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TABLE 5 LABORATORY ANALYTICAL RESULTS 2012 ANNUAL GROUNDWATER MONITORING REPORT FORMER MARLEY COOLING TOWER SITE STOCKTON,CALIFORNIA Laboratory Analyses Screened Hexavalent Water-bearing Nitrate as N Calcium Chromium Chromium Manganese Well Zone Sample Date Event/Purpose (mg/L)' Sulfate(mg/L) (mg/L) Arsenic(ug/L) (Ng/L) (Ng/L)" Iron(lag/L) (Ng/L) TDS(mg/L) TOC(mg/L) Water Quality Objective 10 250 10 50 50 300 50 450 -- Injection Area Wells Continued MW-324(1-10) Intermediate 4/2/2008 Baseline/2nd Qtr 9.7 22.6 NA 8 21 20 178 <10 463 <1.0 5/20/2008 Supplemental 9.3 28.7 NA 7 14 <10 258 <10 481J <1.0 7/11/2008 3rd Qtr. 11.11 27.0 NA 8 15 <10 510 <10 483 <1.0 10/22/2008 4th Qtr. 9.6 28.4 NA 9 191 10 <100 <10 507J <1.0 10/22/2008 4th Qtr.(Dup) 9.5 28.9 NA 9 13 10 <100 <10 483J 1.6J 1/9/2009 1st Qtr. 10.1 40.2 NA <5 42 <10 <100 <10 644 <1.0 4/7/2009 2nd Qtr. 9.7 26.0 NA 8 14 <10 350 <10 467 <1.0 7/15/2009 3rd Qtr. NA 25.5 NA 8 14 10 554 <10 496 1.2 10/14/2009 4th Qtr. NA 28.8 NA <5 <10 <10 <50 <10 494 1.4 2/2/2010 1st Qtr. NA 25.9 NA 7 23 10 515 <10 553 0.4U 4/14/2010 2nd Qtr. NA 26.9 NA 6 14 10 294 <10 535 3.1 7/8/2010 3rd Qtr. NA 28.8 NA 7 22 10 465 <10 532 0.6J 10/13/2010 4th Qtr. NA 26.5 NA 8 17 <10 359 <10 587 0.5J 12/6/2010 4th Qtr NA 25.7 NA 8 14 10.4 336 <10 803 0.5J 1/21/2011 1st Qtr. NA 25.5 NA 8 12 10.6 326 <10 701 <1.0 4/14/2011 2nd Qtr. NA 26.3 NA 8J 16 10.5 239J <10 496 0.2J 4/14/2011 2nd Qtr.(Dup) NA 26.5 NA 6 15 10.5 136 <10 516 0.3J 5/23/2011 Supplemental NA NA NA NA 15 10 327 <10 NA <1.0 6/20/2011 Supplemental NA NA NA NA 15 10 213 <10 NA 1.3J 6/20/2011 Supplemental(Dup) NA NA NA NA 16 10 228 <10 NA <1.0 7/20/2011 3rd Qtr. NA 24.5 NA 7.0 13 10 368 <10 507.0 <1.0 8/22/2010 Supplemental NA NA NA NA 15 12.1 107 <10 NA 0.6J 10/13/2011 4th Qtr. NA 24.5 NA 6 12 12.4 274 <10 534.0 0.2J 1/25/2012 1st Qtr. NA 27.7 NA 2J 14 13.7 543 <10 503.0 0.91 4/25/2012 2nd Qtr. NA 24.7 NA 8 18 15.1 169 <10 674.0 0.91 MW-361 Deep 1/10/2008 Baseline <1 8.5 NA <5 <10 <10 88 90 144 <1.0 4/1/2008 2nd Qtr. <1 13.9 NA 7 <10 <10 63 70 176 <1.0 7/10/2008 3rd Qtr. <1 12.9 NA 6 <10 <10 195 50 1901 <1.0 10/21/2008 4th Qtr. <1 12.5 NA 6 <10 <10 <100 50 193 3.8 10/21/2008 4th Qtr.