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' Table 3-2 Well Construction Details Former Unocal Station No 2859 1665 Pacific Avenue, Stockton Well Depth to Blank Screened Screen Hydrostratigraphic SandBentonite Cement/ ID Bottom Casing Interval Length Unit Pack Seal Grout (ft b-qs fibs) (ft bas) ft (ftbs) ftbs ftbs Groundwater Monitoring Wells MW-1 50 0 to 19 19 to 50 31 A 20 to 50 19 to 20 0 to 19 MW-2 50 0 to 19 19 to 50 31 A 19 to 50 18 to 19 0 to 18 MW-3 50 0 to 19 19 to 50 31 A 20 to 50 19 to 20 0 to 19 MW-4 54 0 to 24 24 to 54 30 A 22 to 54 20 to 22 0 to 20 MW-5 54 0 to 24 24 to 54 30 A 22 to 54 20 to 22 0 to 20 ' Mw-6 60 0 -20 20-60 40 A MW-7 55 A MW-8 55 0 to 30 30 to 55 25 A 29 to 55 28 to 29 0 to 28 MW-9 55 0 to 30 30 to 55 25 A 29 to 55 28 to 29 0 to 28 MW-10 60 0 to 50 50 to 60 10 A 48 to 60 45 to 48 0 to 45 Mw-1 1 60 0 to 50 50 to 60 10 B 48 to 60 45 to 48 0 to 45 MW-12 90 0 to 85 85 to 90 5 B 84 to 90 80 to 84 0 to 80 MW-13 60 0 to 50 50 to 60 10 A 48 to 60 45 to 48 0 to 45 MW-14 91 5 0 to 85 80 to 90 10 B 84 to 91 5 80 to 84 0 to 80 MW-11 5 60 0 to 50 50 to 60 10 A 48 to 60 45 to 48 0 to 45 MW-16 91 0 to 85 85 to 90 5 B 84 to 91 80 to 84 0 to 80 MW-17 60 0 to 50 50 to 60 10 A 48 to 60 45 to 48 0 to 45 MW-18 9075 0 to 85 85 to 90 5 B 84 to 90 75 80 to 84 0 to 80 MW-19 91 25 0 to 85 85 to 90 5 B 114 to 91 25 80 to 84 0 to 80 MW-20 90 0 to 85 85 to 90 5 B 83 to 90 78 to 83 0 to 78 MW-21 60 0 to 50 50 to 60 10 A 48 to 60 45 to 48 0 to 45 NP-1 92 0 to 85 85 to 92 7 B 84 to 92 79 to 84 0 to 79 Ozone Sparge Wells SP-1A 30 0 to 27 5 27 5 to 30 25 A 25 to 30 20 to 25 0 to 20 SP-1 B 60 0 to 57 5 57 5 to 60 25 B 55 to 60 50 to 55 0 to 50 SP-110 90 0 to 87 5 87 5 to 90 25 B 85 to 90 80 to 85 0 to 80 SP-2A 30 0 to 27 5 27 5 to 30 25 A 25 to 30 20 to 25 0 to 20 SP-213 60 0 to 57 5 57 5 to 60 25 B 55 to 60 50 to 55 0 to 50 SP-2C 90 0 to 87 5 87 5 to 90 25 B 85 to 90 80 to 85 0 to 80 SP-3A 30 0 to 27 5 27 5 to 30 2 5 A 25 to 30 20 to 25 0 to 20 SP-3B 60 0 to 57 5 57 5 to 60 25 B 55 to 60 50 to 55 0 to 50 Va or Extraction Wells VW-1 0- 18 18-43 25 A VW-2 0-24 24- 53 29 A VW-3 0- 10 10- 27 17 A Notes Unit A 0 to 60 feet bgs Unit B 60 to 90 feet tags empty cell indicates data not available 116940-357 1 ENSR Corporation