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ENVIRONMENTAL Analytical Chemists May 7, 2010 Lab ID : STK1033689 SRI/Surgical Express Customer : 3-13822 Quality Control - Inorganic Constituent Method Date/ID Type Units Cone, QC Data DQo Note Wet Chem Oil and Grease 1664 05/06/2010:204498 Blank mg/L ND <3 LCS mg/L 40.40 66.0% 63-121 BS mg/L 40.40 66.5% 63-121 BSD mg/L 40.40 68.8% 63-121 BSRPD mgfL 40.40 3.5% <48.9 Solids,Total Dissolved 2540 G 05/04/2010:204406 Blank mg/L 9.4 20 LCS mg/L 995.0 101% 90-110 LCS mg/L 995.0 101 % 90-110 (STK1033715-003) Dup m 1.8% 10.0 Solids,Suspended 2540D 05/04/2010:310657 Blank mg/L ND <1 LCS mg/L 500.0 98.6% 38-138 LCS mg/L 500.0 94,7% 38-138 (STKI033654-001) Dup mg/L 3.2% 28.7 OD 5210B 04/30/2010:300308 RgBlk mg/L 0.07 2 RgBlk mg/L 0.20 2 b LCS mg/L 198.0 90.9% 60-120 LCS mg/L 198.0 95.5% 60-120 (STK1033690-001) Dup mg/L 1.9% 15.9 (STK1033690-001) Dup mg/L 8.2% 15.9 (STK1033690-001) Dup m 25.6% 15.9 440 5210B 05/05/2010:300368 CCV mg/L 1 1.000 99.0% 7120 Definition CCV Continuing Calibration Verification-Analyzed to verify the instrument calibration is within criteria. Blank Method Blank-Prepared to verify that the preparation process is not contributing contamination to the samples. RgBlk Method Reagent Blank-Prepared to correct for any reagent contributions to sample result. LCS Laboratory Control Standard/Sample-Prepared to verify that the preparation process is not affecting analyte recovery. BS Blank Spikes-A blank is spiked with a known amount of analyte.It is prepared to verify that the preparation process is not affecting analyte recovery. BSD :Blank Spike Duplicate of BS/BSD pair-A blank duplicate is spiked with a known amount of analyte.It is prepared to verify that the preparation process is not affecting analyte recovery. Dup :Duplicate Sample-A random sample with each batch is prepared and analyzed in duplicate.The relative percent difference is an indication of precision for the preparation and analysis. BSRPD :BS/BSD Relative Percent Difference(RPD)-The BS relative percent difference is an indication of precision for the preparation and analysis. ND Non-detect-Result was below the DQO listed for the analyte. DOD Data Quality Objective-This is the criteria against which the quality control data is compared. Explanation 440 Sample nonhornogeneity may be affecting this analyte.Data was accepted based on the LCS or CCV recovery. Page 5 of 5 Corporate Offices S Laboratory Office&Laboratory Office&Laboratory Field Office 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue Visalia,Califomia Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 TEL:559/734-9473 TEL:805/392-2000 TEL:209/942-0182 TEL:530/343-5818 Mobile:559/737-2399 FAX:805/525-4172 FAX:209/942-0423 FAX:530/343-3807 FAX:5591734-8435 CA NELAP Certification No.01110CA CA ELAP Certification No. 1563 CA ELAP Certification No.2670