A 15-inch storm drain is proposed starting from a new catch basin on Sandpiper Road, that will run underneath Seaside Avenue through a new drain manhole, then transition to a larger 24-inch storm drain, that will outlet to New Salt Road Marsh and Goosefare Brook. SEWER AND DRAIN PIPING NOTES 1. ALL STORM DRAIN INSTALLED SHALL BE CORRUGATED POLYETHYLENE PIPE. THE PIPE AND FITTINGS SHALL HAVE A SMOOTH INTERIOR AND CORRUGATED EXTERIOR AND CONFORM TO THE REQUIREMENTS OF AASHTO M252 AND AASHTO M294 OR ASTM F2648. THE PIPE JOINT SYSTEM SHALL BE WATERTIGHT (WT) AND SHALL MEET OR EXCEED THE CURRENT ASTM D3212 LAB TEST REQUIREMENTS AND THE CURRENT ASTM F1417 WATERTIGHT FIELD TEST REQUIREMENTS. 2. TRENCH INSULATION SHALL BE USED WHERE DEPTH OF COVER IS LESS THAN 5-FEET. REFER TO THE CIVIL DETAIL DRAWINGS FOR THE TRENCH INSULATION DETAIL. 3. TRENCH INSULATION SHALL BE USED WHEN THERE IS LESS THAN 2-FEET BETWEEN THE SEWER OR FORCE MAIN AND A CULVERT. REFER TO THE CIVIL DETAIL DRAWINGS FOR THE TRENCH INSULATION DETAIL.
