Laserfiche WebLink
�CVVATC <br /> ASSOCIATES I NC <br /> Remedial Investigation/Feasibility Study <br /> ' Diesel Performance <br /> 2804 East Fremont Street <br /> Stockton, California <br /> ATC Project No 54 62577 0001 <br /> 1.0 INTRODUCTION <br /> I ATC Associates Inc has prepared this Remedial Investigation/Feasibility Study on behalf of <br /> Diesel Performance to summarize findings of the soil vapor extraction pilot tests at the above <br /> referenced site The purpose of the pilot tests was to evaluate if soil vapor extraction is a viable <br /> ' remedial option for remediating petroleum impacted soil and groundwater in the vicinity of the <br /> former underground storage tanks (USTs) This work was done at the direction of San Joaquin <br /> County Environmental Health Department (EHD) The findings of the pilot study are <br /> ' summarized in the following paragraphs <br /> 1.1 Site Location <br /> The site is located on the south side of East Fremont Street in the City of Stockton, California, as <br /> shown on Figure 1 The location is a commercial/industrial and residential area The site is <br /> currently occupied by Diesel Performance <br /> 1_2 Site Background <br /> In February 1987, SEMCO removed and disposed of one 3,000-gallon unleaded gasoline <br /> underground storage tank (UST), associated piping, and fuel dispenser from the location shown <br /> on Figure 2 A soil sample collected at 13 feet below ground surface (bgs) contained elevated <br /> concentrations of petroleum hydrocarbon contaminants The excavation was subsequently <br /> backfilled and resurfaced <br /> On July 23, 1997, an ATC geologist supervised the advancement of five soil borings ranging in <br /> depth from 6 to 46 feet bgs The soil borings were advanced using a truck mounted Geoprobe® <br /> narrow diameter rig employing direct push technology Soil samples were submitted for analysis <br /> and contained detectable concentrations of petroleum hydrocarbons Site activities were <br /> summarized in ATC's Summary Report for Subsurface Investigation, dated October 20, 1997 - <br /> On September 25, 1998, ATC personnel supervised the advancement of soil boring MW1 at the <br /> site to a depth of approximately 65 feet bgs to evaluate groundwater for the presence of <br /> petroleum hydrocarbons The soil boring was completed as a groundwater monitoring well and <br /> on September 28, 1998 the well was developed and sampled Analytical data indicated that soil <br /> and groundwater samples contained detectable concentrations of petroleum hydrocarbons Field <br /> w 1625771reportslnfs doc 1 <br />