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�.r San Joaquin County DIRECTOR <br /> Pa N Donna Heran,REHS <br /> Environmental Health Department ASSISTANT DIRECTOR <br /> _ y 600 East Main Street Laurie Cotulla, REHS <br /> '•; T `r. Stockton, California 95202-3029 PROGRAM COORDINATORS <br /> Carl Borgman,REHS <br /> cq �P Mike Huggins,REHS, RDI <br /> /FORS' Website: www.sjgov.org/ehd Margaret Lagorio,REHS <br /> Phone: (209) 468-3420 Robert McClellon,REHS <br /> Fax: (209) 464-0138 .teff Carruesco,REHS,RDI <br /> Kasey Foley,REHS <br /> THOMAS O'NEILL <br /> PO BOX 923 <br /> STOCKTON CA 95201 <br /> RE: Valley Motors Site Code: 1166 <br /> 800 E. Main St. RO#: 594 <br /> Stockton, CA 95202 CUF#: 12540 <br /> WORKPLAN: Air Sparging Pilot Test <br /> DATED: April 20, 2007 <br /> PREPARED BY: Victor Cherven, R.G. <br /> STATUS: APPROVED with conditions noted below. <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORKPLAN [Health & <br /> Safety Code (H&S) Section 25296.1 0(c)(3)1: <br /> • Utilize existing monitoring and vapor wells to inject and monitor <br /> surface air injection test as required by the SJCEHD. <br /> • Collect and analyze one vapor sample from each observation well <br /> and analyze for Total Petroleum Hydrocarbons (8015m) and volatile <br /> aromatic and hydrocarbons (8260). <br /> • Modify existing SVE unit on site for air injection. <br /> • Submit a report of finding to the SJCEHD. <br /> COMMENTS AND CONDITIONS: <br /> • Monitoring well "VM-1" was not designed as an air sparging well and <br /> may not fully test the potential of IAS at this site. If injecting air into <br /> the subsurface thru VM-1 is not successful, the SJCEHD will require <br /> the installation of an air injection well designed specifically for and <br /> located in the core area as initially required. <br /> REASONS FOR DISAPPROVAL OF THE WORKPLAN [H&S Section <br /> 25296.10(c)(3)1: <br /> • none. � <br /> DATED: c`/ tc&:r— BY Ll <br /> Michael Inf rna, REHS. (209) 468-3454 <br /> cc: CVRWQCB – James L. Barton, Sacramento. <br /> SWRCB – CUF – Mark Owens, Sacramento. <br /> Upgradient Envir. – PO Box 8002 Stockton. <br />