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Quarterly Report - Second Quarter 2005 • PACIFIC PRIDE - SOUTH EL DORADO STREET 3147 South El Dorado Street, Stockton,California I TABLE OF CONTENTS 1 SECTION PAGE ' 1.0. INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2.0. PROCEDURES . . . ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2.1. WELL MONITORING AND PURGING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2.2. GROUND WATER SAMPLING . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . 2 ' 2.3. LABORATORY ANALYSIS OF GROUND WATER SAMPLES . . . . . . . . . . . 2 3.0. FINDINGS . . . . . . . . . . . . . . . . . . . . . . . . ... . . . . . . . . ... . . . . . . . . . . . .": . . . . . . . . . . .3 3.1. GROUND WATER ELEVATION AND GRADIENT . . 3 3.2. LABORATORY RESULTS OF GROUND WATER SAMPLES . . . . . . . . . . . . 4 4.0. SUMMARY AND CONCLUSIONS ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 5.0. RECOMMENDATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 6.0: LIMITATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 FIGURES Figure I - Location Map P Figure 2 -Site Plan ' Figure 3 - Vertical Gradient Cross Section D-D' Figure 4 -Inferred Ground Water Elevations: First Water Zone Figure 5 -Estimated Extent of First Zone Dissolved TPH-g " ' Figure 6 -Estimated Extent of First Zone Dissolved 1,2-DCA ' TABLES Table 1 -Summary of-Monitoring Well Details Table 2 - Ground Water Monitoring Data Table 3 -Analytical Results of Ground Water Samples by EPA Methods 8015MI8020 ' Table 4 -Analytical Results of Ground Water Samples by EPA Methods 8260/8020 ' Advanced GeoEnvironmental,Inc.