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AWA►uA► MAWAWA A Working to Restore Nature near the tank cavity and groundwater beneath the site Data collected from the three wells during previous monitoring events are presented in Tables 1 and 2. In addition, water quality data for an onsite domestic water well are provided in Table 1 In October 1993, RESNA observed drilling of three offsite (HP-2, HP-3 and HP-4) and three onsite soil bonngs (HP-1, HP-5, and HP-6) to groundwater (RESNA, January 26, 1994, Report 123020 01) Groundwater samples were collected from these borings using a Hydropunch sampling device RESNA also observed drilling of three additional soil bonngs onsite near the UST's (B-1, B-2, and B-3), these borings were converted to vapor extraction wells VW-1, VW-2, and VW-3 Residual gasoline hydrocarbons were detected in soil samples obtained from borings B-1, B-2, and B-3, but were not detected in the other onsite or offsite borings. Dissolved gasoline hydrocarbons were not detected in groundwater from onsite or offsite borings GROUNDWATE q ITORING, FIRST QUARTER 1994 On March 9�3a technician from RESNA measured the depth to water and subjectively analyzed groundwater samples from the three monitoring wells (Table 1) The technician observed floating product in wells MW-1 and MW-2 A groundwater sample was collected from well MW-3, wells MW-1 and MW-2 were not sampled because floating product was present On April 7, 1994, a technician from RESNA was onsite and collected a . groundwater sample from the domestic well (Table 1) Our field procedures are described in an attachment to this report The surveyed elevations and the depth to groundwater measurements, summarized in Table 1, were used to evaluate the potentiometnc surface beneath the site. The groundwater flow direction on March 9, 1994, was generally to the northeast with a hydraulic gradient of approximately 0 001 (Plate 3) The water samples was analyzed for total petroleum hydrocarbons as gasoline (TPHg) using modified Environmental Protection Agency (EPA) Method 8015 and benzene, toluene, ethylbenzene, and total xylene isomers (BTEX) using EPA Method 602. The samples was analyzed at Sparger Technology, Inc in Sacramento, California (Hazardous Waste Testing Laboratory Certificate No 1614) Results of analyses indicated TPHg and BTEX concentrations were below laboratory detection limits in well MW-3 and the domestic well The results of analyses are summarized In Table 1 Copies of the laboratory Analysis Reports and Cham of Custody Record are attached WORD IN PROGRESS We understand that Ruiz Grocery has submitted a reimbursement request to the State 037AIgoi/123MO-1 2