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TABLE 1 WELL CONSTRUCTION DETAILS PG&E Former Tracy MGP Site Tracy,California Well To of Ground Bentonite Bentonite Well Well Borehole Slot Size Measured Depth To S (in) in) Diameter Depth Water In creen Screen p Sand Pack Santl Pack Well ID Diameter Casing Well De Casing Surface Seal To Seal Screen Screen Pn) ftterval Length P Top Bottom ( BTOC) (H BTOC) (H bgs) (H) Elevation Elevation Elevation Bottom Elevation Elevation TOP Bottom B0 ( 4 W (H AMSL) (H AMSL) (ft AMSL) Elevation (H AMSL) (ft AMSL) Elevation Elevation JB1 TP-1' (R P /j TW-1 4 8 Sch.40 PVC 0.01 11.50 7.97 8.5 to 11.5 3 41.35 40.24 318634.86 34.86 29.86 32.86 29.86 2r 18 Sch.40 PVC 0.01 21.25 8.00 Ito 22 15 41.29 41.66 40.66 35.66 35.66 19.66 3468 19.66 1<, TW"2 4 8 Sch.40 PVC 0.01 20.29 9.06 5.5 to 20.5 15 41.33 41.62 40.62 36.62 36.62 21.12 36.12 21.12 2[ TW-3 4 8 Sch.40 PVC O.D1 20.01 8.01 6 to 21 15 39.65 40.16 39.16 35.16 35.16 19.16 34.16 19.16 15 11r� TW-4 4 8 Sch.40 PVC 0.01 28.30 8.18 2410 29 5 39.88 40.24 39.24 17.24 17.24 11.24 16 24 11.24 11 TW-5R 4 8 Sch.80 PVC 0.01 27.01 6.25 6.5 to 26.5 20 40.26 40.75 39.75 35.25 35.25 14.25 34.25 14.25 13 t TW-6 4 8 Sch.80 PVC 0.01 26.68 8.35 6.5 to 26.5 20 40.32 40.67 39.67 35.57 35.57 14.37 34.37 14.37 13 t TW-7 4 8 Sch.80 PVC 0.01 26.64 8.12 6.3 to 26.3 20 TW-e 4 8 Sch.80 PVC 0.01 22.18 7.99 6.5 to 21.5 15 41.20 47.57 40.57 36.57 36.57 20.07 35.07 20.07 19 li TW-11 4 37.35 4 8 Sch.80 PVC 0.01 TW-11 26.20 8.05 5.5 to 25.5 20 41.43 41.85 40.85 37.35 16.35 36.35 16.35 i 8 Sch.80 PVC 0.01 25.18 7.98 4.7 to 24.5 20 41.04 41.73 40.73 36.23 38.23 17.03 37.03 17. 16' y 8Sch.80 PVC 0.01 30 2 24.48 8.63 3.9 to 2 . 0 4169 . 41.93 40.93 38.43 38.43 18.03 36.03 18 17 'J•{ TW-12 4 8 Sch.80 PVC 0.01 26.45 6.16 6 to 26 20 41.32 41.60 40.60 37.10 37.10 15.60 35.60 15. 1` Iia TW-13 4 8 Sch.BO PVC 0.01 25.01 8.62 4.1 to 24.1 20 41.97 42.31 41.31 37.31 37.31 18.21 38.21 18.21 17 r TW-14 4 8 Sch.80 PVC 0.g1 26.11 7.97 6 to 26 20 41.30 41.82 40.62 37.82 37.82 15.82 35.82 15.82 15 I-;1 EP-1- 12 NA Sch.80 PVC 0.05 11.63 7.00 6.3 to 11.3 - 5 40.30 4NA EP-2 6 NA Sch.BO PVC 0.1 12.48 7.95 7.2 to 12.2 5 41.24 41.74 1.72 NA NA NA NA NA 35.44 31.14 30 EP-3 6 NA Sch.80 PVC 0.1 11.18 7.76 5.9 to 10.9 5 41.35 41.78 NA NA NA N 34.52 29.22 29 NA NA 35.88 39.58 30. (1r� EP-4 6 NA Sch.80 PVC 0.1 11.31 7.96 6.0 to 11.0 5 41 26 41.74 NA 30 0 rZr EP-5 6 NA Sch.80 PVC 0.1 8.08 DRY 44 80 0, 2.8 to 7.8 5 41.12 41.57 NA NA NA NA 35.74 NA NA NA 38.77 33.47 33. 