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HomeMy WebLinkAboutC_PSE_Electrical_Response_Email_250108_v1 From: Flores, David <David.Flores@pse.com> Sent: Monday, October 21, 2024 4:56 PM To: pcthumann@hotmail.com Subject: 13411 SE 151ST ST, ADU, Renton Gas Project Jamie, The gas meter will need to be 3 feet away from any features on the outside of the house such as electric meters, outlets, windows, vents, heat pumps, switches, communication boxes, spigots, etc. If you are doing the on-property digging, you will have to dig from the property line to the meter location. I always recommend installing yellow schedule 40 PVC conduit as opposed to doing open trenching. If we keep the entirety of the service, from the gas main to the meter, under 180 feet then you would be able to use 2 inch yellow schedule 40 PVC conduit. If we exceed that distance then you will need 4” yellow schedule 40 conduit. If you do open trenching then you have to supply enough sand to bed the pipe with 4 inches on bottom and 6 inches on top for the entirety of the gas service line and you have to have the trenches open for a while. This would be a lot of sand needed for an entire run of open trench. The conduit would run from the property line to the meter location. Once I see the conduit in the ground you can bury it, either leaving the pits at the ends or covering those up until it is time to schedule the installation. If you decide to go with conduit, it would need to be buried 24 inches from the grade of the ground to the top of the pipe for the 2 inch conduit, or 30 inches from the grade of the ground to the top of the pipe if we are using 4 inch conduit. If you go with conduit, there is no need for sand except for at the ends, where you would need ½ yard of sand bags nearby at each when it is time to schedule the installation. The conduit will need to have a pull rope inserted through it, and though the diagram below says 3/8” pull rope, I always recommend using mule tape (shown in the third picture below). The conduit would need to have 1 foot of horizontal separation from any other underground utility and structure (catch basin, building foundation, vault, building footing, etc). We cannot have any stacking of utilities under or on top of the gas conduit. Again, I would need to see the conduit in the ground before you bury it to make sure that it meets the standards, in order to prevent you from having to dig it back up later if it does not meet our standards. Below are examples of what the trenches at each end would need to look like, after I have inspected the conduit and you have buried the majority of it. Please send me a site plan or a sketch of the site layout that shows your preferred meter location and service route, along with a list of the gas-using appliances and their associated BTU loads that will be going into this ADU. Thank you. Respectfully, Dave Flores Project Manager III C&SP – SKC Puget Sound Energy O: (253) 395-6320 C: (425) 449-6019 6905 South 228th St Kent, WA 98032 http://pse.com