Laserfiche WebLink
1 <br /> V` 1117 Lone Palm Avenue, Suite BATC <br /> , <br /> Modesto, CA 95351' <br /> http://www.ateassociatias.com <br /> 209.579.2221 <br /> Fax 209.579.2225 <br /> ASSOCIATES16 I N C . <br /> ' November 15, 2005 <br /> 54.28349.0001 <br /> Ms. Lori Duncan <br /> San Joaquin County <br /> ' Environmental Health Department <br /> 304 E. Weber Street, Third FloorNV4R !!�i;,FR1.'l� S <br /> Stockton, California 95202 P <br /> Subject: Third Quarter 2005 Monitoring Report, Former Stockton City Taxi Cab Company, <br /> +� 2085 East Fremont Street, Stockton, California <br /> ' Dear Ms. Duncan: <br /> This report presents the results of quarterly groundwater monitoring and sampling performed during <br /> the third quarter of 2005, by ATC Associates Inc. (ATC) at the site located at 2085 East Fremont <br /> Street in Stockton, California (Figures I and 2). Sampling was performed to monitor the distribution <br /> of petroleum hydrocarbons in groundwater. Monitoring was performed to determine the groundwater <br /> flow direction and the hydraulic gradient in shallow and deeper groundwater. <br /> SITE HISTORY <br /> ' In 1998, two 10,000-gallon gasoline underground storage tanks (USTs) and associated product piping <br /> were removed from the site by Advanced GeoEnvironmental. Soil samples were collected from the <br /> tank pit and under product piping and analyzed for petroleum hydrocarbons. Analytical testing <br /> indicated the samples collected from the tank pit contained detectable concentrations of petroleum <br /> hydrocarbon constituents. <br /> tIn February 2000, WHF, Inc. (WHF) advanced two soil borings, Bl and B2, to depths of <br /> approximately 81.5 and 31.5 feet below ground surface (bgs), respectively. Soil and groundwater <br /> samples were collected from the borings and submitted for laboratory analyses. These soil and <br /> ' groundwater samples contained detectable concentrations of petroleum hydrocarbon constituents. <br /> In July 2003, WHF advanced six soil borings, four of which were completed as monitoring wells <br /> ' MW 1 through MW4. Soil samples collected from these borings contained detectable concentrations <br /> of petroleum hydrocarbon constituents. Petroleum hydrocarbons were detected in groundwater <br /> samples collected from MW 1 through MW4. <br /> From <br /> November 10 to November 12, 2004 and November 15 to November 17, 2004, an ATC <br /> geologist supervised the installation of monitoring wells MW5 through MW12. Soil samples were <br /> collected from the boreholes of MW5, MW6, MW7, MW8, MW9, MW10, MW11, and MW12 and <br /> selected soil samples were submitted for laboratory analyses. Each well was constructed with 2-inch <br /> diameter PVC casing, with MW8, MW9, MW10, and MWI1 extending to a depth of 65 feet bgs in <br /> f <br /> s:lenvirornenial\283491reports12005 3QMR.doc 1 ATC Associates Inc. <br /> ENVIRONMENTAL, GEOTECHNICAL AND MATERIALS PROFESSIONALS <br />