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TAB" 2 SUMMARY OF HISTORICAL GROUNDWATER GAUGING AND LABORATORY ANALYTICAL DATA Circle K Store No. 08671 9606 Thornton Road, Stockton, California TOC Approximate Top of Depth Groundwater TPN-G Benzene Toluene Etbylbetmerte Total Xylenes MTBE TAME TBA DIPS ETEE ENanol PSHEDC ittB/1-) EDB Utg L) Well Elevation eConstructed S G oundl Elevation Thickness 1p8/L) (vPJL) (p8'L) (pg/L) (VBti) (KWL) (VF/L) (Ft6/L) WEIL) (V8/L) (1$L) S mple Dal ove To l W 11D pd1 Elevation Tlvckness Number (petabove (feet below (feat above (feet) (feet below (fe< above MSL)' TOC) MSL) TOC) MSL) BPA Method 82608 WW 9 10/14/2005 14.2] IOj 3].]2 -23.45 0.011 ND<50 ND<0.50 DG 50 ND<0.50 ND<I.D ND<0.50 ND<050 ND<5.0 ND<0.50 ND<0.50 ND<0.50 ND<050 ND<50 MW-9 1/18'2006 14.27 105 34,39 -20. 12 0.00 NDc50 ND<050 ND<o.50 ND<0.50 ND<1,0 ND<0.50 ND<050 ND<5.0 ND<10 ND<o50 ND<0.50 ND<p,50 ND<100 MW-9 4/13/2006 14:27 105 31. 18 -16.91 0.00 ND<50 ND<0,50 ND<050 ND<0.50 ND<L0 ND<050 ND<0.50 NDclo ND<0.50 ND<0.50 70`10.50 bi <0.50 ND<ione MW-9 7/11/2006 14.2] 105 31.96 -17.69 0.00 ND<50 77<050 NDc050 70`10.50 ND MW-9 10'3012006 14.27 105 35.13 -20.86 0,00 ND<50 ND<O50 ND<0,50 ND<O.50 ND MW-9 2/23/200] 14.2] 105 32.84 -18.5] 0.00 ND :50 ND<0.50 ND<.50 ND<0.50 ND MW-9 4/26/2007 14.27 105 32.19 -17.92 0.00 71X50 0.86 12 2.3 12 NI)<0.50 N'D<050 ND<i0 ND<0.50 Io0`10.50 ND<D.50 ND<0.50 NDQ0 MW-9 8/9/200) 14.27 105 35.42 -21.15 000 NDc50 ND`10.50 70`10.50 70`10.50 N0<0,50 70`10.50 70`1050 ND<IO 70`10.50 70`10.50 70`1050 70`10.50 NDQ50 ) MW-9 10/25/200] 142] 105 3665 -22.38 0.00 ND<50 ND<0.50 ND<0.50 ND<0.50 ND<0.50 ND<0.50 ND<050 ND<10 ND<0.50 ND<D.50 ND<O50 ND<0.50 left MW-9 183/2008 14.2] 105 38.36 -24.09 0.00 NOG50 70`10.50 70`10.50 NDcO SII ND<LO 70`1050 NDc0.50 ND<IO ND<050 ND`10.50 ND<0.50 ND<0.50 ND<50 MW-9 5/19/2008 14,27 105 33.43 -19.16 0.00 ND<50 ND<0.50 M<0.50 ND<,5D ND<I.0 N�<O�50 ND<.50 NDc10 ND<D.50 ND<0.50 ND<O50 ND<0.50 ND<50 MW-9 ]/10/2008 14,2] 105 }532 -21.05 0.00 ND<50 NDgo5o ND<0.50 ND<0.50 ND<I.0 