 Stage
I Vapor Recovery, how do I comply?
Many areas around the nation now require annual testing for stage I vapor recovery systems installed on aboveground storage tanks. California, New York and Massachusetts all are among the states that now have laws that mandate testing. Many other states are considering adopting these same mandates. Compliance with these tests requires at a minimum the use of a 3/8 W.C. pressure vacuum vent cap. This vent cap contains an internal pressure valve set at 3" water column and a vacuum setting that does not exceed an 8" water column. The cap assures even pressure in your AST during filling and/or pumping. You can identify this cap by looking for a yellow band around the vent cap with the numbers 3/8 on it. Mandatory testing in certain areas of Mass, NY and California ranges from annually to once every five years. Contact your local Fire Marshall authorities to find out if Stage 1 Vapor recovery is required in your distric
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