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' Rainwater Car Wash • <br /> 420 West Yosemite Avenue, Manteca 2— 2 March 2001 <br /> Continue lateral and vertical investigation of groundwater contamination. The investigation <br /> ' must include installing clustered monitoring wells to identify vertical gradients and monitoring <br /> contaminant trends. <br /> ' Complete a 500-foot door-to-door well survey to identify any domestic or irrigation wells near <br /> the site. Sample all wells within 500 feet, along with any operational municipal wells within <br /> 21000 feet of the site. <br /> In addition to analyzing all groundwater samples for TPHg and BTEX using EPA Methods <br /> 8015/8021, analyze water samples for fuel oxygenates, ethylene dibromide, 1;2-DCA,methanol, <br /> and ethanol using EPA Method 8260B and report all peaks. <br /> ' If you have any questions or comments, please call me at (916) 255-3115. <br /> ' Marty Hartzell <br /> Associate Engineering Geologist <br /> ' cc: Mr.Phil Elder, Rainwater Car Wash, Manteca <br /> Mr. Mark Owens, SWRCB,UST Cleanup Fund, Sacramento <br /> ' Mr. Tim Cuellar, Advanced GeoEnvironmental, Stockton <br /> t <br /> 1 <br />