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SENT BY:HOLZ RUBBER CO 6-26-97 ; 10:31 HOLZ RUBBER CO.� ;# 4/ 6 <br /> .&ARR ASSOCIATES <br /> Randall A.Bays,Esq. <br /> August 21, 1997 <br /> Page 2 <br /> mei that a groundwater monitoring well be installed in the immediate downgradLnt vicinity of <br /> the empty drum &hazardous material storage area to fta'ther evaluate groundwater 4,Wt), <br /> 3. The Workplan specifies that£our soil vapor paints are to be located along South <br /> Sacramento Stmt Aaccut to the subsurface sewer system. <br /> Farr Associates recommends that soil vapor points along South Sacramento Street be located <br /> adjacent to every Holz sewer lateral connection to the municipal sewer and storm water system <br /> 4. The Workplec dens not specify actual decontmmination procedures for field equipment <br /> Farr Associates recommends that in order to reduce the potertial for cross-.cWaminatfon, the <br /> downhole sampling equipment should be pressure-washed with a steam clemeer/hot pressure <br /> washer prior to beginning drilling and between borings. EquVmeid?gMeate grnerated during <br /> the investigation should be contained in SS-gallan US Departmetd of Transportation(DOV, <br /> apWosed drums, then labeled and stored on-site pending receipt oflaboratory attalyncul r=lt t <br /> for evaluation ofdUposaal alternattves. <br /> 5. The Workplan proposed sail gas sampling procedures as Encloause C. <br /> Farr Asaociates b concerned that the soil gas sampling methodology proposed maty not result in <br /> dam of sufficient quality to allow for the assessment elfthe pcietial threat to human health mid <br /> the en vb'M menf If Holz Rubber elects to use the soil gas sampling methodology proposed Farr <br /> Asaocictes requests that detadcditeld notes be taken and provided with the summary►sport for <br /> the City ofLodi's review. <br /> Add*xal Commenis: <br /> p'arr.issaeteues recommends that a"donal soil vapor and soft samples be collected from the <br /> fotlowbtg areas: <br /> • VNA&ffn No. 7, where PCE use has been previously identfflkd <br /> • In the vicinity of the spawoy booth where AfMAli; MM TCE and toluene have been <br /> historically used; <br /> • In the victtdty of the cltenttcal alp tanks aid holdln`Mks aced product smrage arm: <br /> • In the vtctrtty of the evWQ drKm&,haaardotts nr a& dots swfW arnr. <br /> ALG-25-1997 88 0 9163519357 P.03 <br />