Laserfiche WebLink
w <br /> ' 4 <br /> GeologicafTechnics Inc. <br /> 2741 Rwer Road <br /> 51{o AsU,CaCfomia 95351 <br /> (209)538-64241FwC#538 5852 <br /> 4 <br /> REPORT <br /> RemedialAction <br /> Former Moresco Property <br />'4 16865 Gawne Road <br /> Stockton, California <br /> Project 251.3 <br /> February 6, 1998 <br /> EXECUTIVE SUMMARY <br /> To reiterate, our goal is to mitigate the area of this site with <br /> high levels of gasoline in the soil. <br /> g <br /> Prior to remediation, this situation presented a human health risk due to being a potential source <br /> ofroundwater contamination oration and volatilization from shallow contaminated soils at a residence. <br /> One vapor extraction well and three passive air recharge wells were installed in September of <br /> w 1997. A vapor extraction treatment system (VETS), which uses a Thermal Oxidizer (TO), was <br /> installed in November 1997 at the former Moresco Property on Gawne Rd. The initial inspection <br /> was performed on November 12, 1997 by the San Joaquin Valley Unified Air Pollution Control <br /> District (SJVUAPCD). } <br /> The VETS has ran nearly continuously from the initial inspection to January 14, 1998. It has <br /> been down on three short occasions because the TO dropped below minimum operating <br /> temperatures. To date the VETS has removed and treated approximately 85 gallons of gasoline <br /> from the soil. <br /> 1.0 PURPOSE <br /> This report is being submitted to document ,.the removal and destruction of petroleum <br /> hydrocarbons sourced from a former leaking underground storage tank at the former Moresco <br /> Property, Stockton, California (Figure 1). This monitoring report ;covers from the system_ <br /> installation in September, 1997 to January 14,1998 when the system was shutdown. <br /> 2.0 VAPOR EXTRACTION SYSTEM <br /> CA vapor extraction treatment system (VETS) serviced by a thermal oxidizer(TO) was proposed <br /> for the site by Geological Technics Inc. (GTI) in the Interim Remedial Action Plan, April 8, <br /> 1997. The goal of the project was to remove the core of the highly concentrated gasoline soil <br /> plume. On April 11, 1997 Mr. Ron Rowe of SJC PHS/EHD approved the work plan with <br /> comments. Borehole permits were secured and the work described below was initiated. <br />