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SEQUOIA ANALYTICAL <br /> 819 Striker Avenue, Suite 8 • Sacramento, CA 95834 <br /> (916) 921-9600 py/y/FAX (916) 921-0100 y� <br /> " 0 0 .� + r � k21,1Vµf it i9C0%3IMM <br /> i�v i <br /> q$ggls nments t nsuffarlts ` ie ro ect fI� 9 etl,'1 d1 N F iorado,�on,0 Melody lane, Ste 160 Matrix Air <br /> Roseville, CA 95678 <br /> Attention Paul Graff QC Sample Group 401-0740 Reported Jan 26, 1994 <br /> ,.. o-n rrr, . ,. r fr,, „5^ p S ... ry rvy.$2.'H':rlfu�✓rr�ri%a�,G�'n;r,�`, .x <br /> QUALITY CONTROL DATA REPORT <br /> ANALYFE Ethyi- <br /> Benzene Toluene Benzene Xylenes <br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst: Chlaravallob Chiaravalloti Chiaravalloti Chiaravallob <br /> Concentration 20 20 20 60 <br /> Spiked. mg/cubic m mg/cubic m mg/cubic m mg/cubic m <br /> LCS Batch#: BLK012194 BLK012194 SLK012194 BLK012194 <br /> Date Prepared: 1/21/94 1/21/94 1/21/94 1/21/94 <br /> Date Analyzed: 1/21/94 1/21/94 1/21/94 1/21/94 <br /> Instrument I.D.#: HP-2 HP-2 HP-2 HP-2 <br /> I-CS % <br /> 0 Recovery 115 110 110 112 <br /> Controf Limits: 75-125 75-125 75-125 75-125 <br /> MS/MSD <br /> Batch#- BLK012194 13LK012194 BLK012194 BLK012194 <br /> Date Prepared: 1/21/94 1/21/94 1/21/94 1/21/94 <br /> Date Analyzed: 1/21/94 1/21/94 1/21/94 1/21/94 <br /> Instrument I.D.#- HP-2 HP-2 HP-2 HP-2 <br /> Matrix Spike <br /> %Recovery: 113 110 110 112 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery. 110 110 110 110 <br /> Relative% <br /> Difference: 44 00 00 18 <br /> SiEWOII[A1L'Y1 - _:" ease <br /> The LCS is a control sample of known,interferent free 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 /> /c GCS C� �G7-7Z,?Z/ validation of sample batch results Due to matrix effects,the OC limits for MS/MSUs are advisory only <br /> ride C Schneider and are not used to accept or reject batch results <br /> Project Manager <br /> 4010740.AEG <3> <br />