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The groundwater in the vicinity of the site is semiconfined Groundwater elevation at the • site varies from a wet year high of 7 feet bgs to about 35-40 feet bgs during the previous drought period Groundwater flow direction at the site has generally been to the west since December 1997 QUARTERLY GROUNDWATER MONITORING 3/29/01 No groundwater samples were obtained during this quarter Six newly installed wells will be developed and sampled during the next quarter and the results presented in the 2"d Quarterly Monitoring Report 2001 During this quarter (February 12 - 15, 2001) five "Geoprobe" direct push borings were performed along the southern gutter area of Country Club Blvd (P-8 and P-9) and along the western gutter area of Mission Road (P- 10, P-1 i and P-12) west of the site The results of the findings from the probes will be presented in the 2"d Quarter 2001 report DEPTH TO WATER MEASUREMENTS Depth to water was measured at all wells on March 29, 2001 The measurements were made from the surveyed elevation at the top of casing at each well using an electrical air/water interface probe (Table 1) No free product or product sheen was observed in any of the monitor wells COLLECTION AND CERTIFIED ANALYSIS OF GROUNDWATER SAMPLES No groundwater samples were obtained during this quarter DISPOSITION OF WASTEWATER No groundwater was purged from the monitor wells Rinseate from decontamination of the "Geoprobe" investigation is temporarily contained on-site in labeled 55 gallon DOT approved drums RESULTS OF QUARTERLY GROUNDWATER MONITORING GROUNDWATER GRADIENT AND FLOW DIRECTION Figure 4 utilizes the new survey elevations supplied by Kleldsen, Sinnock & Keudeck, Inc survey dated May 1, 2001 The survey report will be included with 2nd Quarter 2001 report Casing elevations from the new survey showed a decrease of 0 54 to 0 55 feet in elevation Figure 4 shows the groundwater elevation gradient and flow direction • 2 Sanchez I" QM 2001