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ENVIRONMENTAL HEALTH DEPARTMENT <br /> +N SAN JOAQUIN COUNTY Unit Supervisors <br /> Carl Borgman,R.E.H.S. <br /> r:' ^ Donna K.Heran,R.E.H.S. 304 East Weber Avenue,Third Floor Mike Huggins,R.E.H.S.,R.D.I. <br /> Director Douglas W.Wilson,R.E.H.S. <br /> 1�? 3;i . Al Olsen,R.E.K. . Stockton, California 95202-2708 <br /> P Program Manager Telephone: (209) 468-3420 Margaret Lagorio,R.E.H.S. <br /> �.., ...1 Robert McClellon,R.E.H.S. <br /> 9I FORK Laurie A.Cotulla,R.E.H.S. Fax: (209) 464-0138 <br /> Mark Bareellos,R.E.H.S. <br /> Program Manager <br /> RAYMOND GREER ALBERT & WANDA VELDSTRA <br /> RAYMOND GREER CONSTRUCTION 15634 STEINEGUL RDESCALON CA 95320 <br /> 1111 IT ST <br /> ESCALON CA 95320 <br /> Re: RAYMOND GREER CONSTRUCTION <br /> Site Code: 2021 <br /> 15634 STEINEGUL RD <br /> ESCALON CA 95320 <br /> WORKPLAN: Intexim Remediation Plan DATED:March 25 2004 <br /> WORKPLAN: Addendum to Interim Remediation Plan DATED:April_92004 <br /> PREPARED BY: ATC Associates Inc. <br /> APPROVED See Below <br /> ADEQUATE AND / NECESSARY ELEMENTS OF THE WORKPLAN (H&S <br /> 25299.37,subd.(c)(3).): <br /> 1. Install a vapor extraction well screened from 50 to 60 feet below surface grade (bsg) to <br /> supplement the 3 existing vapor extraction well as a part of the soil vapor extraction system. <br /> 2. Install, operate, and maintain a soil vapor extraction system (SVE) to remediate the <br /> contamination in the vadose zone. <br /> 3. Install 3 air sparge wells screened from 90 to 95 feet bsg,and an air sparge system to <br /> remediate the dissolved contamination in the groundwater. (See Comments and Conditions <br /> below) <br /> COMMENTS AND CONDITIONS: <br /> 1. EHD requests that the installation of the air sparge wells and air sparge system be <br /> postponed for the time being. EHD would like to observe the effect,if any,of the SVE <br /> system on the dissolved phase of the contamination in groundwater. This postponement <br /> will also minimize potential migration of the dissolved contamination toward the existing <br /> domestic well by the effect of the air sparge system. Installation of the air sparge wells and <br /> air sparge system may be required by EHD at a later date based on future quarterly <br /> groundwater sampling reports. <br /> 2. Implement the proposed work by June 8,2004. Submit appropriate permit application and <br /> fee to EHD in advance. <br /> REASONS FOR DISAPPROVAL OF THE WORK" (H&S 25299.37,subd.(C)(3).): <br /> None <br /> /� C <br /> DATED Anril 23 2004_BY A�4 / <br /> C: CRWQCB,Central Valley Region—Jaynes L.L.Barton,RG <br /> C: ATC and Associates,Inc.—Drew Van Allen <br />