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iHOUSTON LABORATORY <br /> SW INTERCHANGE ORWE <br /> HOUSTON,TEXAS 77054 <br /> ® (713)6600901 <br /> Quality Control Report <br /> EXXON Company U S A <br /> 000210-Z2 <br /> talysis. Volatile Organics Method 82608 WorkOrder 00020338 <br /> ,Method SW0260B Lab Batch ID 89084 <br /> Method Blank Samples in Analytical batch <br /> RUnlD L_0002146-190323 Units ug/L Lab Sample ID Client Sample ID <br /> �nalysis Date 02114/2000 12 24 Analyst LT 00020358-01 B MW-1 <br /> 00020358-02B MW-4 <br /> 00020358-03B MW-5 <br /> X20358-04B MW-6 <br /> Anatyte Result Rep Limit <br /> 00020358-05B MW-7 <br /> 12-Dlchloroethane ND 50 <br /> Benzene ND 50 00020358-06B MW-8 <br /> Olisopropyl ether ND 10 00020358-07B MW-9 <br /> ' Et benzene ND 50 00020358-086 MW-10 <br /> Methyl tert-butyl ether ND 50 <br /> t-B alcohol ND SMI00020358-098 Trip Blank <br /> tart-Am moftd ether ND 16 <br /> ' tart-B eth ether, ND 10 <br /> Toluene ND 50 <br /> X enes Total ND 50 <br /> Sum 1 2-Dichloroethane-d4 966 80-120 <br /> Surr 4-Bromo(luorobenzene 92 0 86-115 <br /> Surr Toluene-d8 1040 88-110 <br /> J Laboratory Control Sample(LCS) <br /> RunID L_000214B-190322 Units ug/L <br /> Analysis Date 02/1412000 11 32 Analyst LT <br /> ' Analyte Spike Result Percent Lower Upper <br /> Added Recovery Limit Limit <br /> 1 1-Dichioroethene 50 41 82 61 145 <br /> ' Benzene 50 44 88 76 127 <br /> Chlorobenzene 50 47 94 75 130 <br /> Toluene 50 45 90 76 125 <br /> ' Trichloroethene 501 45 90 71 120 <br /> ' Matrix Spike IMS)1 Matrix Spike Duplicate(MSDI <br /> Sample Spiked 00020358-01 <br /> RunlD L_GW214B-190330 Units ug/L <br /> ' Analysis Date 02!14/2000 15 53 Analyst LT <br /> Analyte Sample Result MS MS Result MS% MSD MSD Result MSD% RPD RPD Low High <br /> Spike Recovery Spike Recovery Limit Limit Limit <br /> Added Added <br /> 1-Dichloroethene ND 50 46 92 50 45 90 2 14 61 145 <br /> ane ND 50 49 98 50 48 % 2 11 76 127 <br /> nzene NDI 501 501 100 50 50 100 0 13 75 130 <br /> alifters ND/U-Not Detected at the Reporting Limit •-Recovery Outside Advisable QC Limits <br /> B-Analyte detected in the associated Method Blank D-Recovery Unreportable due to Dilution <br /> J-Estimated value between MDL and PQL <br /> 1 <br /> =1100 1 26 06 PM <br />