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Sequoia 680 Chesapeake D nve Redwood City CA 94063 (650)364 9600 FAX(650)364-9733 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988 9600 FAX(925)988-9673 <br /> 819 Straker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)92 1-0 100 <br /> Analytical 1455 McDowell Blvd North Ste 17 Petaluma CA 94954 (707) 792 1865 FAX(707)792 0342 <br /> 1551 Industrial Road San Carlos CA 94070 41 11 (650) 232 9600 FAX(650)232 961 Z <br /> 0 <br /> Emcon- Pinnacle Project Arco 2168, Stockton, CA Sampled 2/17/99 to 2/18/99 <br /> 3939 Cambridge Road,Ste 202 Project Number 21775-234 004 Received 2/18/99 <br /> Cameron Park,CA 95682 Project Manager Dave Foley Reported 3/4/99 <br /> Total Purgeable Hydrocarbons(C6-C12), BTEX and MTBE by DHS LUFT/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recon RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Nates* <br /> 9020272- Kt <br /> Surrogate aa9 10 0 961 u9/1 600-140 961 <br /> L-CS 90202 li-a4] <br /> 3enzene 2/23/99 100 972 ug/l 700-130 972 <br /> roluene 100 9 75 70 0-130 97 6 <br />-thylbenzene 100 957 70 0-130 95 7 <br /><ylenes(total) 300 28 8 70 0-130 95 0 <br />✓/ethyl tert-butyl ether 10 0 11 6 700-130 116 <br /> urrogate a a a-Trifluorotoluene 100 101 60 0 140 101 <br /> Matrix, prk 9020272-MS1 E202297-04 <br /> lenzene 2123/99 100 ND 9 73 ug/I 60 0-140 47 3 <br /> oluene 100 ND 9 61 60 0-140 96 1 <br /> th benzene 100 ND 954 600-140 954 <br /> s(total) 300 ND 288 60 0-140 96 0 <br /> t 1 tert-butyl ether 100 790 104 600-140 NR 2 <br /> urrogale a a a-Trifluorotoluene 100 938 600-140 93 8 <br /> latrix Spihe DjiI2 2920272-MSD/ 5202297-04 <br /> enzene 2/23199 100 ND 9 83 ug/I 600-140 98 3 25 0 1 02 <br /> aluene 100 ND 9 73 60 0-140 97 3 25 0 1 24 <br /> thylhenzene 100 ND 967 600-140 967 25 0 1 35 <br /> ylenes(total) 300 ND 29 1 " 60 0-140 97 25 0 1 04 <br /> 0 <br /> ethyl tert-butyl ether 100 790 101 60 0-140 7 0 25 0 12 8 2 <br /> crtogale a a a Truluorololuene 100 9 78 600-140 978 <br /> atc�,Q <br />� 9Q20291-01K( Extraction Methp Pa cn3nu(nir) <br /> lrgeable Hydrocarbons 2/24/99 ND ug/l 500 <br /> nzene ND 0 500 <br />�luene ND 0 500 <br /> hylbenzene ND 0 500 <br />,lenes(total) " ND 0 500 <br /> ethyl tert-butyl ether ND 500 <br /> rrogate a a a Trtfluorotoluene <br /> 100 966 600- 40 96 6 <br />� 402029]-BS1 <br /> nzene 2/24/99 100 951 ug/1 700-130 95 1 <br /> luene 10 0 952 700-130 95 2 <br /> iylbenzene 100 942 70 0-130 94 2 <br /> le {total) 30 0 28 4 700-130 94 7 <br /> Ilu total <br /> - Sacramento *Refer to end of report for tert of notes and definitions <br /> iald W 130bel Client Services Representative Page 7 of 10 <br />