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� ic � � � � � � LE 2 ANALYTICAL TESTING RESULTS Montgomery Ward Auto Service Center Former Unocal Branded Service Station#5098 Stockton, California P per er billion Page 13 of 14 Sample M DTW TPH-G BENZENE N-BUTYL 1,2-DCA I EB 1PB MTBE NAPHT N-PB TOLUENE 1,2,4-TMB 1,3,5-TMB XYLENES 03/24/97 _ NM NS NS NS NS NS NS NS NS NS NS NS NS NS 06/18/97 NM NS NS NS NS NS NS NS NS NS NS NS NS NS 09/16/97 46 10 <50 <050 NA NA <0 50 NA_ <5 0 NA - NA <0 50 NA NA <0 50 _ 12/10/97 - NM_ _NS _ NS� NS NS- NS _NS NS NS NS NS_ NS NS NS _ 03/18/98 NM NS_ -_ NS _ NS NS NS NS NS NS NS NS NS NS NS 06/24/98 NM NS NS NS NS NS- NS NS NS _NS NS NS- NS _ NS 09/15198 _ _ 4058 <50 <0 50 NA NA <0 50 NA _<5 0 NA_ NA <0 50 NA _NA <1 0 12/22/98 3221 <50 <0 50 NA NA <0 50 NA 40 NA NA — I 1 NA NA 2 1 DELTA COLLEGE WELL - 06/24/98- - <50 - <10 --<10 -<20 <10 <10 <20 <10 <10 <10 <10 <30 T<30 12/22/98 <50 <10 <1 0 <1 0 <10 <10 <2 0 <1 0 <1 0 <10 <1 0 <3 0 <2 0 NOTES W ---- -- - --- - -- -� - - — - -�---- - — -Only compounds which we re detected are shown on this table (i ) Samples taken on 12-19-95 were analyzed outside of their holding time L An additional compound, 1,2-Dichloropropane was detected in Montgomery Ward well MWA (5 3 ppb)sampled on 12-06-94 An additional compound, 1,2-Dichloropropane was detected in Montgomery Ward well MW-I (1 3 ppb)sampled on 02-08-95 An additional compound, 1,2-D►chloropropane was detected in Montgomery Ward wells MW-1 (1 6 ppb)and MW-4(1 3 ppb) sampled on 06-21-95 Methylene chloride was also detected in wells MW-3 (4 8 ppb)and MW-4(2 4 ppb),respectively Methylene chloride is interpreted to be the result of laboratory contamination -L An additional compound, chloroform was detected in Montgomery Ward wells MW-1 (3 7 ppb),MW-5 (3 0 ppb), and MW-6 _ (1 3 ppb)sampled on 03-11-96An additional compound, 1,2-Dichloropropane(1 2 ppb)was detected in Montgomery Wardwell MW-I sampled on 06-19-96 Project No 1232 EAIVIRONMENTAL AUDIT, INC R