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• Table 1 <br /> Construction Data for Groundwater Monitoring Wells and Piezometers <br /> PG&E McDonald Island Gas Storage Facility <br /> McDonald Island,California <br /> Base of Well <br /> Screen Interval Well TOC Depth Base of Well <br /> Well Depth Well Casing Elevation (ft below TOC) Elevation <br /> Number (ft bgs) Type (ft msl) (Note 4) (ft MS I) <br /> Groundwater Monitoring Wells <br /> MW-1RD 10.5-20.5 4"PVC -3.57 23.8 -27.4 <br /> MW-2 11-21 4"PVC -5.63 23.6 -29.2 <br /> MW-3 10.5-20.5 4"PVC 4.76 23.5 -28.3 <br /> MW4 10.5-20.5 4"PVC -2.25 23.6 -25.8 <br /> MW-5 27.5-37.5 4"PVC -5.10 40.6 -45.7 <br /> MW-6 10-20 4"PVC 4.60 23.2 -27.8 <br /> MW-7 10-20 4"PVC -2.49 23.1 -25.6 <br /> MW-8 10-20 4"PVC -5.82 22.6 -28.4 <br /> MW-9 15-25 4"PVC 0.69 27.5 -26.8 <br /> MW-10 34-49 2"PVC -9.35 50.9 -60.2 <br /> MW-11 82-97 2"PVC(Note 3) -5.78 98.2 -104.0 <br /> Piezometers <br /> P-1A 30-32.5 2"PVC -3.89 35.4 -39.3 <br /> P-1 B 20-22.5 2"PVC 4.21 25.4 -29.6 <br /> P-2A 14-16.5 2"PVC -8.50 19.0 -27.5 <br /> P-3A 18-21 2"PVC -10.79 23.7 -34.5 <br /> P-313 33.5-36 2"PVC -10.37 39.1 49.5 <br /> P-4A 15-17.5 2"PVC -9.00 20.6 -29.6 <br /> P-5A 10-20 2"PVC -11.86 23.1 -35.0 <br /> P-6A(Note 1) 26-36 2"PVC? -13.27 ? ? <br /> P-7 17-27 2"PVC -5.88 30.3 -36.2 <br /> WP-1(Note 2) NA 1.5"steel -15.15 10.7 -25.8 <br /> Temporary Piezometers <br /> TPZ-1 25-30 1"PVC NS 30.5(Note 5) NS <br /> TPZ-2 25-30 1"PVC NS 30.5(Note 5) NS <br /> TPZ-3 25-30 1"PVC NS 30.5(Note 5) NS <br /> TPZ-4 25-30 1"PVC NS 30.5(Note 5) NS <br /> TPZ-5 25-30 1"PVC NS 30.5(Note 5) NS <br /> Notes: <br /> 1. P-6A riser was destroyed,allegedly by a farmer in 1999. Piezometer currently has no visible surface features. <br /> Additional data not available. <br /> 2. WP-1 riser was destroyed. Well point currently has no visible surface features except for mangled steel casing, <br /> possibly only the riser,found on ground in general vicinity of previously plotted location of WP-1. <br /> 3. 10"steel conductor casing from 0'to 44'bgs. <br /> 4. Well depths from PG&E/TES field survey,October 25,2000,rounded to 0.1 feet. <br /> 5. Depth is approximate. <br /> NA=not available <br /> NS=not surveyed <br /> bgs=below ground surface <br /> It=feet <br /> mst=mean sea level <br /> PG&E McDonald Island Well Decommissioning Report Table 1 1 of 1 September 2009 <br />