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TABLE 1 Well Construction and Destruction Details Former Tosco Bulk Terminal No.10013 3505 Navy Drive,Stockton,CA Casing Top of Bottom of Construction Boring Depth Casing Slot Size Screen Length Well I.D. Date (feet bgs) Diameter Material (inches) Screen Screen (feet bgs) Location Well Destruction Methods (inches) (feet bgs) (feet bgs) Groundwater Monitoring Wells MW-1 08/06/87 25 2 PVC 0.02 10 25 15 On Site Over-Drill MW-2 08/06/87 25 2 PVC 0.02 8 25 17 On Site Over-Drill MW-3 08/06/87 25 2 PVC 0.02 8 25 17 On Site Over-Drill MW-4 02/21/89 20 2 PVC 0.02 7 17 10 On Site Over-Drill MW-5 02/21/89 20 2 PVC 0.02 7 17 10 On Site Over-Drill MW-6 0221/89 18 2 PVC 0.02 6 16 10 On Site Over-Drill MW-7 Off Site PREVIOUSLY DESTROYED MW-8 0225/93 Z252 PVC 0.02 5 25 20 Off Site Over-Drill MW-9 02/25/93 PVC 0.02 3 23 20 Off Site Over-Drill MW-10 11/08/94 PVC 0.02 11 25 14 Off Site Over-Drill MW-11 11/08/94 PVC 0.02 10 25 15 Off Site Over-Drill MVJ-12 On Site DESTROYED IN 2006 MW-13 Oft Site DESTROYED IN 2006 MW-14 05/01/02 55 6 PVC 0.02 28 53 25 Off Site Over-Drill MW-15 05/16/03 25 2 PVC 0.01 10 25 15 Off Site Over-Drill MW-16 05/13/03 25 2 PVC 0.01 10 23 13 Off Site Over-Drill MW-17B 05/14/03 40 2 PVC 0.01 30 40 10 Off Site Over-Drill MW-18C 05/15/03 74 2 PVC 0.01 57 72 15 Off Site Over-Drill MW-19C 05/19/03 75 2 PVC 0.01 60 70 10 Off Site Over-Drill MW-20 12/22/03 30 2 PVC 0.01 9.5 29 20 Off Site Over-Drill MW-218 1220/03 50 2 PVC 0.01 45 50 5 Off Site Over-Drill MW-22C 12/19/03 63 2 PVC 0.01 62 72 10 Off Site Over-Drill Peizometers P-1 2003 25 2 PVC unknown 10 24.5 14.5 Off Site Over-Drill P-2 2003 25 2 PVC unknown 10 24.5 14.5 Off Site Over-Drill P-3 2003 25 2 PVC unknown 10 24.5 14.5 Off Site Over-Drill P-4 2003 45 2 PVC unknown 35 44.5 9.5 Off Site Over-Drill P-5 2003 45 2 PVC unknown 35 44.5 9.5 On Site Over-Drill P-6 2003 45 2 PVC unknown 35 44.5 9.5 On Site Over-Drill Remediation Wells IP-1 June 2007 Off Site PREVIOUSLY DESTROYED IP-2 June 2007 25 2 PVC 0.02 10 25 15.0 On Site Over-Drill IP-3 June 2007 25 2 PVC 0.02 10 25 15.0 On Site Over-Drill IP-4 June 2007 Off Site PREVIOUSLY DESTROYED IP-5 - June 2007 Off Site PREVIOUSLY DESTROYED IP-6 June 2007 Off Site PREVIOUSLY DESTROYED IP-7 June 2007 Off Site PREVIOUSLY DESTROYED IP-8 June 2007 Off Site PREVIOUSLY DESTROYED IP-9 June 2007 Off Site PREVIOUSLY DESTROYED IP-10 June 2007 50 2 PVC 0.02 35 50 15.0 Off Site Over-Drill IP-11 June 2007 50 2 PVC 0.02 35 50 15.0 Off Site Over-Drill IP-12 June 2007 50 2 PVC 0.02 35 50 15.0 On Site Over-Drill IP-13 June 2007 Off Site PREVIOUSLY DESTROYED IP-14 07/09/09 30 2 PVC 0.02 20 30 10.0 Off Site Over-Drill IP-15 07/14/09 45 2 PVC 0.02 35 45 10.0 Off Site Over-Drill IP-16 07/13/09 30 2 PVC 0.02 20 30 10.0Off Site Over-Drill IP-17 07/10/09 51 2 PVC 0.02 445 50.5 6.0 Off Site Over-Drill Notes: TOC=top of casing Wells marked as"Previously Destroyed"were indicated by Stantec in August 2009;no date was provided msl=mean sea level bgs=below ground surface PVC=polyvinyl chloride '-co-located in one boring NA=Not available co-located in one boring Well Construction and Destruction Details 1 of 1 Cardno ATC Project Number 75.75118.0888