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ENVIRONMENTAL HEALTH DEPARTMENT <br /> SAN JOAQUIN COUNTY Unit Supervisors <br /> Donna K.Henan,R.E.H.S. Carl Borgman,R.E.H.S. <br /> ;. 304 East Weber Avenue, Third Floor <br /> Director Mike Huggins,R.E.H.S.,R.D.I. <br /> Al Olsen,R.E.H:S. Stockton, California 95202-2708 Douglas W.Wilson,R.E.H.S. <br /> • �., \P• <br /> Margaret La orio,R.E.H.S. <br /> Program Manager Telephone: (209) 468-3420 <br /> F oR`' Laurie A.Cotulla,R.E.H.S. Robert McClellon,R.E.H.S. <br /> Fax: (209) 464-0138 - Mark Barcellos,R.E.H.S. <br /> Program Manager <br /> i r ... <br /> JOHN JOHNSON <br /> THE CUSTOMER COMPANY <br /> 4457 PARK ROAD <br /> BENICIA CA 94510-1124 <br /> The Customer Company <br /> 15 East Grant Line Road. <br /> Tracy, California <br /> PLANWork Plan for Additional Subsurface Investi anon at Former Cheaper Store #37 <br /> WORKPLAN: <br /> DATED: April 19, 2004 <br /> PREPARED BY: ATC Associates Inc. <br /> APPROVED X <br /> DISAPPROVED <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORKPLAN [health &Safety <br /> Code (H&S) Section 25296.10(c)(3)1: <br /> 1, Advancement of three cone penetrometer testing (CPT) boringthe os. One <br /> o non of be <br /> advanced to approximately 75 feet below surface grade (b g) ? ling <br /> the site for lithological evaluation;data from this boringeused <br /> to select ter sample will be <br /> depths at the remaining two proposed CPT boring Soil andgr <br /> collected at discrete depths from the remaining two CPT borings building. <br /> ed soil sample will be <br /> cent to the <br /> underground storage tanks (UST) and north of the existing <br /> collected at six feet bsg from each of the.three CPT borings. <br /> usin <br /> 2. Advancement of six borings to first encountered water at approximafor conttely six feetamination <br /> nolo to assess <br /> truck-mounted Geoprobe direct push technology groundwater <br /> and delineate the lateral extent of contamination in soil. Three borings will be advanced <br /> on site and the remaining three borings will be advanced off site on Holly Drive. <br /> oundwater samples at the depth groundwater is first encountered <br /> 3. Collection of discreet gr <br /> at each of the six Geoprobe borings. <br /> h of the six 4. Collection of one soil sample for chemical analysis from e leum h Broca bo Geoprobe <br /> gs <br /> using the <br /> during continuous coring; soil samples with detected petro y <br /> photoionization detector or visual inspection will be sent to a California certified <br /> environmental laboratory for analysis. <br /> i <br /> i <br /> i <br />