San Diego County Ivalua #886

Pine Valley Wastewater Treatment Plant Aerobic Lagoon Rehabilitation – Award and Solicitation Summary

This opportunity involves the rehabilitation of the aerobic lagoon at the Pine Valley Wastewater Treatment Plant in San Diego County, CA. - Government Buyer: - County of San Diego, Department of Public Works (project owner) - Department of Purchasing & Contracting (procurement office) - Awarded Vendor: - Downstream Services, Inc. (Escondido, CA) - Project Scope: - Dredging, dewatering, hauling, and disposal of approximately 380 dry tons of biosolids from aerobic lagoons - Mobilization/demobilization of equipment - Screening dredged liquid to remove rocks and debris - Dewatering operations using an Active Treatment System (ATS) - Legal disposal of biosolids and screened materials - Removal and reinstallation of aerators as needed - Key Requirements: - Compliance with the County's Working Families Ordinance (skilled and trained workforce) - Submission of a Temporary Active Treatment System (ATS) plan within 20 days of contract approval - Daily inspection reports within 24 hours and a final report post-dredging - Dewatering system must achieve at least 20% cake solids and 95% solids capture - Contractor supplies electricity (diesel generators required for dewatering system) - Environmental protections: exclusionary fencing for Arroyo toad, nesting bird surveys, spill containment - Work hours: 7:00 AM–4:00 PM, Monday–Friday - Filtrate discharge limited to 250 gallons per minute - Estimated Contract Value: $955,000 to $996,000 - No specific OEMs for equipment are named; Carollo Engineers, Inc. is listed as the project designer. - Place of Performance: Pine Valley Wastewater Treatment Plant, Pine Valley, CA

Description

This solicitation is for the rehabilitation of the Pine Valley Wastewater Treatment Plant Aerobic Lagoon. The work involves dredging, dewatering, hauling, and disposal of biosolids from the aerobic lagoons at the treatment plant. The contract includes mobilization and demobilization of equipment, screening dredged liquid to remove debris, and related activities as specified in the contract documents. The estimated quantity of biosolids to be removed is approximately 380 dry tons. The project site is located at Pine Valley County Park, San Diego, California.

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