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Well Construction Details ' Former Unocal Station No 2859 1665 Pacific Avenue, Stockton Well Depth to Blank Screened Hydrostratigraphic Sand Bentonite Cement/ Number Bottom Casing Interval Unit Pack Seal Grout ft bgs ft bgs) (ft b s) (ft bgs) (ft bgs ft bgs Groundwater M nitorinq Wells MW-1 50 0 to 19 19 to 50 A 20 to 50 19 to 20 0 to 19 MW-2 50 0 to 19 19 to 50 A 19 to 50 18 to 19 0 to 18 MW-3 50 0 to 19 19 to 50 A 20 to 50 19 to 20 0 to 19 MW-4 54 0 to 24 24 to 54 A 22 to 54 20 to 22 0 to 20 MW-5 54 0 to 24 25 to 54 A 22 to 54 20 to 22 0 to 20 MW-6 60 A MW-7 55 A MW-8 55 0 to 30 30 to 55 A 29 to 55 28 to 29 0 to 28 MW-9 55 0 to 30 30 to 55 A 29 to 55 28 to 29 0 to 28 MW-10 60 0 to 50 50 to 60 A 48 to 60 45 to 48 0 to 45 MW-11 60 0 to 50 50 to 60 B 48 to 60 45 to 48 0 to 45 MW-12 90 0 to 85 85 to 90 B 84 to 90 80 to 84 0 to 80 MW-13 60 0 to 50 50 to 60 A 48 to 60 45 to 48 0 to 45 I MW-14 91 5 0 to 85 80 to 90 B 84 to 91 5 80 to 84 0 to 80 MW-15 60 0 to 50 50 to 60 A 48 to 60 45 to 48 0 to 45 MW-16 91 0 to 85 85 to 90 B 84 to 91 80 to 84 0 to 80 MW-17 60 0 to 50 50 to 60 A 48 to 60 45 to 48 0 to 45 lieMW-18 9075 0 to 85 85 to 90 B 84 to 90 75 80 to 84 0 to 80 MW-19 91 25 0 to 85 85 to 90 B 84 to 91 25 80 to 84 0 to 80 MW-20 90 0 to 85 85 to 90 B 83 to 90 78 to 83 0 to 78 MW-21 60 0 to 50 50 to 60 A 48 to 60 45 to 48 0 to 45 NP-1 92 0 to 85 85 to 92 B 84 to 92 79 to 84 0 to 79 Air Si2arne Well f SP-1A 30 0 to 27 5 27 5 to 30 A 25 to 30 20 to 25 0 to 20 SP-1B 60 0 to 57 5 57 5 to 60 B 55 to 60 50 to 55 0 to 50 SP-1 C 90 0 to 87 5 87 5 to 90 B 85 to 90 80 to 85 0 to 80 SP-2A 30 0 to 27 5 27 5 to 30 A 25 to 30 20 to 25 0 to 20 SP-213 60 0 to 57 5 57 5 to 60 B 55 to 60 50 to 55 0 to 50 SP-2C 90 0 to 87 5 87 5 to 90 B 85 to 90 80 to 85 0 to 80 ' SP-3A 30 0 to 27 5 27 5 to 30 A 25 to 30 20 to 25 0 to 20 SP-313 60 0 to 57 5 57 5 to 60 B 55 to 60 50 to 55 0 to 50 Va or Extraction Wells ' VW-1 VW-2 VW-3 1 ' 06940-357 1 ENSR Corporation