The project clause describes excavation to 3 feet (36 inches) below finished grade along column line 18 for a utility tie-in, but does not indicate that fencing has been provided around the excavation area. Per the local amendment adding Section 3304.3, excavation exceeding 30 inches in depth must meet guard requirements per Chapters 10 and 16, and any excavation within 5 feet of a walkway must be fenced with fencing at least 4 feet high, supported against wind collapse. Since the excavation depth (36 inches) exceeds the 30-inch threshold, the clause fails to address these fencing/guard requirements, creating a potential conflict if the trench is near a walkway and unfenced.
The project clause specifies a minimum residual pressure of 65 psi at the topmost outlet of the standpipe riser. Per code 905.2.4, where the pressure at nozzles is more than 65 psi, a pressure reducing device or disk must be installed to limit the force of the hose stream to 90 pounds so it can be safely handled. Since the project clause sets the residual pressure exactly at the 65 psi threshold, it must be verified that no downstream nozzle pressure exceeds 65 psi (accounting for hose/nozzle losses), or pressure-reducing devices must be provided at the 1.5-inch hose valves as required by 905.2.4. As written, the clause does not address this requirement and could result in nozzle pressures at or above the 65 psi threshold without the mandated pressure-reducing device.