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10/1712003 14 59 2094683433 FIFTH FLOOR PAGE 02 <br /> f- <br /> ENVMONMENTAL HE. Tu DEPARTMENT <br /> QUIN COUNTY 4 a v SAN JO�, U,rFRSapervtaora <br /> x.1<ieran,RA R S 304 Ee Hugu►sast weber Avenue,Third Fl= Cori gguw,Bmgan,R E , S <br /> ax pereelor MiicR E.H S R D 1. <br /> *' Al Qlaeb,R.EM-5 Stockton,Callfom"a 45242,2708 Douglas W Wilsou,R E H S, <br /> Program MOnager Telephone (209)468-3420 Nlargamt Lagorio,R,E H S <br /> i A dLaurie A Cotulla,R E H SRobert McClellan,R E H S <br /> program Manager �S1K (209)464 a13g Muk Bamelloa,RE H S <br /> Cox a Cox FILE COPY <br /> c/o JANICE B BROW <br /> 3593 ARROWHEAD DRIVE FW ST HELENA CA 94574 <br /> ISE: former Muffler Shop Site Code: 1933 <br /> 595 E. 11�'Street 110#000213 <br /> Tracy. CA., 95376 Clean Up Fund## 009444 <br /> WORK_P_LAN' "Request to Implement Interim Remedial Action (Limited <br /> Excavation MW-3& MW 9)" <br /> DATED: October 10, 2003 <br /> PREPARED BY Wright Environmental Services - Chris Palmer, HG. <br /> T$ ATUS' <br /> APPROVED,with conditions noted !below <br /> ADEQUATE UATE NECLSSARY ELE ENT OF THEW RK PLA S <br /> 25299,37, subd c 3 <br /> • Pressure grout destruction of MW-3 and MVk 4 in preparation for <br /> interim remedial action (soil ever-excavation, to --12' bgs, and <br /> groundwater dewatering) at high source areas continuing to leach <br /> into and degrade shallow groundwater and, <br /> e Temporarily store soil and groundwater at site for characterization, <br /> then transport offsite and, <br /> • import clean fill and backfill pit to existing grade and compaction <br /> and, <br /> • Submit report of findings to EHD. <br /> COMMENTS AND CON ITIPNS <br /> Cement grout pressure-destruction of contaminated monitoring <br /> wells not approved. MW-3 and MW-9 to be over bored to full depth <br /> plus I-foot (18' bgs)and grouted with non-hardening bentonite <br /> material and allowed to stand undisturbed for no less than 48 hours. <br /> No cement grout to be used for these well destructions. <br /> California UST Code of Regulations requires all corrective actions <br /> (Interim remedial action) to enter into public participation prior to <br /> final pian approval. The public is to be notified and allowed a <br /> comment period prior to enactment of the corrective action. This <br /> work plan Is tentatively approved and will be allowed to proceed <br /> once the public has had adequate time to comment. <br />