For Springwood Village HC Improvement District No. 18, WETS provided two GST water ventilation systems to reduce methane to safe levels in the vapor space of a new GST. Methane gas is an explosive gas with a lower explosive limit (LEL) of 5% when combined with air. Methane gas and other volatile gas is produced from Springwood Village HC Improvement District 18 Well. The forced draft GST ventilation system dilutes the methane gas content by introducing the air from the blower. The mixture of methane gas and air reduces the methane content significantly below the LEL.
Methane is a very volatile gas and easily separates from water. Methane gas once disengaged from water, accumulates in the top of the ground storage tank and creates a potential explosive hazard. Two positive ventilation systems providing 12,000 cfm of air by blower were installed at the top of the concrete GST. A vent is provided at the center. The blower is designed to run when the well comes on and to continue to run for approximately five minutes after the well has shut down. Sensors in the control panel sound the alarm if the blower fails to run while the well is in operation.
Client : HC improvement 18 WP# 1 – Houston, TX
Year : 2020
Category : Aerator