Laserfiche WebLink
02/23/94 13 21 E 202 376 0917 ncClel land Lab 04 <br />• L'i'-'I'oxicjly f 13101 <br />7'hc method was designed to det~,tthine contaminant mobility from municipal wastes <br />2 <br />(sanitary landfill) in acid rain area. Acetic acid was chosen for adjusting the pH of the <br />simulated meteoric water (Lixiviant) because it best simulated the acid resulting from <br />deny of organic matter placed in the landfill. Acetic acid is not appropriate for <br />evaluating metals mobility from a mine waste principally because lead is mobilized by <br />acetic acid where it would l>e immobile using outer acids. Also, the [est was not <br />dcsigttcd to be applied to hard rock mine wastes. <br />Lixiviant is prepared lty adjusting the pH of 7ypc Il reagent water (Deionized or <br />distilled) to S.U by adding reagent grade glacier acetic acid. Lixiviant is added to a <br />minimum of IOOg of solids at a maximum 9.5 mm (3/a") feed size to achieve a ]ti:l <br />solution to solids ratio. The slurry is rolled in a bottle for 24 hours and the slurry pH is <br />maintained at pH 5.0 the attire 24 hour test duratirnt. Hnrimntal or end-over-end <br />(LfUL) rolling is appropriate. After 24 hours, the slurry is filtered or decanted to <br />separate ligttitls and solids. h'iltrate is filtercJ through x U.4Sµm filter apparatus to <br />produce art extract. "fhc cxtraclis then appropriately preserved for various constituent <br />analyses (metals, analytes, organics). Residual moisture content of the filtered solids is <br />usually determined. Fur mining waste, usually only the g RCRA metals are analyzed fur. <br />When the test is used to evaluate municipal wastes, volatile and non-volatile organic <br />constituents aro analyzed fur. When used xs x moats mobility test, some states require <br />extract analyses for :dl constituents on the F.T'A primary and secondary drinking water <br />sutndard. Analytical detection limits must be eyutd to or Icss than primary and <br />secondary drinking water maximum amtaminant levels (MCL). 7-he )rpA regulatory <br />• level fur classification as a hararduus wvce is 1W times the respective MCL. <br />'f'CLY f1311,~ <br />The TCI.P procedure is essentially the same as method 1310, except that the Lixiviant pH <br />must be adjusted ut pH 4.9 (acetic acid), but does not have w be maintained during <br />extraction. The solution to solids ratio is higher at 20:1. 8nd-over-end (E08) rolling a[ <br />3U RPM is specified, and the extraction duration is decreased to 18 hours. By definition, <br />an extract is produced if filtered through a U.t. to U.Rµm filter apparatus. <br />'Ihe SPLP was designed specifically as a metals mobility test an[I is nearly identical to <br />waltod 1311 accept Cor tttc acid combioation used to tuljust Lixiviant pH. A combination <br />of H2s04 and HNO~ (Gp vnl r% 1i2SO4, 40% HN03) is added to the '1'ypc lI water to <br />adjust pH to S.U. 'the advantage for this acid wmbination is more realistic lead mobility <br />data. <br />• M.C'I,IiL1.ANU LAIiC)RA'tY)ftiliS, 1NC'. <br />