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L � 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 �p{ 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 to MW-6 02/21/89 18 2 PVC 0.02 6 16 10 On Site Over-Drill MW-7 Off Site PREVIOUSLY DESTROYED MW-8 02/25/93 27 4 PVC 0.02 5 25 20 Off Site Over-Drill - MW-9 02/25/93 25 y PVC 0.02 3 23 20 Off Site Over-Drill /07'-MW-10 11/08/94 25 22 PVC 0.02 11 25 14 Off Site Over-Drill MW-11 11/08/94 25 2 PVC 0.02 10 25 15 Off Site Over-Drill MW-12 On Site DESTROYED IN 2006 MW-13 Off Site DESTROYED IN 2006 MW-14 05/01/02 55 6 PVC 0.02 28 53 25 Off Site Over-Drill 9 r� 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 -2 MW-17B 05/14/03 40 2 PVC 0.01 30 40 10 Off Site Over-Drill Z l� 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 �(+3p MW-21B 12/20/03 50 2 PVC 0.01 45 50 5 Off Site Over-Drill MW-22C 12/19/03 63 2 PVC 001 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 op 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 1,I 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 Jun: 25 2= PVA '0'02-- '10 - 25�---15.0- QRSite - -6verDrill- �O-� �IP-3 June 2007 25 2 PVC 0.02 10 25 15.0 On Site Over-Dr 11 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 g IP-11 June 2007 50 2 PVC 0.02 35 50 15.0 Off Site Over-Drill 1,04 P-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 ,-.QIP-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 10.0 Off Site Over-Drill I -17 07/10/09 51 2 PVC 0.02 44.5 50.5 6.0 Off Site Over-Drill t0 Notes: TOC=top of casingD''2�n�We Jmarked as"Previously Destroyed"were indicated by Stantec in August 2009;no date was provided msl=mean sea level r1`�U - bgs=below ground surface _✓ PVC=polyvinyl chloride '-co-located in one boringr�-tt NA=Not available "-co-located in one boring r L49 -11 to-3 -I P-z MG1-4 P+� - 'T` 'P '�5 Mui-ll 1P-f2 MCo Mko 4-27 h1to'f5 ►F-3 C1 7)0 111Wz�c l�' -IG 4, Mw /0 +f3 yd/��'il6ro{1tiion nd Destruction Details 1 of 1 Cardno ATC Project Number 75.75118.0888