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KEI-P92-0205 .QR1 . April 2 , 1993 Page 2 MW3 , MW4, and MW5, which were not monitored during the December 30, 1992 , monitoring event, and well MW7, which was not monitored during the January 11 and 12, 1993 , monitoring event. During monitoring, the wells were checked for depth to water and the presence of free product. Prior to sampling, the wells were also checked for the presence of a sheen. No free product or sheen was noted an any of the wells during the quarter. The monitoring data collected this quarter are summarized in Table 1. Water samples were collected from all of the wells on February 27, 1993 . Prior to sampling, the wells were each purged of between 5.5 and 9 . 5 gallons of water by the use of a surface pump. The samples were collected by the use of a clean Teflon bailer. The samples were decanted into clean VOA vials and/or one-liter amber bottles, as appropriate, which were then sealed with Teflon-lined screw caps and stored in a cooler, on ice, until delivery to a state-certified laboratory. HYDROLOGY • The measured depth to ground water at the site on February 27, 1993 , ranged between 5 . 37 and 6.88 feet below grade. Based on the water level data gathered during the quarter, the ground water flow direction appeared to be predominantly to the west (varying from the west-northwest to the west-southwest) , with a northerly flow direction in the northern portion of the site during the February monitoring event, as shown on the attached Potentiometric Surface Maps, Figures 1, 2 , and 3 . The average hydraulic gradient across the majority of the site on February 27 , 1993 , was approximately 0. 008 . ANALYTICAL RESULTS The ground water samples were analyzed at Sequoia Analytical Laboratory and were accompanied by properly executed Chain of Custody documentation. The samples were analyzed for total petroleum hydrocarbons (TPH) as gasoline by EPA method 5030/modi- fied 8015, benzene, toluene, xylenes, and ethylbenzene by EPA method 8020, and TPH as diesel by EPA method 3510/modified 8015 . The ground water sample analytical results are summarized in Table 2 . The concentrations of TPH as gasoline, benzene, and TPH as diesel detected in the ground water samples collected this quarter are shown on the attached Figure 4 . Copies of the laboratory analytical results and the Chain of Custody documentation are attached to this report.