Laserfiche WebLink
w ' <br /> San Joaquin County <br /> Environmental Health Department DIRECTOR <br /> o. c <br /> Donna Heran, REHS <br /> 600 East Main Street <br /> Stockton , California 95202 -3029 PROGRAM COORDINATORS <br /> Robert McClellan, REHS <br /> Jeff Carruesco, REHS, RDI <br /> N�P Websites www.sjgov. org/ehd Kasey Foley, REHS <br /> 4 F o R Linda Turkatte, REHS <br /> Phone: (209) 468-3420 <br /> Fax: (209) 464-0138 <br /> April 13, 2012 <br /> Mr. Steve Beneto <br /> Beneto , Inc. <br /> 4080 Seaport Boulevard <br /> West Sacramento, California 95691 -3417 <br /> Subject: Former Beneto Facility <br /> 749 East Charter Way <br /> Stockton , CA 95202 <br /> Dear Mr. Beneto: <br /> The San Joaquin County Environmental Health Department (EHD) has received and reviewed <br /> Dual Phase Extraction Pilot Test Work Plan (work plan ), dated 06 February 2012 , submitted <br /> by your consulting firm , Apex Envirotech , Inc. (Apex) on your behalf for the above-referenced <br /> site . During a telephone conversation with Apex on 06 January 2012 , the EHD had <br /> recommended submittal of either a corrective action plan (CAP) or a pilot test work plan for <br /> dual phase extraction (DPE) to remediate residual impacted soil and impacted groundwater at <br /> this site. <br /> In the work plan , Apex proposes : <br /> • Conducting a four-day (96-hour) DPE pilot test to extract soil vapor and groundwater <br /> using a high vacuum liquid-ring thermal/catalytic oxidizer mounted on a trailer; <br /> • Extracting soil vapor and groundwater from monitoring wells MW- 1 and MW-5 and <br /> possibly from MW-4 if groundwater removal is not sustainable at wells MW-1 and <br /> MW-5 ; <br /> • Collecting background vacuum data from all wells prior to initiating DPE and daily <br /> vacuum levels thereafter from all monitoring wells without using pressure transducers; <br /> • Collecting background groundwater level data from all wells prior to monitoring <br /> groundwater elevations using submersible pressure transducers inserted in monitoring <br /> wells MW-7 , MW-8 , MW-9 and MW-16 ; <br /> • Measuring static groundwater levels periodically in the remaining wells using a depth - <br /> to-water meter, <br /> • Collecting groundwater and soil vapor samples immediately after beginning DPE <br /> operations and daily thereafter during the four-day pilot test, <br />