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1420 801h St. SW., Suite A <br /> Everett, WA 98203 <br /> CONES'TOGA-ROVERS Telephone: (425) 212-5100 Fax-. (425) 212-5199 <br /> & ASSOCIATES www.CRAworld.com <br /> MEMORANDUM <br /> To: James Eisert REF.No.: 058324-2480 <br /> Fizom: Jeffrey Cloud/bjw/44-NF \P__ DATE: May 14, 2010 <br /> C.C.: Melissa Straten,Jesse Orth,Julie Lidstone E-Mail and Hard C 9PYif Requested <br /> A- <br /> RE: Data Quality Assessment and Validation of Report J26649 <br /> Biotreatment Bed Soil Sampling <br /> Maintenance Facility <br /> Tracy, CA <br /> March 2010 <br /> INTRODUCTION <br /> The following details a quality assessment and validation of the analytical data resulting from the March <br /> 2010,collection of soil samples in Tracy,CA. Samples were submitted to Test America Laboratories (TA), in <br /> Pleasanton, CA, and analyzed for the following: <br /> Parameter Methodology <br /> Diesel Range Organics (DRO) SW846 8015B <br /> The analytical results are summarized in Table 1. The QC criteria used to assess the data were established <br /> by the methods and with the following guidance documents: <br /> 1) "USEPA Contract Laboratory Program National Functional Guidelines for Organic Data Review", <br /> USEPA 540/R-99/008, October 1999 <br /> ii) "USEPA Contract Laboratory Program National Functional Guidelines for Inorganic Review", <br /> USEPA 540/R-94/013, February 1994 <br /> These guidelines are collectively referred to as "Guidelines" in this memorandum. <br /> SAMPLE QUANTITATION <br /> The laboratory did not report any detected concentrations below the laboratory's practical quantitation limit <br /> (PQL)/report limit (RL). <br /> I QUAL FM PLOYMFN I 01TOR I UN I I Y FNIPLOYFR <br />