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Intertek Testing Services Environmental Laboratories REPORT DATE 20-MAY-1997 REPORT NUMBER D97-5707 SAMPLE SUBMITTED BY ITS/San Jose ATTENTION Todd Geringer PROJECT 555 CATELLUS-STOCKTON LABORATORY QUALITY CONTROL REPORT ANALYTE Benzene Ethylbenzene Ferrous Iron Methane Ethane BATCH NO 35-051397 35-051397 084027 F051297-1 F051297-1 LCS LOT NO AC033-20A AC033-20A 0980166 -- '- PREP METHOD --- --- --` --- --- PREPARED BY ANALYSIS METHOD EPA 8021 Mod EPA 8021 Mod SM 3500-Fe D RSK 175 RSK 175 ANALYZED BY JCH JCH BAF S_S S_S UNITS µg/L µg/L mg/L ppbw ppbw METHOD BLANK < 2 00 < 2 00 < 0 0500 < 0 500 < 0 500 SPIKE LEVEL 20 0 20 0 2 00 3 68 6 93 SPK REC LIMITS 77 0 - 123 63 0 - 137 80 0 - 120 70 0 - 130 70 0 - 130 SPK RPD LIMITS 25 0 25 0 10 0 30 0 30 0 MS RESULT 22 9 24 4 NS NA NA MS RECOVERY % 115 122 NS NA NA MSD RESULT 23 2 24 7 NS NA NA MSD RECOVERY % 116 124 NS NA NA MS/MSD RPD % 1 30 1 22 NS NA NA BS RESULT NA NA 2 19 3 24 6 75 BS RECOVERY % NA NA 110 88 0 97 4 BSD RESULT NA NA 2 20 3 43 6 72 BSD RECOVERY % NA NA 110 93 2 97 0 BS/BSD RPD % NA NA 0 46 5 70 0 45 DUP RPD LIMITS --- --- --- --- --- DUPLICATE RPD % NA NA NC NA NA LCS LEVEL 20 0 20 0 2 00 3 68 6 93 LCS REC LIMITS 70 0 - 123 63 0 - 137 80 0 - 120 70 0 - 130 70 0 - 130 LCS RESULT 21 7 22 4 2 10 SEE—BS SEE—BS LCS RECOVERY % 109 112 105 SEE BS SEE B5 SPIKE SAMPLE ID 5618-1 5618-1 --- --- --- SAMPLE VALUE < 200 < 2 00 --- '_ _ DUP SAMPLE ID ` - 5707-2 DUP SAMPLE VAL/1 --- - - --- --- DUP SAMPLE VAL/2 -- - - --- --- --- NA Not applicable NS Insufficient sample available for MS/MSD BS/BSD used NC — Nat calculable SEE 85 LCS and LCS Duplicate reported as 85 and BSD lntertek Testing Services NA Inc 1089 East Collins Boulevard Richardson, TX 75081 Telephone (972) 238-5591 Fax (972) 238-5592