Laserfiche WebLink
1 <br /> CHRONOLOGY <br /> 474 W GRANT LINE, TRACY <br /> 8/25/86 Three UST's removed without PHS/EHD inspection on 8/24/96 <br /> (3000 gallon regular, 2000 gallon unleaded, and 2000 gallon <br /> premium). Water was in the excavation so a water sample was <br /> collected. A fourth tank was discovered and removed this date <br /> (350 gallon waste oil). Numerous holes were noted in the tank and <br /> there was oil on top of the water that was in the excavation. A grab ' <br /> water sample was collected. <br /> 12/31/86 PHS/EHD received the sample results from the grab water samples <br /> collected on 8/25/86 from,the tank pits. Both water samples <br /> evidenced contamination. <br /> 5/9/94 The site was placed in LOP. <br /> 1/5/96 Six soil borings were drilled and 3 were converted to monitoring <br /> wells. Nine of the soil samples collected from the borings were <br /> analyzed. The soil sample from SB3 at 6 feet below grade i <br /> evidenced soil contamination but the soil sample collected from this <br /> boring at 11.5 feet below grade did not evidence any contaminants. <br /> SB3 was just north of the fuel tank location. SB1 and SB2 were 4 <br /> drilled in the tank pit and the soil samples did not evidence any I <br /> contamination. <br /> 1/8/96 The 3 monitoring wells were sampled and the results were non <br /> detect. MW3 is with 10 feet and down.gradient of the former waste <br /> oil tank location. MW2 is within 15 feet and down gradient of the <br /> former fuel tank locations: <br /> 3/25/97 The 3 monitoring wells were sampled a second time and the results <br /> were non detect. <br /> 6/19/97 PHS/EHD determined the site is low risk and should be closed. <br /> P <br />