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ENVIRONMENTAL HEALTH DEPARTMENT <br /> SAN JOAQUIN COUNTY <br /> fit4 Donna K.Horan,R.E.H.S. U�rirSr, nisars <br /> DFrecror 304 East Weber Avenue, Third Floor Carl Borgman,R.E.H.S. <br /> Al Olson,R.E.H.S. -Stockton, California 95202-2708 Miko I-lugbins,&E.H.S.,R,D1 <br /> • c"-, Pro rmrr rLlai�a cr' <br /> Telephone: (209} 46$-3420 Douglas W.Wilson.R.E.H.S. <br /> 4t)FORe�` 8 $ orio.R.L.H.S,Lagaret <br /> Lourie 1.CoIulin,R.E.I<i.S. Margaret S <br /> Program Manager Fax: (209).464-0138 Robern McClcllon,R.E.H.S. <br /> Mark Barccllos,R.E.H.S. <br /> _,. <br /> LIZ SEWELL I <br /> CONOCOPHILLIPS .v�Y 0 3 U11 IS i , <br /> 76 BROADWAY <br /> SACRAMENTO CA 95818 '.- ................ 1 <br /> RE: ConocoPhillips Service Station' No. .'11193 Site Code:1129 <br /> 3202 West Haaaner Lane <br /> Stockton, CA 95209 <br /> WORKPLAN: Addendum to Revised Interim Remedial Action <br /> Plan and Work Plan 'for Ozone Sparge Well <br /> Installation :and Additional Off-Site Assessment~ <br /> DATED: March 29, 2004 <br /> E1 <br /> PREPARED BY: Secor International. Incorporated: IJ <br /> STATUS: APPROVED with conditions noted below: <br /> ADEQUATE. AND NECESSARY ELEMENTS OF THE WORKPLAN .[Health & <br /> Safety Code (H&S) Section 25296.10 (c) (3)1 : <br /> • Advancement of two cone penetrometer testing (CPT) borings <br /> to define subsurface stratigraphy below 50 feet below <br /> ground surface (bgs) to 'a maximum depth of 120 feet bgs or <br /> until refusal is encountered. Based on the results of the <br /> CPT borings, one to three grab groundwater samples will be h <br /> collected from permeable intervals from a borehole <br /> advanced adjacent to each CPT boring to evaluate potential <br /> dissolved phase contamination in deeper groundwater R <br /> 'i bearing zones. <br /> EE , <br /> 'k <br /> i EI <br /> - �1 <br /> 1 <br /> E: <br /> ' 1p <br />