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QUALITY CONTROL REPORT <br /> Laboratory Control Sample/Laboratory Control Sample Duplicate <br /> ethod 8015 - Modified <br />' LP 8514 Batch # 931203-2001 <br /> Date Of Analysis 12/07/93 Spike Sample ID LCSW/LCSDW 73 _ <br /> Column DB-1 Spike ID Code W2-1917 <br /> Instrument # PGC 6 Surrogate ID Code NA <br />' Matrix Water Units mR/L _ <br /> (a) (b) (C) (d) (f) (g) ACCEPTANCE <br />' LIM1T5 <br /> SAMPLE + SAMPLE SPIKE <br /> SAMPLE SPIKE SPIKE SPIKE DUP + DUP <br /> COMPOUNDS CONC CONC CONC REC % SPIKE CONC REC % RPD% %REC RPD <br /> i <br />' Dwsel 0 250 249 100 264 106 6 34- 153 c 25 <br /> Spike Recovery - d - ((c-a)/b) x 100 <br />' Spike Duplicate Recovery - f m ((e-a)/b) x 100 <br /> Relative Percent Difference - g e ( Ic-el )/((c+e) x 5) x 100 <br /> 1 <br />' MBT Environmental <br /> Laboratories ���'�� (CN8514) <br />