COMPLIANCE INFO_2023 - Laserfiche WebLink

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A = The distance from the seat surface of the upper drop tube to the bottom of the underground storage tank. The seat surface will vary depending on the type of installation. See below. Underneath Fill Adapter Underneath Bucket Inside Bucket (EBW Legacy Series) (Phil-Tite Series) (Defender Series) NOTE: If you are installing into an OPW® spill container, measure from the bottom of the tank to the top face of the OPW® seal adaptor in the OPW® spill bucket. B = FINAL SHUTOFF VOLUME HEIGHT-- According to industry recommended practices, FFS recommends that you set the final shutoff volume to a maximum of 95% of the actual tank capacity. To find the final shutoff volume height, multiply the actual tank capacity (gallons) by the final shutoff volume percentage. (If you are using 95% tank volume, multiply the actual tank capacity by .95.) You then locate the closest volume on the tank chart (provided by the tank manufacturer), and record the corresponding height for "B." ** NOTE: To accommodate tank tilt or increased/decreased usage of tank capacity, the final shutoff volume can be adjusted to a value other than 95%, providing it meets all applicable regulatory requirements, and is acceptable to the Authority Having Jurisdiction (AHJ). If the final shutoff volume is not installed at 95%, the installing contractor should document the new volume as intended and include it with the station records as reference for compliance inspections. The installing contractor can do this on the "OPV Installation Record Sheet" or any other applicable station records. If the final shutoff volume is installed greater than 95%, make sure in all cases that there is at least 250 gallons of ullage volume remaining so that "...none of the fittings located on the top of the tank are exposed to product due to overfilling" according to EPA 40 CFR Part 280.