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i <br /> (a RA W H Data Validation Report <br /> To: Eric Rowney —SAC Date: June 8, 2012 <br /> From: Sarah Von Raesfeld —WCK Project: Marley Cooling Tower <br /> Report Ref: GeoAnalytical SDG#s Y2A2413, Job Number:1881740 <br /> Y2A2507, Y2A2604 File Reference: <br /> This data validation report has been prepared by MWH and summarizes the review of analytical data <br /> submitted by GeoAnalytical Laboratories of Turlock, California (GeoAnalytical) for samples collected <br /> between January 24, 2012 and January 26, 2012 at the above referenced site. A list of respective sample <br /> identifications is included in Table A. Forty-seven (47) primary field samples, six (6) field duplicates, and <br /> six (6) field quality control (QC) samples were submitted. The following samples were submitted as field <br /> duplicate pairs: <br /> Duplicate Sample <br /> MW-361 Dup MW-361 <br /> TW-16 Dup TW-16 <br /> MW-322 Dup. MW-322 <br /> MW-323 Dup. MW-323 <br /> 1-11 Dup 1-11 <br /> MW-447D Dup MW-447D <br /> Samples were analyzed by one or more of the following methods: <br /> • Hexavalent chromium by United States Environmental Protection Agency(USEPA) Method SW7199 <br /> • Dissolved arsenic, chromium, copper, iron, and manganese by USEPA Method SW6020 <br /> • Sulfate by USEPA Method 300.0 <br /> • Total dissolved solids (TDS) by Standard Method SM2540C <br /> • Total organic carbon (TOC) by Standard Method SM5310C <br /> Results were reviewed in accordance with the appropriate methods listed above. In addition, the USEPA <br /> Contract Laboratory Program National Functional Guidelines for Inorganic Data Review (USEPA 2004) <br /> were used to provide overall guidance for the validation process. The data review included an evaluation <br /> of the following QC parameters based on standard performance criteria presented in these documents: <br /> • Analytical Holding Times/Sample Preservation <br /> • Method Blanks, Equipment Rinse Blanks, and Field Blanks <br /> • Laboratory Control Sample/ Laboratory Control Sample Duplicate (LCS/LCSD) Performance <br /> • Matrix Spike/Matrix Spike Duplicate (MS/MSD) Sample Performance <br /> • Field Duplicate Comparison <br /> • Detection Limits <br /> Page 1 of 5 <br />