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. TABLE 1 GROUND WATER MONITORING AND CHEMICAL RESULTS FORMER REGAL STATION 603 6425 PACIFIC AVENEUE, STOCKTO14 CALIFORNIA WELL # I CASING I DATE IDEPTH TO I PROD IVACUUM (CORRECTED (TOTAL PET IBENZENE TOLUENE ETHYL XYLENES {METHYL t- {ELEVATION I I TOP OF I THICK IAT WELL I GW ELEV I HYDAOCARA I BENZENE (BUTYL ETHER ]FEET AMSL { I WATER I IHE= IFT AMSL I GAS-RANGE I I 1 { I IN FEET 1I0 FEET 11N FEET I 1 PPM ] PPB PPB PPB PPB ! PPB I 1 I I I ] I I I MW-6 1 9 08 104/12/89 1 50 36 I 0 I ] -40 48 1 I ! I ]05/04/89 1 I 0 ] I 1 <0 5 I 17 <0 5 <0 5 <0 5 ! 1 9 88 105/22/89 1 51 1 0 1 1 -41 12 1 I 1 9 88 108/24/89 1 53 46 I 0 1 I -43 58 I <1 000 1 200 <10 <10 <10 1 1 9 88 110/10/89 I 53 48 1 0 1 1 -43 6 I I 1 1 9 88 111/02/89 I 54 47 { 0 I I -44 59 I I 1 1 9 88 112/01/89 1 54 32 { 0 I I -44 44 ] I 1 1 9 88 101/12/90 1 53 17 ] 0 I 1 -43 29 1 <0 5 1 11 2 <0 3 3 I 1 9 88 102/19/90 1 52 94 1 0 I 1 -43 06 1 I { 1 9 88 102/26/90 I 53 08 ] 0 I 1 -43 2 1 ] ] 1 9 88 105/25/90 1 53 25 { 0 I 1 -43 37 10 01/0 09• 1 3000 200 <30 <90 I 1 9 88 111/27/90 1 $4 52 1 0 1 I -44 64 1 1 3 ] 2900 180 <15 130 ] 1 9 88 103/29/91 1 54 68 [ 0 { 1 -44 8 1 0 4 1 160 91 <0 3 240 1 1 9 88 106/27/91 I 54 98 1 0 { { -45 1 1 0 85 1 2100 360 3 390 1 I 9 88 109/18/91 I 54 91 1 0 { { -45 03 I 0 69 1 1500 220 <3 310 1 I 9 88 112/17/91 I 54 35 1 0 1 1 -44 47 I 0 24 1 110 14 <0 3 17 1 ] 9 88 101/21/92 I 53 74 I 0 1 0 002 1 -43 86 1 1 I 1 9 88 102/04/92 f 53 52 I 0 1 0 1 -43 64 I 1 1 9 88 103/10/92 1 53 3 1 0 1 0 I -43 42 I 40 05 1 1 3 <0 3 <0 3 eO 9 1 ] 9 88 104/29/92 ] 53 64 1 0 I 0 I -43 76 I I ! I 9 86 106/18/92 { 54 45 I 0 1 0 1 -44 57 1 <0 05 1 <0 3 <0 3 cO 3 <0 9 1 1 9 88 107/16/92 { 54 66 I 0 1 0 1 -44 78 { I I 1 9 88 106/14/92 { 55 16 1 0 1 0 1 -45 28 I I ! 1 9 88 109/22/92 { 55 16 I 0 I 0 I -45 28 I <O 05 1 <0 3 <O 3 <0 3 <0 9 I 1 9 88 109/25/92 1 55 68 I 0 1 4 007 1 -45 61 ] I I CERT SVY ] 12 01 110/08/92 f 55 8 I 0 1 0 02 I -43 81 I 1 ! 1 12 01 111/11/92 { 55 38 I 0 I 0 01 1 -43 38 { ] 1 1 12 01 112/09/92 { 55 04 I 0 1 0 01 I -43 04 ] <0 05 1 <0 3 e0 3 <O 3 <0 9 I 1 12 01 101/15/93 ] 54 42 I 0 1 0 00 1 -42 41 ] I 1 1 12 01 102/08/93 1 54 46 I 0 1 0 20 1 -42 65 1 I 1 1 12 01 103/11/93 53 32 I 0 I 0 03 I -41 34 I <0 05 { <0 3 <O 3 <0 3 <0 9 1 1 12 01 104/15/93 1 52 5 I 0 1 0 01 1 -40 50 I ] I 1 12 01 105/18/93 1 51 52 1 0 1 0 02 I -39 53 I I I 1 12 01 106/14/93 I 51 66 1 0 1 0 02 I -39 67 I <0 05 1 <0 3 <O 3 <0 3 <0 9 1 1 12 01 107/19/93 I 51 53 1 0 1 0 C2 1 -39 54 I I 1 12 01 108/20/93 I 51 82 1 0 I O 02 I -39 63 I I 1 �.. ion I51 92 f n I n n2I -IQ 42 1 12 01 109/15/93 1 52 1 0 1 0 00 I -39 99 I I 1 I 12 01 109/29/93 I 52 12 1 0 1 0 00 ( -40 11 I I I 1 12 01 109/29/93 1 52 1 { 0 1 0 01 1 -40 10 I <0 05 1 <0 3 <0 3 <0 3 <0 9 1 [ 12 01 111/05/93 { CAR { 0 1 0 09 1 1 I { 1 12 01 112/22/93 I 51 04 I 0 1 0 04) 1 -39 03 I <0 05 1 <0 5 <0 5 <0 5 <0 5 { 1 12 01 102/10/94 I CAR I 0 ] 0 00 1 1 ! 1 12 01 103/04/94 1 49 53 I 0 I 0 02 1 -37 54 18010 = all compounds below detection limits 1 1 12 01 103/29/94 1 49 04 ( 0 I 0 007 1 -37 04 1 <O 05 I <0 5 <0 5 <0 5 <2 1 �. 4