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PUBLIC HL'ALTH SERVIC-'-E-1S pQU,N <br /> SAN JOAQUIN COUNTY <br /> i <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Karen Furst, M.D., M.P.H., Health Officer <br /> : <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 4Cl OIR <br /> 209/468-3420 <br /> JESS CERVANTES <br /> P 0 BOX 5008 <br /> STOCKTON CA 95206-0008 <br /> r <br /> t RE: JC TRUCKING Site Code:RO# 0000294 <br /> 1207 ALJRORA STREET ' <br /> STOCKTON CA 95206 <br /> i <br /> WORT{PLAN: Work Plan for Additional Investigation <br /> DATED: 05/12/00 <br /> PREPARED BY: JJW Geosciences,Inc. <br /> I APPROVED <br /> DISAPPROVED <br /> ADDENDUM NEEDED €j Submit bv. June 16,2000 'y <br /> - <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORK PLAN[H&S 25299.37,s4bd(c)(3)]: <br />� 1. Borings beyond 110-feet in depth for evaluation of the vertical extent of the groundwater contamination. <br /> 2. Installation of deep groundwater monitoring wells. <br /> 3. Installation of down-gradient shallow groundwater monitoring wells. jt <br /> i 4. Analysis of soil and groundwater samples for TPHg,71PI-3d,BTEX,MtBE,and seven fuel oxygenates by-EPA <br /> Method 8260. <br /> t , <br /> i <br /> COMMENTS AND CONDITIONS: Submit an addendum to include the following points. <br /> 1. Description of the direct push method you intend to use and the proposed targe depths. Shallow soil and/or; <br /> groundwater data already exists from the north side of Jackson Ave.,no moreis needed at this time. Anyfurther <br /> soil sampling does not need to begin above 40-feet below surface grade (lsg). <br /> 2. Description of how discrete groundwater samples will be collected by using hollow stem auger drilling techniques. <br /> If discrete samples cannot be obtained using hollow stem augers,another.1 must be used. <br /> 3. Addition of at least one deep( 110-feet bsg) boring down-gradient of the current on-site deep-screened MW's. <br /> 4. Replacement of MW-7,which appears to be partially filled with cement grout. <br /> i <br /> DA fly 20o By <br /> ,_, <br /> it <br /> LoriDuncan,Senior REHS(202) 468-0337 <br /> Faxed to <br /> A Division of San Joaquin County Health Care Services <br /> r f <br />