Closed building conditions
12 hours before the test starts, and during the testing period, all windows and doors in the entire home must be kept closed, except for normal entrance and exit through the doors. Heating and central air systems may be used, but not room air conditioners, attic fans, fireplaces, or wood stoves.
Step 1
Remove the white screw cap from the LS vial.
Note: Save the cap to be returned to the vial upon test completion.
Step 2
Place LS vial, open side up in the testing location.
Step 3
Repeat Step 1 for duplicate LS vial (if applicable).
Step 4
Place duplicate LS vial open side up in the testing location 4 inches from main LS vial. (if applicable)
Step 5
Record the test start date and time on the reverse page.
Step 6
Expose vial(s) for a minimum of 48 hours and a maximum of 96 hours.
Step 7
Replace the white screw cap and ensure cap is tightened.
Step 8
Record the test end date and time on the reverse page.
Step 9
Ensure the chain of custody information on the reverse page has been completed.
Step 10
Place the LS vial in the mailing envelope. Mail within one (1) day.
NOTE: LS vial(s) must be received by the laboratory no later than 168 hours (approx. 7 days) after test completion.