All brake systems default to manual function when something goes haywire with the electronic enhancements, which is why the brakes seem to work just fine. Slam on the brakes hard and I bet they lock up, which is not what should happen. More From Popular Mechanics. The likely culprit is one of the ABS wheel-speed sensors, a pinky-size part that detects the teeth of the tone ring.
Unless you are recording actual release detection results at least every 30 days and maintaining records for at least 5 years, you are not doing leak detection.  Keep all records of calibration, maintenance, and repair of your release detection equipment for at least 5 years.eep These O&M Records  Keep your manual tank gauging records for at least 5 years. Unless you are recording actual release detection results at least weekly and every 30 days and maintaining records for at least 5 years, you are not doing leak detection right.
Keep records for 3 years from the date you filed your original return or 2 years from the date you paid the tax, whichever is later, if you file a claim for credit or refund after you file your return. Keep records for 7 years if you file a claim for a loss from worthless securities or bad debt deduction. Keep records for 6 years if you do not report income that you should report, and it is more than 25% of the gross income shown on your return. Keep records indefinitely if you do not file a return.