ND<0.50 ND<l0 ND<O5o ND<050 ND<0.50 7 `10.50 NDQ50 MW-9 11/3/2008 142] 105 3].16 -22.89 0.00ND<50 NE<0.50 ND<0,50 ND<0S0 ND<1.0 ND<0.50 ND<10 ND<0 so 70`10.50 ND<050 ND<0.50 ND<50 MW-9 2/I2/2G09 14,2] 105 35.85 -21 .58 0.00 ND<SD 70`10.50 70`10.50 70`10.50 NDc10 ND<.50 ND<10 ND<0,5D Np<050 70`10.50 70`10.50 ND<$G M\A'-9 4/14/2009 142] 105 }q2] -2p00 0.00 ND<50 ND<050 ND<0.50 ND< 5D ND<I.0 ND<O50 ND<l0 70`10,50 ND<O50 ND<O50 ND<050 ND<S0 ] 2009 142] IOS 2110000ND<5oND<050 ND<0.50 ND<0.50 ND< 0 ND<0.50 ND<IO ND<0.50 ND<0.50 ND< .50 ND`10.50 ND<50 0'2009 42] 105 }7,28 -23.111 MW-9 2/2/2010 14.2] IOS 35.0] -2030 -MW-9 ]ll/2010 142] 10533.35 -1958 0.00 ND<SO 70`10.50 Np<0.50 70`10.50 NE<I.0 70`10.50 ND<IO Npc0.50 70`1050 70`10.50 70`10.50 ND<50 MW-9 1/20/2011 14.2] 105 32]9 -13.52 0.00 ND<50 I ,fi 70`10.50 70`10,50 13 70`10.50 ND<IO 70`10.50 NDc050 70`10.50 ND<p.SD NDQ50 MW-9 >/IS/2011 14.2] 105 30.5] -1630 000 ND<Sp 70`10.50 70`10.50 ND<0.50 Np<10 ND`10.50 ND<10 ND<0.50 ND<0.50 ND<0.50 ND`10.50 ND<50 MW-10 III0/2003 14.06 111 - 0.00 ND<50 ND<050 ND<0.50 ND<.50 ND<1.0 NDQ.O ND< D 70`1100 ND<2.0 ND<2.0 ND<.0 ND<2.0 NDc500 MW-IO 2/112004 14.06 111 35.81 -21.]5 11.00 ND<50 70`1050 70`10.50 ND<0.50 ND<1.0 NDQ.O ND<.0 ND<100 ND<2.0 NDQ,O ND<.0 aHXto NE<500 MW-10 5114/2004 14.06 111 3j,pl -20,95 0.00 ND<50 70`10.50 1.9 NDc0:50 2.4 1.1 ND<050 Nr) 5.0 ND<I.0 ND<050 ND<0.50 ND<0,50 ND<50 MW-10 8/-0/2004 14.06 Ill 37.96 -23.90 0.00 ND<50 70`10.50 Np<O 50 70`10.50 ND<I.0 2.3 70`10,50 ND<5.0 ND<1.0 70`10.50 70`10.50 ND<0.$D NEG50 MW-10 11/2112004 14.06 Ill 37.96 -23.90 0.00 ND<50 ND<0.50 ND<o.so ND<0.50 ND<l.0 ND<0.5o ND<0.50 ND<5.0 ND<1.0 ND<0.50 ND<0.50 ND<0.50 ND<50 MW-10 11262005 14.06 111 35.33 -21.2] 000 52 ND`1050 1.1 70`10.50 1.4 ND<O50 70`1050 ND<5.0 70`10.50 70`10.50 NDN.50 70`10.50 ND`150 MW-10 4/188005 14.06 111 32.6fi -18.60 0.00 ND<SO 70`1050 ND<OStl 70`10.50 ND<I.0 NDc050 ND<050 ND<5.0 70`10.50 NDc0.30 ND`10.50 71X0.50 ND<50 MW-10 8/23/2005 14.06 ill 35.80 -21.]4 0.00 ND<50 NDG0,50 70`10,50 70`10.50 ND<1.0 ND<050 ND<0.50 ND<ID ND<050 ND<0:50 ND<0.50 ND<o50 M <1000 MW-10 I1V14/2005 14.06 111 36. 