Active SLED Opportunity · CALIFORNIA · CITY OF PLACERVILLE
AI Summary
City of Placerville requests RFP for cleaning, sludge removal, inspection, and potential repair estimates of Water Reclamation Facility Digester #1. The project requires completion within 7 days post mobilization and involves handling Class B sludge and debris removal.
Digester #1 has been in service since 2009 and the city desires to have the contents removed and the tank cleaned and minimally inspected. The digester consists of a 40-ft diameter concrete tank with a 23-ft side depth, 1:5 sloped bottom, 4-ft sump, and a fixed concrete cover. Inside the digester are mixing pipes, a baffled inlet, and various other appurtenances. A 3-ft by 4-ft bolted manway provides access for cleaning. (see attached digester plans) The working volume of sludge is expected to be approximately 80,000 gallons at the time of the project. Most of the sludge will meet class B pathogen reduction requirements and can be dewatered onsite by the contractor and removed by cake solids or removed by liquid slurry. There will likely be a significant amount of liquid, grit, and other debris that cannot be utilized for Class B sludge pathogen reduction and shall be removed from site as a liquid or slurry as needed. Once the project has begun post mobilization, time will be of the essence and the digester will need to be cleaned, inspected, and returned to service within 7 days. Contractors will utilize the best management practices to minimize the volume of dilution and wash water generated in the cleaning process. Operators will review any solids loss in the Contractor dewatering processing and Contractor shall operate any dewatering equipment such that solids loss is minimized in dewatering as inspected and advised by city operators. Wash water and water from the dewatering process may possibly be run through the treatment facility. Should the recycled wash/dewatering carry the imminent or evident potential to cause a plant upset, the contractor shall provide means of removal of the water to the landfill. The treatment facility can provide non-potable water at a maximum of 60 psi and at a maximum rate of 150 gallons per minute. Inspection shall consist of observing and recording the condition of all inner piping and appurtenances and the overall condition of concrete surface and/or coating, voids and/or cracks, including walls, floors and ceiling, and sump. Any inner repair estimates for damaged inner piping and appurtenances, and/or surfaces or coatings found post inspection shall be provided to the city, and no repairs shall commence until approved by the city. Repairs are outside of and will extend the 7-day project completion requirement and shall compensated on a time and materials basis.
SLED stands for State, Local, and Education. These are solicitations issued by state governments, counties, cities, school districts, utilities, and higher education institutions — as opposed to federal agencies.
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