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WELL/PROBE CONSTRUCTION SPECIFICATIONS Montgomery Ward,Stockton,California GROUND WATER MONITORING WELLS Page 1 of 1 Well Depth to Blank Screened Sand Bentonite Cement _ Number Bottom Casing Interval Pack Seal Grout (in feet bgs*) (in feet bgs) (in get bgs) (in feet bgs) (in feet bgs) (in feet bgs) MW-1 68 oto 48 (48,to 68 43 to 68 40.7 to 43 0 to 40.7 MW-2 68 0 to 48.5 45.5 ro 68.5 43 to 68 415 to 43 0 to 41.5 MW-3 67 0 to 47 47 to 67 45 to 67 43 to 45 0 to 43 MW-4 68 0 to 48 48 to 68 46 to 68 44 to 46 0 to 44 MW-5 68 0 to 48 48 to 68 46 to 68 44 to 46 0 to" MW-6 675 Oto 47.5 47.5 to 67.5 455 to 47.5 43.5 to 455 0 to 43.5 i MW-7 67 0 to 42 42 to 67 40 to 67 375 to 40 0 to 375 i VAPOR EXTRACTION AND COMBINATION WELLS Well Depth to Blank Screened Sand Bentonite Cement Number Bottom Casing Interval Pack Seal Grout 3' (in feet bgs*) (in feet bgs) (in feet bgs) (in feet bgs) (in feet bgs) (in feet bgs) VEW-IA 26 0 to 10 10 to 25 S to 26 6 to 8 0 to 6 VEW-1B 66 0 to 25 25 to 40 23 to 41 21 to 23 --Fto 21 a 40 to 64 64 to 65 62 to 66 41 to 62 VEW-2 36 0 to 15 15 to 35 13 to 36 10 to 13 0 to t0 ,\ VEW-2B 51 0 to 35 35 to 50 33 to 51 31 to 33 --5'to 31 VEW-3 51 0 to 2020 m 30 IS to 31 16 to 18 0 to 16 30 to 40 40 ro 50 38 to 51 31 to 38 VEW-4 51 0 to 20 20 to 30 18 to 31 16 to I8 0 to 16 30 to 40 40 to 50 38 to 51 31 to 38 VEW-5 51 0 m 20 20 to 30 18 to 3l 16 to 18 0 to 16 30 to 40 40 to 50 38 to S I 31 to 38 SOIL VAPOR PROBES Soil Depth to Teflon Screened Probe Bottom Tubing Interval (in feet bgs) (in feet bgs) (in feet bgs) SP-IA 20 Oto 18 18m20 SP-IB 35 0 to 33 33 to 35 SP-2 25 0 to 23 23 to 25 SP-3 25 0 to 23 23 to 25 SP-4 25 0 to 23 23 to 25 SP-5 25 0 to 23 23 to 25 SP-6 25 0 to 23 23 to 25 SP-7A 200 to 18 18 to 20 4SP-7B 65 0 to 33 33 to 35 #SP-8 45 0 to 33 33 to 35 NOTES: -- *bgs-below ground surface _ #-backfilled with bentonte chips from 35 feet to bottom before setting the screened interval .