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MOW-42-99 04 :90 PM FRANK'S ONE STOP 2092390552 P. 02 <br /> FR <br /> P_ 1 <br /> CR0TNb ZFRU A.'�TAU SLS. INC. <br /> 8eralopy,f'aWor>gt�9g32Q � '. '•, , <br /> 7ekphoauer X09}R3if-!i�$� L� <br /> Facsiedkr ta1i9)ti4g.gg� ' � �"'1 <br /> ENVIRONMENTAL HEALTH DMSf�rlSt� 9 <br /> 304 E.Weber Ave.Third Floor <br /> (Mobor 12. 1999 P O,Box 398.S ogftn CA 952ot-o3$g <br /> Apprunnad . <br /> My- Harks Knoll De!"' d <br /> Sl ar nviJe+onWrnuei�naaC►i uy Public Hatth Senices Cmtdti s & <br /> -y— <br /> , Ow'> <br /> R"- Ith <br /> Division <br /> 104 East Weber Avenuk Third Floor <br /> Stm-kion,CA SIM <br /> Subject: Workplan for Additional Subsume Inves4ttion Norah of l4'ell IM4V3 <br /> 1140 W. KMMIer JAM,Stockton, Csliforaria <br /> Dw Mr.knoll: <br /> This l+eew rvWrt is submitted to present a proposed workplan to conduct additimal aubsur ace <br /> investigation at the referenced site(Figure 1)in arcordpnCC with a written svgtwot by Mr, Harlin Kn4plf of <br /> Sart Joaquin County Public HMhh Ser'viO99, Enviromnental J44Wth Dhiska. (PHS/EHD) dated July S, <br /> 1999' 71V general woes Of vmrk will cmist of drilling and Sampling max:sail boring Hoath of Lyell mw- <br /> to invest*tc the vertical and lateral extent of rea:idaal soil caataunination, intalling, dcveiopinZ., aad <br /> sraxrplipg a tcrnporary gro undwww monitoring well in the boring tc investigate the rrcMem arxtLnf of the <br /> dhw vcd contaminant plums, properly, abandaft the 'tempa,ra,ry well ausd boring, and preparing r. <br /> teCtu"--&) "rt that surrtmprj,zM doe methods and results of the investotrion. <br /> Scope of Work <br /> Grot'r,ds+'L( ira the vicinity Of we]] MW5 «irisins tonal Petraleurn hydr marbons as gasoline('J P14G) at <br /> elevated lu'r el$. The lateral extent sail sad groundwater conwninatiorr W been essentially defin,xt to the <br /> east, south and v-vst,but not to the north. Thos current depth to gro;xIdws'ater at flys site is approxi"Utely 35 <br /> f zt below t1w VOund surface (bp), I'mproposed bori*temPMry Y%vIl will be drilled m a dept'; of <br /> aPproxitrWrly 43.50 feet beluw ground surfwe(bg,.g)in the Hammer Lane nght-.�f•�vay,aplsrvxirrra l}'SO <br /> feet north of-,vol? NfW3 to further investigatc the e+ttcm of suhWrrfac contimin.2.tictins. The location of the <br /> propoacd bong is shnwa on FWM Z, <br /> Spectrum Exploration (C57 0512268) will advaulce dw goring using a drilling rig equipped with hollow <br /> surra Augcrs. SOii santplCs will be collmled fbr joligitg and Jwi8radon at 5400 depth intervals. <br /> SamPlra will be collected using a 2-inch diameter CaliEbamis Split Spoaa sampEer linod wills brass tubes. <br /> The Portions Of tho ®ample to be am yred will be irurrraftcty napped Arad presrved in am iced aaolf,r ar a <br /> tevVerature of apProximatcly 4° Centigrade_ UP to three*oil swnpiee will be 3ubmined for a.aslvsit of <br /> TPHG, aryl bvuvw, toluene, dhy]benztrae, zylezm (MIX), Md Mth)1 tort butyl ether (MTBE) using <br /> EPA methods 80 13m and 8020,respectively,to injzstillAW the wdetit of resid,ral pFolire cantamination in <br /> 50ii, ScWawn of soil samples for larborattwy araaI%s will be basad on held evidsnee of gascbrw <br /> hydrocarbon impaction..such as d.iscolorafion,odors.and FID readings.as well as litht��gac rhst�s <br /> tic xe aw^Ry.!►�m`cept+rtsH.y t09S_dw <br />