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' Quarterly Monitoring Report,July 1999 Canepa s Car Wash(Part.Street) August 31 1999 PagL 2 3 1 Groundwater Monitoring Observations and Parameters The static water level in each well was measured to the nearest 0 0i-foot with a battery-operated, flat tape, water-level meter A clean, single-use, polypropylene, disposable bailer was lowered into each well to check for floating product, petroleum odors, and sheen floating product was not observed in any of the monitor wells during the groundwater sampling It should be noted that the groundwater table was above the top of the ' well screens Moderate petroleum hydrocarbon odors were detected in the groundwater samples collected from MW-2 and MW-5 Petroleum hydrocarbon odors were not noted in the remaining groundwater samples All of the monitor wells were purged using new, disposable bailers Approximately three well casing volumes of water were purged from each well (see the Groundwater Monitoring Field Forms in Appendix B) The purged water from each well was placed in 55-gallon drums and left on site pending laboratory analytical results I 3 2 Groundwater Sampling The groundwater samples were collected directly from disposable bailers by transferring the groundwater to two 40-milliliter glass vials The sample containers were labeled, placed in a cooler chilled with ice, and delivered in accordance with chain-of-custody procedures to GeoAnalytical Laboratories, Inc , in Modesto, ' California, on the day of collection 4. GROUNDWATER MONITORING RESULTS 4.1 Groundwater Elevation Contours ' On July 27, 1999, the depth to groundwater was measured in each monitor well prior to the collection of groundwater samples Tine average depth to groundwater on July 27, 1999 was approximately 23 feet below the well measuring points (slightly below the ground surface) The average depth to groundwater increased approximately 0 2 feet since the previous monitoring event conducted in April 1999 The groundwater elevation ranged from 1 1 06 to 12 77 feet below mean sea level (bmsl) The groundwater elevation contour map (Figure 3, Appendix A) indicates a groundwater gradient generally toward the northeast See Table 1, on ' the following page, for groundwater elevation data A hydrograph of groundwater elevations is included as Figure 4, Appendix A 1 19 r ' ;� CONDOR