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TABLE 5 LABORATORY ANALYTICAL RESULTS 2011 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 (pg/L) (pg/L) (pg/L)** Iron (pg/L) (pg/L) TDS (mg/L) TOC (mg/L) Water Quality Objective 10 250 -- 10 50 50 300 50 450 Background/Compliance Wells Continued MW-211 Intermediate 1/21/2008 Background 6.4 29.6 NA <5 <10 <10 241 <10 398 <1.0 1/21/2008 Background(Dup) 7.0 28.8 NA <5 <10 <10 214 <10 384 <1.0 4/1/2008 2nd Qtr./Compliance 7.3 30.3 NA <5 <10 <10 138 <10 417 <1.0 7/10/2008 3rd Qtr./Compliance 6.3 31.6 NA <5 <10 <10 374 <10 438 <1.0 10/21/2008 4th Qtr./Compliance 6.8 31.5 NA <5 <10 <10 <100 <10 414 2.1 1/8/2009 1st Qtr. 7.7 38.0 NA 6 17 <10 <100 <10 422 <1.0 4/7/2009 2nd Qtr. 8.7 30.6 NA 5 <10 <10 277 <10 419 <1.0 7/14/2009 3rd Qtr. NA 31.7 NA <5 <10 <10 388 <10 441 1.7 10/12/2009 4th Qtr. NA 28.4 NA 4 8 <10 320 <10 461 1.3 2/1/2010 1st Qtr. NA 29.4 NA 4 16 <10 329 <10 462 0.4U 4/13/2010 2nd Qtr. NA 27.5 NA 5 13 <101JJ 185 <10 479 0.3U 7/7/2010 3rd Qtr. NA 29.6 NA 4J 11 <10 389 <10 446 0.5J 10/12/2010 4th Qtr. NA 32.5 NA 4J 10 <10 264 <10 431 0.8J 1/20/2011 1st Qtr. NA 29.9 NA 5 5J 1.78 210 <10 512 0.3J 4/13/2011 2nd Qtr. NA 29.7 NA 4J 5J 2.07 184 <10 419 1.2 7/19/2011 3rd Qtr. NA 30.2 NA 4J 4J <10 155 <10 389 <1.0 10/12/2011 4th Qtr. NA 20.4 NA 4J <10 0.61 129 6J 311 0.5J MW-325 Intermediate 1/21/2008 Background 5.0 17.3 NA 9 <10 <10 157 <10 330 <1.0 4/1/2008 2nd Qtr./Compliance 5.2 15.4 NA 9 <10 <10 140 <10 360 <1.0 7/10/2008 3rd Qtr./Compliance 5.5 16.3 NA 10 <10 <10 382 <10 394 <1.0 10/21/2008 4th Qtr./Compliance 12.7 31.4 NA 5 31 <10 <100 <10 638 3.1 1/12/2009 1st Qtr. 6.5 17.0 NA 10 15 <10 <100 <10 382 <1.0 4/7/2009 2nd Qtr. 6.4 17.8 NA 10 <10 <10 264 <10 403 <1.0 7/14/2009 3rd Qtr. NA 29.0 NA <5 <10 <10 528 <10 646 1.1 10/12/2009 4th Qtr. NA 28.1 NA 5 20 <10 498 <10 660 1.3 2/1/2010 1st Qtr. NA 30.0 NA 5 26 <10 623 <10 636 0.4U 4/13/2010 2nd Qtr. NA 22.4 NA 6 14 <10 319 <10 514 0.6 7/7/2010 3rd Qtr. NA 21.6 NA 6 12 <10 359 <10 492 0.3J 10/12/2010 4th Qtr. NA 23.9 NA 5 14 <10 350 <10 503 0.8J 1/20/2011 1st Qtr. NA 30.3 NA 5 12 6.13 476 <10 636 0.3J 4/13/2011 2nd Qtr. NA 15.9 NA 8 8J 3.55 240 <10 395 1.1 7/19/2011 3rd Qtr. NA 5.6 NA 19 <10 <10 42J 70 162 <1.0 10/12/2011 4th Qtr. NA 13.6 NA 4J <10 <0.5 171 20 315 1.5 Quality Control Samples Equipment Rinsate 1/9/2008 Basline <1 <1 NA <5 <10 <10 <50 <10 <10 <1.0 1/10/2008 Baseline <1 <1 NA <5 <10 <10 <50 <10 <10 <1.0 1/14/2008 Baseline 0.3 1.3 NA <5 <10 <10 <50 <10 18 <1.0 1/21/2008 Background <1 4.8 NA <5 <10 <10 <50 <10 <10 <1.0 2/4/2008 Background <1 3.4 NA <5 <10 <10 <50 <10 <10 <1.0 3/19/2008 Baseline <1 3.7 NA <5 <10 <10 <50 <10 25 <1.0 4/1/2008 Baseline/2nd Qtr <1 <1 NA <5 <10 <10 <50 <10 <10 <1.0 4/2/2008 Baseline/2nd Qtr <1 <1 NA <5 <10 <10 <50 <10 <10 <1.0 5/20/2008 Supplemental 0.4 6.3 NA <5 <10 <10 <50 <10 18 <1.0 7/10/2008 3rd Qtr. <1 <1 NA <5 <10 <10 <50 <10 45 <1.0 7/11/2008 3rd Qtr. <1 6.6 NA <5 <10 <10 <50 <10 33 <1.0 10/21/2008 4th Qtr. <1 <1 NA <5 <10 <10 <100 <10 <10 7.0 10/22/2008 4th Qtr. <1 5.3 NA <5 <10 <10 <100 <10 54J 1.0 (Page 17 of 19)