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~ ~~~ <br />CORE LABORATORIES <br />I S U R R O G A T E R E C O V E R I E S R E P O R T <br />Job Number.: 971377 Report Date: 06/30/97 <br />I CUSTOMER: Greystone PROJECT: COStILLA LO LANDFILL ATTN: Nick Mathis <br />Method ........... <br />I Method Code...... ..: EPA 624 <br />..: 624 Batch..... <br />Analyst ... .........: 22410 <br />.........: klk <br /> <br /> Surrogate Units <br />' 4-B romof luarobenzene ug/L <br /> <br />' Lab ID Matrix OL Type Dilution Result <br />RS 43.28 <br />MB 43.01 <br />971377.1 47.94 <br />,971377.2 44.98 <br />971377-3 45.61 <br />' Surrogate Units <br />D ibronpfluoromethene ug/L <br />' Lab ID Matrix OC Type Dilution Result <br />RS 52.50 <br />MB 54.28 <br />'971377-1 55.67 <br />971377-2 55.64 <br />971377.3 55.76 <br />True Value Percent Recovery Flag Dete Time <br />50.172 863 06/01/97 1654 <br />50.172 85.7 x 06/01/97 1828 <br />50.172 95.6 06/02/97 0950 <br />50.172 89.7 06/02/97 0122 <br />50.172 90.9 06/02/97 0153 <br />True Value Percent Recovery Flag Date Time <br />50.190 104.6 06/01/97 1654 <br />50.190 108.1 06/01/97 1828 <br />50.190 110.9 06/02/97 0950 <br />50.190 110.9 06/02/97 0122 <br />50.190 111.1 06/02/97 0153 <br />' Surrogate Units <br /> Toluene-d8 ugll <br />' Lab ID Matrix OC Type Dilution Result True Value Percent Recovery flag Date Time <br />RS 47.89 50.175 95.4 06/01/97 1654 <br />MB <br />,971377.1 48.97 <br />50.72 50.175 <br />50.175 97.6 <br />101.1 06/01!97 <br />06/02/97 1828 <br />0950 <br />971377.2 48.93 50.175 97.5 06/02/97 0122 <br />971377-3 49.30 50.175 98.3 06/02/97 0153 <br />1 <br />Method .............: EPA 625 Batch..............: 22412 <br />Nethod Code........: 625 Analyst ............: mla <br />' Surrogate Units <br />2,4,6-Tribronophenol ug/L <br />' Lab ID Matrix OC Type Dilution Result True Value Percent Recovery Flag Dale Time <br />MB 1.00 76.86 100.51 76 06/07/97 0057 <br />LCS 1.00 84.40 100.51 84 06/07/97 0158 <br />Page 35 <br />