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f . <br /> DEPARTMENT OF PGLIC UIN WORKS <br /> OA <br /> COUNTY OF SAN Q <br /> STATE OF CALIFORNIA <br /> ADDENDUM NO. 1 <br /> TO SPECIFICATIONS AND PLANS FOR THE CORRALOHLO HOLLOW M <br /> SANITARY LANDFILL GAS COLLECTION AND CONT <br /> BID OPENING EXTENSION <br /> 1. Revise the first paragraph of"Notice to Contractors," page 1, to read: <br /> Sealed proposals will be received by the Department of Public Works of the <br /> Avenue, Stockton, <br /> California,until 1:30 oclock p <br /> County of San Joaquin at the reception on the 6`' day of July 2000, at which time they will be <br /> ' <br /> rks, for the Corral <br /> publicly opened and read at the Department of PS em ll°n accordance with the Plans and <br /> low <br /> Sanitary Landfill Gas Collection and Control Sy <br /> Specifications therefor. <br /> RESPONSES TO CONTRACTOR QUESTIONS <br /> System Layout <br /> Q• <br /> Drawing 6, detail 11. The wall thickness of the 2-inch condensate <br /> SDR 9 in the Technical pe is <br /> called out as SDR 11 in the drawings,but is specified as <br /> Specifications (Section 15480, part 2.05)• Which is required? <br /> A: To minimize confusion, SDR 9 will be used for all 2-inch HDPE pipe material. <br /> Q: <br /> Drawing2. How many isolation valves are there on the air supply and condensate pipes? <br /> one shut <br /> A: Besides the valves at the condensate sumps themselves,landfill should iso a on valves near the <br /> isolation valve in each pipe at the locations of the two g <br /> main road crossings above the blower/flare facility (four line isolation valves,total). <br /> Well Details <br /> Drawing 4, detail 2. How should the Contractor account for counter the bottom oflthe <br /> Q: g <br /> and backfilling of the bottom five feet of the gas wells that en <br /> landfill? <br /> be included within the unit cost for the installed length of gas wells. <br /> A: These costs should <br />