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! Iw Quarterly Report - Third Quarter 2003 COMFORT AIR, INC. ' 1607 Turnpike Road, Stockton, California TABLE OF CONTENTS SECTION PAGE 1.0. INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 ' 2.0. PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 21 QUARTERLY WELL MONITORING 1 2 1 1 Well Monitoring and Evacuation I ' 2 1 2 Ground Water Sample Collection and Analysis 2 • 3.0 FINDINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 ' 31 GROUND WATER ELEVATION AND GRADIENT 2 3 2 ANALYTICAL RESULTS FROM GROUND WATER SAMPLES 3 ' 4.0. SUMMARY AND CONCLUSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 ' 5.0. RECOMMENDATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 6.0. LIMITATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 FIGURES 1 Figure 1 -Location Map Figure 2 -Site Plan Figure 3 - Ground Water Elevations - Shallow Zone Figure 4 - Ground Water Elevation -Deep Zone Figure 5 - Shallow Ground Water Isoconcentrataons - TPH-g ' Figure 6 -Deep Ground Water Isoconcentrations - TPH-g Figure 7 -Shallow Ground Water Isoconcentrataons - 1,2-DCA Figure 8 -Deep Ground Water Isoconcentrataons - 1,2-DCA TABLES ' Table i - Ground Water Elevation Data Table 2 -Historical Analytical Results of Ground Water Samples - TPH-g and BTEX Table 3 -Historical Analytical Results of Ground Water Samples -EPA Method 8260B Table 4 -Analytical Results of Ground Water Samples - TPH-g and BTEX Table 5 -Analytical Results of Ground Water Samples - EPA Method 8260B Advanced GeoEnviron mental,Inc