Laserfiche WebLink
Sequoia 680 Chesapeake Drive Redwood City. CA 94064 (4t5) 364-9600 FAX (415) 364-9233 <br /> 1 404 N Wigel l.ane Walnut Creek. Cal 94599 {530) 988-9600 1 A (SWI 988 9673 <br /> loco Analytical 819 5trikcr Avenue,Suite 8 Sacrarncnto. CA 95834 (916) 9)1-7600 FAX 191h) 921.0100 <br /> 40acific Environmental Group Client Project ID: 920-078.1A/Chevron 9-0557, Stockton, CA <br /> 11315 Sunrise Gold Circle, Ste. M Matrix: Soil <br /> Rancho Cordova, CA 95742 <br /> Attention: Roger Hoffrrtc)re QC Sample Group 7100324-0338, 0341, 0344 Reportcd: Oct 24, 1997;' <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene X lenes <br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst: C. Lee C. Lee C. Lee C.Lee <br /> Concentration <br /> Spiked: 0 20 mg/kg 0.20 mg/kg 0.20 mg/kg 0.60 mg/kg <br /> LCS Batch#: LCS102097 LCS102097 LCS102097 LCS102097 <br /> Date Prepared: 10/20/97 10/20/97 10/20/97 10/20/97 <br /> Date Analyzed: 10/20/97 10/20/97 10/20/97 10/20/97 <br /> Instrument I.D.#: GCHP-1 GCHP-1 GCHP-1 GCHP-1 <br /> LCS <br /> Recovery: 114 105 107 106 <br /> Control Limits: 70-130 70-130 70-130 70.130 <br /> MS/MSD <br /> Batch #: 7100341 7100341 7100341 7100341 <br /> Date Prepared: 10/20/97 10/20/97 10/20/97 10/20/97 <br /> Date Analyzed: 10/20/97 10/20/97 10/20/97 10/20/97 <br /> Instrument I.D.#: GCHP-1 GCHP-1 GCHP-1 GCHP-1 <br /> Matrix Spike <br /> % Recovery: 106 98 100 99 <br /> Matrix Spike <br /> Duplicate <br /> Recovery: 112 102 104 102 <br /> Relative % <br /> Difference: 5.5 4.0 3.9 3.0 <br /> SEQUOIA ANALYTICAL Please Note: <br /> The LCS is a control sample of known,interferent tree matrix that is analyzed using the same reagents, <br /> preparation and analytical methods employed for the samples. The LCS%recovery data is used for <br /> G validation of sample batch results. Due to matrix effects,the OC limits for MS/MSD's are advisory only <br /> nda C. Schnei er and are not used to accept or reject batch results. <br /> roject Manager/Sacramento Labora ary <br /> 7100324.PES <8> <br />