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TABLE 2 - CONTINUED Analytical Results of Ground Water Samples SIERRA LUMBER 375 West Hazelton Avenue, Stockton, California Ground Screen _ Well pate Water Interval TPH-g Benzene Toluene Ethyl Xylenes MTBE MTBE RIPE TAME ETBE TBA I D De th ft bs benzene 8020 8260 08-25-98 1617 ND<50 ND<0 5 ND<0 5 ND<O 5 ND<0 5 ND<5 ND<l ND<1 1 ND 09-16-98 1659 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<O 5 ND<5 ND<l ND<1 ND<l ND<l ND<5 12-1099 1716 ND<50 ND<O 5 ND<0 5 ND<0 5 ND<O 5 ND<5 ND<1 ND<l ND<l ND<1 ND<5 MW-5 03-15-99 1598 10 to 35 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 ND<1 ND<1 ND<1 ND<l ND<5 06-22 99 1660 ND<50 14 74 19 95 ND<5 ND<l ND<l ND<l ND<l ND<5 09-10-99 1760 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 ND<l ND<l ND<l ND<l ND<5 04-28-00 1580 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 ND<l ND<l ND<l ND 08-25-98 17 89 480 78 59 1 1 098 ND<5 ND<l 094 ND<l ND<1 94 09-16-98 1903 160 33 083 085 092 NIX5 ND<l ND<l ND<l ND<l ND<5 12-10-98 1943 200 ND<0 5 ND<0 5 16 ND<0 5 ND<5 ND<1 ND<1 ND<1 ND<1 ND<5 03-15-99 1791 120 ND<0 5 ND<0 5 ND<0 5 N1<0 5 ND<5 ND<l ND<l ND<l ND<1 ND<5 MW-6 06-22-99 18 ]0 10 to 35 863 ND<0 5 25 ND<0 5 082 ND<5 ND<1 ND<l NIX1 ND<l 7 09-10-99 19 17 93' ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 NE?<l ND<1 ND<1 ND<1 ND<5 04-28-00 1746 1303 ND<0 5 29 ND<0 5 071 ND<5 ND 08-03-00 1820 110 ND<0 5 21 ND<0 5 ND<0 5 ND<5 ND 01-18-01 1943 110 ND<0 5 27 ND<0 5 N1<0 5 ND<5 ND<1 ND<l ND<1 ND<l ND<5 04-23-01 1880 61' ND<O 5 13 ND<0 5 ND<0 5 ND<5 ND<1 ND 08-25-98 1803 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 1843 ND<50 ND<O 5 ND<O 5 ND<0 5 ND<0 5 ND<5 ND<l ND<1 ND<l ND<1 ND<5 12-10-98 1921 ND<50 ND<O 5 ND<0 5 ND<0 5 ND<0 5 ND<5 ND<l ND<1 ND<l ND<1 ND<5 MW-7 03-15-99 1776 9 to 34 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 ND<1 ND<1 ND<l ND<1 ND<5 06-22-99 1850 ND<50 065 2 ND<0 5 19 ND<5 ND<l ND<1 ND<1 ND<1 ND<5 09-10-99 1943 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 ND 04-28-00 1763 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<O 5 ND< ND<l ND<l ND< ND<1 10 06-22-99 1750 110` 11 233 ND<0 5 4 ND<5 53 ND<l ND<l ND<l 67 09-10 99 1$57 ND<50 ND<0 5 ND<0 5 NIXO 5 ND<0 5 ND<5 34 47 ND<1 ND<1 ND<5 MW 8 04-28-00 1673 15 to 35 ND<50 ND<0 5 ND<0 5ND<0 5 ND<0 5 ND<5 19 19 ND<l ND<l 82 01-18-01 1866 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<0 5 NIRS 22 23 ND<1 ND<l ND<5 EW-1 07-16-99 - 15 to 45 96,000 5,600 13 000 1,8o0 10 000 ND<1000 - - Notes All units reported asµg11(micrograms per liter or parts per billion) 'ITH-g total petroleum hydrocarbons quantified as gasoline DIPE di-isopropyl ether,ETBE ethyl tertiary butyl ether,TAME tertiary amyl methyl ether,TBA ternary butanol alcohol,MTBE methyl tertiary butyl ether ND not detected ' unmodified or weakly modified gasoline is significant,' heavier gasoline range compounds are significant 3 one to a few isolated peaks are significant,no recognizable pattern < indicates constituents were not detected at a concentration greater than the reporting limit shown Laboratory analysts up to 04/21/97 reported by John P Cummings&Associates in Quarterly Report,dated 21 November 1997 Advanced GeoEnvrronmental,Inc. r