Laserfiche WebLink
APR-21-97 MON 08:05 AN EHD/HMD FAX NO. 9163867011 P, 0] <br /> Past-tr Fax Notre 7671 D� <br /> ''4ng* ,�,. <br /> IRR C,mept <br /> cm <br /> Phase Y.2 / r Pho-i <br /> APR 2 7a� y -�sr�r/ 9�c 3 [-doe,, <br /> 19 7 Fax a -2d9 kvud - GV H$ Fax fry .78G-to roe <br /> PE <br /> 19 AA ` <br /> U%&SERVIs^FS <br /> Ms. Linda Tu a <br /> San Joa ,tn County Public Health Serviceq <br /> Environmental Health Department <br /> P 4 Box 338 <br /> Stockton, CA 95201-0388 <br /> Re: Work Phan Addendum <br /> 821 North Cherokee Lane, Lodi, Cama <br /> Site Code; 1324 <br /> Dear Ms Turkatte <br /> Pursuant to our February 1997 conversatiorb t have prepaFed a second addendum to the <br /> 13 March 1994 work plan This addendum updates the 1 August 1995 adder] urn to <br /> include tasks which will allow an evaluaflotof the, "nek" posed by OVe gasoline;rid used <br /> at this site Upon your acceptance of MM mdftdum, a cost analysts will be perfomt9d; <br /> and along with the scope of work, it will be submitted�SB2604 Fund personnel for"pre- <br /> approval`. <br /> Rg*d on the suggested policy of the Stag dater�Resouvses Cgntrol$oars (Stl ACB) <br /> and the data collected thus far,lrecommend m&ptor v mft be installed at the a j*eont <br /> penmeter (based on the HydroPunch' data) of 142 pF-Jtne VNlth iota exception offMW 1, <br /> groundwater at each of the monitor wellsl?j, be monilor64d to agow an assessrlrienteof <br /> plume stability and biological activity <br /> In order to evaluate "receptors", a survey of supply wello needs to be pet~fbgafiRl_ <br /> Adtlttionally, a health risk assessment needs to be perforrized Because of a lack of sof <br /> data and model sensitivity, I propose to colle4, air samples to evaluate potential <br /> volatiltation exposures. <br /> As stated in the i Aug�_Ot 1995 addenftra, I recommend ft&oying MW-1 tis it i$-no <br /> longer serviceable and Is apparently well vgMin ttt;�:grpundwater contaminant plume As <br /> it may be possible to g�e MVLA with a vepK extMcdon sys�eM the %festrWi�n sho O <br /> not be performed unbi after a vapor extr&rtMn4est di,the�aite <br /> In addition, because the pump island area had Vat to belfrivestigated and significant <br /> residual soitj ,*amination has not yet been reported% fids site, 1 recommend.aoiiecting <br /> soil data from beneath each of the purnZ istands ib evaluate potential r6i! dual <br /> hydrocarbon sources. <br /> Basgid,gn the results of the CPT Survey, it appears that vapor extraction maybe a viable <br /> 10 <br />