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TABLE 5 LABORATORY ANALYTICAL RESULTS 2013 SEMIANNUAL GROUNDWATER MONITORING REPORT FORMER MARLEY COOLING TOWER SITE STOCKTON,CALIFORNIA Page 18 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(pg/L) (pg/L) TDS(mg/L) TOC(mg/L Water Quality Objective 10 250 10 50 50 300 50 450 Injection Area Wells Continued MW-449S Intermediate 7/25/2012 3rd Qtr NA 60.7 NA 5 2,680 2,620 390 20 755 0.6J 10/25/2012 4th Qtr NA 59.5 NA 5 1,750 1,720 584 7J 819 1.1 1/30/2013 1st Qtr. NA 64.3 NA 5 1,770 1,740 547 10 780 0.6J 4/16/2013 2nd Qtr. NA 74.3 NA <5 1,940 1,930 366 10 762 1.2 MW-449D Intermediate 7/25/2012 3rd Qtr NA 39.3 NA 8 5,710 5,700 200 40 411 0AJ 10/29/2012 4th Qtr NA 35.9 NA 7 6,320 6,610 373 <10 449 0.7J 10/29/2012 4th Qtr(Dup) NA 36.9 NA 7 6,600 6,640 364 <10 470 0.7J 1/30/2013 1st Qtr. NA 37.9 NA 8 7,500 7,490 241 <10 403 0.81 4/12/2013 2nd Qtr. NA 44.3 NA 6 8,600 8,550 190 <10 462 <1.0 MW-450S Intermediate 7/19/2012 3rd Qtr NA 36.0 NA 6 4,040 3,870 170 30 453 0AJ 7/19/2012 3rd Qtr(Dup) NA 35.9 NA 6 3,980 3,880 188 30 441 0AJ 10/25/2012 4th Qtr NA 35.5 NA 6 4,400 4,360 294 <10 569 0.6J 1/30/2013 1st Qtr. NA 38.0 NA 7 4,800 4,700 262 <10 479 0AJ 4/16/2013 2nd Qtr. NA 44.6 NA 5 5,200 5,160 209 <10 497 <1.0 MW-450D Intermediate 7/19/2012 3rd Qtr NA 19.8 NA 9 100 87.8 97 10 281 0AJ 10/24/2012 4th Qtr NA 18.1 NA 11 85 85.0 138 <10 257 0.6J 1/29/2013 1st Qtr. NA 17.3 NA 9 100 16.6 140 <10 300 0.6J 4/12/2013 2nd Qtr. NA 22.0 NA 9 164 144.0 102 <10 293 0.7J Back round/Com Iiance Wells MW-7 Shallow 1/9/2008 Background 8.6 42.0 NA <5 <10 <10 287 <10 577 <1.0 4/1/2008 2nd Qtr./Compliance 8.6 44.6 NA <5 13 <10 273 <10 587 <1.0 7/10/2008 3rd Qtr./Compliance 11.8 38.6 NA <5 10 <10 1,000 10 612 <1.0 10/22/2008 4th Qtr./Compliance 1.9 66.7 NA <5 18 <10 <100 10 688J <1.0 1/9/2009 1st Qtr. 7.5 26.0 NA <5 53 <10 <100 10 681 <1.0 4/8/2009 2nd Qtr. 6.1 27J NA <5 14 20 479 <10 519 1.0 J 7/15/2009 3rd Qtr. NA 34.4 NA <5 <10 <10 663 20 587 1.4 10/12/2009 4th Qtr. NA 41.7 NA 3 14 <10 496 10 616 1.7 2/2/2010 1 st Qtr. NA 44.1 NA 2 14 <10 522 10 608 0.5 4/13/2010 2nd Qtr. NA 