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WORLD OIL CORP. <br /> QA/QC REPORT <br /> SAMPLE ID: 052820-10 PREPARATION DATE: 5/28/2020 <br /> MATRIX: SOLID ANALYSIS DATE: 5/29/2020 <br /> QC LIMITS <br /> COMPOUND METHOD PQL SR SA SSR %REC SSDR %REC %RPD RPD %REC LCS,TV LCS,AC %REC <br /> 1,1-Dichloroethene 8260B 1000 0 25 27 109 26 103 6 20.0 70-130 25 18 71 <br /> Benzene 8260B 1000 0 25 29 115 28 110 5 20.0 70-130 25 21 85 <br /> Trichloroethene 8260B 1000 0 25 28 112 26 105 6 20.0 70-130 25 21 82 <br /> Toluene 8260B 1000 0 25 29 116 28 111 5 20.0 70-130 25 21 83 <br /> Chlorobenzene 82606 1 1000 0 25 27 110 26 105 4 20.0 1 70-130 I 25 22 89 <br /> SAMPLE DF=500 <br /> ND=BELOW THE PQL <br /> %REC=((SSR-SR)/SA)*100 SR=SAMPLE RESULT <br /> LCS=LABORATORY CONTROL SAMPLE SA=SPIKE ADDED <br /> SSR=SAMPLE SPIKE RESULT LCS,TV= LAB CONTROL SAMPLE,TRUE VALUE <br /> SSDR=SAMPLE SPIKE DUPLICATE RESULT LCS,AC= LAB CONTROL SAMPLE,ACTUAL VALUE <br /> RPD= RELATIVE PERCENT DIFFERENCE PQL= PRACTICAL QUANTITATION LIMIT <br /> CHECKED BY: DATE: / ? <br /> REVIEWED BY: DATE: <br />