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SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue + Suite LM • Concord,California 94520 <br /> JW <br /> (510) 686-9600 • FAX (510) 686-9689 <br /> rvuMYrmYx& t�ews le�t Kr <br /> fD " Arco#�i 0, Stociitnn <br /> 1855 Gateway Blvd . Ste 770 Matrix Soil <br /> Concord, CA 94520 <br /> N Attention Paul Supple OC Sample Goup 3080809-812 Reported Sep 2, 1993 <br /> �trya:,u{'m 3. 4 t ♦ r,.4 v vv .v } .r}iwn.rn .. by r yr . n rn v ,. w,t ry r v n v rr i n ht �r ry <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE: 1,1-Dichloro- Trichloroethene Chloro- <br /> ethene Benzene Lead <br /> Method, EPA 8010 EPA 8010 EPA 8010 EPA 7421 <br />' Analyst. K N K N K N K A. <br /> Conc Spiked. 10 10 10 50 <br /> Units pg/Kg Ng/Kg N9/Kg Fig/Kg <br /> ' LCS Batch#. LCS082593 LCS082593 LCS082593 BLK082593MS <br /> Date Prepared 6/25/93 8/25/93 8/25/93 8/25/93 <br /> Date Analyzed 8/25/93 8/25/93 8/25/93 8/26/93 <br /> 'Instrument I D.# HP-5890/1 HP-5890/1 HP-5890/1 SpectrAA-400 <br /> LCS % <br /> Recovery- 87 88 76 91 <br /> Control Limits. 70-130 70-130 70-130 75-125 <br /> ,rvrvr ao{ h J v } • Frr ! .. ` v l t } ` vi } r ♦ r `rry } }v 4 ♦ ` t C <br /> MS/MSD <br /> ' Batch #: 3080810 3080810 3080810 3080778 <br /> Date Prepared: 8/25/93 8/25/93 8/25/93 8/25/93 <br /> Date Analyzed. 8/25/93 8/25/93 8/25/93 8/26/93 <br /> 'Instrument I.D.#: HP-5890/1 HP,-"/1 HP-5890/1 SpectrAA W <br /> Matnx Spike <br /> ' %Recovery 75 90 85 91 <br /> Matrtx Spike <br /> ' Duplicate% <br /> Recovery- 67 88 82 91 <br /> Relative% <br /> ' Difference: 11 22 36 0 0 <br /> Please Note <br /> The LCS is a control sample of known,Interferent free matrix that is analyzed using the same reagents, <br /> EOUOIA A ICAL 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 CC limits for MS/MSD's are advisory only <br /> —an—MuiyooAaed to acce t or reject batch results <br /> Kenneth KF Lee <br /> Laboratory Director <br /> ' 3080807 ROU <9> <br />