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• TABLE 4 Historical Groundwater Treatment System Influent and Effluent Water Analysis November 1993 - Present (Results In micrograms per liter -fag/L unless otherwise noted) Golden Grain Company Manteca Bean Facility 229 Moffat Boulevard, Manteca, California Sample Sample Ethyl- Total Total Organic ID Date TPH-g Benzene Toluene benzene Xylenes Lead* Lead* EDS 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 3 4 0 < 005 <010 <0 02 08/18/94 68 15 3 2 31 9 4 < 005 < 010 <0 02 11/17/94 51 74 05 15 26 < 005 < 010 <002 02/16/95 22 4 1 <03 05 1 4 < 005 < 010 <0 02 05/18/95 <50 15 <03 1 6 4 < 005 < 010 <0 02 07/27/95 <100 6 6 <1 0 <1 0 <20 - 08/04/95 <50 11 <03 08 1 2 — — 08/08/95 <50 9 9 09 12 5 2 — -- 08/17/95 80 7 6 <03 09 33 < 005 < 010 <0 02 Eff 11/11/93 11 0 5 < 3 < 3 < 5 007 < 010 <0 02 . 02/17/94 <10 <03 <03 <03 <05 < 005 < 010 <0 02 05/19/94 <10 <03 <03 <03 <05 < 005 < 010 <0 02 08/18/94 <10 <03 <03 <03 <05 < 005 < 010 <002 11/17/94 <10 <03 <03 <03 <05 < 005 < 010 <002 02/16/95 <10 <03 <03 <03 <05 < 005 < 010 <0 02 05/18/95 <50 <03 <03 <03 <05 < 005 < 010 <0 02 07/27/95 <100 <05 <10 <10 <20 — — -- 08/04/95 <50 <03 <03 <03 <05 -- — 08/08/95 <50 <03 <03 <03 <05 - — -- 08/17/95 <50 <03 <03 <03 <05 < 005 < 010 <002 TPH-g = total petroleum hydrocarbons as gasoline * = total lead and organic lead results reported in milligrams per liter (mg/L) EDB = ethylene dibromide (1,2-dibromoethane) -- = not analyzed AS = air stripper Int = 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) i I • 42020102 QTR CWLMWATM ❑❑❑ nXHNOLWY