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Table 1 <br />Proposed Well Construction Details <br />Former Occidental Chemical Corporation (OCC) <br />Lathrop Facility <br />Well ID Injection Zone <br />Total <br />Depth <br />(ft bgs) <br />Outer <br />Borehole <br />Diameter <br />(in) <br />Outer Well <br />Casing <br />Diameter <br />(in) <br />Depth to <br />Bottom of <br />Outer Well <br />Casing (ft <br />bgs) <br />Outer Well <br />Material <br />Sand <br />Pack <br />(ft bgs) <br />Sand Type Screen <br />Material <br />Blank <br />Material <br />Inner <br />Borehole <br />Diameter <br />(in) <br />Screen <br />Diameter <br />(in) <br />Slot Size <br />(in) <br />Top of <br />Screen <br />Interval <br />(ft bgs) <br />Bottom of <br />Screen <br />Interval <br />(ft bgs) <br />Screen <br />Length <br />(ft) <br />Drilling <br />Method <br />Injection Wells <br />320 328 8 <br />354 380 26 <br />404 414 10 <br />428 436 8 <br />482 492 10 <br />300 320 20 <br />340 382 42 <br />406 434 28 <br />468 496 28 <br />0.020 460 468 8 <br />0.020 476 506 30 <br />0.020 570 590 20 <br />0.020 602 608 6 <br />455-554 8X20 Sand 0.040 476 496 20 <br />0.065 569 589 20 <br />0.065 636 676 40 <br />0.070 60 94 34 <br />0.070 134 200 66 <br />ft bgs = feet below ground surface <br />in = inches <br />-- = unknown <br />TBD = to be determined <br />8IW-3R 628 16 245 411-628 15 <br />TBD <br />TBD TBD TBDTBD <br />TBD <br />TBD <br />TBD TBD <br />316 <br />Stainless <br />Steel <br />16 10TBD <br />INJ-13 210 24 20 50 <br />-- <br />--8.63 <br />8.63 <br />IW-2 <br />IW-1 503 <br />510 <br />---- <br />-- <br />16 <br />16 <br />Stainless <br />Steel253 <br />251 Stainless <br />Steel <br />-- <br />-- <br />IW-4 696 16 24 <br />Stainless <br />Steel554-710 <br />246 <br />6X16 Sand <br />Mild Steel <br />Air Rotary <br />Deep Injection Zone <br />Deep Injection Zone <br />Deep Injection Zone <br />Deep Injection Zone <br />Shallow Injection Zone 21 mix0-210 <br />8.6315 Mud Rotary <br />304 <br />Stainless <br />Steel <br />15 10 <br />Air Rotary <br />Air Rotary <br />Mud Rotary <br />-- <br />-- <br />-- <br />24 #2/16 16x30 Sand <br />Mud Rotary <br />IW-06 Shallow Injection Zone ~210 -- -- -- <br />316 <br />Stainless <br />Steel <br />16 10 Mud Rotary <br />TBD <br />TBD <br />--IW-05 Shallow Injection Zone ~210 -- -- <br />Mild Steel <br />-- <br />-- <br />Stainless <br />Steel <br />Stainless <br />Steel <br /> 304 <br />Stainless <br />Steel <br />Stainless <br />Steel <br />Mild Steel <br />SDR17 <br />PVC <br />Casing <br />SDR17 <br />PVC <br />Casing <br />Mild Steel <br />Mild Steel <br />Mild Steel <br /> 304 <br />Stainless <br />Steel