Consulting Services for Soils and Materials Testing

The City of Naperville, Illinois is soliciting qualifications for as-needed soils and materials testing and quality assurance consulting services, with responses due October 28, 2026 at 2:00 p.m. Proposers must hold current Illinois Department of Transportation (IDOT) pre-qualification in Quality Assurance Complete for both HMA and Aggregate and PCC and Aggregate categories, and must have a minimum of five years of testing experience.

The consultant will furnish personnel and testing equipment to provide comprehensive quality assurance for the City QA Manager on quality control and quality assurance construction contracts for hot mix asphalt and portland cement concrete, following IDOT and City policies. Scope covers plant proportioning analysis, mix design verification and selection, soil and pavement compaction analysis, aggregate certification and gradation and durability analysis, concrete and asphalt strength analysis, certified field and plant technicians, soil boring, pavement coring, and traffic control. Work supports the Transportation, Engineering, and Development Business Group, Department of Public Works, and Department of Public Utilities. Reporting must follow IDOT documentation requirements, and a dedicated project manager must be assigned for the full contract duration. The jurisdictions listed are DuPage County and Niles Village.

The initial term runs two years from award through December 31, 2028, with up to three one-year extensions if performance is satisfactory and pricing remains unchanged unless mutually agreed. Proposers must submit hourly rates for all job titles, held constant through the initial term. The City historically has not paid travel costs. Cost proposals must itemize against a provided Fee Schedule, with costs multiplied by predetermined project occurrences.

Evaluation proceeds in four phases: technical submittal evaluation, interviews and/or lab visits, cost proposal review, and scope and contract negotiations. Required submittals include a technical qualification response, redacted technical response, fee schedule and summary worksheet, cost proposal, exceptions to the Professional Services Agreement, proposer questionnaire, and affidavit of compliance. Submissions must be made electronically through the City's eProcurement Portal. The question deadline of October 19, 2026 has passed.