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• GETTLER-RYAN INC, <br /> FIELD METHODS AND PROCEDURES <br /> VES Vapor Stream Sample Collection <br /> Influent and effluent vapor stream samples are collected by connecting the sample bag to <br /> the sampling port via clean tygon tubing The sample bag is then placed inside the air <br /> sampling container, which is attached to an air pump, To obtain a sample from the VES <br /> vapor stream, the air pump is activated, inducing a vacuum inside the sample container <br /> The induced vacuum allows the sample bag to inflate by drawing an air sample from the <br /> VES vapor stream via the sample port and tubing Once the sample bag is full, it is placed <br /> in a separate container to protect it from sunlight, and delivered to the laboratory for <br /> analysis <br /> • <br />