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JI <br /> foot/foot. <br /> • Consideration should be given to the possibility that the ground water in the <br /> k t immediate vicinity of MW-6 may be impacted by gasoline fractions released in the <br /> surface waters of Fourteen-Mile Slough. Careless motor boat fueling and boat <br /> engines in need of repair may be significant contamination sources. The <br /> downgradient movement of water away from the slough may be the mechanism for <br /> transport. <br /> 7.0 RECOMMENDATION <br /> • Existing monitoring wells should be sounded and sampled quarterly. The ground- <br /> water gradient and flow direction would also be calculated quarterly in order to <br /> identify changes in contaminant migratory paths. <br /> 8.0 CERTIFICATION <br /> Should you have any questions regarding the information contained in this report, or if we <br /> may be of further service, please contact our Merced office at (209) 725-2085. W. W. Irwin, <br /> Inc. is not responsible for undisclosed or hidden, site-specific information or conditions. <br /> [ Respectfully submitted, <br /> W. W- Irwin, Iraq N�IRONAgE� <br /> 1 Q�p PyNg ir.Fqq� �pk- �, Alyp J,9� <br /> c Na.02980 C CO <br /> Expires No. 04442)Ut0.A__ a <br /> k4444A4 * * Exp.6-io.`r 35 <br /> 1 Dayne L. frary, Senior Geologis �9TF� 1�����P clt� \ <br /> Registered Geologist No. 4456 F CAL T£OF CAI-1FaQ`� <br /> Registered Environmental Assessor No. 02980 <br /> p GEoC <br /> -- W DA,YNF L. FRARY <br /> i . cc __4 <br /> Daniel L. Anderson <br /> Merced Branch Manager * No. 4456 <br /> I' Registered Environmental Assessor No. 04442 <br /> - I,9lcc-011" C C <br /> f CA1- <br /> W.W.Irwin,Inc. <br /> Project No.33016.03 <br /> July 1994 8 <br /> j--i <br />