45.5 NA 2 7 <10 270 10 561 0.7U 7/8/2010 3rd Qtr. NA 48.1 NA 3J 13 <10 466 20 551 0.7J 10/13/2010 4th Qtr. NA 41.9 NA 4J 13 <10 486 91 603 0.7J 1/21/2011 1st Qtr. NA 43.0 NA 4J 91 3.03 436 10 642 <1.0 4/14/2011 2nd Qtr. NA 42.7 NA 3J 13 3.77 240 <10 648 0AJ 7/20/2011 3rd Qtr. NA 44.4 NA 3J 8J <10 558 <10 647 16.0 10/13/2011 4th Qtr. NA 42.7 NA 2J <10 0.88 339 20 696 0.3J 1/24/2012 1st Qtr. NA 41.5 NA 3J 6J 5.24 288 <10 595 0.91 4/25/2012 2nd Qtr. NA 43.0 NA 4J 8J 5.35 199 <10 620 1.0 7/24/2012 3rd Qtr NA 41.2 NA 3J 91 4.96 293 10 582 0.7J 10/23/2012 4th Qtr NA NA NA NA 6J NA NA NA NA NA 1/25/2013 1st Qtr. NA NA NA NA 91 NA NA NA NA NA MW-201 Shallow 2/4/2008 Background 14.3 49.4 NA <5 17 <10 390 <10 786 <1.0 4/2/2008 2nd Qtr./Compliance 12.5 47.0 NA <5 28 <10 307 <10 807 <1.0 5/20/2008 Supplemental 11.4 51.1 NA <5 <10 <10 493J <10 877J 3.8 5/20/2008 2nd Qtr./Supplemental(Dup) 11.1 49.9 NA <5 <10 <10 503 <10 850J <1.0 7/11/2008 3rd Qtr./Compliance 12.4 51.5 NA <5 13 <10 1,220 <10 956 <1.0 7/11/2008 3rd Qtr. 11.4 50.5 NA <5 13 <10 1,340 <10 893 <1.0 10/22/2008 4th Qtr./Compliance 6.3 44.7 NA <5 22 <10 <100 <10 832J 1.0J 1/9/2009 1st Qtr. 10.8 58.1 NA <5 63 <10 <100 <10 841 1.5 4/8/2009 2nd Qtr. 12.0 53.2 NA <5 19 10 637 <10 879 1.3 J 7/15/2009 3rd Qtr. NA 50.9 NA <5 21 <10 1,000 <10 851 1.2 10/14/2009 4th Qtr. NA 52.0 NA 1 7 <10 688 20 907 2.4 2/2/2010 1 st Qtr. NA 48.5 NA 2 31 <10 814 <10 899 0.6 4/14/2010 2nd Qtr. NA 49.4 NA 2 11 <10 515 10 950 0.6U 7/8/2010 3rd Qtr. NA 52.9 NA 3J 32 10 849 <10 871 1.6 10/13/2010 4th Qtr. NA 48.7 NA 2J 15 <10 926 10 886 1.3 1/21/2011 1st Qtr. NA 52.2 NA 4J 21 8.98 736 <10 920 <1.0 4/14/2011 2nd Qtr. NA 54.1 NA 3J 23 10.0 326 <10 944 0.7J 7/21/2011 3rd Qtr. NA 54.1 NA 2J 10 <10 656 <10 1,430 <1.0 10/13/2011 4th Qtr. NA 53.9 NA 2J 13 9.74 528 <10 940 0.5J 1/25/2012 1st Qtr. NA 44.6 NA 5 17 9.40 127 <10 975 1.2 4/30/2012 2nd Qtr. NA 48.8 NA 3J 14 10.70 357 <10 835 1.3 7/24/2012 3rd Qtr NA 46.4 NA 3J 18 8.48 445 <10 906 0.8J 10/24/2012 4th Qtr NA NA NA NA 14 NA NA NA NA NA 1/29/2013 1st Qtr. NA NA NA NA 3J NA NA NA NA NA 4/10/2013 2nd Qtr. NA NA NA NA 14 NA NA NA NA NA