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1 <br /> Geofogicaf Technics Inc. <br /> 2741 Vver Road <br /> Modesto,Catfornra 95351 <br /> (209)538-6424/�ax#538-5852 <br /> REPORT <br /> =-` Ground water Monitoring <br /> Fall Quarter 1996 <br /> C & B Equipment <br /> 7474 West 11th Street <br /> Tracy, California <br /> Project No. 336.2 <br /> January 13, 1997 <br /> EXECUTIVE SUMMARY <br /> This report summarizes the Fall Quarter 1996 round of ground water monitoring and testing <br /> that took place on December 6, 1996. The test results show that detectable concentrations of <br /> the aromatic hydrocarbon compounds (BTEX) and gasoline range petroleum hydrocarbons <br /> r (TPH-G) are present in two monitoring wells (MW-1 & 2). MTBE was detected in MW-1. <br /> _.� One domestic water well in the immediate area of the tank was tested and the sample was <br /> =' non-detect for gasoline at that time. <br /> -a The ground water level has fluctuated about 0.96 feet since July 1995. Site specific gradient <br /> iy <br /> and bearing measurements and calculations show that ground water flows in a north- <br /> northwesterly direction at approximately 0.00375 ft/ft. <br /> 1.0 GROUND WATER MONITORING <br /> 1.1 Hydrology of Site <br /> Limited sampling has occurred at this site, July and September of 1995 and December 1996. <br /> During these events ground water levels have remained fairly constant. <br /> On December 6, 1996 depths to water were measured in MW-1, MW-2 and MW-3. The <br /> ;! ground water elevation, gradient and direction were calculated. The average elevation was <br /> }_I <br />