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4 <br /> SEQUOIA ANALYTICAL <br /> 819 Striker Avenue, Suite 8 • Sacramento, CA 95834 <br /> (916) 921-9600 • FAX (916) 921-0100 <br /> n ClienVt project od <br /> v.,w lA <br /> w ° �'� w` •`°`\°Vrk� <br /> 3 S St Matrix Air <br /> Sacramento, CA 95814 <br /> Attention Mindy Wright OC Sample Group 3100085-086 Reported Oct 7, 1993 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl <br /> Benzene Toluene benzene Xylenes <br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst: C`.hlaravallotl Mparavalloti Chlaravalloti Olaravallotl <br /> Concentration 20 20 20 60 <br /> Spiked: mg/cublc m mg/cubic m mg/cubic m mg/cubic m <br /> LCS Batch#: BLK100693 BLK100693 BLK100M BLK100693 <br /> Date Prepared: 10/6/93 10/6/93 10/6/93 10/6/93 <br /> Date Analyzed: 10/6/93 10/6/93 10/8/93 10/6/93 <br /> Instrument 1 D.#: HP-2 HP 2 HP-2 HP 2 <br /> LCS % <br /> Recovery: 100 95 95 93 <br /> Control Limits: 75.125 7-5.125 75-125 75-125 <br /> hi.rSriwr.r vr4 ry+C }n n 3m.}n.x ry ,�v. u r,Y Sv. i n+m . + ~•+ • , •xr,� yr v +r . x. i v vP^^�+C hM"N'Y'p}+'�r/3ywr+� w r� <br /> r } <br /> MS/MSD <br /> Batch#: BLK100693 BLK100693 BLK100693 BLK100693 <br /> Date Prepared: 10/6/93 10/6/93 10/6/93 10/8/93 <br /> Date Analyzed: 10/6/93 10/6/93 10/6/93 10/6/93 <br /> Instrument I D.#: HP-2 HP-2 HP-2 HP-2 <br /> Matrix Spike <br /> %Recovery: 100 95 95 93 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery. 105 100 100 102 <br /> Relative% <br /> Difference- 49 51 51 92 <br /> Please Note <br /> The LCS is a control sample of known,Interferent free matrix that is analyzed using the same reagents, <br /> S QUOIA ANALYTICAL preparation and analytical methods employed for the samples The LCS%recovery data Is used for <br /> validation of sample batch results Due to matrix effects,the QC limits for MS/MSD's are advisory only <br /> G/yL1G /� 9 and are not used to accept or reject batch results <br /> Unda C Schne der /�'<<�"�" <br /> Project Manager <br /> 3100065 BRS -c2> <br />