1998-03-23_REVISION - M1977348 - Laserfiche WebLink

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5.4.3 Extraction fluid p3: This fluid is reagent water (Step 5.2) and is used to determine cyanide and volatiles leachability. NOTE: These extraction fluids should be monitored frequently for impurities. The pH should be checked prior to use to ensure that these fluid; are made up accurately. If impurities are found or the pH is not within the above specifications, the fluid shall be discarded and fresh extraction fluid prepared. 5.5 Analytical standards shall be prepared according to the appropriate ' analytical method. 6.0 SAMPLE COLLECTION, PRESERVATION, AND HANDLING ' _ 6.1 All samples shall be collected using an appropriate sampling plan. I 6.2 There may be requirements on the minimal size of the field sample - depending upon the physical state or states of the waste and the analytes of concern. An aliquot is needed for the preliminary evaluations of the percent solids and the particle size. An aliquot may be needed to conduct the ' nonvolatile analyte extraction procedure (see Step 1.4 concerning the use of this extract far volatile organics). If volatile organics are of concern, another aliquot may be needed. Quality control measures may require additional ;aliquots. Further, it is always wise to collect more sample just in case something goes wrong with the initial attempt to conduct the test. ' 6.3 Preservatives shall not be added to samples before extra~:tion. 6.4 Samples may be refrigerated unless refrigeration re:;ults in irreversible physical change to the waste. If precipitation occurs, the entire ' sample (including precipitate) should be extracted. 6.5 When the sample is to be evaluated for volatile analytes, care shall be taken to minimize the loss of volatiles. Samples shall be collected and stored in a manner intended to prevent the loss of volatile analytes ( a , samples should be collected in Teflon-lined septum capped vials and stored at 4°C. Samples should be opened only immediately prior to extraction). 6.6 1312 extracts should be prepared for analysis and analyzed as soon ' as possible following extraction. Extracts or portions of extracts for metallic analyte determinations must be acidified with nitric acid to a pH < 2, unless precipitation occurs (see Step 1.2.14 if precipitation occurs). Extracts should be preserved for other analytes according to the guidance given in the individual analysis methods. Extracts or portions of extracts for organic analyte determinations shall not be allowed to come into contact with the atmosphere (i.e., no headspace) to prevent losses. See Section 8.0 (Quality Control) far ' acceptable sample and extract holding times. 7.0 PROCEDURE ' 7.1 Preliminary Evaluations 1312 - 6 Revi:>ion 0 November 1990