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SEQUOIA ANALYTICAL <br /> 819 Striker Avenue Suite 8 • Sacramento CA 95834 <br /> (916) 921-9600 • FAX (916) 921-0100 <br /> lie RESNA Industries Client Project ID x#38009 04/Fire Station #2, Stockton <br /> 3164 Gold Camp Or, Suite 200 Matrix Water <br /> Rancho Cordova, CA 95670 <br /> Attention .lay Johnson QC Sample Group 3050919-923 Reported Jun 8, 1993 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl <br /> Benzene Toluene benzene Xylenes Diesel <br /> Method EPA 602 EPA 602 EPA 602 EPA 602 EPA 8015 Mod <br /> Analyst M C M C M C M C M C <br /> Concentration 10 10 10 20 300 <br /> Spiked. ug/L ug/L ug/L ug/L mg/L <br /> LCS Batch# LCS052893 LCS052893 LCS052893 LCS052893 BLK060193MS <br /> Date Prepared 5/28/93 5/28/93 5/28/93 5/28/93 6/1/93 <br /> Date Analyzed' 5/28/93 5/28/93 5/28/93 5/28/93 6/1/93 <br /> Instrument I D #• HP-2 HP-2 HP-2 HP-2 HP-3B <br /> LCS % <br />� Recovery: 107 103 97 108 93 <br /> Control Limits. 80-120% 80-120% 80-120% 80-120% 75-125% <br /> MS/MSD <br /> Batch #' 3050919 3050919 3050919 3050919 BLK060193 <br /> Date Prepared- 5/28/93 5/28/93 5/28/93 5/28/93 6/1/93 <br /> Date Analyzed 5/28/93 5/28/93 5/28/93 5/28/93 6/1/93 <br /> Instrument l D.#' HP-2 HP 2 HP-2 HP-2 HP-3B <br /> Matrix Spike <br /> % Recovery 95 92 95 80 93 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery 100 100 100 90 100 <br /> Relative % <br /> Difference- 51 53 51 12 7 3 <br /> Please Note <br /> The LCS is a control sample of known interferent free matrix that is analyzed using the same reagents <br /> SEQUOIA 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 OC limits for MS/MSD s are advisory only <br /> reject batch results <br /> and are not used to accent or re <br /> i <br /> Wendy Amundsen <br /> Laboratory Director 3050919 RES <3> <br />