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1 <br /> Geological Technics Inc. <br /> 2,141 RrmrRoad <br /> Modesto,Catfmnra 95351 <br /> (209)538-6424/jax#538-5852 <br /> REPORT <br /> 1 <br /> Groundwater Monitoring <br />' Fall Quarter 1999 <br /> Morita Brothers <br />' 814 E. Charter Way <br /> Stockton, CA <br />' Project No 724 2 <br /> December 21, 1999 <br /> 1 <br />' • EXECUTIVE SUMMARY <br /> This report summarizes the Fall Quarter 1999 round of groundwater monitoring and testing <br />' that took place on November 16, 1999 The test results show that detectable concentrations <br /> of the aromatic hydrocarbon compounds (BTEX) and gasoline range petroleum hydrocarbons <br /> (TPH-G) are present in the five ;monitoring wells associated with the site Concentrations in <br />' MW-1, MW-2 and MW-3 remained consistent with those observed during the last <br /> monitoring event Concentrations in MW-4 are roughly the same as those found in MW-2 <br /> The groundwater sample collected from MW-5 showed low concentrations of benzene, ethyl <br />' benzene and xylene <br /> This is the third event that included testing for the oxygenated fuel compounds by EPA <br />' Method 8260 All wells were non-detect for these compounds <br /> The groundwater level dropped approximately 0 83 feet since the January monitoring event <br />' Groundwater gradient calculations show that groundwater flow is S850E at 0 0019 ft/ft <br /> • <br /> I <br />