Laserfiche WebLink
1 <br /> CTe0togicat reCh4 Ics Iftco <br /> ' 1101 7h Street <br /> Modesto,California 95354 <br /> ' (209)522-4119/Fax(209)522-4227 <br /> ' REPORT <br /> ' Dual Phase Pilot Test <br /> Soil Vapor & Groundwater Extraction <br /> 1 <br /> Cardoza (Super Stop) <br /> ' 290 N Main Street <br /> Manteca, CA <br /> ' Project No 662 2 <br /> February 22, 2005 <br /> 1.0 INTRODUCTION <br /> In March of 1998 a total of six angle boreholes were hand augered beneath the three existing <br /> 8,000 gallon USTs at the site Minor amounts of MTBE, Toluene, and Xylene were detected <br /> in soil samples <br /> On April 29, 1998 Cardoza Enterprises was directed by San Joaquin County Environmental <br /> ' Health Department (SJC/EHD) to submit a work plan to determine if residual soil or <br /> groundwater contamination exists beneath the tanks (see Figures 1 & 2) Two direct push <br /> ' soil borings were installed in August of 1998 Laboratory results showed the presence of fuel <br /> oxygenate compounds in the soil, and BTEX, TPH-G and fuel oxygenate compounds in <br /> groundwater <br /> In March of 1999, the three underground fuel storage tanks, their associated product and vent <br /> lines were removed At that time soil samples were collected and tested according to the <br /> ' regulator's discretion A new storage tank and dispenser system was installed and the station <br /> returned to operation <br /> ' On January 5, 2000, three soil borings were dulled at the site and converted into groundwater <br /> monitoring wells Groundwater samples collected from MW-1 and MW-3 have contained <br /> elevated concentrations of the gasoline oxygenate MTBE Well MW-2 has not contained <br /> contaminant concentrations above the laboratory reporting limits since it's' installation <br />