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QUALITY CONTROL REPORT <br /> oratory Control Sample/Laborato Control Sample Duplicate <br /> 1 Petroleum Hydrocarbons TPH-Gasoline <br /> Analyst TL LP# 7639A <br /> Date of Analysis 05/21/93 Spike Sample ID LCS LCSDS Gas-49 <br /> Column DB624 Spike ID Code W-1-316 <br /> Instrument # 6 Surrogate ID Code W-1-681 <br /> Batch # 930520-0901 Matrix Soil Units m K <br /> (a) (b) (C) (d) °) ACCEPTANCE <br /> LIMI'T'S <br /> SAMPLE + SAMPLE DUP SPIKE <br /> SAMPLE SPIKE SPIKE SPIKE + DUP <br /> COMPOUNDS CONC. CONC CONC REC %a SPIKE CONC. REC 17c RPD X10 %REC. RPT? <br /> as <br /> 0 2S0 390 116 365 11a 2 75- 125 X25 <br /> Spike Recovery = d — ((c-a)/b) x 100 <br /> Spike Duplicate Recovery = f = ((e-a)/b) x 100 <br /> Relative Percent Difference m g = ( ic-el )/( (c+e) x 5) x 100 <br /> (h) (I) <br /> SAMPLE + <br /> SURROGATE SPIKE SURROGATE SPIKE SURROGATE ACCEPTANCE LIMM <br /> SURROGATE COMPOUNDS CONC CONC RECOVERYc7r % REC <br /> hochlorotoluene <br /> 0200 0 190 90 56- 131 <br /> Surrogate % Recovery 3 (i/h) x 100 <br /> MBT Environmental r ZI. _ 5u <br /> Laboratoriesi� <br /> 1l��11 <br />