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C <br /> Seuoia 885 Jarvis Drive <br /> q Morgan Hill CA 95037 <br /> �„� Analytical (408) 776-9600 <br /> ' caFAX(408) 78Z-6308 <br /> I <br /> Ground Zero Analysis Inc Project Knowles Rock Sampled 6/21/99 <br /> 1714 Mair.St Project Number 96-163 Received 6/22/99 <br /> hscalOr7,CA 95320 � Project Manager Justin Powers � Reported 7/2/99 <br /> Total Purgeable Hydrocarbons(C6-C12)and BTEX by DHS LUFT/Quality Control <br /> Sequoia Analytical-Morgan Hill <br /> ' Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> ' Batch 9060276 Date Prepared 6123199 Extraction Method EPA 5030B (P/TI <br /> Blank 9060276-BLK1 <br /> Purgeable FlydTombons 6/23/99 ND Ug!] 500 <br /> Benzene ND i; 0 500 <br /> Toluene ND 0 500 <br /> Eth)lbenzene ND 0 500 <br /> ' <br /> Xylenes(iota/) - - -- - -- ---- —-- — -- - -- ND - „ - ---- 0500 - --- -- ---- <br /> Surrogate a a o-Trrftuorotoluenc IO 0 950 700-130 95 0 <br /> LCS 9060276-BSI <br /> Benzene 6/23/99 100 9 16 ag/l 700-130 91 6 <br /> roluene 100 879 700-130 879 <br /> Lthvlbenze is 100 925 700-130 925 <br /> Xylenes ttota,) —300 274 700-130 913 <br /> err ogete v a a 'F, i r)r voiacne - 100 - _ 991 - 10 n-I?? 9!1 I - <br /> _1atrix Spike 9060276-MS1 M906287-01 <br /> Benzene 6123/99 10 0 ND 929 ugh 60 0-,40 92 9 <br /> ' To'uene i 100 ND 886 600-140 886 <br /> Ethylbenzene 100 ND 935 600-140 93 5 <br /> _Xylenes(total) _ _ 300 ND 27 5 50_0-140917 <br /> ' Surrogate a v a-T)J',rorotc luene 100 9 11 70 0-730 91 1 <br /> Matrix Spike Dula 9060276-MSD1 M906287-01 <br /> Benzene 6/23/99 10 0 ND 8 76 ug/1 600-140 876 250 587 <br /> ' Toluene too ND 836 " 600-140 83 6 250 581 <br /> Ethylbenzene 100 ND 879 600-140 879 25 0 617 <br /> Xylenes(total) _ _ _ _ 300 _ ND_ 2_5_9_ _ 600-140_ 86.3 250 607 <br /> ' Surrogate a a a 7-111uorotoluene 100 826 700-130 826 — <br /> fe—quoia Analytical-Morgan Hill *Refer to end of report for text of notes and definitions <br /> ' Page 4 of 6 <br />