Specifications include, but are not limited to: 1.1 Vendor shall be responsible for the collection of scrap metal such as, but not limited to: brass, copper, steel, aluminum, cast, pot metal at multiple locations identified by the City of Fort Worth. 1.2 Vendor shall be responsible for the sale of various scrap metal and mixed-metal materials collected from the City of Fort Worth according to varying timeframes: (1) monthly pickup, (2) on-call pickup requiring 48 hour response, and (3) emergency pickup requiring 24 hour response. 1.3 The collection and purchase of metal materials shall be established on the best available market price based on the American Metal Market Publication (AMM) published by American Metal Market LLC, Houston Prices, low side, at or plus percent (%) , a preestablished weighing and accounting method.