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2Q9298524Q T ENV I RD SRV I�dC r `+ 082 P03 NUU 1'7 '92 12,24 <br /> i n� <br /> � 5b•� <br /> point, 47'C. Tire ol erb <br /> � t` shouid� loave c Trio^lmeast�r�b�u residue on <br /> Bol l i ►p sv <br /> evaporatlon; distill if 00c scary. <br /> \6.0 SAMPLE COLLECTIONPRES VT9OR, AND HANDLING <br /> b.= Transfers of a solvent . should ngj <br /> -involve any plastic Ubing i thQ assembly. <br /> 6.2 Sample transfer impltMents: implements are required to transfer <br /> ortions of solid, semfsl , and liquid Cwastes from sample containers to <br /> laboratory glassware, i.iqu ds m be transferred using a glass bypodermit <br /> syringe. solids may be trap ferrel using a,�Spatula, spoon, or Coring device. <br /> 6.3 Any turbidity suspended solids in the extraction flask should <br /> be removed by filtering tura gh 9re&90-free cotton Or glass wool. <br /> 7.0 PROCEDURE <br /> 7.1 Determination o Sample Dry Weejght Fraction . <br /> 7.1.1 Neigh 40 g of the sample into a tared crucible. <br /> Determine the dry Wai t fraction of the sample by drying overnight at <br /> NOTE: The drying ov n should nnmay result from a hea�+tly <br /> in I hood or vented. <br /> Significant1+la rata co <br /> contaminated h ardour waste sample. <br /> Allow to cool 0 a desiccator' before weighing: <br /> dry we ht fraction Lmuzy Simla <br /> g a sampU . <br /> • ?.2 Sample RandlSn' . <br /> 7.2.1 sludge amples ; <br /> 7. .1. We i 9h out 120 + 0.5 g of wet sl udg4 with a known <br /> dry-weight fra ion (Section 7.1) • place in a 150-mL beaker. <br /> 7.2.1. Acidify to a phi of 2 with approximately 0.3 mL <br /> concentrated: H . <br /> 7.2.1. add 25 g prepared MgjSO4 • N0 and stir to a <br /> smooth paste. <br /> 7.2.1. . Sproad paste on sides of beaker to facilitate <br /> evaporation. 'et stand about 15;30 min or until substance is <br /> solidified.. <br /> F aReplacement solvent iii l be specifi4d in a forthcoming.regulat.ion. <br /> 9071A 3 la�evis;o� 1 <br /> v : 1990 <br /> e # � TOTAL P-03 <br />