Laserfiche WebLink
I <br /> r44 <br /> samples will be packaged in a refrigerated cooler for <br /> .. shipment to the WESTON Analytics laboratory in Stockton, <br /> California for analysis. The lab is certified by the St5te <br /> j , of California and other agencies f73r hazardous materials <br /> analysis. All sample shipments and handling will be doc4.- <br /> �„ mented by a chain-of-custody ' . .rm. <br /> I <br /> If the analysis shows the sample to contain less than 100 <br /> mg/kg of TPH, no further excavation will be performed. if <br /> concentrations over 100 mg/kg TPF? ::ire found, the stepped <br /> i.; excavation phase will commence. <br /> �.. G. Additional Stepped Excavation <br /> If additional excavation beyond the limits shown on ^figures <br /> 3 through 5 is required due to the results of the initial <br /> confirmation sairpling, the excavation work will be scheduled <br /> i + as soon as proper transport trucks can be scheduled into the <br /> site. The excavated soil will be loaded, shipped and <br /> °• disposed in the same manner as described above. The same <br /> equipment and site cleanup procedures will be used. <br /> After the additional soil is excavated, another round of <br /> confirmation samples will be taken in a. manner similar to <br /> the initial sampling described in Section F above. Sample <br /> locations will be selected depending on the configuration <br /> and size of the newly excavated area. <br /> 3.2 Gratindwater Monitoring Well PumR 'fest <br /> } As stated previously, dua to the lack of free product within the <br /> groundwater and the prohibitive cost oaf groundwater cleanup, <br /> WESTON proposes to conduct a limited pump test to determine the <br /> usability of the affected aquifer. <br /> a� <br /> The aquifer test will be conducted on well MW-1, one of the <br /> x previously installed monitor wells situated well away from the <br /> actual excavation. To evaluate the transmissivity and hydraulic <br /> conductivity of the aquifer, an inflow test will be conducted. <br /> An inflow test consists of the introduction of potable water into <br /> the well at a measured rate. The measured inflow rate is adjust- <br /> ed to maintain a constant "Target" water level (head) of 3 fee•r <br /> above the pre-test static water level. <br /> The information derived from the aquifer test will help estimate <br /> the hydraulic conductivity and transmissivity of the aquifer <br /> 1 ; which in turn will reflect the potential maximum sustainable well <br /> i yield. <br /> 4.0 HEALTH AND SAFETY PLAN <br /> it Health and safety aspects for both the excavation personnel and <br /> the plant workers will be covered by the preparation of a formal <br /> j <br /> - 6 - <br /> E <br />