Laserfiche WebLink
TIIIRD QUARTER 1994 QUARTERLY REPORT ON <br /> SOIL REMEDIATION AND GROUNDWATER MONITORING <br /> APACHE PLASTICS L.P. SITE <br /> 2050 EAST FREMONT STREET, STOCKTON, CALIFORNIA <br /> 1 <br /> 1.0 INTRODUCTION <br /> This report has been prepared by Upgradient Environmental Consultants (Upgradient) for Apache <br /> ' Plastics L P, (Apache)regarding its facility at 2050 East Fremont Street, Stockton, California, (the <br /> site) It documents Apache's programs to remediate petroleum hydrocarbon contamination in the <br /> soil and to monitor groundwater quality beneath the site The following sections discuss the <br /> 1 project background, vapor extraction system start-up, operation and monitoring 7 for the third <br /> quarter, July-September of 1994 The groundwater monitoring wells at the site were monitored <br /> ' during the third quarter of 1994 All the wells were dry, therefore groundwater quality is not <br /> discussed <br /> 2.0 BACKGROUND <br /> 2.1 Location and Setting <br /> The Apache Plastics facility, which manufactures extruded plastic pipe, occupies an essentially flat <br /> site in a mixed commercial/industnal district on the east side of Stockton, California(Figure 1) <br /> Vadose zone soils beneath the site consist primarily of interbedded sand, sandy silt, silty sand and <br /> ' silt between approximately 15 and 35 feet and between approximately 40 and 65 feet below <br /> ground surface Clayey soil exists above 15 feet, between 35 and 40 feet and below 65 feet <br /> Groundwater is present at a depth of approximately 70 feet below ground surface <br /> 2.2 Soil and Groundwater Contamination <br /> Gasoline was detected in the soil following removal of a 1000 gallon tank in August 1988 J <br /> Subsequent investigative work by Western Geologic Resources (reports dated November 1989 and <br /> August 1990) and Remediation Services Inc (report dated February, 1992) indicated that soil <br /> beneath the site locally contains total petroleum hydrocarbon (TPH) concentrations as high as <br /> 13,000 mg/kg Concentrations of over 1,000 mg/kg reach a depth of 65 feet and extend laterally ` <br /> more than 25 feet from the source <br /> 2.3 Soil Remediation To remediate the soil contamination beneath the site, Apache elected to use in-situ vapor <br /> extraction, wh,ch was concluded to be feasible based on a vapor extraction test,performed by RSI <br /> and discussed in a report dated February 14, 1992 Wells installed by RSI for the vapor extraction <br /> test and an internal combustion engine supplied by VR Systems of Anaheim, California were <br /> 1 <br />