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1 <br /> i <br /> Alpha Analytical Laboratories Inc 860 Waugh Lane, H-1, Ukiah, California 95482 <br /> Order#A00091405 e-mail clientservices0alpha-labs cam • Phone (707) 468-0401 Fax (707} 468-5267 <br /> Page 1 <br />' September 25, 2000 <br />' Advanced Geo <br /> 4005 N Wilson Way <br /> Stockton, CA 95205 <br />' Quality Control Report <br /> P <br /> Matrix Duplicate <br />' Spike Spike <br /> Method Recovery Recovery RPD <br /> Blank % % % <br />' Matrix Aqueous <br /> QC Batch MJS 1412073 <br /> i <br /> Benzene NO 1075 1163 7 9 <br /> Toluene NO 1095 1158 5 6 <br /> Ethylbenzene NO 1072 1127 5 0 <br /> Total Xylene NO 1088 1132 4 0 <br /> Methyl-t-butyl ether NO 94 4 98 7 4 5 <br /> Dusopropyl ether NO 933 1005 7 4 <br /> Ethyl-t-butyl ether NO 89 5 950 6 1 <br /> Tert-amyl mehtyl ether NO 1025 1071 4 4 <br /> Tert-Butanol ND 1038 1031 0 6 <br /> QC Batch MJS 1412074 <br /> I Benzene NO 94 0 1003 6 5 <br /> Toluene NO 1038 1091 5 0 <br /> Ethylbenzene NO 981 1035 5 4 <br /> Total Xylene NO 992 1048 5 5 <br /> Methyl-t-butyl ether NO 837 854 2 1 <br /> Dusopropyl ether NO 84 9 881 3 8 <br /> Ethyl-t-butyl ether NO �— —6666 �' 70 5 5 6 <br /> Tert-amyl mehtyl ether NO 78-1—``- 81 1 3 7 <br /> 1 Tert-Butanol NO 956 915 4 4 <br /> This batch passes method quality control acceptance criteria <br /> IND=none detected Bruce L Gove, Laboratory Director <br />