The company’s mother station is located on Bangbuatong-Bangpa-in road, Bangkrabue sub-district, Samkok district, Patum Thani, on a 33,106 square meter-land, and is owned by the company. The compression capacity is approximately 643 tonnes per day. The station operates every day. There is a refill station with 30 slots for transfer vehicles. 30 vehicles can refill natural gas at the same time. The station operates 24 hours a day. The revenue generated from natural gas compression, according to the Compression Contract, equals the sum of Availability Payment (AP) and Energy Payment (EP). AP is the compensation for investment expenses and is calculated per compressed natural gas weight in kg with a flat rate. EP is the operating cost which depends on the electricity cost, the US dollar exchange rate, and the consumer price index in Thailand. Every year, the EP changes with the variables mentioned.