Agmt23 BKF Engineers Tract Pump Station Improvement Project

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REV: 11-07-23 SK search, BAGG will review pertinent files or information available from the State Water Resources Control Board’s Geotracker database, as necessary. BAGG will review and research geologic literature pertaining to the site area to evaluate the geologic and hydrogeologic conditions beneath the site, aerial photography archives, historical maps, and SANBORN fire insurance maps (if available) from BAGG’s archives, or Environmental Data Resources (EDR), etc., as judged appropriate, to acquire information relative to present and past land use and drainage patterns at the site and the immediate vicinity. BAGG will perform a reconnaissance and walk-through of the building currently occupying the subject property noting any physical evidence (sight/smell) that hazardous or toxic substances may have been stored, used, spilled, or dumped at the site or in the immediate vicinity. They will perform a “drive-by” reconnaissance of the neighboring properties noting any physical evidence that hazardous materials are being stored or used on the adjacent parcels. BAGG will prepare a report summarizing their findings and including: A vicinity map, A site plan, Results of database search and file review, Discovered information on probable soil and groundwater quality beneath the site, Site photographs, Conclusions regarding the environmental condition of the subject site, Recommendations for further studies, if warranted. Deliverables: Phase I ESA report Phase II ESA If required, the Consultant’s Team will provide a Phase II Environmental Site Assessment to address the environmental quality of the soil and groundwater beneath the site by conducting an environmental investigation at the subject pump station site consisting of two borings. For this task, BAGG will review the existing environmental reports prepared for the site by BAGG or others, including the Phase-I report, if available. BAGG will obtain a permit from the San Mateo County Environmental Health for drilling environmental borings as required, mark the planned boring location in the field, coordinate the field exploration with the client representatives, retain a utility locating firm to help clear the boring locations, and notify Underground Service Alert (USA) at least 72 hours in advance. Consultant will assume as-built utility maps for the site will be made available. BAGG will then drill, log, and sample two (2) boring to a depth of 15 feet using a GeoProbe (Direct Push) which uses 1½-inch-diameter clear acetate tube to continuously sample the soil; select samples from depths starting below the pavement, and at approximate intervals of 5 feet thereafter. Tentatively, Consultant will propose two soil and one groundwater sample from each boring for analytical testing. Drilling and sampling ATTY/AGR.2023.241/BKF Engineers (Price Tract Pump Station Design) (Page 41 of 54)