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i <br /> (a RA W H Data Validation Report <br /> To: Eric Rowney —SAC Date: August 15, 2012 <br /> From: Sarah Von Raesfeld —WCK Project: Marley Cooling Tower <br /> Report Ref: GeoAnalytical SDG#s Y2G1811, Job Number:1881740 <br /> Y2G1909, Y2G2310, Y2G2410, File Reference: <br /> Y2G2513 <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 July 18, 2012 and July 25, 2012 at the above referenced site. A list of respective sample <br /> identifications is included in Table A. Fifty-five (55) primary field samples, eight (8) field duplicates, and <br /> ten (10)field quality control (QC) samples were submitted. The following samples were submitted as field <br /> duplicate pairs: <br /> Duplicate Sample <br /> MW-448D Dup MW-448D <br /> MW-320 Dup MW-320 <br /> MW-450S Dup MW-450S <br /> MW-214 (1-8) Dup MW-214 (1-8) <br /> MW-104 (S-2) Duplicate MW-104 (S-2) <br /> TW-13 (Duplicate) TW-13 <br /> MW-324 Duplicate MW-324 <br /> MW-4 (Dup) MW-4 <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 2010) <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 /> Page 1 of 6 <br />