EPA Method 305 Measurement Of Emission Potential Of Individual Volatile Organic Compounds In Waste
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ID： |
0D70A1C183FD498B83C0B2006ECB456C |
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文件大小(MB)： |
0.25 |
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页数： |
24 |
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文件格式： |
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日期： |
2000-2-12 |
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购买： |
文本摘录（文本识别可能有误，但文件阅览显示及打印正常，pdf文件可进行文字搜索定位）：
2052,METHOD 305: MEASUREMENT OF EMISSION POTENTIAL OF,INDIVIDUAL VOLATILE ORGANIC COMPOUNDS IN WASTE,NOTE: This method does not include all of the,specifications (e.g., equipment and supplies) and procedures,(e.g., sampling and analytical) essential to its,performance. Some material is incorporated by reference,from other methods in 40 CFR Part 60, Appendix A.,Therefore, to obtain reliable results, persons using this,method should have a thorough knowledge of at least Method,25D.,1.0 Scope and Application.,1.1 Analyte. Volatile Organics. No CAS No.,assigned.,1.2 Applicability. This procedure is used to,determine the emission potential of individual volatile,organics (VOs) in waste.,1.3 Data Quality Objectives. Adherence to the,requirements of this method will enhance the quality of the,data obtained from air pollutant sampling methods.,2.0 Summary of Method.,2.1 The heated purge conditions established by,Method 25D (40 CFR Part 60, Appendix A) are used to remove,VOs from a 10 gram sample of waste suspended in a 50/50,solution of polyethylene glycol (PEG) and water. The purged,2053,VOs are quantified by using the sample collection and,analytical techniques (e.g. gas chromatography) appropriate,for the VOs present in the waste. The recovery efficiency,of the sample collection and analytical technique is,determined for each waste matrix. A correction factor is,determined for each compound (if acceptable recovery,criteria requirements are met of 70 to 130 percent recovery,for every target compound), and the measured waste,concentration is corrected with the correction factor for,each compound. A minimum of three replicate waste samples,shall be analyzed.,3.0 Definitions. [Reserved],4.0 Interferences. [Reserved],5.0 Safety.,5.1 Disclaimer. This method may involve hazardous,materials, operations, and equipment. This test method may,not address all of the safety problems associated with its,use. It is the responsibility of the user of this test,method to establish appropriate safety and health practices,and to determine the applicability of regulatory limitations,prior to performing this test method.,6.0 Equipment and Supplies.,6.1 Method 25D Purge Apparatus.,2054,6.1.1 Purge Chamber. The purge chamber shall,accommodate the 10 gram sample of waste suspended in a,matrix of 50 mL of PEG and 50 mL of deionized, hydrocarbonfree,water. Three fittings are used on the glass chamber,top. Two #7 Ace-threads are used for the purge gas inlet,and outlet connections. A #50 Ace-thread is used to connect,the top of the chamber to the base (see Figure 305-1). The,base of the chamber has a side-arm equipped with a #22,Sovirel fitting to allow for easy sample introductions into,the chamber. The dimensions of the chamber are shown in,Figure 305-1.,6.1.2 Flow Distribution Device (FDD). The FDD,enhances the gas-to-liquid contact for improved purging,efficiency. The FDD is a 6 mm OD (0.2 in) by 30 cm (12 in),long glass tube equipped with four arm bubblers as shown in,Figure,305-1. Each arm shall have an opening of 1 mm (0.04 in) in,diameter.,6.1.3 Coalescing Filter. The coalescing filter,serves to discourage aerosol formation of sample gas once it,leaves the purge chamber. The glass filter has a fritted,disc mounted 10 cm (3.9 in) from the bottom. Two #7 Acethreads,are used for the inlet and outlet connections. The,dimensions of the chamber are shown in Figure 305-2.,2055,6.1.4 Oven. A forced convection airflow oven capable,of maintaining the purge chamber and coalescing filter at 75,± 2EC (167 ± 3.6EF).,6.1.5 Toggle Valve. An on/off valve constructed from,brass or stainless steel rated to 100 psig. This valve is,placed in line between the purge nitrogen source and the,flow controller.,6.1.6 Flow Controller. High-quality stainless steel,flow controller capable of restricting a flow of nitrogen to,6 ± 0.06 L/min (0.2 ± 0.002 ft3/min) at 40 psig.,6.1.7 Polyethylene Glycol Cleaning System.,6.1.7.1 Round-Bottom Flask. One liter, three-neck,glass round-bottom flask for cleaning PEG. Standard taper,24/40 joints are mounted on each neck.,6.1.7.2 Heating Mantle. Capable of heating contents,of the 1-L flask to 120 EC (248 EF).,6.1.7.3 Nitrogen Bubbler. Teflon?or glass tube,0.25 in OD (6.35 mm).,6.1.7.4 Temperature Sensor. Partial immersion glass,thermometer.,6.1.7.5 Hose Adapter. Glass with 24/40 standard,tapered joint.,6.2 Volatile Organic Recovery System.,2056,6.2.1 Splitter Valve (Optional). Stainless steel,cross-pattern valve capable of splitting nominal flow rates,from the purge flow of 6 L/min (0.2 ft3/min). The valve,shall be maintained at 75 + 2EC (167 ± 3.6EF) in the heated,zone and shall be placed dow……
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