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" I 14 � II TABLE 1 GROUNDWATER MONITORING DATA Beacon Station No 12474 3440 East Main Street,Stockton,California r � � k ' ethyl- total Depth to TOC GW Well TPHg benzene toluene benzene xylenes MTBE DIPE ETBE TAME TBA methanol ethanol DCA EDB GWII Elevation Elevation It Number Date (ug/L) (uglL) (u IL) (uglL) (uglL} (ug/L) (ug/L) (ug/L) (ug1L) (ug1L) (ug/L) (ug/L) jug/L)(uglL (feet), (feet msl) (feet rri Comments 1,11111 03/31198 72 <0 50 .050 <0 50 <0 50 <50 no in na no no no no no 61 53' 2554 3599 screened 06/10198 ns ns ns no no no no no no no ns no no no 58 851 3331 no comment Interval 09/08198 in i ns ns ns ns ns no ns ns no ns ns no no 5B 941 3340 Iii no comment 75 91D 12/30/98 ns ns ns no ns ns ns ns ns ns ns ns no no 5606 3142 no comment 03/25199 73 <0 50 <0 50 <0 50 <0 50 <0 50 to 50 4 50 <0 50 <50 <50 <5 0 no no 55 011 2947 no comment 06!03!99 65 1 <0 50 <0 50 <0 50 -050 4050 to 50 -050 to 50 -50 <50 <5 0 88 <0 5D 5439 2885 "r no comment 08/30/99 <60 <0 50 <0 50 <0 50 <0 50 <o 50 <0 50 <0 50 <0 50 <5 0 <50 <5 0 80 <0 5D 56 611 31 07 no comment { { � 12l10/99 51 <0 50 <0 50 A 50 -050 <0 50 450 -050 <0 50 -50 <50 <5 0 60 <0 50 56 471 3093 Ali no comment 0311 <50 4050 <0 50 <0 50 <0 50 50 to 50 to 50 <D 50 <50 <50 <5 0 32 <0 50 55394 2985 no odor/no sheen 0622/00 <50 1 <0 50 <0 50 <D 50 .050 .050 to 50 <0 50 <0 50 <60 <50 21 18 <0 50 5432 2870 no odorino sheen 09/28/00 <50 1 <0 50 <0 50 <0 50 <0 50 <50 no no no no no na no no 56 711 31 17 "no odorino sheen 1221!00 <50 <0 50 <0 50 <0 50 <0 50 <50 no no no no no na no no 55 771 3023 no odorino sheen 0328/01 <50 <0 50 055 <0 50 -050 <50 na no no no no no na no 5485 2931 no odor/no sheen 0627101 <50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <50 <50 <5 0 11 <0 50 5645, 30 91 no odorino sheen 09106/01 <50 <0 50 .050 <0 50 063 .50 no no no no no no no no 5840 3295 no odorino sheen 12103/01 <50 <0 50 054 <0 50 <0 50 <50 no no no no no no no no 6892, 333B no odorino sheen 03101!02 <50 c0 So 0 63 <0 50 <0 50 <50 no no na na na no no no 57 72 3218 no odorino sheen 05120!02 <50 <D 50 054 c0 50 -050 <0 50 <0 50 <0 50 <0 50 <50 <50 <5 0 1 9 <0 50 5004, 27 52 3052 "no odor/no sheen 102 061 <50 1 c0 50 <0 50 <0 50 .050 <5 0 na no na no na no no na 6192 3440 no odorino sheen 12/06/02 230 191' 24 52 33 <0 50 no na no no no no na na 61 23 3371 0 odorino sheen 03/07/03 t 160 4 50 <0 50 '050 <0 50 <50 no no no no no no no na 6040 3288 odorino sheen 06103/03 <50 -050 -050 <0 50 <0 50 -050 450 <0 50 -050 t50 c50 <5 0 <050 <050 5917 31 65 it odorino sheen 06!28!03 no ns i ns no ns ns ns ns ns ns ns ns no no nmI nm " not sampled 1125!03 ns no na ns ns ns no no no ns ns ns ns no 62 311 3479 not sampled 03/1 