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i Mr John Johnson Protect 113-06-03, September 16, 1994 Page 2 the well Well measurements taken at the same time showed the groundwater flow direction to be toward the north A passive skimmer was installed in MW-4 by Parker Environmental Services on Februaty 11, 1993, to collect floating product Tl-ie skimmer allows gasoline to enter through a selective membrane that keeps water out Ms Linda Turkette, a Health Specialist from San Joaquin County, was present during the installation No free product was collected in the skimmer during the monitoring period, and no visible sheen or free product was apparent in MW-4 during this time Groundwater sampling was performed by Parker Environmental in Februal y, May, August, and November, 1993 Drums with purge and wash water from the first 2 quarters were removed on August 3, 1993 The liquid was taken to Gibson Pilot Plant in Redwood City by Erickson, Inc of Richmond, using a hazardous waste manifest Drums were retained by Parker Environmental as future groundwater purge and wash water containers for this facility Gioundwater flow direction was to the northeast in November, 1993, compared to the north in August, 1993, and to the southeast in May, 1993 MW-2 and MW-3 were non-detect at last monitoring, in August, 1993 MW-1 had 160 ppb FPH-g (non-detect for benzene), while MW-4 had 41,000 ppb TPH-g and 2,200 ppb benzene II Current Activities - Groundwater samples were obtained on September S, 199 1'l-ke skEmnwi was removed fiom MW-4 and inspected No product was pi esent in the collection chamber of the skimmer or in the well The skimmer was not replaced Prior to sampling, groundwater elevation measurements were obtained using an electric water-level meter Results are presented in the table below Table 1 - Well Data Cheaper' Store #37 15 East Grant Line Road, Tracy, Califorma September 8, 1994 Well # Well Top Elevation Depth to GW GW Elevation* MW-1 100 20 677 9343 MW-2 100 20 673 9347 MW-3 101 40 783 9357 MW-4 9920 578 9342 * An aebitrary elevation of 100 0' was established on the site for the GW elevation All elevations given in feet Parker Envie oninental Services, 190 East 7th Street, Pittsbui g, CA 94565-2317 Phone (510) 439-1024 tax (510) 439-2566