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INTERIM REMEDIAL ACTION PLAN <br /> 4491 West Durham Ferry Road <br /> Tracy, Calrfortua <br /> Delta Protect No 40-91-732 <br /> Page 2 <br />' A Developed newly constructed monitoring wells MW-2 and MW-3 as well as the pre-existing <br /> well (MW-1), contained all discharge water in 55-gallon drums and stored them on site <br /> A Purged three well casing volumes of water from each monitoring well (MW-1, MW-2, and <br /> MW-3) and measured pH, temperature, and conductivity Purged water was contained in <br />' 55-gallon drums <br /> A Collected and submitted four ground water samples to a state-certified laboratory for <br /> chemical analysis using EPA Method 8260 for TPH as gasoline and BTEX with a <br /> ' 10-working-day turnaround time One ground water sample was collected from each of the <br /> existing monitoring wells and one water sample was collected from the domestic well faucet <br /> A Surveyed the relative lateral and vertical locations of the ground water monitoring wells <br /> A Prepared and submitted Phase I Hydrogeologic Investigation Report - dated <br /> ' November 14, 1991 <br /> ' e Sampled ground water monitoring wells on April 9, and July 10, 1992, and submitted <br /> reports on May 20, and August 13, 1992 <br /> 2.0 BACKGROUND INFORMATION <br /> ' 2.1 Site Description <br /> The site is located approximately 7 5 miles southeast of the city of Tracy, California, at the northeast <br /> ' corner of the intersection of Durham Ferry Road and Bird Road at 4491 West Durham Ferry Road, <br /> Tracy, California [SW 1/4, SW 114, Section 18, T 3S , R 6 E (Figure 1) ] <br /> 1 <br /> The site elevation is approximately 100 feet above mean sea level (MSL) as depicted on the U S <br /> Geological Survey, Vernalis, California, Quadrangle (1969 photorevised 1980) The regional slope of <br /> the land is toward the northeast <br /> RPTo45 TA <br />