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' TABLE 3 ANALYTICAL RESULTS OF GROUND WATER SAMPLES ' ANALYZED BY EPA METHODS 8260m Chapin Bros , Inc 1766 Monte Diablo Avenue, Stockton, California ' (µg/1) Sample ID Di-isopropyl Ethyl Methyl- tertiary-Amyl tertiary- Ether(DIPE) tertiary- tertiary Butyl Methyl Ether Butanol Butyl Ether Ether (TAME) Alcohol (ETBE) (MTBE) (TBA) ' MW-1/12-04-97 <3 0 <3 0 80 <3 0 93 MW-1/03-31-98 <1 0 <1 0 5.3 <1 0 <5 0 ' MW-1/06-30-98 <3 0 <3 0 38 <3 0 29 MW-1/09-30-98 <10 <10 13 <10 15 MW-1/12-30-98 <10 <10 33 <10 120 MW-1/03-30-99 <1 0 <1 0 23 <1 0 <5 0 ' MW-1/06-29-99 <1 0 <1 0 44 <1 0 18 MW-1/10-06-99 15 <5 0 13 <1 0 15 MW-1/12-29-99 22 <1 0 15 <1 0 46 ' MW-1/04-07-00 <5 0 <5 0 14 <5 0 <25 MW-1/07-31-00 39 <1 0 23 <1 0 91 MW-1/11-02-00 59 <1 O 25 <1 0 69 '. MW-1/05-03-01 <5 0 <5 0 23 <5 0 44 MW-1/09-08-01 <5 0 <5 0 36 <5 0 41 MW-1/01-26-02 69 <5 0 42 <5 0 85 ' MW-2/12-04-97 <1 0 <1 0 <5 0 <1 0 <5 0 MW-2/03-31-98 <1 0 <1 0 <5 0 <1 0 <5 0 MW-2/06-30-98 <1 0 <1 0 <1 0 <1 0 <5 0 ' MW-2/09-30-98 <1 0 <1 0 <1 0 <1 O <5 0 MW-2/12-30-98 <1 0 <1 0 <1 0 <1 0 <5 0 , MW-2/10-06-99 <1 0 <1 0 <1 0 <1 0 <5 0 ' MW-2/12-29-99 <1 0 <1 0 <1 0 <1 O <5 0 MW-2/04-07-00 <1 0 <1 0 <1 0 <1 O <5 0 MW-2/07-31-00 <1 0 <1 0 <1 0 <1 0 <5 0 ' MW-2/11-02-00 <1 0 <1 0 <1 0 <1 0 <5 0 MW-2/05-03-01 <1 O <1 0 <1 0 <1 0 <5 0 MW-2109-08-01 <1 0 <1 0 <1 0 <1 0 <5 0 ' MW-2/01-26-02 <1 0 <1 0 <5 0 <10 <25 Y 1 • ' Advanced GeoFnvironmental,he