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I <br /> 1. Lean concrete as specified in Section 31 23 24, Flowable Fill,with compressive strength <br /> of 100 psi. <br /> 2. Structural concrete as specified in Section 03 11 00, Concrete Work with compressive <br /> strength of 3,000 psi. <br /> D. Drain Rock: Coarse Aggregate Type A2,Granular Drain Backfill Material with gradation as <br /> shown in the Drawings and specified in Section 31 05 16,Aggregates for Earthwork. <br /> E. Sand: As specified in Section 31 05 16,Aggregates for Earthwork. <br /> F. Trench Stabilization Material: Coarse Aggregate Type Al, Dense-Graded Aggregate, 2-1/2"- <br /> I0 gradation as specified in Section 31 05 16,Aggregates for Earthwork. <br /> 2.2 MARKING TAPE <br /> A. Detectable: <br /> 1. Solid aluminum foil,visible on unprinted side, encased in protective high visibility, inert <br /> polyethylene plastic jacket. <br /> 2. Foil Thickness: Minimum 0.35 mils. <br /> 3. Laminate Thickness: Minimum 5 mils. <br /> 4. Width: 6 inches. <br /> 5. Identifying Lettering: Minimum 1-inch high,permanent black lettering imprinted <br /> continuously over entire length. <br /> 6. Joining Clips: Tin or nickel-coated furnished by tape manufacturer. <br /> 7. Manufacturers and Products: <br /> a. Reef Industries; Terra Tape, Sentry Line Detectable. <br /> b. Mutual Industries; Detectable Tape. <br /> c. Presco; Detectable Tape. <br /> B. Color: In accordance with APWA Uniform Color Code for Temporary Marking of <br /> Underground Facilities and as specified in NEMA Z535.1, Safety Color Code. <br /> Color Facility <br /> Red Electric power lines,cables, conduit, and lightning cables <br /> Orange Communicating alarm or signal lines, cables, or conduit <br /> Yellow Gas, oil, steam, petroleum, or gaseous materials <br /> Green Sewers and drain lines <br /> Blue Potable water <br /> Purple Reclaimed water,irrigation, and slurry lines _ <br /> I <br /> Legion Golf Course Stormwater Detention Project Trenching <br /> WO#UP3620 31 23 17 - 5 <br />