250701_42 ERW_Stormwater Report

StormTech MC-3500 Chamber ® Designed to meet the most stringent industry performance standards for superior structural integrity while providing designers with a cost-effective method to save valuable land and protect water resources. The StormTech system is designed primarily to be used under parking lots, thus maximizing land usage for private (commercial) and public applications. StormTech chambers can also be used in conjunction with Green Infrastructure, thus enhancing the performance and extending the service life of these practices. Nominal Chamber Specifications Nominal End Cap Specifications (not to scale) (not to scale) Size (L x W x H) 90” x 77” x 45” 2286 mm x 1956 mm x 1143 mm Chamber Storage 109.9 ft3 (3.11 m3) Min. Installed Storage* 175.0 ft3 (4.96 m3) Weight 134 lbs (60.8 kg) Size (L x W x H) 26.5” x 71” x 45.1” 673 mm x 1803 mm x 1145 mm End Cap Storage 14.9 ft3 (0.42 m3) Min. Installed Storage* 45.1 ft3 (1.28 m3) Weight 49 lbs (22.2 kg) *Assumes a minimum of 12” (300 mm) of stone above, 9” (230 mm) of stone below, 6” (150 mm) of stone perimeter, 6” (150 mm) of stone between chambers/ end caps and 40% stone porosity. Shipping 15 chambers/pallet 7 end caps/pallet 7 pallets/truck *Assumes a minimum of 12” (300 mm) of stone above, 9” (230 mm) of stone below chambers, 6” (150 mm) of stone between chambers/ end caps and 40% stone porosity. EMBEDMENT STONE SHALL BE A CLEAN, CRUSHED AND ANGULAR STONE WITH AN AASHTO M43 DESIGNATION BETWEEN #3 AND #4 GRANULAR WELL-GRADED SOIL/AGGREGATE MIXTURES, <35% FINES, COMPACT IN 12" (300 mm) MAX LIFTS TO 95% PROCTOR DENSITY. SEE THE TABLE OF ACCEPTABLE FILL MATERIALS. CHAMBERS SHALL MEET ASTM F2418 "STANDARD SPECIFICATION FOR POLYPROPLENE (PP) CORRUGATED WALL STORMWATER COLLECTION CHAMBERS". CHAMBERS SHALL BE BE DESIGNED IN ACCORDANCE WITH ASTM F2787 "STANDARD PRACTICE FOR STRUCTURAL DESIGN OF THERMOPLASTIC CORRUGATED WALL STORMWATER COLLECTION CHAMBERS". ADS GEOSYTHETICS 601T NON-WOVEN GEOTEXTILE ALL AROUND CLEAN, CRUSHED, ANGULAR EMBEDMENT STONE PAVEMENT LAYER (DESIGNED BY SITE DESIGN ENGINEER) 18" (450 mm) MIN* PERIMETER STONE 12" (300 mm) MIN EXCAVATION WALL (CAN BE SLOPED OR VERTICAL) 8' (2.4 m) MAX 45" (1140 mm) DEPTH OF STONE TO BE DETERMINED BY SITE DESIGN ENGINEER 9" (230 mm) MIN 6" (150 mm) MIN MC-3500 END CAP 6" (150 mm) MIN 77" (1950 mm) SITE DESIGN ENGINEER IS RESPONSIBLE FOR

m) MAX 45" (1140 mm) DEPTH OF STONE TO BE DETERMINED BY SITE DESIGN ENGINEER 9" (230 mm) MIN 6" (150 mm) MIN MC-3500 END CAP 6" (150 mm) MIN 77" (1950 mm) SITE DESIGN ENGINEER IS RESPONSIBLE FOR ENSURING THE REQUIRED BEARING CAPACITY OF SOILS *MINIMUM COVER TO BOTTOM OF FLEXIBLE PAVEMENT. FOR UNPAVED INSTALLATIONS WHERE RUTTING FROM VEHICLES MAY OCCUR, INCREASE COVER TO 24" (600 mm). 12" (300 mm) TYP