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4. The lines entering the manhole shall be temporarily plugged with the plugs braced to <br />prevent them from being drawn into the manhole. The plugs shall be installed in the lines <br />beyond drop-connections, sealing connections, etc. <br />A test head shall be placed at the inside of the top of the frame of the manhole ring with <br />the cover removed. The • seal shall be inflated/sealed in accordance with the <br />manufacturer's recommendarion. <br />6. A vacuum of 10 inches of inercury shall be drawn on the inside of the manhole and the <br />vacuum pump shut off: The manhole shall pass the test if, after 2 minutes and with all <br />valves closed, the vacuum is at least 9.0 inches of inercury. <br />7. If the manhole fails the initial test, necessary repairs shall be made with a non-shrink <br />grout. If the manhole fails the vacuum test for a second time, the CONTRACTOR may <br />either replace the manhole or use a hydrostatic test which complies with section <br />217.58(b)(1) of the TCEQ rules. If the manhole is replaced, then it must be vacuum <br />tested as previously described. If hydrostatic testing is used, then the maximum allowable <br />leakage is 0.025 gallons per foot of depth (from flowline to the top of the frame) per foot <br />of diameter per hour. The test will conducted over a one-hour period minimum. The <br />CONTRACTOR shall furnish accurate measuring devices to quantify the amount of <br />water requued to refill the manhole at the end of the test period. <br />Regardless of test results, if a manhole shows evidence of groundwater entering through the <br />concrete wall, joints, or. floor of the manhole, the CONTRACTOR shall locate the point of <br />entrance and take whatever steps are necessary to permanently stop the leak, such as drilling, <br />chipping, or gas-gouging out defective concrete or gasket material, and replacing it with <br />equipment grout, cement grout or other acceptable waterproofing agents. <br />Pavement Repairs <br />a. All city streets and private driveways, open cut by this CONTR.ACTOR, sha11 be repaired <br />by this CONTRACTOR. Prior to repair, this CONTRACTOR shall maintain the access <br />over such open cuts in a passable condition to vehicular traffic, regardless of weather <br />conditions. <br />The subbase shall be a 6" compacted thiclrness of natural on-site material, compacted to <br />95% standard Proctor ASTM 1557 at slightly above optimum moisture content, and <br />placed on backfill which shall have been placed in mechanically tamped lifts of 8" to <br />95% standard Proctor density. <br />The finished pavement surface shall conform to the shape and sections shown on the <br />drawings and to adjacent undisturbed surfaces. <br />All worlmianship and rnaterials shall be in strict accordance with the 2004 standard <br />specifications for "Construction of Highways, Streets, and Bridges" as published by the <br />Texas Depa.rtment of Transportation. <br />95 <br />