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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364-9600 FAX(415) 364-9233 <br /> 1900 Bates Avenue, Suite L Concord CA 94520 (510) 686-9600 FAX(5 10) 686-9689 <br /> Analytical 819 Sinker Avenue Suite 8 Sacramento CA 95834 (916) 921-9600 FAX(916)921-0100 <br /> Mlttelhauser Corporation y x ~WClient Project ID 2168 01-001,Unocal/Tracy <br /> '7901 Stonendge Drive, Suite 123 Matrix Solid <br /> ' Pleasanton, CA 94588 <br /> (Attention R Marks/R Papler Work Order # 9502243-01-2 Reported Feb 9, 1995 <br /> , ..�i a ,t", v.,.}.. r r''vc ", r r • ., r x r+�:r c r w,w.4ni` ',4, <br /> ' QUALITY CONTROL DATA REPORT <br /> Analyte. Phenol 2-Chioraphenol 1,4pichioro N-Nitroso-Dl- <br /> ' benzene N-propylarnine <br /> QC Batch#: MS0131958270EXA MS013195a270EXA M5013195a270EXA MS0131958270EXA <br /> Analy Method: EPA 8270 EPA 8270 EPA 8270 EPA 8270 <br /> ' Prep. Method: EPA 3550 EPA 3550 EPA 3550 EPA 3550 <br /> Analyst: E.Manuel E Manuel E Manuel E Manuel <br /> MS/MSD #: 9501F1701 960IF1701 9501F1701 9501F1701 <br /> ' Sample Conn. ND N D N D ND <br /> Prepared Date: 1/31/95 1/31/95 1/31/95 1/31/95 <br /> Analyzed Date: 2/1/95 2/1/95 2/1/95 2/1/95 <br /> ' Instrument I.D.#: F4 F4 F4 Fa <br /> Cone. Spiked: 3300 yg/Kg 3300 ug/Kg 3300 Pg/Kg 3300 us/Kg <br /> Result: 2400 2200 2100 2300 <br /> MS% Recovery: 73 67 64 70 <br /> Dup. Resutt: 2600 2400 2300 2400 <br /> MSD % Recov.: 79 73 70 73 <br /> RPD: 80 87 91 43 <br /> RPD Limit: 0-50 0-50 o-50 0 <br /> 1 r n..,� 'x,., , r..r, ..v...�, v yr", ..,:::•V �.`;'f", �` J z4`.ya y"`rih'�"�'k'�n^.c r�i4'crc^".. .. }A ,mow.,Yr, £daT{:^r�r�,�arv„s-ter }.,..s'Pro]. :ri:""�t: t <br /> LCS #: - - - <br /> Prepared Date: - - - - <br /> Analyzed Date: - - - <br /> ' Instrument I.D.#: <br /> Cone. Spiked: <br /> LCS Result: - - - <br /> LCS % Recov.: - - - <br /> M <br /> LCS 5.112 23-134 20-124 DL-230 <br /> Control Limits <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 matrix spike is an aliquot of sample <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure 9 <br /> the recovery of analytes from the matrix spike does not fail within specified control limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> Vickie Tague **MS=Matrix Spike,MSD=MS Duplicate,RPD.Relative%Difference <br /> ' Project Manager Page 1 of 3 9502243 MMM <8> <br />