Engine 53 made the response with a crew of 6 to assist Norco Fire Co. in North Coventry Twp, Chester County on the multi-alarm apartment building fire this evening.  Chester County DPS requested additional apparatus from Delaware County, including 3 Engines and 1 Tanker due to water supply issues at the scene.  Engine 53 remained on scene for approximately 4.5 hours before returning to Marple Twp.  Additional crews remained back at Station 53 to cover our local while the Engine was on the extended assignment.