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Now <br /> San Joaquin County <br /> PgUiN. <br /> Environmental Health Department DIRECTOR <br /> yo._ .co Donna Heran, REHS <br /> 600 East Main Street <br /> Stockton California 95202-3029 PROGRAM COORDINATORS <br /> r ° Robert McClellon,REHS <br /> .. Jeff Carruesco,REHS, RDI <br /> • cq .j-. :° Website: www.sjgov.org/ehd Kasey Foley,REHS <br /> F o gd <br /> Phone: (209)468-3420 Linda Turkatte, REHS <br /> Fax: (209)464-0138 <br /> October 11, 2010 <br /> Mr. Charles Skobrak <br /> 9947 East Highway 26 <br /> Stockton, California 95215 <br /> Subject: Larry's Auto <br /> 308 North Grant Street <br /> Stockton, California 95202 <br /> Dear Mr. Skobrak: <br /> The San Joaquin County Environmental Health Department (EHD) has received and reviewed <br /> Remedial Action Work Plan — In-well Air Sparging (work plan), dated 02 September 2010, <br /> prepared and submitted by your consultant, Advanced GeoEnvironmental, Inc. (AGE) on your <br /> behalf for the above-referenced subject site. In the work plan, AGE proposes to install in-well <br /> air-sparging points into extraction wells EW-1 [screened 30 to 50 feet below surface grade <br /> (bsg)] and EW-2 (screened 58 to 73 feet bsg) to remediate the groundwater in conjunction <br /> with the soil vapor extraction (SVE) system connected to EW-1. The EHD had directed the <br /> submittal of a remedial action work plan by letter dated 02 July 2010. <br /> The EHD approves the work plan as submitted. Install the necessary equipment, including <br /> the two in-well extraction chambers into EW-1 and EW-2, and have the in-situ air sparging <br /> (IAS)/SVE system on line by December 2010. If the initial findings from the IAS/SVE are <br /> favorable, then proceed to submit a work plan to install additional extraction wells with in-well <br /> air-sparging points in the southeast area of your site near monitoring wells MW-4, MW-5, and <br /> MW-8 where high concentrations of petroleum hydrocarbon contamination have been <br /> detected in the groundwater. <br /> By letter dated 02 July 2010, the EHD extended the date for submitting a work plan for the <br /> collection of soil gas samples to evaluate the potential threat from vapor intrusion from 01 <br /> June 2010 to 30 July 2010. The EHD has not received this work plan; therefore, the EHD is <br /> directing you to submit this work plan within thirty days of date of this letter. <br /> If you have any questions, please contact Vicki McCartney at (209) 468-9852 or by e-mail at <br /> vmccartney(j�sicehd.com. --- <br />