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TABLE 4 Historical Groundwater Treatment System Influent and Effluent Water Analysis November 1993- Present (Results in micrograms per liter- ttg/L unless otherwise noted) Golden Grain Company Manteca Bean Facility 229 Moffat Boulevard, Manteca, California Sample Sample Ethyl- Total Total Organic ID Date TPH- Benzene Toluene benzene Xylenes Lead* Lead* EDB Inf 11/11/93 170 79 17 6 29 <005 <010 <0 02 02/17/94 130 27 7 5 15 <005 <010 <0 02 05/19/94 140 3 8 1 3 1 1 3 40 <005 <010 <0 02 08/18/94 68 15 32 31 94 <005 <010 <0 02 11/17/95 51 74 0 5 1 5 26 <005 <010 <0 02 02/16/95 22 4 1 <0 3 0 5 14 <005 <010 <0 02 05/18/95 <50 15 <0 3 1 1 6 4 <005 <010 <0 02 -07127/95 <100 6 6 <1 0 <1 0 <20 — -- — 68/04/95 <50 11 <0 3 0 8 1 2 — — -- 08/08/95 <50 9 9 0 9 12 52 -- — -- 08/17/95 80 7 6 <0 3 0 9 3 3 <005 <010 <0 02 11/16/95 <50 4 <0 5 07 , <2 <0 04 <0 2 <0 02 Eff 11/11/93 11 0 5 <3 <3 <5 007 <010 <0 02 02/17/94 <10 <0 3 <0 3 <0 3 <0 5 <005 <010 <0 02 05/19/94 <10 <0 3 <0 3 <0 3 <0 5 <005 <010 <0 02 08/18/94 <10 <0 3 <0 3 <0 3 <0 5 <005 <010 <0 02 11/17/95 <10 <0 3 <0 3 <0 3 <0 5 <005 <010 <0 02 02/16/95 <10 <0 3 <0 3 <0 3 <0 5 <005 <010 <0 02 05/18/95 <50 <0 3 <0 3 <0 3 <0 5 <005 <010 <0 02 -07127/95 <100 <0 5 <1 0 <1 0 <2 0 — -- 08/04/95 <50 <0 3 <0 3 <0 3 <0 5 — -- -- 08/08/95 <50 <0 3 <0 3 <0 3 -05 — -- — 08/17/95 <50 <0 3 <0 3 <0 3 <0 5 <005 <0101 <0 02 11/16/95 <50 <0 5 <0 5 <05 <2 <0 0409 <0 02 TPH-g = total petroleum hydrocarbons as gasoline * = total lead and organic lead results reported in milligrams per liter(mg1L) EDB = ethylene dibromide(1,2-dibromoethane) not analyzed AS = air stripper Inf = influent ** - groundwater treatment system modified from air stripper to liquid-phase carbon prior to 07/27/95 sampling Eff effluent (See laboratory report for method detection limits) PEJI ®GROUNDWATER D❑TECHNOLOGy