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rl� 31313333Jt333i lttti � ■■� >_ � � � � r• � � r• � � � � TABLE 2 - CONTINUED Analytical Results of Ground Water Samples SIERRA LUMBER 3 75 West Hazelton Avenue, Stockton, Caldomia (uP/l) f Well Mound Screen Ethyl- M MTBE MTBE D Date Water Interval TPH-g Benzene Toluene Xylenes RIPE TAME ETBE TBA Depth (ft bsg) - benzene u 8020 8260 08-25-98 1742 110,000 7„500 25,000 3,500 20,000 ND<100 ND<90 ND<90 ND<90 ND<90 ND<450 MW4A 09-16-98 1783 8 to 33 140,000 15,000 39,000 4,600 25,000 ND<200 ND<200 ND<200 ND<200 ND<200 ND<1000 12-10-98 1860 81,000 3,000 16,000 3,100 17,000 ND<200 ND<130 ND<130 ND<130 ND<130- ND<650 03-15-99 1715 95,000 3,600 16,000 3,400 18,000 ND<1000 ND<65 ND<65 ND<65 ND<65 ND<330 08-25-98 1965 25,000 420 2,700 i 860 4,700 ND<200 ND<10 ND<10 ND<10 ND<10 ND<450 MW-413 09-16-98 1942 12,000 310 240 530 2,600 ND<20 ND<10 ND<10 ND<10 ND<10 ND<50 12-10-98 2006 45 to 50 2,400 110 15 140 120 ND<20 1 5 11 ND<1 ND<1 ND<5 03-15-99 18 50 3,100 38 4 2 88 31 ND<30 12 1 4 ND<l ND 08-25-98 16 17 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 ND<l ND<1 ND<1 ND<1 ND<5 09-16-98 1659 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 ND<l ND<1 ND<1 ND MW-5 12-10-98 17 16 [0 to 35 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 ND<l ND<1 ND<l ND 03-15-99 1598 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 ND<1 ND<1 ND<l ND 08-25-98 1789 1480 78 59 1 1 098 ND<5 ND<1 0 94 ND<l ND<l 94 09-16-98 1903 160 33 083 085 092 ND<5 ND<1 ND<1 ND MW-6 12-10-98 1943 IO to 35 200 ND<0 5 ND<0 5 16 ND<0 5 ND<5 ND<1 ND<1 ND 03-15-99 1791 120 1 ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 ND<l ND<l ND<1 ND 08-25-98 1803 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 ND<1 ND<l ND 09-16-98 1843 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 ND MW-7 12-10-98 1921 9 to 34 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 ND 03-15-99 1776 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 ND<l ND<l ND i Notes All units reported asµgl1(micrograms per Mer or parts per billion) TPH-g total petroleum hydrocarbons quantified as gasoline WE di-isopropyl ether,CTBE ethyl tertiary butyl ether,TAMC tertiary amyl methyl ether,TBA tertiary butanol alcohol,MTBE methyl ternary butyl ether ND not detected < indicates constituents were not detected at a concentration greater than the reporting limit shown Laboratory analysis up to 04/21/97 reported by John P Cummings&Associates in Quarterly Report,dated 21 November 1997 I Advanced GeoEnvrronmmma 1,Inc.