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EXHIBIT "A" Scope of Services 3. Waterworks will survey the lagoons in the following order: a. Main lagoon, West b. Main Lagoon, East c. Boardwalk / Portwalk lagoon d. Rockport Ave / Seabrook Ct. lagoon e. Radio Road lagoon f. Canvasback / Positano Circle Lagoon g. Waterside Circle lagoon 4. Waterworks staff performing the survey, will visually inspects each body of water at forty- five (45) pre-designated locations, agreed upon with the City, and will make notes and compare earlier recorded data to access the need for scheduling chemical applications and/or harvesting of material. a. The three elements of Light, Heat and Food affect the growth patterns of aquatic vegetation and algae. By monitoring conditions associated with these elements, Waterworks can anticipate growth patterns more precisely. The surveys will include raking the different strata levels of the lagoons to get a determination of the widgeon grass and algae growth patterns, and use of the following: I. A Secchi disk will be utilized to measure the water clarity to gage sunlight penetration of the water column and assess the potential for accelerated vegetation and algae growth. II. A thermometer will be used to determine the water temperature. iii. When available, Waterworks may use the water quality sample results provided by the City for use in assessing the impacts of varying levels of salinity, pH, phosphates, nitrates and chlorophyll "a" for treatments scheduling. 5. Clarification: Waterworks water quality sampling, as described above in 4 (i)(ii), is strictly for use by Waterworks in determining treatment parameters and priorities, and its testing results will not supplant or substitute for the pre- treatment and/or post-treatment water quality testing and sampling conducted in compliance with the City's Water Quality Monitoring Plan and reported to the San Francisco Bay Regional Water Quality Control Board. 6. During the surveys, Waterworks staff will make observations of trash and debris for removal. The survey boat will remove small amounts of debris, whereas larger quantities will need to be scheduled for the workboat and appropriate staff. 7. Waterworks will provide survey results to Redwood City staff listing the status of the lagoons and where and if treatments or harvesting is necessary. If chemical applications are required, Waterworks staff will notify Redwood City's staff, Rich Del Ben and the City's Water Quality Monitoring consultant, Scott Cressey by phone with a follow up email. a. 11 of 18