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TABLE 5 LABORATORY ANALYTICAL RESULTS 2013 SEMIANNUAL GROUNDWATER MONITORING REPORT FORMER MARLEY COOLING TOWER SITE STOCKTON,CALIFORNIA Page 2 of 25 Laboratory Analyses Screened Hexavalent Water-bearing Nitrate as N Calcium Chromium Chromium Manganese Well Zone Sample Date Event/Purpose m /L* Sulfate (mg/L (mg/L Arsenic N /L) (pg/L) N /L** Iron(gg/L) (Ng/L) TDS(mg/L) TOC(mg/L Water Quality Objective 10 250 10 50 50 300 50 450 In'ection Area Wells Continued MW-101 Shallow 1/14/2008 Baseline 11.29J 50.2J NA <5 8501 800 275J 10 564 1.2 1/14/2008 Baseline(Dup) 11.1 50.6 NA <5 860 800 258 10 574 1.2 4/2/2008 2nd Qtr. 5.4 80.8 NA 7 1,400 1,400 240 40 615 <1 7/11/2008 3rd Qtr. 7.5 84.7 NA 7 1,200 1,200 730 210 612 <1 10/22/2008 4th Qtr. 6.6 78.4 NA 8 666 700 <100 580 754J 2.8J 1/12/2009 1st Qtr. <1 85.3 NA 8 50 <10 <100 990 638 1.7 4/7/2009 2nd Qtr. <1 57.7 NA 7 <10 <10 497 610 608 1.8 J 7/14/2009 3rd Qtr. NA 45.4 NA 5 <10 <10 609 550 612 1.9 10/12/2009 4th Qtr. <1 53.1 NA 6 10 <10 894 670 640 2.2 2/2/2010 1 st Qtr. NA 49.5 NA 5 29 <10 909 690 656 1.3 4/13/2010 2nd Qtr. NA 32.8 NA 2 18 <10 615 850 678 <1 7/8/2010 3rd Qtr. NA 103 NA 10 23 20 1,510 3,130 935 1.2 10/13/2010 4th Qtr. NA 55.7 NA 11 13 <10 772 870 649 0.91 1/21/2011 1st Qtr. NA 113 NA 11 10 <0.2 550 160 752 1.01 4/14/2011 2nd Qtr. NA 63.6 NA 8 7J <0.2 624 490 313 2.4 7/20/2011 3rd Qtr. NA 149 NA 7 4J <10 1,100 760 636 1.8J 10/13/2011 4th Qtr. NA 91.7 NA 6 3J <0.5 299 570 727 2.8 10/13/2011 4th Qtr.(Dup) NA 93.1 NA 5 3J <0.5 285 270 732 2.7 1/26/2012 1 st Qtr. NA 13.6 NA 2J 10 4.52 53 50 81 3.7 4/24/2012 2nd Qtr. NA 14.1 NA 4J 5J <0.5 154 70 107 1.0 7/24/2012 3rd Qtr NA 93.4 NA 5 3J <0.5 587 570 452 3.6 10/23/2012 4th Qtr NA 81.8 NA 7 4J <0.5 250 720 567 2.9 1/25/2013 1 st Qtr. NA 32.0 NA 5 <10 <0.5 117 160 306 1.8 MW-102 Shallow 1/10/2008 Baseline 12.7 54.9 NA <5 1,000 1,000 326J 50 696 2.0 4/2/2008 2nd Qtr. 13.3 53.4 NA <5 815 810 299 80 698 <1.0 7/11/2008 3rd Qtr. 18.8 106 NA <5 240 230 1,220 210 924 <1.0 10/22/2008 4th Qtr. 4.2 87.0 NA <5 83 100 <100 680 717J 2.3J 1/9/2009 1st Qtr. 4.9 89.3 NA 5 155 100 <100 940 845 1.0 4/8/2009 2nd Qtr. 6.4 75.5 NA <5 212 230 611 1,210 814 2J 7/15/2009 3rd Qtr. NA 104 NA <5 803 660 959 220 862 1.9 10/15/2009 4th Qtr. NA 79.3 NA 4 168 180 663 230 828 1.7 2/3/2010 1 st Qtr. NA 91.2 NA 2 132 110 892 760 891 1.0 4/15/2010 2nd Qtr. NA 89.2 NA 3 106 100 533 840 731 0.8u 7/8/2010 3rd Qtr. NA 79.3 NA 3J 750 670 580 640 748 0.6J 10/14/2010 4th Qtr. NA 88.7 NA 4J 1,200 980 962 770 884 1.2 1/25/2011 1st Qtr. NA 77.8 NA 3J 1,180 1,080 480 870 1,080 <1.0 4/18/2011 2nd Qtr. NA 88.3 NA 4J 1,080 1,030 212 780 870 0.51 8/22/2011 Supplemental NA 85.1 NA 2J 1,050 988 314 760 894 1.6 8/22/2011 Supplemental(Dup) NA 84.8 NA 3J 1,060 978 334 750 896 1.6 10/17/2011 4th Qtr. NA 82.7 NA 3J 825 825 463 620 926 0.7J 1/26/2012 1st Qtr. NA 80.7 NA 3J 620 608 396 650 901 1.1 4/30/2012 2nd Qtr. NA 77.0 NA 4J 615 600 340 670 900 1.5 7/25/2012 3rd Qtr. NA 76.3 NA 4J 503 503 444 580 856 0.6J 10/25/2012 4th Qtr NA 81.0 NA 4J 570 568 535 270 875 1.0 1/30/2013 1st Qtr. NA 80.2 NA 3J 735 731 670 600 967 0.7J 1/30/2013 1st Qtr.(Dup) NA 79.8 NA 4J 750 747 707 600 989 0.7J