17 -22.11 0.00 ND<50 70`1050 70`10.50 70`10.50 ND<I.0 70`1050 ND`10.50 ND<5.0 70`10.50 ND`10.50 NE`10.50 70`10,50 ND`1SD } 77V 10 1/188006 14.06 111 34.02 -19.96 0.00 ND<50 70`1050 70`10.50 NE<0.50 ND<I.0 ND<0.50 ND<0.50 ND<60 ND<1.0 ND<.50 ND<0.50 N[rcoso NDc100 MW� 10 4/131200fi 14.06 111 30.83 -1677 0.00 Ni)<50 ND<0.50 ND<0.50 ND<0.50 ND<I.0 ND<0.50 ND<o50 ND<IO ND<0.50 ND<.50 ND<050 ND<0.50 ND<IoW \1W- 10 711112006 14.06 111 31.48 -17.42 0.00 ND<50 ND<0.50 ND<O50 ND<0.50 ND MW- 10 10/30/2006 14.06 Ill 34.60 -20.54 0.00 ND<50 ND<050 ND<0.50 NDc0.50 ND<I.0 ND<0.50 ND<0.50 NDc10 NDcJo50 NDc0.50 70`10.50 ND<0,50 ND<I000 MW-10 2/2g/200] 14 06 111 32.44 -18.38 0.00 ND<50 70`10,50 NDcp,50 ND<D:$D ND<IO ND<0.5D 70`10.50 ND<1D 70`10.50 ND<D.$D 70`10.50 ND<050 70`11000 MW- 10 4/26/200] 14.Dfi Ill 31.]5 -1].69 0,00 130 2.8 32 6.3 32 ND<0.50 70`10.50 ND<IO 70`10.50 70`10.50 ND`10.50 ND`10.50 NDQ50 MW- 10 M12007 14,06 III 34.33 -20.2] 0.00 ND« ND<0.50 70`10.50 70`10.50 ND<G.$G 70`10.50 ND`10.50 ND<IO NE<D.$D ND<0511 ND<0.50 ND<0.50 ND<Sp MW'- 10 1025/200] 14.Ofi ill 36.18 -22.12 0.00 M3<50 NE<0.50 ND<0.50 ND<050 70`1050 ND<O50 ND<p.$p 77 70`10.50 ND<0,$D 70`10.50 ND`10.50 NDQ50 MW-10 1123'2008 14.06 iii J4.16 -20.10 0.00 ND<50 70`10.50 70`10.50 70`10,50 NDc1.0 ND`1050 ND`1050 ND<iD 70`10.50 70`1050 70`10.50 NDc0.50 NDQ50 MW-10 5/19/2008 14.06 tti 33,00 -18.94 0.00 NDG50 ND<0.50 ND<050 ND<0.50 ND<1.0 ND<0:50 ND<050 ND<ID ND<o.50 ND<0.50 ND<0.50 ND<0.50 ND<250 MW-10 7/10/2008 14.06 111 34,75 -20.69 0.00 ND<50 70`10.50 70`10,50 NDc0.50 ND<I.0 ND`1q.50 ND<0 50 ND<IO 70`10.50 ND<0.50 ND<.50 75`1050 ND<50 MW-10 11/3/2006 14.06 111 36.66 60 000 NE<50 ND<0.10 ND<G.$0 ND<0.50 ND<110 70`10.50 ND<0.50 ND<Ip ND<0:50 ND<0.50 ND<050 70`10,50 NDQ50 MW-IO 2/12/2009 14.06 111 35.20 -21.14 000 ND<50 70`10.50 70`10.50 70`1050 ND<I:0 ND<0.5D ND`10.50 ND<I0 70`10.50 70`10.50 70`10.50 70`10.50 I ND<50 8671 Historical GW Tabic (3Q 2011) Page 9 of 10 ATC PmIat No. 075 73119.2781