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Table 4 Analytical Data for Groundwater Well Samples TPH-g,BTEX,Fuel Oxygenates,and Fuel Additives Former Colombo/Toscana Bakery 1444 South Lincoln Street Stockton,California 95206 Monitoring TPH-g Benzene Toluene Ethylbenzene Xylenes MTBE DIPE ETBE TAME TBA 1,2-DBA 1,2-DCA Well Sampling Date (µg/L) (Rg/L) OWL) OWL) (Pg/L) (Pg/L) (Ag/L) (pg/]L) (µg/L) W/O (p1/L) (Pg/L) MW-1 2/7/1996 160,000 22,000 36,000 4,100 20,000 NA NA NA NA NA NA NA 1/16/2007 14,000 1,100 410 620 1,000 160 <2.5 <2.5 <2.5 41 <2.5 <2.5 1/16/2007-dup 14,000 1,000 420 610 1,000 170 <2.0 <2.0 <2.0 40 <2.0 <2.0 MW-7S 10/31/1997 100,000 19,000 17,000 2,200 8,000 120 <50 <50 <10 <50 NA NA 1/16/2007 32,000 12,000 260 150 260 41 <25 <25 <25 <150 <25 <25 MW-71) 10/31/1997 10,000 1,300 1,200 220 1,000 <50 <50 <50 <10 <50 NA NA 1/16/2007 480 120 1.8 4.8 9.9 <0.50 <0.50 <0.50 <0.50 9.3 <0.50 0.52 VE-I 1/16/2007 Not sampled due to free product Travel Blank 1/16/2007 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <0.50 <0.50 RWQCB ESLs 500 46 130 290 100 1,800 NE NE NE 18,000 150 200 Title 22 CCR MCLs NE 1 150 300 1,750 13 NE NE NE NE 0.05 0.5 Notes: µg/L.=Micrograms per liter. 1,2-DBA=1,2-dibromoethane(ethylene dibromide or EDB). TPH-g=Total petroleum hydrocarbons quantified as gasoline. 1,2-DCA=1,2-dichloroethanc(ethylene dichloride or EDC). MTBE=Methyl tertiary butyl ether. NA=Not analyzed. DIPE=Di-isopropyl ether. NE-None established. ETBE=Ethyl tertiary butyl ether. dup=Duplicate sample. TAME=Tertiary amyl methyl ether. TBA=Tertiary butyl alcohol. RWQCB ESLs-San Francisco Bay Regional Water Quality Control Board Environmental Screening Levels for groundwater that is not a current or potential source of drinking water(February 2005). Title 22 CCR MCLS-Title 22 California Code of Regulations Maximum Contaminant Levels(June 2004). Page 1 of 1