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@2f27/1995 22:13 Z2@98325152 WRIGHT ENVIRONMENTAL_ PAGE 02 <br /> r _ Wright <br /> Environmental <br /> mental <br /> Services, .Inc. <br /> _..��f7�5'17'3ti:�Fff� <br /> October 20, l 99$ <br /> Mr.'host FxAve <br /> San,toaquin C'ounty 1PHSIE 1D <br /> 304 East Wobor Stmt,71 irsl l=irtttr <br /> Sto4Awn, CA 35202 <br /> lac: CoMment RC$01ution -- Work Plan,Site 131ye stitatio"and Spurtir'i 0VQ1 <br /> NeIsnii heady-Mix Silc, 227{}0 State Highway 1P, Ripon.C-alifortua <br /> Dear Mr. Rowe, <br /> It was a plcstsurc tP sinak With you cc-ardi ng your(:otu nieats to Wrlpltt l nuiranrttcrttal's <br /> Work)°Meru7 _Site investi ttim cuxl>Srjrarc e Removat(Work Plan),dated September 28. 1998. <br /> Thar;ii_you for your thorough t+cvicw wid constructive comments- This correspondence <br /> rtddresses iltc three comments olds isioA in your fax corresPondence Of(k10110r 13, 1998- <br /> In;your first,comment,you rcqu"t furtlicr rationale fl;r flet sourec mm.Oval effort, Source <br /> rcmillval is feint; prapn'cd to signific:ssttly rcdur Lhe conii»ued leaching of petroleurn <br /> hy€irocajbons to groundwatcr. The existing and potentiul future impact to groundwater <br /> beneath the site rx)sQx a risk to drinking waLcr supplics bcissg withdrawn from a newly <br /> installed municipal well. located approximatcly 600:cet iram the site. <br /> In your second comment,you request a soil rnarai ement pian for the on-site storitgc, <br /> rlt{:;'actcriaa[itsr xd diSpt sttintt of excRvuted sail. As t tiflined in Sectiol 2 3.5 of the Wail; <br /> 111e1ft,the excavated soil wilt lie screened hof organic vnpQT,4 With u photoioniz$�on dotedor. <br /> Segregated and stockpiled on site, Any clean aveThurtlen w it will be stockpiled separately <br /> I'mm the sic ckpile ni`impacled vt;l, Facli of tho,stm kpiles w ll be bermed for leachate <br /> cnntrol,wnsiructed on pliaslil Akeetitig And covered. According to lir,Russ NtJ5011 <br /> (p,operiv tswt.trr),tlrc first paved arca along the naz l:we tt Side of flm J7mPerty can be urs#for <br /> strrckpiling tltr sail. Tlac stockpil�tes will be characterized as am-cribed in Section 2.3.5 orthe <br /> -wnr;c rtlttd;prs l lt3d.apd i rt3pi r4,cq off-:rite for disposaL <br /> In your third comment,You rcyttest that the presoice ocrcbi • ora be verified and that a <br /> tma,tment plata br prcpar to evaluate.the effectiveness � Oxygen lease <br /> Cmnp(mmd(ORC'.). Prior 0 the savrcc rcinovB1 and ORC trcd#nent,the nn-site 8mm-Awat.cr <br /> monitoring.wclls2ill be su:t�pled, 'Ther monitoring well M- -1 is located appmr4immaly 25 <br /> feet tizntir ,ase limit of the proposed cv;wavatiost. In taidition to the groundwater inonitotittg. <br /> 5 trrtplirt�;and anal},lis s�.Li+€tips+�utlilted its Se:titan 2.c of tlw xllarlk Plan, the grnundwater <br /> bI F. Ift Street + Tracy,CA 451'76 <br /> ytl4,€�3'.U?SSS <br /> Fax 209-83Z.�152 <br /> KrrF.hf@inrery"*.r.Orn Lir_ 945150,1 A-B ifu;:J4ir+ <br /> tiref!cit �??j}:'llHrf!�fhtPdl'.ff.Cr317!Li'?"7S,ri�f <br />