COMPLIANCE INFO 2001 - 2009 - Laserfiche WebLink

Home Browse Search

SNP-104-601 �Sprint, Network Practices (LDD) 11/7/01 5. Monitoring and Leak Detection Underground and aboveground storage tanks hold diesel fuel, which is required for emergency generator operation. Maintaining a sufficient quantity of fuel to power the site during commercial power outages is critical to the reliability of the network. Ensuring that the fuel does not leak from the tank or associated piping and contaminate the soil is critical from an environmental standpoint. Sprint considers these issues important enough to warrant the installation of a continuous monitoring system. 5.1 Piping Monitoring 5.1.1 Underground: The possibility of a piping leak is remote. However, Sprint employs double-walled suction piping that is sloped so that the piping contents drain back into the storage tank if the suction is released. The double-walled piping terminates into a piping sump at the UST for monitoring purposes. A discriminatory sensor or float-switch is installed in the sump to detect piping leaks. This sensor detects differences between fuel and any other liquid, such as water. Some facilities may have a non- discriminatory sensor installed. In that case, sumps with this sensor must be checked for the actual presence of fuel at any time an alarm appears. Leak detection is not required on suction piping systems that have below-grade piping that is sloped so that the piping contents drains back into the storage tank if the suction is released.This system will only have one check valve per suction line that is located directly below the suction pump. Suction piping that does not fulfill these requirements must have leak detection. EPA approved methods for piping leak detection include either a line test every three years or interstitial monitoring. However Sprint standards require all underground piping to have leak detection installed. 5.1.2 Above Ground: Where piping is exposed inside the building, at the day tank, at the generator, etc., Sprint personnel inspect for leaks once a month. 5.2 in Tank Monitoring Sprint has employed Veedor-Root, Gilbarco, or Andover Tanknet continuous monitoring systems to track UST performance and product inventory. The monitoring unit can generate on-demand and automatic inventory reports, and leak tests. Alarms monitor product theft, leak loss, low inventory level,high water, and overfill. These alarms have programmable limits,which must be set correctly for accurate results. The following products are currently in use: Veedor-Root TLS250 with Gilbarco TM4 Veedor-Root TLS250i Veedor-Root TLS350 Veedor-Root TLS300 Gilbarco TM3 Andover Tanknet Copyright 01999-2001 Sprint Corporation The information in this document is proprietary. Unauthorized disclosure of this information outside Sprint Corporation is prohibited.