City Council Agenda
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Memo to: |
Manteca City Council |
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From: |
Michael Selling, Assistant Director of Engineering/City Engineer |
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Prepared by: |
Elizabeth Cha, Assistant Engineer; Somporn Boonsalat, Deputy Director of Engineering |
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Date: |
June 16, 2026 |
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Subject: |
Agreements for Services for On-Call Materials Testing Services |
Recommendation:
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Adopt a resolution approving Agreements for Services with Aftershock Geotechnical, Blackburn Consulting, BSK Associates, Geocon Consultants, Kleinfelder, and Terracon Consultants to provide On-Call Materials Testing Services for a term of three years for a not-to-exceed amount of $300,000 each and authorizing term extensions up to two years for an additional $200,000 each for a total not-to-exceed amount of $500,000 each; and authorizing the City Manager or designee to take all appropriate actions necessary to carry out the purpose and intent of the resolution.
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Background:
The City of Manteca (“City”) Engineering Department routinely requires professional materials testing services associated with its management of development and capital improvement projects.
On March 11, 2026, the City issued a Request for Proposals (“RFP”) for On-Call Materials Testing Services. The deadline to submit questions and/or inquiries was on March 26, 2026 and responses to questions/inquiries were published on the City’s website on March 30, 2026.
On April 2, 2026, the City received proposals from the following Vendors:
• Achievement Engineering Corporation
• Aftershock Geotechnical
• Blackburn Consulting
• BSK Associates
• Construction Testing Services, Incorporated
• Crawford & Associates, Incorporated
• Geocon Consultants, Incorporated
• Kleinfelder Incorporated
• MatriScope Engineering Laboratories, Incorporated
• SALEM Engineering Group, Incorporated
• Terracon Consultants, Incorporated
The City established an evaluation committee consisting of three (3) panel members to review received proposals based on the advertised criteria and concluded that the following Vendors are the most responsible, responsive, qualified firms and meet the specific Materials Testing Services goals of the City:
• Aftershock Geotechnical
• Blackburn Consulting
• BSK Associates
• Geocon Consultants, Incorporated
• Kleinfelder Incorporated
• Terracon Consultants, Incorporated
City staff has negotiated a fixed price for materials testing services cost with each of the above Vendors to ensure fair, competitive, and quality service when called upon as needed for various projects.
Fiscal Impact:
If approved, this item will award six contracts with three-year initial terms for $300,000 each, for a total of $1,800,000. Each contract has up to two years of extensions for an additional $200,000, for a potential cumulative total of $3,000,000 over five years. The Fiscal Year 2026-27 portion of these contracts is included in the proposed budget, and funding for future years will be included in subsequent budgets.
Documents Attached:
1. Attachment 1 - Resolution
2. Attachment 2 - Location Map
3. Attachment 3 - Fee Negotiation Schedule
4. Attachment 4 - Agreement for Services with Aftershock Geotechnical
5. Attachment 5 - Agreement for Services with Blackburn Consulting
6. Attachment 6 - Agreement for Services with BSK Associates
7. Attachment 7 - Agreement for Services with Geocon Consultants, Incorporated
8. Attachment 8 - Agreement for Services with Kleinfelder Incorporated
9. Attachment 9 - Agreement for Services with Terracon Consultants, Incorporated