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Quik Stop Station No 039 i October 27, 1999 <br /> Stockton California PSA Work Plan <br /> Task I Obtain permits from the SJCPHS-EHD for drilling three borings and <br /> . installing three groundwater monitoring wells (MW-1, MW-2 and MW-3) at <br /> the proposed locations shown on Figure 2, schedule a drilling subcontractor, <br /> prepare a site-specific health and safety plan, and notify Underground Service <br /> Alert(USA) <br /> Task 2 Drill three borings and install three groundwater monitoring wells (MW-1, <br /> MW-2 and MW-3) to estimated depths of 55 feet bsg at the site During <br /> advancement of the borings, soil samples will be collected and subjectively <br /> analyzed using an organic vapor meter (OVM) at 5-foot depth intervals and <br /> within horizons of obvious petroleum hydrocarbon impact If field evidence <br /> indicates that petroleum hydrocarbons are present below a depth of 55 feet <br /> bsg, then the boring will be continued until two consecutive 5-foot soil <br /> samples do not exhibit evidence of hydrocarbons <br /> . A 2-inch inside diameter (ID) groundwater monitoring well will be <br /> constructed in each of the borings and slotted within the first water-bearing <br /> zone (anticipated approximate screened interval from 35 to 55 feet bsg) <br /> Groundwater is estimated to range between approximately 40 to 50 feet bsg <br /> in the site area A typical monitoring well construction diagram is shown on <br /> Figure 3 <br /> Selected soil samples collected from each boring, will be submitted for <br /> laboratory analyses at a State-certified laboratory As required by SJCPHS- <br /> EHD guidelines, the selected soil samples will be analyzed by the laboratory <br /> for the presence of TPHg by modified Environmental Protection Agency <br /> (EPA) Method 8015, the volatile aromatic compounds BTEX, and the fuel <br /> oxygenate MTBE by modified EPA Method 8020 The results of the soil <br /> samples collected dunng the tank removal operations indicated that analyses <br /> for the other six oxygenated fuel additive compounds DIPS, ETBE, TAME, <br /> 7039-12 wp 4 HORIZON ENVIRONMENTAL,INC <br />