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ER/IKONMENTAL u <br /> Analytical Chemists <br /> H <br /> r- <br /> March 24, 1997 ORGANIC quality Assurance Report For sample. 731427 <br /> Granite Construction Company <br /> P 0 Box 151 <br /> Stockton , CA 95201 <br /> 0 <br /> BATCH EPA CALIBRATION OA/QC METHOD OA/4C ( r� <br /> [onstrturn[ ID Method Units Type Conc. % REC AR NOTE Type cont X REC y REC AR X DIF NAV NOTE p <br /> rr <br /> gpg OL 2A 642/$02D vg/L LCS 20 0 100 77-113 MS 20 0 103 100 61-130 3 1 5 8 <br /> Benzene OL 2A 602/8020 ug/L LCS 20 0 108 77-119 KS 20 0 100 96.8 75-116 3 3 25 1 <br /> Rhyl 6enterie <br /> —6-L-2—A b02/8020 ug/L LCS 20.0 103 79-120 HS 20 0 101 98.3 80-114 2.6 8_1 <br /> 19.8 20.0 <br /> Hethyl tert-Butyl Ether DL 2A 602/8020 ug/L LCS 20 0 91 0 70-130 HS 20 0 66 9 B2.2 61-14G <br /> Toluene DL 2A 642/0020 ug/L TCS 20 0 103 81 113 NS 20 0 98 9 96 5 71-120 2.5 24.4 <br /> OL 2A /0020 u /L LCS 60 g 0 104 78 118 60 0 1Q2 98 O 8-126 3 9 15.4 <br /> 602til <br /> Xy 1 er►e MS � <br /> r <br /> m <br /> FGL ID = 19970319 N/A => Not Applicable NOFE => See note indicated below. Z <br /> HM <br /> N <br /> Q <br /> 7 <br /> _a <br /> FGL ENVIRONMENTAL, INC ' <br /> CJ.jgc �~ <br /> Charles Johnson, B.S. , QA/QC Officer <br /> 1 <br /> a!aI 4l C�c��Latz�ral,xx oKce atmlQrY o <br /> 2500 Stageooach Roar] TELVisaba, 91 73 --3 r-' <br /> P t7 Son 272/853 Cnrpnrahon Strrrl TEL {2091 7349475 <br /> Salva Pada CA 93061272 7? Stocklan C4 95215 <br /> r. A ici r cn n)w TFL 12(1*)}902 001 bt' l l 1209)73r. I <br />