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T4f E5 <br /> Historical S ..nalytical Data <br /> Former Arco Service Station No. 595 <br /> 6100 N. Highway 99, Stockton, California <br /> Sample MTBE <br /> Sample Depth Date GRO DRO B T E X MTBE (8260) TBA DIPE ETBE TAME Ethanol 1,2-DCA EDB Lead <br /> Name (feet) Sampled (mg/kg) (mglkg) (mg/kg) (mglkg) (mg/kg) (mg/kg) (mg/kg) (mglkg) (mg/kg) (mglkg) (mg/kg) (mg/kg) (mglkg) (mg/kg) (mg/kg) (mg/kg) <br /> Soil Boreholes(B and PSB)continued <br /> B-3 @ 25' 25 6/5/2000 -1.00 - -0.00500 <0.00500 -0.00500 -0.00500 -0.0500 - - - - - - - - - <br /> B-3 @ 40' 40 6/5/2000 1.88 0.0645 <0.00500 0.191 0.296 -0.0500 - <br /> PSB-1,50' 50 7/17/2001 11.0 - <0.0050 <0.0050 <0.0050 <0.0050 - <0.20 <2.5 -0.10 <0.10 -0.10 <25 -0.10 <0.20 - <br /> PSB-1,60' 60 7/17/2001 <1.0 - <0.0050 <0.0050 <0.0050 <0.0050 - <0.20 <2.5 <0.10 <0.10 <0.10 <25 -0.10 <0.20 - <br /> PSS-i,70' 70 7/17/2001 <1.0 - <0.0050 <0.0050 <0.0050 <0.0050 - <0.20 <2.5 <0.10 <0.10 <0.10 <25 <0.10 <0.20 - <br /> PSB-1,80' 80 7/17/2001 <1.0 - <0.0050 <0.0050 <0.0050 <0.0050 - <0.20 <2.5 <0.10 <0.10 <0.10 <25 <0.10 <0.20 - <br /> PSBA 90' 90 7/17/2001 <1.0 - <0.0050 <0.0050 <0.0050 <0.0050 - <0.20 <2.5 <0.10 -0.10 <0.10 <25 <0.10 <0.20 - <br /> PSB-1,98' 98 7/17/2001 <1.0 <0.0050 <0.0050 <0.0050 <0.0050 -0.20 <2.5 <0.10 <0.10 <0.10 <25 -0.10 -0.20 <br /> PSB-2,10' 10 7/19/2001 11.0 - <0.0050 <0.0050 <0.0050 <0.0050 - <0.20 <2.5 4.10 <0.10 <0.10 <25 <0.10 <0.20 - <br /> PSB-2,22' 22 7/19/2001 <1.0 - <0.0050 <0.0050 <0.0050 <0.0050 - <0.20 <2.5 <0.10 <0.10 <0.10 <25 -0.10 <0.20 - <br /> PSB-2,30' 30 7/19/2001 <1.0 - <0.0050 <0.0050 <0.0050 <0.0050 - <0.20 <2.5 <0.10 <0.10 <0.10 <25 <0.10 <0.20 - <br /> PSB-2,40- 40 7/19/2001 <1.0 - <0.0050 <0.0050 <0.0050 <0.0050 - <0.20 <2.5 <0.10 -0.10 <0.10 <25 <0.10 <0.20 <br /> PSB-2,50' 50 7/19/2001 <1.0 - <0.0050 <0.0050 <0.0050 <0.0050 - <0.20 <2.5 <0.10 -0.10 <0.10 <25 <0.10 <0.20 - <br /> PSB-2,54' 54 7/19/2001 <1.0 - <0.0050 <0.0050 <0.0050 <0.0050 - <0.20 <2.5 <0.10 <0.10 <0.10 <25 <0.10 <0.20 - <br /> PSB-2,64' 64 7/19/2001 <1.0 - <0.0050 <0.0050 <0.0050 <0.0050 - -0.20 <2.5 <0.10 <0.10 <0.10 Q5 <0.10 -0.20 - <br /> PSB-2,70' 70 7/19/2001 <1.0 - <0.0050 <0.0050 <0.0050 <0.0050 - <0.20 <2.5 <0.10 <0.10 -0.10 <25 <0.10 <0.20 - <br /> PSB-2,88' 88 7/19/2001 <1.0 - <0.0050 <0.0050 <0.0050 <0.0050 - <0.20 <2.5 <0.10 <0.10 <0.10 <25 <0.10 -0.20 - <br /> PSS-2,98' 98 7/19/2001 <1.0 - <0.0050 <0.0050 <0.0050 <0.0050 - <0.20 <2.5 -0.10 <0.10 <0.10 -25 <0.10 -0.20 - <br /> Monitoring Wells(MW) ` <br /> MW-1 @ S. 5 6/1/2000 -1.00 - <0.00500 <0.00500 -0 00500 <0.00500 -0.0500 - - - - - - - - <br /> MWA @ 15' 15 6/1/2000 <1.00 - <0.00500 -0.00500 -0.00500 <0.00500 <0.0500 - - - - - - - - <br /> MW-1 @ 30' 30 6/1/2000 <1.00 - <0.00500 <0.00500 <0.00500 <0.00500 <0.0500 - - - - - - - - - <br /> MWA@45 45 6/1/2000 <1.00 - <0.00500 <0.00500 <0.00500 <0.00500 <0.0500 - - - - - - - - - <br /> MW-1@60' 60 6/1/2000 <1.00 - <0.00500 10.00500 <0.00500 <0.00500 -0.0500 <0.100 <10.0 <0.100 <0.100 <0.100 - <0.100 <0.100 - <br /> MW-1@65' 65 6/1/2000 <1.00 - <0.00500 <0.00500 <0.00500 <0.00500 -0.0500 <0.100 <10.0 <0.100 <0.100 <0.100 - <0.100 <0.100 - <br /> MW-1 @ 75' 75 6/1/2000 <1.00 <0.00500 <0.00500 <0.00500 <0.00500 <0.0500 <0.100 <10.0 <0.100 <0.100 <0.100 -0.100 <0.100 <br /> MW-2 @ 5- 5 6/212000 <1.00 - <0.00500 <0.00500 <0.00500 <0.00500 0.288 - - - - - - - - <br /> MW-2 @ 15' 15 6/2/2000 <1.00 - <0.00500 <0.00500 <0.00500 <0.00500 -0.0500 - - - - - - - - - <br /> MW-2@30' 30 6/2/2000 <1.00 - <0.00500 <0.00500 <0.00500 <0.00500 <0.0500 - - - - - - - - <br /> MW-2@45' 45 6/2/2000 <1.00 - 0.0531 <0.00500 <0.00500 <0.00500 <0.0500 - - - - - - - - <br /> MW-2@55' 55 6/2/2000 <1.00 - <0.00500 <0.00500 <0.00500 <0.00500 <0.0500 <0.100 <10.0 <0.100 <0.100 <0.100 - <0.100 <0.100 <br /> MW-2@60' 60 6/2/2000 <1.00 - <0.00500 <0.00500 <0.00500 <0.00500 <0.0500 -0.100 -10.0 <0.100 <0.100 <0.100 - <0.100 <0.100 - <br /> MW-2 65' 65 6/2/2000 <1.00 <0.00500 <0.00500 <0.00500 -0.00500 <0.0500 <0.100 <10.0 <0.100 -0.100 <0.100 <0.100 <0.100 <br /> MW-3 @ 5' 5 6/5/2000 <1.00 <0.00500 <0.00500 <0.00500 <0.00500 <0.0500 - - - - - - - - <br /> MW-3 @ 15' 15 6/5/2000 <1.00 - <0.00500 <0.00500 <0.00500 <0.00500 <0.0500 - - - - - - - - <br /> MW-3 @ 30' 30 6/5/2000 <1.00 - <0.00500 <0.00500 <0.00500 <0.00500 <0.0500 - - - - - - - - <br /> MW-3 @ 45' 45 6/5/2000 <1.00 - <0.00500 <0.00500 -0.00500 <0.00500 <0.0500 - - - - - - - - <br /> MW-3 @ 60' 60 6/5/2000 <1.00 - <0.00500 <0.00500 <0.00500 <0.00500 -0.0500 <0.100 <10.0 <0.100 <0.100 <0.100 - <0.100 <0.100 - <br /> MW-3 @ 65' 65 6/5/2000 <1.00 - <0.00500 <0.00500 <0.00500 <0.00500 <0.0500 <0.100 <10.0 <0.100 <0.100 -0.100 - <0.100 <0.100 - <br /> MW-3 @ 70' 70 6/5/2000 <1.00 - <0.00500 <0.00500 <0.00500 <0.00500 <0.0500 <0.100 <10.0 <0.100 <0.100 <0.100 - <0.100 <0.100 - <br /> MW-3 C&75' 75 6/5/2000 <1.00 <0.00500 <0.00500 <0.00500 <0.00500 <0.0500 <0.100 <10.0 <0.100 <0.100 <0.100 - -0.100 <0.100 - <br /> MW-4 @ 5' 5 6/6/2000 <1.00 - <0.00500 <0.00500 <0.00500 <0.00500 <0.0500 - - - - - - - " <br /> MWA@ 15' 15 6/6/2000 <1.00 - <0.00500 <0.00500 <0.00500 <0.00500 -0.0500 - <br /> MW-4 @ 30' 30 6/6/2000 <1.00 - <0.00500 <0.00500 <0.00500 <0.00500 <0.0500 <br /> MW-4@45' 45 6/6/2000 -1.00 - <0.00500 <0.00500 <0.00500 <0.00500 <0.0500 - - - - - - - - - <br /> MW4 @ 55' 55 6/6/2000 -1.00 - <0.00500 <0.00500 <0.00500 -0.00500 <0.0500 <0.100 -70.0 <0.100 <0.100 -0.100 - -0.100 <0.100 - <br /> MW4@60' 60 6/6/2000 -1.00 - 0.0399 -0.00500 <0.00500 0.0207 0.147 0.308 <10.0 <0.100 <0.100 <0.100 - -0.100 <0.100 - <br /> MW4 0 65' 65 6/6/2000 <1.00 -0.00500 <0.00500 <0.D0500 10.00500 <0.0500 <0.100 <10.0 -0.100 <0.100 <0.100 <0.100 <0.100 <br /> MW-5@15' 15 7/23/2001 <5.0 - <0.025 0.025 <0.025 0.029 - <0.10 110 -0.10 <0.10 <0.10 - <0.10 <0.10 - <br /> < <0.025 <0.025 - <0.10 <10 10.10 <0.10 <0.10 - <0.10 <0.10 <br /> MW-5@25' 25 7/23/2001 15.0 - 0.043 0.025 " <br /> MW-5@35' 35 723/2001 15.0 - <0.025 <0.025 <0.025 -0.025 - <0.10 <10 <0.10 <0.10 -0.10 - <0.10 -0.10 - <br /> MW-5@45' 45 7232001 15.0 <0.025 <0.025 <0.025 <0.025 -0.10 <10 <0.10 -0.10 -0.10 <0.10 -0.10 <br /> 6Q6 Arr-n Hisfnrical cnil k Pana 9 of A Stantec <br />