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3 . Section 02687 . 3 .4 .G Refuse Disposal - Delineate appropriate <br /> methods for handling and disposal of refuse drilling and <br /> excavation spoils . <br /> 4 . Section 11000 . 2 . 2 Centrifugal Gas Blowers - Shaft seals for <br /> the blower should be specified. (Mechanical seals are <br /> preferred for this application) . <br /> S . Section 11000-2 . 3 .b. 5 . f Pressure Switch - Electrical control <br /> elements mounted on or near pressurized gas piping should be <br /> in explosion proof housings . <br /> 6 . Section 15480 . 3 . 8-Pressure Testing - The pressure and test <br /> periods for HDPE and ABS piping are not specified. <br /> Comments - Contract Plans <br /> 7 . DRWG NO. 1 - There is no isolation/control valve shown in . <br /> the discharge line from the control manifold for wells <br /> D2 . . .DS . <br /> 8 . DRWG NO. 1 - There is no valve installation detail shown for <br /> single perimeter gas extraction wells which tie directly <br /> into the main perimeter gas header. <br /> 9 . DRWG NO. 7, Detail 19 - Show pipe guides and/or pipe clamps <br /> on the above grade pipe support racks . <br /> 10 . DRWG NO. 7, Detail 22 - Suggest that buried expansion joints <br /> be installed in concrete utility vaults when they are in the <br /> vegetative layer. <br /> 11 . DRWG NO 7 Detail 20 - The banding of together of above <br /> grade exposed pipes which are of different materials is not <br /> acceptable, especially when the materials have significantly . <br /> different coefficients of expansion such as steel and PVC. <br /> 12 . DRWG NO 8 Detail 26 - Condensate transfer pump should be <br /> furnished with seal drip cups with drip lines discharging <br /> directly into the containment pad drain sump. In addition <br /> detailed specifications for the condensate transfer pump <br /> should be included in the Technical Specifications . <br /> 13 DRWG NO E3 E4 &E5 - All electrical enclosures which contain <br /> electronic control equipment should be fitted with <br /> thermostatically controlled heaters of sufficient wattage to <br /> prevent condensation on the inside of the enclosures during <br /> diurnal and seasonal temperature variations. <br />