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Aa r. 16. 2009 2: 28 PM No. 3775 P. 7 -g, <br />ENVIRON TAL <br />Analytical Chemists <br />March 3, 2009 Lab ED : STK0931537 <br />Forward Inc. Customer :3-8692 <br />Quality Control - Inorganic <br />Constituent Method DateM Type units Conc. QC Data DQO Note <br />Wet Chem <br />Oil and Grease 1664 02/202009:201872 Blank IRA ND <3 <br />LCS mg/L 40.40 98.0% 63-121 <br />LCs mg/L 40-40 95.3% 63-121 <br />BS mg/L 40.40 90.1' 63-121 <br />BSD mg/L 40.40 85.9% 63-121 <br />BSRPD I mg& 1 40.40 4.7% 1 X48.9 <br />DeHnitlon <br />Blank : Method Blank - Prepared to yerify that the preparation process is not coninbuting contamination to the samples. <br />LCS : Laboratory Control Standard/Sample, -prep" to verify that the preparadoa process is not affecting analyte recovery. <br />13S : Blank Spikes - A blank is spiked with a ]mown amount of analyte. It is prepared to verify that the preparation process is not <br />affecting analyte recovery - <br />BSD : Blank Spice Duplicate of BSBSD pair - A blank duplicate is spiked with a known amount of analyte. It is prepared to verify that <br />the preparation process is not affecting analyte recovery. <br />BSRPD : BS/BSD Relative Percent Difference (RPD) - The BS relative percent difference is an indication of precision for the preparation <br />and analysis. <br />ND : Non -detect - Result was below the DQO listed for the analyte. <br />DQO : Data Quality Objective -'This is the criteria against which the quality control data is compared. <br />Page 5 of 6 <br />Corporate Offices & Laboratory <br />Of** & Laboratory <br />Office & Laboratory <br />Field Office <br />083 Corporation Street <br />2500 Stagecoach Road <br />663 E. LtndaAvonuo <br />Vi&alia, California <br />Santa Paves, CA 93060 <br />Slocklon, CA 95215 <br />Chloo, CA 95926 <br />TEL: 5581734-0473 <br />TEL: 8051392-2000 <br />TEL: 209!942-0182 <br />TF -L: 530/343-5810 <br />Moblie: SSW737-2399 <br />rAX: 005/525.4172 <br />FAX: 209/942-0423 <br />FAX 530/343-38D7 <br />pAX: SS9934-8435 <br />CA NELAP Certification ND. 01110CA <br />CA EtAP Ceatncation No. 1503 <br />CA ELAP Certilicalion No. 2670 <br />