Alternate Bid Specifications -Attachment 1.pdf

This is an Alternate Bid Specifications attachment for Request for Bid #21-PW20 issued by the City of Sun Prairie Public Works Department in Wisconsin for bituminous seal coating work. The alternate specifications outline requirements for chip seal application using boiler slag aggregate as an alternative to the primary bid specifications. The work includes application of CRS-2P bituminous emulsion at a rate of 0.28 gallons per square yard, followed by placement of dry lightweight wet bottom black boiler slag aggregate at a rate of 18 ± 1 pounds per square yard. The contractor must perform street sweeping using motorized truck or vacuum equipment within 24 hours of material application across the full pavement width. The specifications note that only the material, aggregate, sweeping, and auxiliary equipment sections differ from the main RFB 21-PW20 document, with all other specifications and requirements to comply with the primary bid requirements.

The contractor is required to supply all necessary auxiliary equipment including loaders, power brooms, power blowers, hand brooms, hand squeegees, shovels, and other items needed to perform the work. The aggregate gradation requirements are specified by sieve size, with requirements ranging from 100 percent passing for 3/4" and 3/8" sieves to 0-3 percent passing the #200 sieve. The bituminous material must be applied at appropriate temperatures based on the specific grade. This alternate bid specification provides an option for material selection while maintaining compliance with all other terms and conditions of the primary RFB 21-PW20 document.