Large glycol dehydration unit
Large glycol dehydration unit means a glycol dehydration unit with an actual annual average natural gas flowrate equal to or greater than 85 thousand standard cubic meters per day and actual annual average benzene emissions equal to or greater than 0.90 Mg/yr, determined according to 63.772(b). A glycol dehydration unit complying with the 0.9 Mg/yr control option under 63.765(b)(1)(ii) is considered to be a large dehydrator.