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TABLE 2 - CONTINUED - ' Analytical Results of Ground Water Samples 5 SIERRA LUMBER- 375 West Hazelton Avenue, Stockton, California Ground Screen Wel! Date Water Interval TPII-g Benzene Toluene Ethyl Xylenes MTBE MTBE DIPE TAME ETBE " TBAN I D De th ft bs benzene 8020 8260 u 08 25-98 16 17 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<5 ND<l ND<l ND<1 ND<l ND<5 09-16-98 1659 11 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<5 ND<l ND<1 ND<1 ND<1 ND<5 12-10-98 17 16 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<5 ND<l ND<l ND<1 ND<1 ND<5 MW-5 03-15 99 1598 10 to 35 ND<50 ND<0 5 ND<O 5 ND<O 5 ND<O 5 ND<5 ND<1 ND<l ND<1 ND<1 ND<5 06-22-99 1660 ND<50 14 74 19 95 ND<5 ND<1 ND<1 ND<1 ND<] ND<5 09-1099 1760 NIX50 ND<0 5 ND<O 5 ND<O 5 ND<O 5 ND<5 ND<l ND<1 ND<l ND<lND<5 r 04-28-00 1580 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<5 ND<1 ND<l ND<1 ND<] ND<5 08-25-98 1789 480 78 59 1 1 098 ND<5 ND<1 094 ND<1 ND<l 94 09-16-98 1903 160 33 083 085 092 ND<5 ND<1 ND<1 ND<] ND<] ND<5 12-10-98 1943 200 ND<O 5 ND<O 5 16 ND<O 5 ND<5 ND<1 ND<1 ND<1 ND<1 ND<5 03-15-99 1791 120 ND<0 5 ND<O 5 ND<O 5 ND<O 5 ND<5 ND<1 ND<1 ND<l ND<1 ND<5 06-22-99 1810 86' ND<O 5 25 ND<0 5 082 ND<5 ND<1 ND<1 ND<l ND<1 7 MW-6 09-10-99 1917 10 to 35 93' ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<5 ND<l ND<1 ND<1 ND<1 ND<5 04-28-00 1746 130' ND<0 5 29 ND<O 5 071 ND<5 ND<1 ND<1 ND<1 ND<1 20 08-03-00 1820 1I0 ND<0 5 2 l ND<0 5 N1<0 5 ND<5 ND<l ND<1 ND<1 ND<1 ND<5 01-18-01 19 43, 110 ND<O 5 2 7 ND<O 5 ND<O 5 ND<5 ND<l ND<1 ND<l ND<1 ND<5 04-23-01 1880 61' ND<O 5 J 13 ND<O 5 ND<O 5 ND<5 ND<l ND<1 ND<1 ND<1 ND<5 07-24-01 1956 a 74' ND<O 5 1 14 ND<O 5 ND<O 5 1 ND<5 ND<1 ND<1 ND<1 ND<l ND<5 08-25-98 1803 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<5 ND<1 NIX 1 ND<1 ND<1 ND<5 09-16-98 1843 - ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<5 ND<1 NIX1 ND<1 ND<1 ND<5 12-10-98 1921 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<5 ND<] ND<1 ND<1 ND<1 ND<5 MW-7 03-15-99 1776 9 to 34 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<5 ND<1 ND<1 ND<] ND<1 ND<5 r 06-22-99 1850 ND<50 065 2 ND<O 5 19 ND<5 ND<1 ND<1 ND<1 ND<1 ND<5 09-10-99 1943 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<5 ND<1 NIX1 ND<1 ND<1 ND<5 04-28-00 1763 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<5 ND<1 ND<l ND< ND<l 10 06-22-99 1750 110' 1 1 23 ND<O 5 4 ND<5 53 ND<l ND<l ND<1 67 09-10-99 1857 ND<50 ND<0 5 ND<O 5 ND<O 5 ND<O 5 ND<5 34 47 ND<1 ND<l ND<5 MW-8 04-28-00 1673 15 to 35 ND<50 ND<0 5 ND<O 5 ND<O 5 ND<O 5 ND<5 19 19 ND<1 ND<1 '8 2 01-18-01 1866 f ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<5 22 23 ND<] ND<1 ND<5 07-24-01 18 97 NIX50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<5 21 1 2 ND<1 ND<1 ND<5 EW-1 07-16-99 15 to 45 1 96,000 1 5,600 13 ODO 1 800 10,000 INIX10001 - I - I - Notes All units reported as ugll(micrograms per liter or parts per billion) TPH-g total petroleum hydrocarbons quantified as gasoline DIPE di-isopropyl ether,ETBE ethyl ternary 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, one to a few isolated peaks are significant,no recognizable patter < 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 w Advanced CeoEnvrronmental,!nc.