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• This bid proposal includes cost for mobilization and demobilization, liners, bentonite, asphalt patch, fuel, and cement. FR will backfill each boring according to County specifications, and restored to pre- drilling condition via applying patching materials. • Soil borings will be logged using the Unified Soils Classification System under the supervision of FR's State Professional Geologist (PG) or Registered Professional Engineer. Laboratory analysis will be compared to regulatory limits set forth by the DTSC, and San Francisco Bay Regional Water Quality Control Board (SFBRWQCB). • FR will collect three (3) groundwater samples. Borehole groundwater samples will be collected via temporary monitoring wells using dedicated Teflon and Masterflex tubing and a low-flow peristaltic pump. • Samples will be analyzed by a state-certified laboratory. Reporting Detectable results of groundwater sampling will be compared to the San Francisco Bay Regional Water Quality Control Board's (SFBRWQCB) Environmental Screening Levels (ESLs) published in January 2019. The above screening levels were developed as tools to screen sites to evaluate the need for additional action in the form of additional assessment or evaluation.The screening levels are based on conservative levels derived from assessment of potential exposure pathways to the most sensitive property use. The screening levels are not default cleanup goals. It should be noted that the screening levels are guidelines and are not enforceable regulatory standards. Since the subject property is presently developed with a commercial/industrial building, and any future development would also be for commercial/industrial land use, comparison to commercial/industrial screening levels are most appropriate. A report detailing the sampling methodology and results of groundwater sampling will be prepared, and it will provide conclusions of the assessment and recommendations. The report will include maps showing soil boring locations, soil boring logs, and laboratory reports, and will be conducted by a California Professional Geologist, which meets the credentials of an Environmental Professional under 40 CFR312.10 (b). Project Management Includes project scheduling, subcontractor coordination, laboratory work order and client correspondence. Exclusion and Assumptions • Sampling and testing of building materials for potential asbestos or lead based paint is not included in this scope of work. • No regulatory agency's supervision or oversight is applicable for this investigation. ��j� ) 5