Laserfiche WebLink
protected as detailed in Article 3.1, PROTECTION OF EXPOSED <br /> SURFACES, of this Section. In addition, the Coarse Gravel shall be <br /> protected from any contamination that reduces the hydraulic conductivity. <br /> Any contaminated material shall be removed and replaced at no cost to the <br /> OWNER. <br /> 3.9 CONSTRUCTION OF GRANULAR DRAINAGE MATERIAL <br /> A. General Requirements: <br /> 1. GDM shall be placed in the gravel logs as shown on the Construction <br /> Drawings or as required by the DESIGN ENGINEER. <br /> B. Granular Drainage Material Placement: <br /> 1. The geomembrane lining underlying the GDM layer shall be inspected and <br /> approved by the QA/QC CONSULTANT prior to placement of the GDM. <br /> 2 Method of dumping and spreading materials shall ensure uniform <br /> distribution of the material and prevent damage to the underlying <br /> geomembrane lining. <br /> 3. The EARTHWORK CONTRACTOR shall use low ground pressure <br /> equipment to place the granular drainage material. The following table shall <br /> be complied with during construction: <br /> Maximum <br /> Equipment Ground Pressure Initial Lift Thickness <br /> (psi) (ft) <br /> <5 0.5 <br /> 5 1.0 <br /> 10 1.5 <br /> 20 2.0 <br /> >20 >3.0 <br /> 4. EARTHWORK CONTRACTOR is responsible for repairing any <br /> geomembrane lining material damaged during GDM placement at no cost to <br /> the OWNER. <br /> C. Quality Control: <br /> 1. General: As the GDM is being placed, the QA/QC CONSULTANT will be <br /> monitoring the construction activities and soil properties. If tests conducted <br /> by the QA/QC CONSULTANT indicate that the GDM does not meet <br /> specified requirements, the EARTHWORK CONTRACTOR shall <br /> terminate material placement until corrective measures are taken. <br /> Forward Compost Facility Stormwater Improvements <br /> 02300 12 EARTHWORK <br />