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STANDARD OPERATING PROCEDURES SOP: 1704 Y_, """""3 PAGE: 4 of 11 !> REV: 1.0 S E R AS EFFECTIVE DATE: 11/16/15 SUMMA CANISTER SAMPLING 1. With a 9/16"wrench,remove the brass fitting from the top of the canister. 2. Attach the vacuum gauge to the canister and open the canister valve. 3. Verify and record the "Initial" reading of the evacuated SUMMA canister. The evacuate canister should read no more than-29.5 inches(")of mercury. 4. Ensure that the canister valve is fully closed before removing the vacuum gauge. 5. Place the SUMMA canister in desired location.If sampling from a vapor stream,connect inert tubing t�j canister sampling port. 6. Open sampling valve by turning knob counter clockwise until the knob moves easily. 7. An audible "hiss" may indicate that sampling has initiated. When the hissing stops,close valve and replace cap. Sample duration should be approximately 10 to 30 seconds. 8. Document sample collection information on the Air Sampling Worksheet(Appendix B) 7.2 Time-Weighted Average Collection This technique may be used to collect time-integrated samples (duration of 1 to 24 hours). Theme I sampling duration depends on the degree to which the flow is restricted. \� 1. With a 9/16"wrench,remove the brass fitting from the top of the canister. 2. Attach the vacuum gauge to the canister and open the canister valve. 3. Verify and record the "Initial" reading of the evacuated SUMMA canister. The evacuate canister should read no more than-29.5 "of mercury. 4. Ensure that the canister valve is fully closed before removing the vacuum gauge. 5. Check the flow rate of the orifice using a certified flow meter or a rotameter that has been checked against the primary flow meter. (3 6. Attach the flow controller to the top of the canister. Start the fitting by hand to avoid cross threading,then tighten firmly with a 9/16"wrench. 7. Open the valve on the canister counter clockwise and record the"start'time. 8. Monitor sampling progress periodically. 9. At the end of the sampling period, close the valve on the canister by turning clockwise unti hand tight. Record the"end"time.While the ideal reading on the can gauge should be slightly z) negative,the actual can pressure will be tested with a calibrated gauge at the laboratory. 10. Remove the flow controller and put it into its appropriate shipping container.