Laserfiche WebLink
d <br /> r <br /> UPS 0YO&OF I ®odwwe aNds 50612th Street Suite 200 <br /> Corporation Oakland 3 96007 4014 <br /> A Division of URS Cor <br /> P Fax 510 874 3268 <br /> July 14, 1999 <br /> Offices Worldwide <br /> 5109967049 00 <br /> San Joaquin County <br /> Public Health Services <br /> Environmental Health Division <br /> 304 East Weber Ave , Third Floor <br /> Stockton, CA 95202 <br /> Attention Ms Lon Duncan <br /> Subject Proposed Workplan for Soil and Groundwater Investigation <br /> 1645 Cherokee Lane, Stockton, California <br /> Dear Ms Duncan <br /> On behalf of the Central California Traction Company, URS Greiner Woodward Clyde <br /> (URSGWC) is pleased to present this Workplan to perform a soil and groundwater investigation <br /> at a former underground fuel tank site located at 1645 Cherokee Lane, Stockton, California <br /> In a letter dated May 20, 1999, Ms Lon Duncan of the San Joaquin County Environmental <br /> Health Division (SJCEHD) requested soil and groundwater exploration to explore the vertical <br /> and lateral extent of petroleum contamination at the location of the former underground fuel <br /> tanks In a phone conversation with Mr Richard Ely, of URSGWC, on July 1, 1999, Ms <br /> Duncan requested that groundwater be analyzed for total petroleum hydrocarbons (TPH) as <br /> diesel, TPH-gasoline, methyl-tert-butyl-ether (MTBE), benzene, toluene, ethyl benzene, and <br /> xylenes (BTEX) Soil samples will be analyzed for TPH-diesel and BTEX compounds <br /> BACKGROUND <br /> On January 26, 1999, a 6,000-gallon gasoline storage tank and a 1,000-gallon diesel fuel storage <br /> tank were removed from the site Soil samples were collected from below the ends of the tanks <br /> The samples from below the gasoline tank (Tank 1) at 13-ft bg were ND (not detected above <br /> laboratory reporting linut) for TPH-gasoline, BTEX compounds, MTBE and other oxygenates <br /> The sample from the soil pile from the gasoline tank excavation also was ND for these analytes <br /> Lead concentrations reported for these samples were not elevated, ranging from 19 to 40 mg/kg, <br /> which is considered within normal background range <br /> Soil samples were collected from 9-ft bg under the ends of the diesel tank (Tank 2) and analyzed <br /> for TPH-diesel and BTEX compounds The sample from the west end of the tank was ND for all <br /> • analytes The sample from the cast end of the tank had 5,000 mg/kg TPH-diesel, 330 gg/kg <br /> toluene, 740 gg/kg ethyl benzene, and 1,800 gg/kg total xylenes (benzene was ND) The sample <br /> I 10996704%1645Wordpl11n doc 07/14/99 <br />