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Sequoia 680 Chesapeake Dnve Redwood Cty CA 94063 (415) 364-9640 FAX(415) 364 9233 <br /> 1900 Bates Avenue Suite L Concord CA 94520 (510) 686-9600 FAX(510)686%89 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br />•4'aifi��2v.�a`�°'aP`xL.'.,Y''•s.. :x',f.Y+".v:N.@✓,6.',iY .,rfi"t3N;}onc�R4a`C„a c,,.r,n �..a$n r` n tr? s k? tom' °' • �, •,sh..:�n.v:i.'.c:v�,i� ,.hr^ s > <br /> i ugro'West, Inc Cleent Project ID Shell, 141 N F-I Oorado, Stockton, CA <br /> 1050 Melody Lane, Ste 160 Matra Water/Air <br /> Roseville, CA 95678 <br /> Attention Sudhakar Talanki QC Sample Goup 5040530-533 Reported Apr 26, 1995 <br /> (QUALITY CONTROL DATA REPORT <br /> ANALYTE 14-Dichlcro- N-Nttroso-Di- 12,4-Trlchloro- 4-Chloro-3- <br /> Phenol 2-Chlaro henol benzene N-propyiamine benzene Methylphenyl <br /> Method: EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 <br /> Analyst: S Le S Le S Le S Le S Le S Le <br /> Concentration <br /> Spiked: 200 ug/L 200 ug/L 100 ug/L 100 ug/L 100 ug/L 200 ug/L <br /> LCS Batch#' LCSO41795 LCSO41795 LCSO41795 LCSO41795 LCSO41795 LCSO41795 <br /> Date Prepared: 4/17/95 4/17/95 4/17/95 4/17/95 4/17/95 4/17/95 <br /> Date Analyzed: 4/18/95 4/18/95 4/18/95 4/18/95 4/18/95 4/18/95 <br /> Instrument I D # GC/MS 1 GC/MS 1 GC/MS 1 GC/MS 1 GC/MS 1 GC/MS 1 <br /> . LCS % <br /> Recovery 63 65 66 64 68 59 <br /> Control Limrts: 12-89 27-123 36-97 41-116 39-98 23-97 <br /> MS/MSO <br /> Batch## BLK041795 BLK041795 BLK041795 BLK041795 BLK041795 BLK041795 <br /> Date Prepared: 4/17/95 4/17/95 4/17/95 4/17/95 4/17/95 4/17/95 <br /> Date Analyzed: 4/18/95 4/18/95 4/18/95 4/18/95 4/18/95 4/18/95 <br /> Instrument I.D # GC/MS 1 GC/MS 1 GC/MS 1 GC/MS 1 GC/MS 1 GC/MS 1 <br /> Matrix Spike <br /> % Recovery: 53 65 66 64 68 59 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 53 66 64 66 66 58 <br /> Relative% <br /> Difference: 00 1 5 31 31 30 1 7 <br /> Please Note <br /> �EGUCIA ANALYTICAL The LCS is a control sample of known,interferent free matnx that is analyzed using the same reagents <br /> n preparation and analytical methods employed for the samples The LCS%recovery data is used for <br /> ,� f r�'L��� r n�1 validation of sample batch results Due to matnx effects,the QC limits for MS/MSG <br /> r9 are ad <br /> visory only <br /> t�V VVVItt 1 and are not used to accept or reject batch results <br /> Linda C chneider <br /> Project Manager Page 1 of 2 <br /> 5040530 FUG <11> <br />