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Method TO-10A Pesticides/PCBs <br /> TABLE 4. SAMPLING EFFICIENCIES FOR SOME SEMI-VOLATILE <br /> ORGANOCHLORINE COMPOUNDS AND PCBs <br /> Quantity Sam ling efficiency, <br /> Compound Introduced,,ug' mean RSD n <br /> 1,2,3-Trichlorobenzene 1.0 6.62 22 8 <br /> 1,2,3,4-Tetrachlorobenzene 1.0 62.32 33 5 <br /> Pentachlorobenzene 1.0 94.0 12 5 <br /> Hexachlorobenzene 0.5, 1.0 94.5 8 5 <br /> Hexachlorocyclopentadiene 1.0 8.32 12 5 <br /> 2,4,5-Trichlorophenol 1.0 108 3 5 <br /> Pentachlorophenol 1.0 107 16 5 <br /> Aroclor 1242 0.1 96.0 15 6 <br /> Aroclor 1254 0.1 95.0 7 6 <br /> Aroclor 1260 0.1 109 5 11 <br /> 'Air volume=0.9 m3. <br /> 2% SEs were 98,and 97%(n=2),respectively,for these three compounds by the PUF/Tenax®TA <br /> "sandwich"trap. <br /> Page 10A-22 Compendium of Methodsjor Toxic Organic Air Pollutants January 1999 <br />