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TABLE B SUMMARY OF GROUNDWATER ANALYTICAL RESULTS FORMER ECCNO GAS STATION 4325 EAST WASHINGTON STREET STGCKTOM CALIFORNIA ETHYL- WELL DATE BENZENE BENZENE TOLUENE XYLENES TPHg COMMENTS ID SAMPLED u u (u,00).-- A it MW-27 10/03/91 ND(0 50) ND(0 50) ND(0 50) ND(1 5) ND(50) 01/28/92 ND(0 50) ND(0 50) ND(0 50) ND(1 5) ND(50) 05/21/92 ND(0 50) ND(0 50) ND(0 50) ND(i 5) ND(50) 08/24/92 ND(0 50) ND(0 50) ND(0 50) ND(1 5) ND(50) 12/16/92 052 ND(0 50) ND(0 50) ND(1 5) ND(50) 01/29/93 ND(0 50) ND(0 50) ND(0 50) ND(1 5) ND(50) 05/26/93 ND(0 50) ND(0 50) ND(0 50) ND(1 5) ND(50) 08/19/93 ND(0 50) ND(0 50) ND(0 50) ND(1 5) ND(50) 06/07/94 ND(0 50) ND(0 50) ND(0 50) ND(1 5) ND(50) 05/04/95 ND(0 50) ND(0 50) ND(0 50) ND(1 5) ND(50) 02/23/96 NS NS NS NS NS Sampled Annually 06/06/96 ND(O 30 ND(O 30 ND 0 30 ND(O 60 ND(50) MTBE = 11 1 MW-28 10/03/91 ND(0 50) ND(0 50) ND(0 50) ND(i 5) ND(50) 01/28/92 ND(0 50) ND(0 50) ND(0 50) ND(1 5) ND(50) 05/21/92 ND(0 50) ND(0 50) ND(0 50) ND(1 5) ND(50) 08/24/92 ND(0 50) ND(0 50) ND(0 50) ND(1 5) ND(50) 12/16/92 ND(0 50) ND(0 50) ND(0 50) ND(1 5) ND(50) 01/29/93 ND(0 50) ND(0 50) ND(0 50) ND(1 5) ND(50) 05/26/93 ND(0 50) ND(0 50) ND(0 50) ND(1 5) ND(50) 08/19/93 ND(0 50) ND(0 50) ND(0 50) ND(1 5) ND(50) 06/07/94 ND(0 50) ND(0 50) ND(0 50) ND(1 5) ND(50) 05/04/95 ND(0 50) ND(0 50) ND(0 50) ND(1 5) ND(50) 02/23/96 NS NS NS NS NS Sampled Annually 06/06/96 ND(O 30 ND(O 30 ND(O 30 ND(O 60 ND(50) MTBE = ND(l 0 MW-29 10/04/91 053 ND(0 50) ND(0 50) ND(1 5) ND(50) 01/28/92 066 ND(0 50) ND(0 50) ND(1 5) ND(50) 05/21/92 ND(0 50) ND(0 50) ND(0 50) ND(1 5) ND(50) 08/24/92 056 ND(0 50) ND(0 50) ND(1 5) ND(50) 12/16/92 ND(0 50) ND(0 50) ND(0 50) ND(1 5) ND(50) 01/29/93 ND(0 50) ND(0 50) ND(0 50) ND(1 5) ND(50) 05/26/93 ND(0 50) ND(0 50) ND(0 50) ND(1 5) ND(50) 08/19/93 ND(0 50) ND(0 50) ND(0 50) ND(1 5) ND(50) 06/07/94 ND(0 50) ND(0 50) ND(0 50) ND(1 5) ND(50) 05/04/95 ND(0 50) ND(0 50) ND(0 50) ND(1 5) ND(50) 02/23/96 NS NS NS NS NS Sampled Biannually 06/06/96 ND(O 30 ND(O 30 ND(O 30 ND(O 60 ND(50) MTBE = 3 0 MW-30 10/04/91 38 ND(0 88) 15 ND(2 5) 340 Slight Sheen 01/28/92 25 ND(1 2) ND(1 0) ND(3 2) 710 05/21/92 98 ND(0 50) 10 ND(1 5) 220 08/24/92 12 ND(1 0) 17 ND(2 7) 320 12/16/92 47 ND(0 50) ND(0 50) ND(1 5) 170 01/29/93 27 ND(0 50) ND(0 50) ND(1 5) 67 05/26/93 ND(0 50) ND(0 50) ND(0 50) ND(1 5) ND(50) 08/19/93 ND(0 50) ND(0 50) ND(0 50) ND(1 5) ND(50) 06/07/94 ND(0 50) ND(0 50) ND(0 50) ND(1 5) ND(50) 05/04/95 ND(0 50) ND(0 50) ND(0 50) ND(1 5) ND(50) 02/23/96 ND(0 30) ND(0 30) ND(0 30) ND(0 60) ND(100) 06/06/96 ND(0 30) 1 ND(0 30) ND(0 30) ND(0 60) ND(50) MTBE =4 7 NOTE& 1)TPHg w Td d Pefit ttm Hy*oowas 2)Kra- Tot-owEaw, 3)Mwt-mwawwm Pw*w oaft 1w N", 4)NS yr not Sampled,san*w Amu* "n wW gfiAr-W are l ovoi ad*mftdy,a%mrsong 8nm ana won w Ehe NO *aE Dollocted dotecifan foft in Pmmhosw B-1