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QUALITY CONTROL REPORT.- <br /> Laboratory Control Sample/Laboratory Control Sample Duplicate <br /> Method 5015 - Modified <br /> LP# 6743 <br /> Analyst ES Batch # 921105-0303 <br /> Date Of Analysis ll/)9Z92 Spike Sample ID LCSS/LCSDS #27 <br /> Column DB1 Spike ID Code W2-1325 , W2-1144 <br /> Instrument # PGC#6 Surrogate ID Code NA <br /> Matrix Soil Units <br /> (a) (b) (c) (d) (c) (t) (g) ACCEPTANCE <br /> LIMITS <br /> SAMPLE + SAMPLE SPIKE <br /> SAMPLE SPIKE SPIKE SPIKE DUP + DUP <br /> COMPOUNDS CONC CONC CONC REC `!o SPIKE CONC REC oto RPD % REC- RPD <br /> C/O <br /> Gasoline 0 83 60 72 1 63 76 1 5 40-94 < 25 <br /> Diesel 0 83 8S 102 BS 106 3 50- 121 C_ 25 <br /> • Spike Recovery - d - ( (c-a)/b) x 100 <br /> Spike Duplicate Recovery - f - ( (e-a)/b) x 100 <br /> Relative Percent- Difference - g - ( Ic-el )/((c+e) x 5) x 100 <br /> WMqgqmnsm <br /> af <br /> ENVIRONMENTAL ENGINEERING CORPORATION oxo t <br />