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We will verify that the secondary product pipe slopes back to the UDC and that any leaks flow to the UDC and <br />trigger the liquid sensor. Will the secondary lines open into the UDCs? <br />2. What are you using for backfill around the UDCs and pipe? I assume the existing pea gravel will be reused. Will <br />you use additional pea gravel as necessary to meet the piping and UDC manufacturer instructions? <br />NOV / Red Thread IIA pipe install instructions <br />In all cases, the pipe must be completely surrounded with select backfill (sand, 1,;8" to 'R 4" pea gravel, or <br />crushed stone). There should not be any voids under or around the pipe. Six inches (150 mm) of the fill mu <br />the pipe as bedding material. Native backfill materials should never be used. <br />TABLE 5. Recommended Minimum Burial Depths Based on Soil Modulus of 1,000 psi o <br />(Refer to ASTM D3839 or AWWA C950 for MethodrTheory) <br />Bravo UDC install instructions <br />A.3) Shovel a wide bed of peagravel under the l <br />Thank you, <br />Minimum <br />Min. Amount of Sand. P, <br />Pipe Size <br />Burial Depth <br />Crushed Stone Above T <br />Surface Condition <br />A <br />B <br />In. <br />mm <br />In. <br />mm <br />In. <br />r <br />L <br />51'J <br />Unpaved <br />17 <br />432 <br />12 <br />Paved, min. 4" (100 mm) asphalt <br />12 <br />305 <br />8 <br />Paved, min. 4" (100 mm) concrete <br />9 <br />229 <br />5 <br />1 <br />Paved, min. 6" (150 mm) concrete <br />9 <br />229 <br />3 <br />t <br />75 <br />Unpaved <br />20 <br />508 <br />14 <br />Paved, min. 4" (100 mm) asphalt <br />13 <br />330 <br />9 <br />t <br />Paved; min. 4" (100 mm) concrete <br />11 <br />279 <br />7 <br />1 <br />Paved, min_ 6" (150 mm) concrete <br />10 <br />254 <br />4 <br />1 <br />4 <br />'i -,) <br />Unpaved <br />20 <br />508 <br />14 <br />Paved, min. 4" (100 mm) asphalt <br />14 <br />356 <br />10 <br />2 <br />Paved, min. 4" (100 mm) concrete <br />11 <br />279 <br />7 <br />1 <br />Paved, min. 6" (150 mm) concrete <br />10 <br />254 <br />4 <br />1 <br />F; <br />150 <br />Unpaved <br />36 <br />914 <br />14 <br />Paved, min_ 4" (100 mm) asphalt <br />24 <br />610 <br />10 <br />Paved, min. 4" (100 mm) concrete <br />20 <br />502 <br />7 <br />1 <br />Paved. min. 6" (150 mm) concrete <br />16 <br />406 <br />4 <br />1 <br />Bravo UDC install instructions <br />A.3) Shovel a wide bed of peagravel under the l <br />Thank you, <br />