74 IhC Al-SG1 0.25 3 TeTfleflon/Sn/Stainless Mesh 5.0 ) Al-SG2 NA 4.25 to 5 0.75 NM NM 40.3 37.3 37.3 35.8 36.6 35.8 35 0 25 3 otain ess Mesh 5.0 NA 4.25 to 5 0 75 NM NM 40.3 37 3 37.3 35.8 36 6 35.8 35 J2 Al-SG3 0.25 3 TeFlon/Stainless Mesh 5.0 NA 4.25 toy 0.75 NM NM (� B1-SG1 0.25 3 Teflon/Stainless Mesh 5.0 40.3 37.3 37.3 35.8 36.6 35.8 35 1-SG1 0.25 3 TeFlon/Stainless Mesh NA 4.25 toy 0.75 NM NM 40.3 37.3 37.3 35.8 36.6 35.6 35 5.0 NA 4.25 to 5 0.75 NM NM 40.3 37.3 37.3 35.8 36.6 35.8 35 •� D1-SG1 0.25 3 Teflon/Stainless Mesh 5.0 NA 4.25 toy 0.75 NM NM 40.3 37.3 37.3 35.8 36.6 35.6 35 W` E7-SG1 0.25 3 Teflon/Stainless Mesh 5.0 NA 4.25 toy 0.75 NM NM 40.3 37.3 37.3 35.8 36.6 35.8 35 J2-S A2-SG1 0.25 3 Teflon/Stainless Mesh 5.0 NA 4.25 to 5 0.75 NM NM 40.3 37.3 37.3 35.8 36.6 35.8 35 (tY B2-SG1 0.25 3 Teflon/Stainless Mesh 5.0 NA 4.25 to 5 0.75 NM NM 40,3 37.3 37.3 35.6 36.6 35.6 35 J C2-SG1 0.25 3 Teflon/Stainless Mesh 5.0 /bf N A3-SG4 0.25 3 TefloNStainless Mesh 5.0 NA 4.25 to 5 0.75 NM NM 40.3 37.3 37.3 35.8 36.6 35. 35 Ikli A3-SG5 0.25 3 TeFlon/Stainless Mesh 50 A 4.25 toy 0.75 NM NM 40.3 37.3 37.3 35.8 36.6 35. 35. l7� A3-SG6 0.25 3 Teflon/Stainless Mesh 5.0 Nq 4.2510 5 0.75 NM NM 40.3 37.3 37.3 35.8 36.6 3 /}{ NA 4.25 to 5 0.75 NM NM 35 B3-SG1 0.25 3 Teflon/Stainless Mesh 5.0 NA 4.25 toy 0.75 NM NM 40.3 37.3 37.3 35.8 38.6 35. 35. C3-SGt 0.25 3 TefloNStainless Mesh 5.0 NA 4.25 to 5 0.75 NM NM 40.3 37.3 37.3 35.8 36.fi 35.8 35. Ix D3-SG1 0.25 3 TeFlon/Stainless Mesh 5.0 NA 4.25 to 5 0.75 NM NM 40.3 37.3 37.3 35.8 36.6 35.8 35. I� OIP-1 1 NA Sch.40 PVC 0.03 erf. 12.0 8.0 Horizontal 20.00 NM NM OIP-2 1 NA Sch.40 PVC 0.03 art. 12.0 8.0 Horizontal 20.00 NM NM NA NA NA NA NA NA N 17. OIP-3 1 NA Sch.40 PVC 0.03 ert. 12.0 8.0 Horizontal 20.00 NM NM NA NA No NA NA NA rk� OIP4 1 NA Sch.40 PVC 0.03 ert. 12.0 6.0 Horizontal 20.00 NM NM NA NA NA NA NA N IZ 0IP-5 1 NA Sch.40 PVC 0.03 ert 12 0 8.0 Horizontal 20 DO NM N NA NA NA NA NA NA N OIP-6 1 NA Sch.401 0.03 ert. 12.0 B.D Horizontal 20.00 NM NM NA NA NA NA NA Nq 1 IF150 NA . NA NA NA NA NA N NOTES. it BTOC=Feet below top of casing it bgs=Feet below ground surface NA=Not applicable it AMSL=Feet above can sea level PVC=Polyvinyl chloride in=Inches NM=Not measured `=Elevations estimated relative to nearby surveyed well TW-4 Pert=Hand drill-perforated t=Elevations estimated using 40.8 it AMSL as an average ground surface elevation for all soil gas sample points All elevations relative to North American Vertical Datum of 1988(NAVD88);latitude/longltude data relative to Noah American Datum of 1983(NAD83) r