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�trol Board �`^"°`"s:; <br /> CaliforieRegional Water Quality ''A°A <br /> Central Valley Region P ¢ <br /> Katherine Hart, <br /> Chair c m= <br /> California 95670-6114 Edmund G.Brown Jr. <br /> 11020 Sun Center Drive,4200•Rancho Cordo 464-4645 RECEIVED����� <br /> (916) 1 #20 91 •FAX(916) LACI <br /> Matthew Rodriquez http'.llwww.waterboards.ca.90vlcentreI alley , <br /> Se"eta"for 1 <br /> p 7 ZQ2011Environmentai Proteclion OCT1. D <br /> 20 October 2011 ENVIRONMEN`ALHEALTH <br /> PERMIT/SERVICES <br /> James Ritchie and Greg McIver <br /> The Source Group, Inc. <br /> 751 Laurel Street, Suite 722 <br /> San Carlos, CA 94070 <br /> DOCUMENT REVIEW FOR EAR ACCOUNT CASE#N JOAQUIN COUNTY 0-1 0, FLA 2)CITY CHEVRON, <br /> 6421 CAPITOL ROAD, LODI, SA <br /> received as an email attachment on <br /> The Workplan proposes the destruction of five <br /> I reviewed the Well Destruction Work Plan (Workplan), <br /> (CMT) monitoring wells (MW 8A/B/C, MW-9A/B/C, MW-10A/B/C/D/F, <br /> 19 October 2011 from The Source Group, Inc. (TSGI). <br /> continuous multi-chamber tubing ( Prior to grouting the CMT <br /> MW-11 A/B/C, and M Wed by w//Cel wireline explosive destruction and lover-drill ng. 150' below ground surface <br /> by first grouting, folio <br /> ro riate explosion suppression device will be applied at the <br /> outside chambers, a detonation cord will be inserted in the CMT center chamber with explosives <br /> located at each screened interval. An After detonation of the wireline explosive, an attempt will be <br /> surface after sealing the CMT casing. <br /> made to over-drill the collapsed wells by hollow stem auger to total depth of each well, and grout the <br /> boring by tremie pipe to surface. The work will be <br /> ductand d under <br /> San <br /> AwJoaquin County <br /> report will <br /> Environmental Health Department (SJCEHD) p <br /> be submitted within three weeks of receipt of final bill of lading for disposal of investigative derived soil <br /> and groundwater wastes. <br /> The Workplan complies with the Cost Proposal tasks approved by my letter dated 19 July 2011. <br /> The Workplan is necessary and appropriate to properly abandon CMT wells prior to case closure, and <br /> is approved. TSGI shall ensure that all safety protocols will be followed per the updated Health and <br /> Safety Plan, and the work will be in compliance with applicable requirements and licensing from <br /> Federal and State agencies. Please provide the SJCEHD and myself at least three working days' <br /> notice prior to initiating fieldwork so that both agencies may be present, and contact me by phone at <br /> (916) 464-4614 or by email at ihartonaterboards.ca.eov if you have questions. <br /> /�.4, k-V <br /> James L.L. Barton, P.G. <br /> Engineering Geologist <br /> UST Enforcement Unit II <br /> cc: Pearl Cross, State Water Resources Control Board, UST Cleanup Fund <br /> Conrad Cewts, OGS, Rea/Estc?te DiUS%OR 707 3 St., west Sacramento 95505 <br /> Michael Infurna, San Joaquin County EnvironMental Hea <br /> IthDeparVpgp(, SCO�kfO� <br /> California En -ronmentalPrate <br /> .cGhon Agent, <br /> 9.4 Recycled Paper <br /> I <br />