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Sent By: RWOCB; 2553015; Apr-27 0:38AM; Page 212 <br /> .� California Regional Water Quality Control Board <br /> Central Valley Region { <br /> Steven T.Butler,Chair Gray Davis <br /> Winston H.Hickox Govrrnor <br /> Seerunryfoe Sacramento Main Office <br /> LavImn.wWal Internet Addmw hllp-//www.awrcb.ce.govirw(ICt'5 <br /> Protection 3443 Routier Road,Suite A,summon,Calirumia 95627-3003 <br /> Phone(416)255-3000•FAX(916)25S-3015 Y g wr T- <br /> 27 April 2000 <br /> Durhim Ali Jubari Nagi Saleh-Ali Mohamed&lluda Gubary <br /> 667 O'Farrell Street#10 PO Box 1322 25 poncetla Drive#201 <br /> San Francisco,CA 94109 Riverbank,CA 95367 Daly City,CA 94015 <br /> APPROVAL OF WORKPLAN FOR SOIL AND GROUNDWATER ASSESSMENT; <br /> RANCH MARKET, 23569 SOUTH SANTA FE ROAD,RIVERBANK,SAN JOAQUIN COUNTY <br /> We received your 25 April 2000 Revised Workplan for Sail and Groundwater Assessment(Vvrkplan)prepared <br /> by Secor international incorporated(Secor). Secor proposes to complete an initial soil and groundwater <br /> investigation as Phase 1 of their site assessment,and complete monitoring well installation as Phase 2 of their site <br /> assessment. The Phase 1 investigation will include: <br /> • Collect and analyze soil and groundwater samples from two continuous core borings and three <br /> direct-push borings(base the depth of continuous corc borings on off-site domestic well I)W-2)- <br /> •, Prepare a letter report to include soil and groundwater analytical data, cross sections,revised locations <br /> of proposed monitoring wells and well screen intervals. <br /> The Phase 2 investigation will include installing one deep and four shallow monitoring wells. A sensitive <br /> receptor survey will also be completed. <br /> The Workplan is approved with the following comments: <br /> • Collect continuous core samples at the two deep soil borings starting at 10 feet below ground surface. <br /> • Complete a fourth direct-push soil boring approximately 10 feet north of domestic well DW-3. <br /> • Collect a groundwater grab sample from the total depth of each of the soil borings, and analyze for site <br /> constituents by EPA Method 826013- <br /> The deep groundwater monitoring well may be installed using an alternative drilling method with care <br /> taken to prevent cross-contamination of deeper water bearing units. <br /> Please contact Mr. Mike infuma at San Joaquin County Environmental Health Division and me at least two <br /> business days prior to any site work to schedule! field inspection appointment. If you have any queslio�ase f <br /> call me at(916) 255-3115. rl/��N► <br /> P ASPA rl^i <br /> Marty Hartzell <br /> Associate Engineering Geologist <br /> cc: Ms.Wennilyn Pun,UST Cleanup Fund,State Water Resources Control Board, Sacramento <br /> Mr.Mike Infuma, San Joaquin County Environmental Health Division, Stockton <br /> Mr.JaffAuchterlonie, Secor international incorporated, Sacramento APPROVED <br /> Author <br /> California Environmental Protection Agency Senior. <br /> Recycled Paper <br />