrations of <br /> 36,000 micrograms per liter(pg/1)of total petroleum hydrocarbons las gasoline(TPH-g)and 25 gg/1 of <br /> methyl tertiary butyl ether(MtBE)were measured in a grab ground',water sample collected from boring B-2. <br /> a At least one additional soil boring must be completed at the site in the vicinity of B-2 using either cone <br /> ;l penetrometer technology or a continuous core sampler in order to define the site lithology and vertical <br /> extent of soil contamination. Additionally,monitoring-wells need to be in at the site to monitor. <br /> groundwater and establish the gradient and direction of groundwater flow. <br /> A work plan to delineate the vertical and lateral extent of impacted'soil and groundwater and install <br /> monitoring wells should be submitted to PHS/EHD by July 16, 2001. P1e'ase contact Sam Savig,EHS at <br /> (209)468-3453 if you have questions regarding this letter. Additionally,please call Margaret Lagorio at <br /> (209)468-349 or Dot Lofstrom at(209)468-3436 to arrange a meeting in-order to discuss all San Joaquin <br /> County sites that are currently under investigation. <br /> t <br /> Donna Heran,REHS,Director <br /> Environmental Health Division <br /> Sam Savig,EHS Dot Lofstrom,RG <br /> LOP/Site Mitigation Unit IV LOP/Site Mitigation Unit IV <br /> cc: Marty Hartzell-CVRWQCB <br /> Joseph Ramage-Ramage Environmental <br /> f <br /> A Division of San Joaquin County Health Care Services <br /> I <br />