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i I Quarterly Monitoring Report City of Stockton - FIRE STATION#2 110 West Sonora Street, Stockton, California Table of Contents Page 1.0. INTRODUCTION AND SCOPE OF WORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 I2.0. PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 21 SOIL-VAPOR EXTRACTION MONITORING 1 i 22 MONITORING WELL INSTALLATION 2 2 2 1 Dnlling and Sampling 2 2 2 2 Well Completion 2 I2 2 3 Well Development 2 23 WELL MONITORING AND EVACUATIONS 3 2 3 1 Well Monitonng and Evacuation 4 2 3 2 Ground Water Sample Collection. and Analysis 4 3.0 FINDINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 31 SOIL-VAPOR EXTRACTION 4 32 ANALYTICAL RESULTS OF SOIL-GAS VAPOR SAMPLES 5 I• 33 GROUND WATER GRADIENT AND FLOW DIRECTION 5 34 ANALYTICAL RESULTS OF GROUND WATER SAMPLES 6 I40. SUMMARY AND CONCLUSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5.0. RECOMMENDATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 6.0 LIMITATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 I FIGURES Figure 1 -Location Map Figure 2 -Site Plan Figure 3 - Ground Water Elevation Map TABLES i Table 1 -Soil vapor extraction monitoring data Table 2 -Analytical Results of soil vapor samples-EPA 8015 18020 Table 3 - Ground Water data I Table 4-Analytical Results of Water Samples- EPA 8015 18260 Modified Table 5 -Analytical Results of Water Samples -EPA 8260 Modified APPENDICES iAppendix A-Historical Background . Appendix B - Ground Water Monitoring Well Purge Data Appendix C -Laboratory Report of Water Samples Advanced GeoEnvuronn=ta1,Inc I