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" ARM A <br /> Working to Restore Nature <br /> 3164 Gold Camp Drive, Suite 200 <br /> Rancho Cordova, CA 95670 <br /> Phone (916)852-6690 <br /> Fax (916) 852-6688 <br /> December 6, 1993 <br /> Mr George Takemori <br /> A Teichert & Son, Inc <br /> 1 Equipment Administrator <br /> P O Box 15002 <br /> Sacramento, California 95851 <br /> Subject Status Report, Fourth Quarter 1993 <br /> A Teichert & Son, Inc Tracy Aggregate Plant <br /> 29099 South McArthur Lane, Tracy, California <br /> „ Mr Takemori <br /> At the request of A Teichert & Son, Inc (Teichert), RESNA Industries Inc (RESNA) is <br /> conducting an environmental investigation at the subject site (shown on Plate 1) We have <br /> prepared this status report on the work conducted during the fourth quarter 1993 Work <br /> included groundwater monitoring <br /> BACKGROUND <br /> According to information supplied by Teichert (LBME Corporation, October 1, 1988), <br /> Teichert removed two 1,000-gallon underground gasoline tanks in March 1987 The <br /> approximate locations of the present site features are shown on the Generalized Site Plan <br /> (Plate 2) Laboratory analyses of soil samples collected from the base of the tank cavity <br /> / indicated that residual hydrocarbons were present <br /> i <br /> In July 1987, LBME Corporation of Sacramento, California, drilled three soil borings and <br /> t installed one monitoring well in one of the borings (MW-1/BH-1) Results of analyses of <br /> soil samples collected between 20 and 35 feet below grade indicated that gasoline <br /> hydrocarbon concentrations(quantified as total petroleum hydrocarbons as gasoline[TPHg}) <br /> 5 ranged from below laboratory detection limits to 34 parts per million Hydrocarbons have <br /> not been identified in groundwater samples collected from the monitoring well with the <br /> r <br /> exception of the initial sampling event immediately following well completion The <br /> S <br /> 'i j io28g[ek/123009-1 <br /> 5 <br />