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J December 30,2015 Lab ID : STK1553148 San Joaquin Regional Rail Commission Customer : 3-17703 Quality Control-Organic Constituent Method Date/ID Type Units Cone. QC Data DQO Note Organic Phenanthrene 625 12/23/15:218835SBL CCV mg/L 10.00 102% 80-120 Phenol 625 12/09/15:214306JOM/SL Blank ug/L ND <1 LCS ug/L 20.00 43.2% 23-104 BS ug/L 20.00 42.7% 23-104 BSD ug/L 20.00 48.7% 23-104 BSRPD u 20.00 13.1% 547 625 12/23/15:218634SBL CCV mg/L 10.00 103% 80-120 625 12/23/15:218835SBL CCV m 10.00 108% 80-120 henol-d6 625 12/09/15:214306JOM/SL Blank ug/L 20.00 89.8% 7-77 LCS ug/L 20.00 79.9% 7-77 310 BS ug/L 20.00 77.8% 7-77 436 BSD ug/L 20.00 89.5% 7-77 436 BSRPD u 20.00 14.1% 550 625 12/23/15:218634SBL CCV m L 20.00 104% 80-120 625 12/23/15:218835SBL CCV m 20.00 115% 80-120 Terphenyl-dl4 625 12/09/15:214306JOM/SL Blank ug/L 10.00 86.6% 37-100 LCS ug/L 10.00 90.4% 37-100 BS ug/L 10.00 89.0% 37-100 BSD ug/L 10.00 85.1% 37-100 BSRPD u L 20.00 4.5% <_18 625 12/23/15:218634SBL CCV mgfL 10.00 86.6% 80-120 625 12123/15:218835SBL CCV m 10.00 84.0% 80-120 Pyrene 625 12/09/15:214306JOWSL Blank ug/L ND <1 LCS ug/L 20.00 50.8% 44-106 BS ug/L 20.00 52.1% 44-106 BSD ug/L 20.00 49.6% 44-106 BSRPD u 20.00 4.9% :518 625 12/23/15:218634SBL CCV m L 10.00 88.8% 80-120 625 12/23/15:218835SBL CCV m L 10.00 87.1% 80-120 Pyridine 625 12/09/15:214306JOM/SL Blank ug/L ND <10 LCS ug/L 20.00 23.6% 0-52 BS ug/L 20.00 24.8% 0-52 BSD ug/L 20.00 24.9% 0-52 BSRPD ug/L 20.00 0.037 510 625 12/23/15:218634SBL I CCV m L 10.00 108% 80-120 625 1 12/23/15:218835SBL I CCV m 10.00 107% 80-120 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. LCS :Laboratory Control Standard/Sample-Prepared to verify that the preparation process is not affecting analyte recovery. MS Matrix Spikes-A random sample is spiked with a known amount of analyte.The recoveries are an indication of how that sample matrix affects analyte recovery. MSD :Matrix Spike Duplicate of MS/MSD pair-A random sample duplicate is spiked with a known amount of analyted.The recoveries are an indication of how that sample matrix affects 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 BSBSD 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. MSRPD :MS/MSD Relative Percent Difference(RPD)-The MS 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 ofprecision for the preparation and analysis. ND :Non-detect-Result was below the DQO listed for the analyte. DQO ;Data Quality Objective-This is the criteria against which the quality control data is com arcd. . Page 29 of 30