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Quarterly Report - Second Quarter 2005 i GEWEKE LAND DEVELOPMENT & MARKETING 16 South Cherokee Lane, Lodi, California TABLE OF CONTENTS SECTION PAGE 1.0. INTRODUCTION AND SCOPE OF WORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I 2.0. PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2.1. WELL MONITORING AND PURGE PROCEDURES . . . . . . . . . . . . . . . . . . . . 2 2.2. COLLECTION AND ANALYSIS OF GROUND WATER SAMPLES . . . . . . . 2 3.0. FINDINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3.1. GROUND WATER GRADIENT AND DIRECTION . . . . . . . . . . . . . . . . . . . . . 3 3.2. ANALYTICAL RESULTS OF GROUND WATER SAMPLES . . . . . . . . . . . . . 3 3.3. OZONE SPARGING REMEDIATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 4.0. DISCUSSION AND CONCLUSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 • 5.0. RECOMMENDATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 6.0. LIMITATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 FIGURES Figure I - Location Map Figure 2 - Site Plan Figure 3 - Ground Water Elevation Figure 4 -Approximate Extent of Dissolved TPH-g Figure 5 -Approximate Extent of Dissolved Benzene Figure 6 -Approximate Extent of Dissolved 1,2-DCA TABLES Table 1 - Ground Water Elevations Table 2 -Analytical Results of Ground Water Samples -March 2005 Table 3 -Analytical Results of Ground Water Samples - General Minerals Table 4 -Analytical Results of Ground Water Samples -Metals Table 5 -Analytical Results of Historical Ground Water Samples Table 6 - Historical Ground Water Flow Directions Advanced GeoEnvironmentsl,Inc.