ARCHIVED REPORTS_MONITORING WELL INSTALLATION AND BIOSPARGE EVALUATION REPORT

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Table 4 Historical Analytical Data for Groundwater Well Samples Former Colombo/Toscana Bakery 1444 South Lincoln Street Stockton, California 95206 Concentration and Associated MCLs(pg/L) Monitoring Sampling TPH-g Benzene Toluene Ethylbenzene Xylenes MTBE DIPE ETBE TAME TBA 1,2-DCA 1,2-DBA Well Date NE (1) (150) (300) (1750) (13) NE NE NE NE (0.5) (0.05) MW-7S 1/15/2008 22,000 9,200 64 99 110 99 <20 <20 <20 <90 <20 <20 MW-7S 4/14/2008 23,000 12,000 130 140 180 120 <20 <20 <20 <90 <20 <20 MW-7S 7/15/2008 22,000 11,000 63 94 91 87 <20 <20 <20 <90 <20 <20 MW-7S 10/28/2008 21,000 9,200 58 99 98 85 <20 <20 <20 <90 <20 <20 MW-7S 1/27/2009 16,000 7,600 39 58 67 84 <15 <15 <15 <70 <15 <15 MW-7S 4/27/2009 22,000 9,400 48 66 67 57 <15 <15 <15 <70 <15 <15 MW-7S 7/22/2009 22,000 9,600 52 74 75 57 <15 <15 <15 <70 <15 <15 MW-7D 10/31/1997 10,000 1,300 1,200 220 1,000 <50 <50 <50 <10 <50 NA NA MW-7D 1/16/2007 480 120 1.8 4.8 9.9 <0.50 <0.50 <0.50 <0.50 9.3 0.52 <0.50 MW-7D 4/13/2007 810 370 12 12 28 4.4 <0.50 <0.50 <0.50 10 NA NA MW-7D 7/23/2007 2,000 710 18 25 54 6.7 <0.90 <0.90 <0.90 11 0.92 NA MW-7D 10/16/2007 2,700 1,200 23 35 77 9.1 <2.0 <2.0 <2.0 11 <2.0 <2.0 MW-71) 1/15/2008 1,200 440 7.4 14 32 3.7 <0.50 <0.50 <0.50 10 1.5 <0.50 MW-71) 4/14/2008 540 130 3.2 12 28 1.4 <0.50 <0.50 <0.50 10 1.2 <0.50 MW-71) 7/15/2008 930 290 4.1 14 26 2.6 <0.50 <0.50 <0.50 12 1.3 <0.50 MW-71) 10/28/2008 1,400 370 6.8 31 55 5.0 <0.50 <0.50 <0.50 12 1.4 <0.50 MW-71) 1/27/2009 1,400 540 7.7 39 61 5.4 <0.90 <0.90 <0.90 10 1.3 <0.90 MW-71) 4/27/2009 1,000 330 6.7 42 1 62 2.0 <0.80 <0.80 <0.80 11 1.2 <0.80 MW-71) 7/22/2009 600 180 2.7 13 18 2.2 <0.50 <0.50 <0.50 10 1.2 <0.50 VE-1 1/16/2007 Not sampled due to free product. VE-1 4/13/2007 Not sampled due to free product. S:\Shara&USP ara Lee\Prejects\Califwnia\Sto ton(1[44 Sowh Lincoln Street)TO09_08-MW Instalaton Report\Tables&Flgvres2009_07_03&MW Instalwon Data-Tables.xls Page 4 of 6