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THE CITY OF CITY COUNCIL AGENDA REPORT 1 3 pL-EASANTON. November 5, 2019 Operations Services TITLE: RATIFY CONTRACT AMENDMENT WITH CAROLLO ENGINEERS FOR CIP NO. 17100 IN THE AMOUNT OF $197,854 TO PERFORM AN EVALUATION OF PER- AND POLYFLUOROALKYL SUBSTANCES (PFAS) TREATMENT AT WELLS 5, 6, AND 8 SUMMARY On March 19, 2019, City Council approved a professional services agreement with Carollo Engineers in the amount of $349,760 for evaluation of nitrification within the City's water distribution system and to perform a condition assessment of the facilities at Wells 5, 6, and 8. Since that time, testing at Wells 5, 6, and 8 have identified the presence of certain non-regulated contaminants of emerging concern referred to as PFAS (per- and polyfluoroalkyl substances). This contract amendment increases the compensation amount by $197,854 for Carollo to evaluate PFAS treatment alternatives at all well locations. This amendment increases the total contract compensation to $547,614. The amendment also extends the contract period to December 31, 2020. This time extension will keep the Carollo contract active through completion of both the original and amended scope of work. RECOMMENDATION Staff recommends that the City Council: 1. Ratify the contract amendment with Carollo Engineers for CIP 17100 in the amount of $197,854 with a contract term date extension to December 31, 2020. 2. Allocate $200,000 from Fund 421 Water Replacement Capital Improvement Program to CIP No. 17100. FINANCIAL STATEMENT The anticipated total project expenditures for the nitrification evaluation, Wells 5, 6, and 8 condition assessment, and added PFAS treatment evaluation is $600,000. Staff recommends that City Council allocate an additional $200,000 from Fund 421 Water Replacement Capital Improvement Program to CIP No. 17100 to fund this project.