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• The results of the groundwater samples indicated no levels of Fuel Oxygenates and <br /> Additives above the analytical detection limits <br /> TPHIg, BTEX results of the groundwater samples were as follows <br /> D1 lo -3 / b-3 <br /> Results in Parts Per Billion (PPB) <br /> Sample# TPHIg Benzene Toluene EthylBenzene Xylenes <br /> MW-3 ND<50 ND<1 ND<1 ND<1 ND<3 <br /> MW-4 1570 ND<1 3 17 11 <br /> Detection <br /> Limit 50ppb 1ppb 1ppb 1ppb 3ppb <br /> DETERMINATION OF HORIZONTAL GROUNDWATER GRADIENT <br /> On September 8, 2003, the water levels in monitoring wells MW1 through MW5 were <br /> measured within a fifteen minute period The water surface elevations in the wells,with the <br /> elimination of well MW1 due to inconsistent data, were calculated using the previous well <br /> head elevation survey Then, the horizontal hydraulic gradient was calculated based on <br /> well locations depicted in the ACT Environmental site plan (Drawing number 94-326-A36) <br /> found in the August 2002 Monitoring Report The gradient calculated showed a 0 25% <br /> magnitude in a southwest flow direction <br /> VE <br /> Respectfully submitted this 29th day of Septemb so •• <br /> PON <br /> 'I ---^ • DAR <br /> • <br /> Bennett T Halsted Samuel H Hals ••,•�+lV11.o••''•� <br /> Project Manager C E 14095 q . •••• p�aQ' <br /> OF OpL1F <br /> r� <br />