C2 The concentration of the contaminant of concern in the second phase (mg/L). 9.16 The contaminant concentrations in the TCLP extract are compared with the thresholds identified in the appropriate regulations. Refer to Section 10.0 for qualify assurance requirements. 10.0 QUALITY ASSURANCE REQUIREMENTS 10.1 All data, including quality assurance data, should be maintained and available for reference or inspection. 10.2 A minimum of one blank (extraction fluid #1) for every 10 extractions that have been conducted in an extraction vessel shall be employed as a check to determine if any memory effects from the extraction equipment are occurring. 10.3 For each analytical batch (up to twenty samples), it is recommended that a matrix spike be performed. Addition of matrix spikes should occur once the TCLP extract has been generated (i.e., should not occur prior to performance of the TCLP procedure). The purpose of the matrix spike is to monitor the adequacy of the analytical methods used on the TCLP extract and for determining if matrix interferences exist in analyte detection. 10.4 All quality control measures described in the appropriate analytical methods shall be followed. 10.5 The method of standard addition shall be employed for each analyte if: 1) recovery of the compound from the TCLP extract is not between 50 and 150%, or 2) if the concentration of the constituent measured in the extract is within 20% of the appropriate regulatory threshold. If more than one extraction is being run on samples of the same waste (up to twently samples), the method of standard addition need be applied only once and the percent recoveries applied to the remainder of the extractions. 10.6 Samples must undergo TCLP extraction within the following time period after sample receipt: Volatiles, 14 days; Semi-Volatiles, 40 days; Mercury, 28 days; and other Metals, 180 days. Extraction of the solid portion of the waste should be initiated as Company TABLE 3-SUITABLE ZERO-HEADSPACE EXTRACTOR VESSELS Location Model No. 3740-ZHB, Gas Pressure Device. SD1 P581 C5, Gas Pressure Device. CI02, Mechanical Pressure Device. 1 Any device capable of separating the liquid from the solid phase of the waste is suitable, providing that it is chemically compatible with the waste and the constituents to be analyzed. Plastic devices (not listed above) may be used when only inorganic contaminants are of concern. The 142 mm size filter holder is recommended. |