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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 -- Quality Control Samples Continued Equipment Rinsate (Continued) 1/8/2009 1st Qtr. <1 5.4 NA <5 <10 <10 <100 <10 708 1.5 1/9/2009 1st Qtr. <1 <1 NA <5 <10 <10 <100 <10 <10 <1.0 1/12/2009 1st Qtr. <1 <1 NA <5 <10 <10 <100 <10 <10 <1.0 4/7/2009 2nd Qtr. <1 <1 NA <5 <10 <10 <50 <10 20 <1.0 4/8/2009 2nd Qtr. <1 <1 NA <5 <10 <10 <50 <10 <10 <1.0 7/14/2009 3rd Qtr. NA <1 NA <5 <10 <10 <10 <10 10 1.7 7/15/2009 3rd Qtr. NA <1 NA 8 <10 <10 1,120 5,140 13 1.6 10/12/2009 4th Qtr. NA <1 NA <5 <10 <10 <50 <10 13 1.2 10/15/2009 4th Qtr. NA <1 NA <5 <10 <10 <50 <10 8 1.0 2/2/2010 1st Qtr. NA 0.5 NA <5 <10 <10 <50 <10 14 0.2 2/3/2010 1st Qtr. NA 0.5 NA <5 <10 <10 <50 <10 7 0.3 2/1/2010 1st Qtr. NA 2.4 NA <5 <10 <10 <50 <10 13 0.2 4/13/2010 2nd Qtr. NA <1 NA <5 <10 <10UJ <50 <10 22 0.4 4/14/2010 2nd Qtr. NA <1 NA <5 <10 <10 <50 <10 <10 0.2 4/15/2010 2nd Qtr. NA <1 NA <5 <10 <10 <50 <10 <10 0.5 7/7/2010 3rd Qtr. NA 0.45J NA <0.5 <10 <10 <50 <10 <10 0.5J 7/8/2010 3rd Qtr. NA <1 NA <0.5 <10 <10 <50 <10 10 0.2J 8/16/2010 3rd Qtr. NA 4.91 NA <0.5 <10 <10 <50 NA 11 1.0 8/23/2010 3rd Qtr. NA 0.65J NA <0.5 <10 <10 <50 NA 23 1.1 10/12/2010 4th Qtr. NA 0.3J NA <5 <10 <10 <50 <10 16 0.91 10/13/2010 4th Qtr. NA 1.3 NA <5 <10 <10 <50 <10 7J 1.5 10/14/2010 4th Qtr. NA 0.4J NA <5 <10 <10 <50 <10 <10 0.2J 12/6/2010 4th Qtr. NA 0.4J NA <5 <10 <10 <50 <10 <10 0.4J 12/8/2010 4th Qtr. (2" Pump) NA <1 NA <5 <10 <10 <50 <10 <10 0.3J 12/8/2010 4th Qtr. (4" Pump) NA <1 NA <5 <10 <10 <50 <10 <10 0.5J 1/20/2011 1st Qtr. NA 0.3J NA <5 <10 0.21JJ <50 <10 <10 0.07J 1/21/2011 1st Qtr. NA 1.4J NA <5 <10 0.2UJ <50 <10 6.OJ 0.3J 1/25/2011 1st Qtr. NA 0.3J NA <5 <10 <0.2 <50 <10 <10 0.2J 4/13/2011 2nd Qtr. NA <1 NA <5 <10 <0.2 <50 <10 5J 0.1J 4/14/2011 2nd Qtr. NA <1 NA <5 <10 <0.2 <50 <10 51 <1.0 4/18/2011 2nd Qtr. NA <1 NA <5 <10 <0.2 <50 <10 <10 <1.0 5/23/2011 Supplemental NA NA NA NA <10 <0.2 <50 <10 NA <1.0 6/20/2011 Supplemental NA NA NA NA <10 <0.2 <50 <10 NA 0.8J 7/19/2011 3rd Qtr. NA 0.3J NA <5 <10 <10 <50 <10 <5 0.3J 7/20/2011 3rd Qtr. NA <1 NA <5 <10 <10 <50 <10 8.OJ 0.91 7/21/2011 3rd Qtr. (4") NA <1 NA <5 <10 <10 <50 <10 8.OJ 0.3J 7/21/2011 3rd Qtr. (2") NA 0.3J NA <5 <10 <10 <50 <10 <10 0.2J 8/22/2011 Supplemental NA NA NA NA <10 <0.2 <50 <10 <10 1.0 10/12/2011 4th Qtr. NA 0.8J NA <5 <10 <0.5 <50 <10 <10 0.1J 10/13/2011 4th Qtr. NA 1.2 NA <5 <10 <0.5 <50 <10 <10 0.1J 10/17/2011 4th Qtr. NA <1 NA <5 <10 <0.5 <50 <10 <10 0.2J Field Blank 1/9/2008 Baseline <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 <1 <1 NA <5 <10 <10 <50 <10 12 <1.0 1/21/2008 Baseline <1 2.9 NA <5 <10 <10 <50 <10 <10 <1.0 2/4/2008 Background <1 4.5 NA <5 <10 <10 <50 <10 <10 <1.0 3/19/2008 Baseline <1 4.6 NA <5 <10 <10 <50 <10 12 <1.0 4/1/2008 Baseline/2nd Qtr <1 1.0 NA <5 <10 <10 <50 <10 <10 <1.0 4/2/2008 Baseline/2nd Qtr <1 1.3 NA <5 <10 <10 <50 <10 <10 <1.0 5/20/2008 Supplemental <1 5.3 NA <5 <10 <10 <50 <10 18 <1.0 7/10/2008 3rd Qtr. <1 <1 NA <5 <10 <10 <50 <10 25 <1.0 7/11/2008 3rd Qtr. 0.9 5.6 NA <5 <10 <10 <50 <10 18 <1.0 10/21/2008 4th Qtr. <1 <1 NA <5 <10 <10 <100 <10 24 7.1 10/22/2008 4th Qtr. <1 5.6 NA <5 <10 <10 <100 <10 <10UJ <1.0 (Page 18 of 19)