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Sequoia 444 N Wiget Lane <br /> Walnut Creek,CA 94598 <br /> 4wr Analytical - _ _ - _ =- =T-_ -_ _F-Ax(925)988-9600 <br /> - -—_ - - - -- - - (978)98$-9673 <br /> GettlerRyan,Inc -Dubltn Project Unocal <br /> §747 Sierra Court Suite J Project Number Unocal SS#5886 <br /> Dublin CA,94568 Project Manager- Deanna L Hardin Reported <br /> g 14-Sep-99 17 49 <br /> -�Volatlle Organic Compounds WEPA Method-8260A <br /> Sequoia Analytical -Walnut Creek <br /> Reportmg <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-5S(W908373-08)Water Sampled 17-Aug-99 09 30 Received 18-Aug-99 14 00 <br /> Ethanbl ND 500 ug/I 1 9H31005 30-Aug-99 31-Aug-99 EPA 8260A <br /> tert-Butyl alcohol ND 100 <br /> Methyl tert-butyl ether 65 20 <br /> Di-isopropyl ether ND 20 <br /> Ethyl tert butyl ether ND 20 <br /> tert-Amyl methyl ether ND 20 <br /> Surrogate Dibrontofluoromethane 106% 50-150 <br /> Surrogate 12-Dtchforoethaned4 980% 50-1j0 <br /> MW-61)(W908373-09)Water Sampled 17-Aug-99 11 37 Received 18-Aug-99 14 00 <br /> Ethanol ND 500 Ug/I I 9H31005 30-Aug-99 31-Aug-99 EM8260A <br /> tert-But,,I alt01101 ND 100 <br /> MethNI Cert-hutvl ether 88 20 <br /> Dt-i�,opropN l ether ND 20 <br /> Eth�1 tert-btitN I ether ND 20 <br /> tent-Ain I meth%l ether ND 20 <br /> Srrtrogate Dlhtanrofluoioniethane 106% j0-IjO <br /> Surrogate 1 2-Dichloroethane-d4 106% 50-150 <br /> NTW-4S(W908373-10)Water Sampled 17-Aug-99 11 08 Retened 18-Au;-99 14 00 <br /> Ethanol ND 500 ugll I 9H31005 30-Aug 99 3I-Aug-99 EM9260A <br /> tart-Buhl alcohol ND 100 <br /> MLthfl Cert-huts I tthtr 27 20 <br /> Di-i,opropA ether ND 20 <br /> Eth%I tut-hutvl Ether ND 20 <br /> tt-rt-AtmI metlivl ether ND 2 0 <br /> Surrogate DiNonrofhroromethane 106% 50-150 <br /> Surrogate 1 2-Dichloroethane- 4 102% 50-150 <br /> S equ0111 Ana lyt ical - Walnut Creek The results in tin r►apart apply to aw rarnp le r w ulh the chn n rj <br /> curt rxly drxranent Thr v amlvtical rep art nrn rt he rep minced in r it enn ret, <br /> 1 <br /> T <br /> C,19 <br /> !cg ey rop i.t anag <br /> P.�e 8 of 16 <br />