(Dup) <1 12.5 NA <5 <10 <10 <100 50 172 3.9 1/8/2009 1st Qtr. <1 16.2 J NA 5 <10 <10 <100 40 152 <1.0 4/7/2009 2nd Qtr. <1 11.1 NA 6 <10 <10 130 40 159 <1.0 7/14/2009 3rd Qtr. NA 8.6 NA <5 <10 <10 100 30 132 1.2 10/12/2009 4th Qtr. NA 7.8 NA 5 <10 <10 89 30 147 1.6 2/1/2010 1st Qtr. NA 4.7J NA 1 3 <10 116 50 81 2.9 4/13/2010 2nd Qtr. NA 6.1 NA 6 3 <10 37 30 144 1.9 7/7/2010 3rd Qtr. NA 7.8 NA 4J 3J <10 149 20 128 1.3 10/12/2010 4th Qtr. NA 9.0 NA 4J 4J <10 139 40 142 1.2 1/20/2011 1st Qtr. NA 8.7J NA 6 <10 <0.2 95 40 140 0.7J 4/13/2011 2nd Qtr. NA 8.9 NA 5 <10 <0.2 97 50 143 1.4 7/19/2011 3rd Qtr. NA 9.3 NA 5 <10 <10 98 40 138 <1.0 10/12/2011 4th Qtr. NA 10.4 NA 5 <10 <0.5 119 40 158 0.7J 1/24/2012 1st Qtr. NA 8.6 NA 5 <10 <0.5 110 40 126 1.2 1/24/2012 1stQtr.(Dup) NA 8.6 NA 5 <10 <0.5 105 40 140 1.2 4/25/2012 2nd Qtr. NA 8.4 NA 6 <10 <0.5 68 50 119 1.5 MW-363 Intermediate 10/12/2010 4th Qtr. NA 11.4 NA 15 51 <10 50 120 222 0.6J 1/20/2011 1st Qtr. NA 10.3J NA 14 3J 1.91 75 110 220 <1.0 MW-436(1-5) Intermediate 1/21/2011 1st Qtr. NA 23.2 NA 8 14 10.0 410 <10 675 <1.0 1/21/2011 1stQtr.(Dup) NA 23.1 NA 8 15 10.3 425 <10 711 <1.0 MW-447S Intermediate 8/9/2010 Baseline NA 53.1 NA <5 7,090 7,080 313 NA 543 1.0 8/16/2010 Baseline NA 33.6 NA 6 3,540 3,330 270 NA 387 1.5 8/23/2010 Baseline NA 48.7 NA 4J 7,990 7,780 397 NA 578 1.0 10/14/2010 4th Qtr. NA 57.2 NA 6 7,700 7,670 370 10 564 1.3 12/6/2010 4th Qtr. NA 44.0 NA 5 6,990 6,510 274 <10 542 0.6J 1/25/2011 1st Qtr. NA 40.7 NA 4J 6,650 5,740 234 70 670 1.1 4/18/2011 2nd Qtr. NA 42.4 NA 6 6,020 5,980 120 10 733 0AJ 5/23/2011 Supplemental NA NA NA NA 5,910 5,880 243 <10 NA <1.0 6/20/2011 Supplemental NA NA NA NA 5,130 5,200 247 <10 NA <1.0 7/21/2011 3rd Qtr. NA 41.2 NA 5 4,950 3,350 413 <10 520 <1.0 8/22/2011 Supplemental NA NA NA NA 815 753 71 6J NA 1.11 8/22/2011 Supplemental(Dup) NA NA NA NA 868 776 83 7J NA 1.3 10/17/2011 4th Qtr. NA 49.8 NA 4J 2,630 2,630 350 <10 627 0.6J 1/26/2012 1st Qtr. NA 65.4 NA 5 2,240 2,200 359 20 621 0.91 5/2/2012 2nd Qtr. NA 88.6 NA 6 2,160 1,990 388 10 813 0.5J (Page 12 of 19)