9421 18TH AVE W LILYS COURT 2025-07-29

• , eciturenients for Excavating and Preparing the Site ® Excavate and level the designated area. Be sure - to excavate at least one extra foot around the perk x meter to allow for proper fit and adequate compaction. +d'*+ Excavation must be free of standing water. De- watering measures must be taken if required. Positive drainage of the excavation must be maintained. Prepare the chamber bed subgrade soil as outlined in the engineer's drawings. Place AASHTO M288 Class 2 non-woven filter e - fabric over the prepared subgrade soils and up the excavated walls.Table 3 lists suitable geotextiles. Far side of bed being prepared while near side is concurrently The filter fabric must overlap at least 2 feet(610 mm) installed. where the fabric edges meet. Place AASHTO M288 Class 2 non-woven filter fabric around the perimeter of the excavated bed including the manifold system as specified in the -� engineering drawing. 0E +.za �• i , �.-F ,r NOTE:(Fabric is required over the top of the entire chamber __ . - system after the 6"(152 mm)of stone is placed over chambers.) ri Perforated pipe outlet underdrains may be designed within the one foot stone perimeter or - under the chambers with a minimum pipe crest ' to chamber foot clearance of 6 inches. Install • perforated pipe outlet underdrains as required by 'K ` 1w • the engineer's drawings. . t ° Sad Filter fabric and underdrains installed. ® Place acceptable nominal%-2"(19-51 mm) clean, crushed, angular stone foundation material over the entire bottom surface of the bed (see Tables 4&5 for stone requirements). Refer to the • engineer's drawings for subgrade soil preparation and required stone foundation thickness. Compact the stone using a vibratory roller with its full dynamic force applied to achieve a flat surface. • Call StormTech at 666.1392.z694 for technical and product information or visit www.stormtech.com 3