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PART 4 - MEASUREMENT AND PAYMENT <br />Measurement for payment for the slurry wall shall be based on the area in square feet as calculated by <br />"one-time" multiplication of the depth of the slurry wall by the horizontal length as constructed in place <br />unless over-constructed at Contractor's discretion then design quantities will apply. The length of slurry wall <br />will be as shown on the Plans or as modified and approved by the Owner/Engineer. Measurement will be <br />done jointly by both the Contractor and the Owner/Engineer. The depth of slurry wall shall be as measured <br />on a vertical profile through the centerline of the slurry trenches within the boundaries established, by the <br />top of the as constructed temporary working surfaces, as described in Sub-Section 3.01, Temporary <br />Working Surface Preparation, and the bottom of the excavated trenches. Measurements will be based on <br />surveys and soundings taken at the site as directed and approved by the Owner/Engineer. <br />Measurement for payment of any Off-Site Disposal of Excess Slurry shall be based on the actual volume in <br />gallons of excess slurry disposed of at an approved off-site disposal facility as determined from the disposal <br />receipts. <br />Measurement for payment of Off-Site Materials for Slurry Wall Backfill shall be based on the computed tons <br />of approved materials as determined from the total weight shown on the supplier's tickets. <br />Payment for slurry wall will be made at the unit price for Slurry Wall. The unit price shall include the costs of <br />all materials, equipment, labor and expertise for the construction of slurry wall in accordance the <br />Specifications, Drawings, or as directed by the Owner/Engineer. <br />Payment for off-site materials for slurry wall backfill will be made at the unit price for Off-Site Materials for <br />Slurry Wall Backfill. The unit price shall include all equipment, labor, material and expertise required for <br />furnishing off-site materials in accordance with the Drawings, Specifications, or as directed by the <br />Owner/Engineer. The completed Work will be paid for at the contract unit price for the following: <br />Pay Item Pay Unit <br />Working Platform Lump Sum <br />Slurry Wall Square Foot <br />Onsite Materials for Slurry Wall Backfill Ton <br />Off-Site Disposal of Excess Slurry Gallon <br />On-Site Disposal of Excess Slurry Lump Sum