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Project Number: SFB-175-0204.72 <br /> Consultant Project Number: 203-175-3289 <br /> Contract Number: N46CWCO244-9-X <br /> Facility Number: 9-0342 <br /> Work Order Number: D002239 <br /> Report Issue Date: February 22, 1990 <br /> Table 4 <br /> MATRIX SPIKE (MS) RECOVERY REPORT <br /> Ethylene Dibromide in Soil <br /> Modified EPA Method 504 <br /> Date of Ana"lysis: 02/17/90 Client ID: Tank #4 <br /> Sample Spiked: 04 Units: mg/Kg <br /> Sample Amount MS, % Acceptability <br /> Analyte Result Added MS Result Recovery Limits, %1 <br /> Ethylene Dibromide <0.2 0.2 0.19 95 80-120 <br /> 1 = Acceptability limits are derived from the 99% confidence interval of all samples during the previous <br /> quarter. <br /> .4 = Not detected at the indicated detection limit. <br /> Table 5 <br /> LABORATORY DUPLICATE SAMPLE RESULTS <br /> AND RELATIVE PERCENT DIFFERENCE (RPO) REPORT <br /> Ethylene Dibromide in Soil <br /> Modified EPA Method 504 <br /> Hate of Analysis: 02/17/90 Client 1 D: Tank #4 <br /> Sample Used: 04 Units: mg/Kg <br /> Analyte Sample Result Duplicate Result RPD, % Maximum RPD, % <br /> Ethylene Dibromide <0.2 <0.2 NA 30 <br /> NA = Not Applicable <br /> GTEL Concord, CA Page 6 of 6 <br /> D002239.DDC s <br /> GTE L , <br /> ENVIRONMENTAL <br /> LABORATORIES, INC. <br /> s <br />�"a <br />