Laserfiche WebLink
A letter from the San Joaquin County Public Health Senices - Emironnrental Health <br /> Division (PHS/EHD) dated March 7, 1994, stated that "the former underground storage <br /> tank(s) cannot be recommended for final closure without further investigation to determine <br /> the full extent of the soil and/or groundwater problem " In response to the letter from the <br /> PHS/EHD, GeoAudit was retained to assess soil and groundN%ater conditions at the site <br /> ' 2.3 Monitoring Well Installation and Sampling <br /> On April 27 and 28, 1994, eight soil borings mere drilled at the site Three of the borings <br /> were completed as 2-inch groundwater monitoring wells Soil samples%%ere collected at five- <br /> foot intervals during drilling Pan-Ag Environmental Labs analyzed fourteen soil samples for <br /> total petroleum hydrocarbons (TPH) as gasoline, TPH as diesel and volatile aromatics <br /> (BTESX) TPH as gasoline was detected in ten samples at concentrations as great as 3,800 <br /> ppm (134-20). TPH as diesel was detected in helve samples at concentrations as great as <br /> ' 9,000 ppm (138-20), Concentiations of benzene, toluene, ethvlbenzene and xylenes \sere <br /> detected in eight of the soil samples The analytical results of the soil samples are <br /> summarized in Table 1 <br /> tAfter installation, g round«ater samples were collected from each Nell The samples were <br /> analvzed for TPH as gasoline, TPH as diesel and BTE&,X TPH as gasoline \Nas detected <br /> ' in MSV-1, NIW-2 and MW-3 at concentrations of 1,700 Pg/L (ppb), 14 000 ppb and 2,600 <br /> ppb, respectively TPH as diesel vas detected in NMI, Al\V-? <br />