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COULAB CORE LABORATORIES <br /> 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 990877 Report Date 05/31/1999 <br /> ' CUSTOMER IT Group PROJECT Southland Martinez ATTN Shelby Lathrop <br /> Surrogate Units <br /> Dibromofluoromethane ug/L <br /> ' Lab ID Matrix OC Type Dilution Result True Value Percent Recovery Limits Flag Date Time <br /> LCS 1 8 93 10 000 89 3 79-132 05/26/1999 2113 <br /> MB 1 9 54 10 000 95 4 79-132 05/26/1999 2156 <br /> 990877 3 Solid 1 10 70 10 000 107 0 73-136 05/26/1999 2239 <br /> 990877-4 Solid 1 10 28 10 000 102 8 73-136 05/26/1999 2322 <br /> 990877-5 Solid 1 10 61 10 000 106 1 73-136 05/27/1999 0004 <br /> 990877-6 Solid 1 6 70 10 000 67 0 73-136 X 05/27/1999 0048 <br /> 990877-11 Solid 1 11 44 10 000 114 4 73-136 05/27/1999 0257 <br /> 990877-16 Solid 1 10 39 10 000 1D3 9 73-136 05/27/1999 0422 <br /> 990877-21 Solid 1 11 36 10 000 113 6 73-136 05/27/1999 2022 <br /> 990877-21 solid MS 10 52 10 000 105 2 73-136 05/27/1999 2147 <br /> 990877 21 Solid MSO 10 77 10 000 107 7 73-136 05/27/1999 ?230 <br /> j;TaoLuene <br /> e Units <br /> d8 ug/L <br /> Lab ID Matrix QC Type Dilution Result True Value Percent Recovery Limits flag Date Time <br /> ' LCs 1 9 22 10 000 92 2 77-117 05/26/1999 2113 <br /> M8 1 B 94 10 000 89 4 77-117 05/26/1999 2156 <br /> 990877-3 Solid 1 9 22 10 000 92 2 81-116 05/26/1999 2239 <br /> 990877 4 Solid 1 8 65 10 000 86 5 B1-116 05/26/1999 2322 <br /> 990877 5 Solid 1 9 05 10 000 90 5 81-116 05/27/1999 0004 <br /> 990877 6 Solid 1 9 87 10 000 98 7 81-116 05/27/1999 0048 <br /> 990877 11 Solid 1 9 55 10 000 95 5 81-116 05/27/1999 0257 <br /> 990877-16 Solid 1 9 15 10 000 91 5 81-116 05/27/1999 0422 <br /> 990877-21 Solid 1 10 74 10 000 107 4 81-116 05/27/1999 2022 <br /> ' 990877-21 Solid MS 9 94 10 000 99 4 81-116 05/27/1999 2147 <br /> 990877-21 sotid MSD 10 26 10 000 102 6 81-116 05/27/1999 2230 <br /> [77�thodVolatile Organics (Client List) Batch 6467 <br /> thod Code 8260C Analyst am <br /> ' Surrogate Units <br /> 4-Bromofluorobenzene ug/L <br /> ' Lab ID Matrix - QC Type Dilution - Result True Value Percent Recovery Limits Flag Date Time <br /> LCS 1 9 65 10 000 96 5 45-112 05/27/1999 1507 <br /> MB 1 9 78 10 000 97 8 45-112 05/27/1999 1549 <br /> 990856 12 Sal id 1 9 63 10 000 96 3 55-11? 05/27/1999 1632 <br /> 990856-13 Solid 1 9 92 10 000 99 2 55-112 05/27/1999 1714 <br /> 990856-14 Solid 1 9 59 10 000 95 9 55-112 05/27/1999 1756 <br /> 990856-16 Solid 1 9 3C 10 000 93 0 55-112 05/27/1999 1838 <br /> 0877-7 Solid 1 8 72 10 000 87 2 55-112 05/27/1999 1921 <br /> 877-9 solid 1 9 29 10 000 92 9 55-112 05/27/1999 2003 <br /> Page 48 <br />