110 1 3( 29 <o 50 36 450 .050 <0 50 <0 50 50 <50 <5 0 <050 <050 6100 2546 3554 no odorino sheen 06/08/04 no ns no no ns ns no ns no no no ns no no 61 511 3605 not sampled 09108!04 no ns ns ns no no no no ns no no ns ns no 6322 37 76 �I not sampled 12 0104 ns no 1 no ns ns no no no ns no ns ns ns ns 6329 3793 net sampled MWA 03/31/98 ns no� no ns no ns ns no ns ns no ns no no nm 25 15 nm notlocated screened 06!10798 ns ns F ns ns ns no ns ns no ns ns ns no ns nm nm I, not located Interval 09108/98 no ns( ns ns ns ns no ns ns no ns ns ns no nm nm if not located 65 BB 12130/98 no ns ns no no ns no no ns no ns ns no no nm nm �I paved over 0325199 ns ns ns ns ns ns no no ns no no ns ns ns nm nm paved over 08/30/99 ns no ns ns ns no no ns no no no ns ns no nm nm ;I paved over 12110199 ns no no ns ns no no ns no ns no no ns ns nm nm paved over 03103/00 no ns ns no ns no no ns no no no ns ns ns nm nm o paved over 06122100 ns ns ns no no ns no no no ns no ns ns ns nm nm paved over 09/28/00 <50 to 50 <0 50 <0 50 <0 50 <5 0 na no na na na no no no 5616 31. ono odorino sheen 12721!00 <50 <0 50 <0 50 <0 50 <0 50 <50 no no na na no no no na 5528 30 13 ono odorino sheen 03/28/01 <50 1 fl; 5 8 093 4 5 <5 D na no no na no no na no 54 41] 2926 ono odorino sheen 0627101 <50 <0 50 <0 50 -050 <0 50 <0 50 <D 50 <0 50 <0 50 <5 0 <50 <50 <0 50 <0 50 5590 3075 no odorino sheen 0911 <50 4 50 076 <o 50 1 6 <5 D no no no no no no no no 57 971 3282 no odorino sheen 12103/01 <50 <0 50 067 <0 50 <0 50 <5 0 na no na no no no no no 58 57l 3342 ono odorino sheen 0310/102 <50 -050 to 50 <0 50 4 50 <50 na no na na no na no no 5729 32 14 "no odorino sheen 05120/02 <50 to 50 <0 50 4 50 <0 50 <0 50 <0 50 <0 50 <0 50 <5 0 <50 <5 0 to 50 to 50 5755 27 13 3D 42 "ono odorino sheen 08/29/02 <50 c0 50 <0 50 4 50 0 51 <5 D no no no no no no no no 6053 3340 ono odoflno sheen 12/06/02 <50 <0 50 0 54 <0 50 <0 50 <0 50 na no no na na na no no 60 75 3362 no odorino sheen 03/05/03 1800 <0 50 0 6B <0 50 <0 50 <5 D na no no no no no na no 5982 32 69 ono odorfio sheen 06/03/03 2300 4 50 <0 50 <0 50 -050 <0 50 <0 50 <0 50 <0 50 '50 <50 <5 0 4 5 <0 5D 5893 31 80 'no odorino sheen 0829103 <50 <0 50 <0 50 <0 5o <0 50 <50 na na na na no no no no 61 00 3387 ono odorino sheen 1125/03 ns ns H no ns no no no no ns ns ns no ns ns 61 so 34 67 II not sampled 03101104 1200 100 200 20 110 <0 50 <0 50 <0 50 <0 50 4 0 <50 t50 057 <0 50 6050 2508 3542 no odorino sheen 0611 no ns ns ns no ns ns ns ns no no ns ns ns 61 03 3595 not sampled 09@9!04 <50 <0 50 <0 50 <050 to 50 <5 0 no na na no no no no no 6260 3760 no odorino sheen 12/08/04 ns no li no. ns ns ns ns no no no no no ns no fit 78 3770 not sampled , } r Y P + � 4741%ei 4s Wo Page 2 HOR7zorf E2MK0xMB IHC Figad l'lo