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TABLE 1 ` GROUNDWATER MONITORING DATA l IE Former Beacon Station No 12419 I 2350 Waterloo Road, Stockton California ethyl- I it Depth to TOC GW WellEDate TPHg benzene toluene benzene xylenes MTBE' DfPE ETBE TAME TBA methanol ethanol DCA EDS GW Elevation Elevation 1 Number (uglL (uglL) (ug/L) (uglL) (uglL) (ug/L) ug/L) (ug/L) u 1L) (uglL) (u !L) (ug/L) ugll_) (ug1L) (feet) (feet sea level) (feet sea level) Comments iMIWA 03/31198 65 <0 50 <0 50 <0 50 <0 50 <5 0 1 nal na na na h na na na na 4804 2111 -26 93 screened 06/10198 <50 <0 50 <0 50 <0 50 <0 50 <50 J! nal nal na na na na na na 42 50 21 39 ` interval 09/08198 230 8 1 058 <0 50 0 72 <0 501 <0 50 <0 50 c0 50 17 <50 <50 na na 4695 -25 84 no odor 1 no sheen 65-85' 11112!98 ns ns ns ns ns ns it ns i ns� ns ns t ns ns ns ns 20 36 wellhead survey 12/30/98 87 <0 50 <0 50 <0 50 <0 50 <5 0 r na na na na na na na na 4533 -2497 no odor 1 no sheen 03/26/99 55 <0 50 <0 50 <0 50 <0 50 '050', <0 50 <0 50 <0 50 <5 0 <50 <10 na ne 41 116 -2080 no odor 1 no sheen 06/02/99 180 74 <0 50 051 <0 50 c050,4 1050 110 50 1050 <5 0 <50 <5 0 78 <0 50 4064 -2028 no odor 1 no sheen 08/31/99 260 <0 50 c0 50 o.51 <0 50 <0 50, <0 50 <0 50 <0 50 16 <50 <50 130 <0 50 4546 2510 no comment 12!09199 <50 <0 50 <0 50 <0 50 <0 50 <0 50 5' <0 50 <0 50 '050 --50 <50 <5 0 59 <0 50 4695 -26 59- OZ21100 <50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <5 0 <50 <5 0 17 <0 50 4526 d -2490 no odor!no sheen 05/18/00 <50 <0 50 27 <0 50 <0 50 <0 50 ti <0 5d <0 50 <0 50 <5 0 <50 <5 0 na na 3968 -1932 no odor/no sheen 09126100 <50 <0 50 c0 50 <0 50 <0 50 <5 0 „ na na na na Ana na na na 4876 -2840 no odor I no sheen 12120!00 <50 <0 50 <0 50 <0 50 <0 50 <5 0 ;' na na na na na na na na 4735 -2699 no odor 1 no sheen 03/27101 <50 <0 50 <0 50 <0 50 <0 50 <5 0 !; nal na na na na na na na 4613 2577 no odor!no sheen 1 06126101 <50 <0 50 <0 50 1 <0 50 <0 50 <0 50" <0 50 <0 50 <0 50 "So <50 <5 0 33 <0 50 4870 -2834 no odor 1 no sheen 09!05101 130 <0 50 <0 50 <0 50 <0 50 <5 0na! nal na na na na na na 5378 -3342 no odor 1 no sheen 11130!01 <50 <0 50 <0 50 <0 50 <0 50 <5 0 na nal- na na na na na na 53 78 33 42 no odor 1 no sheen r 02/26102 <50 <0 50 <0 50 <0 50 <0 50 <50 I{ na I na 1 na na na na na na 50 46 l -3010 no odor!no sheen 05/16/02 <50 <0 50 15 <0 50 <0 50 055 11<0 50 <0 50€ <0 50 <5 0 <50 <50 14 <0 50 5062 2193 -2869 no odor!no sheen I 09112!02 110 <0 50 085 <0 50 G <0 50 <5 0 I( na na 11 na na na na na na 58 72 _ 36 79 no odor!no sheen 12104102 <50 <0 50 <0 50 <0 50 <0 50 <50 t na na na na na na na na 56 99 -3506 no odor!no sheen 02/17/03 <50 < 1 I 050 cD 50 <0 50 c0 50 <0 50; na na na na na na na na 5385 3192 no odor 1 no sheen 06!02103 <50 <0 50 <0 50 <0 50 <0 50 <0 50 <050 <0 50 <0 50 <50 1 <50 <5 0 8 4 <0 50 53 24+� � -31 31 no odor 1 no sheen 09/18/03 ns ns ns ns ns ns It ns ns ns ns ns ns ns ns nm y nm not sampled I 11/24/03 ns ns ns ns ns ns ns ns 11 ns ns ns ns ns ns 5848 -3655 not sampled = r !!! I 02123!04 <50 <D 50 0 85 <0 50 <D SD c0 50 ,:<0 50 <0 50 <0 50 <5 0 '<50 <50 40 <0 50 5500 3307 no odor-/-no sheen 06107/04 ns ns ns ns ns ns h ns le ns ns ns ns ns ns ns 55 38 , -3345 not sampled - 09l07104 ns ns ns ns ns nsns ns ' ns ns ns ns ns ns 61 89 C -3996 not sampled 12110/04 ns ns ns ns ns ns j; ns I ns ns ns ns ns ns ns 5951 -3758 not sampled 03/08/05 <50 <0 50 077 <0 50 <0 50 <0 50 h<0 50 <0 50 <0 50 <5 0 <50 <5 0 13 <0 50 5589 -3396 odor I no sheen 05124!05 ns ns ns ns ns ns1, ns 1' ns ns ns ns ns ns ns 5100 -2907 _ not sampled 08/31/05 ns ns ns ns ns ns { ns ns' ns ns ns ns ns ns 5623 -3430 not sampled 12/12105 ns ns ns ns ns ns ns I ns ns ns ns ns ns ns 5329 a -31 36 not sampled 1 j IT a 419grn _ { Pmlect as Pof 16 I HORIZON ENVIROAm MCI- ` - n