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ENVIRONMENTAL HEALTH DEPARTMENT <br /> SAN JOAQUIN COUNTY <br /> so 'E'.coc Unit Supervisors <br /> _ �'• ?� Donna K.Heran,R.E.H.S. Carl Borgman,R.E.H.S. <br /> Director 304 East Weber Avenue, Third Floor Mike Huggins,R.E.FI`S.,R.D.I. <br /> Al Olsen,R.E.H.S. Stockton, California 95202-2708 Douglas W.Wilson,R.E.H.S. <br /> • cq, ;....`P.� Program Manager Telephone: (209) 468-3420 Margaret Lagorio,R.E.$.S. <br /> tiFoaN Laurie A.Cotulla,R.E.H.S. Robert McClellon,R.E.jt.S. <br /> Program Manager Fax: (209) 464-0138 Mark Barcellos,R.E.H.S. <br /> Lorre Islas <br /> City of Stockton <br /> 425 North E1 Dorado, Room 301 <br /> Stockton, CA 95202 <br /> John Chase <br /> Chase Chevrolet Company <br /> PO Box 8349 <br /> Stockton, CA 95208 <br /> RE: FORMER CHASE CHEVROLET FACILITY <br /> 424 VAN BUREN <br /> STOCKTON,CA 95203 <br /> WORKPLAN: Well Destruction Work Plan DATED: December 23,2003 <br /> PREPARED BY: Treadwell&Rollo <br /> yl APPROVED with Conditions(See Below) <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORKPLAN (H&S 25299.37,subd.(c)(3).): <br /> Destruction of all monitoring wells,soil vapor extraction wells,and ozone sparge wells on site in anticipation of <br /> subsurface demolition. <br /> COMMENTS AND CONDITIONS: <br /> 1. Wells must be destroyed by over-drilling and grouted with neat cement. Destruction by pressure <br /> grout on this site as proposed in the work plan is not approved. <br /> 2. Selected wells must be replaced within six months of destruction(2 monitoring quarters). If <br /> replacement of the monitoring wells could not be implemented due to structural obstruction or <br /> on-going site redevelopment work,alternative technology to collect groundwater samples and <br /> provide monitoring data of the groundwater contamination plume must be implemented. <br /> 3. Well destruction permit has been issued(SR 36925). EHD staff must be present at the time of <br /> well destruction. <br /> 4. The cost of replacement of the monitoring wells,or portions of the cost of using different <br /> technology to obtain groundwater samples as an alternative to monitoring wells,might not be <br /> eligible for reimbursement from the State Underground Storage Tank Clean Up Fund. <br /> REASONS FOR DISAPPROVAL OF THE WORKPLAN(H&S 25299.37,subd.(C)(3).): <br /> None C <br /> DATED Febmary 13 2004 BY 1 'v <br /> C: Treadwell&Rollo— David Dixon,RG <br /> C: RWQCB,Central Valley Region—James L.L.Barton,RG <br />