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i 1 1 Quarterly Report - Second Quarter 2004 , WEST CLAY,PROPERTIES 639 West Clay Street, Stockton, California ; TABLE OFICONTENTS ' 1 a' SECTION « 4 rPAGE „ 3 1.0 INTRODUCTION . : . . .. ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I i I I I 2.0. PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 I ry `II y 2 1 QUARTERLY GROUND WATER MONITORING 2 1 1 Well Monitoring and Evacuation 1 ' 2 12 f. Collection and Analysis of Ground Water Samples 2 30. FINDINGS 1. . . . . . ... . . . . . ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3 1 GROUND WATER GRADIENT AND FLOW DIRECTION 3 32 ANALYTICAL RESULTS OF WATER SAMPLES 3 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.0. SUMMARY AND CONCLUSIONS • 4 '. 5.0. RECOMMENDATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 6.0. LIMITATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1. . . . . . . . . . . . . . . . 6 FIGURES 4 Figure 1 -Location Map F Figure 2 - Site Plan { Figure 3 - Shallolv,Ground Water Elevations w Figure 3 -Deep Ground Water Elevations " Figure 5 - Shallow Ground Water Contamination Plume 1 Figure 6 -Deep Ground Water Contamination Plume � f 1 TABLES Table 1 -'Ground,Water Elevations' 1 Table 2 -Analytical Results of Ground Water Samples - TPH and BTEX Table 3 -Analytical Results of Ground Water Samples -EPA Method 8260B 1 Table 4 -Analytical Results of Historical Ground Water Samples - TPH and BTEX Table 5 -,Analytical Results of Historical Ground Water Samples -EPA Method 8260B 1 F I Advanced GeoEnvironmental,Inc ! 1 ^ 1 4 S A 1 I ` E