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TREADWELL & ROLLO <br /> 6.0 CONCLUSIONS <br /> No diesel or BTEX were detected in the soil using field screening tests or laboratory <br />' testing. Only a very low level of petroleum hydrocarbons as diesel were detected in the <br /> groundwater. These analytical results corroborate the findings of our earlier site <br /> investigation conducted in late April of this year The concentrations of diesel detected <br /> in the downgradient groundwater diminished over the intervening five months. These <br />' results appear to indicate that the diesel can be expected to attenuate with time due to <br /> naturally existing factors Since the diesel was only detected in very low levels and no <br /> chemicals regulated by the State of California to preserve drinking water quality were <br /> detected, we do not believe any additional remedial work is required. We recommend <br /> the well be monitored for one more quarter. If the additional monitoring results confirm <br /> our present findings, a formal petition for site closure should be made to the Local <br /> Enforcement Agency. <br /> 7 <br /> 11070707 PJC 1$ November 1993 <br /> 1 <br />