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1 , V <br /> , 1 r <br /> Section No ' 6 ` ' 1 <br /> ` Revision No 0 <br /> Data September 5, 1941 <br /> Pate 13 of, 55 <br /> 1 r i <br /> , <br /> ■ �, Teflon tubing will be replaced 4 <br /> h + i <br /> 3 <br /> I , <br /> 6 3 5 Sample Collection` <br /> 6 3 5 1 Integrated,Air 'Sampling System - Integrated air sampling wi'll <br /> i <br /> be utilized to assess impacts on ambient air quality, characterize emissions <br /> from a source, or evaluate air r quality in confined 'spaces For integrated <br /> air sampling, the following flow path' will be established A 'positive <br /> pressure gradient between the specified sample source and sample container <br /> - -- <br /> 1 -7 <br /> will be induced by means of a Teflon- or Viton-lined diaphragm pump Air <br /> flow to the, pump inlet,,will be unrestricted in an are greater` than 270 <br /> degrees with the predominant wind direction , and away from wake-inducing <br /> obstructions 'such' as'trees, shrubbery and=buildings Air, flow from the pump <br /> - - - - - r - ' _ '` �-_ - _ _ -� s - - _ _ I }�r <br /> outlet will be discharged exclusively through' Vi on, Teflon,_or stainless <br /> steel materials air flow will befconurolled ,and measured downstream of the <br /> ' I <br /> pump using a constant upstream variable flow controller and -a by <br /> , variable-area flowmeter, respectively' Subsequent to downstream- air flow r <br /> control, air flow, will be discharged, to an appropriate sample, container <br /> specified in, the sampling and analysis plan <br /> - 1 P'fior to collecting-gas samples for laboratory'analy'sis, the- sampling ' <br /> apparatus will be purged o`f stagnant gases according to the following <br /> 1 <br /> procedures ; <br /> w Set up sampling apparatus in accordance with ',specific testing <br /> methodology 'except without sample container, <br /> ` <br /> , e <br /> „ 1 <br /> ■ Estimate internal gas volume of sampling apparatus, <br /> 6-13 <br /> I, � <br />