Stratus provided environmental consulting services to the City of Rio Vista from 2003 to 2023. Our services for the City of Rio Vista’s closed municipal landfill entailed general project management and all interface with the RWQCB on behalf of the City, scheduling and performance of quarterly groundwater monitoring and semi-annual groundwater sampling, site visit/inspection coordination, and semi-annual and annual technical report preparation and professional certification. Stratus also developed, prepared, and submitted a Post Closure Maintenance Plan, on behalf of the City, in accordance with the RWQCB and Integrated Waste Management Board (IWMB).

In addition, Stratus provided landfill cap, soil cover, and vegetation maintenance services upon request from the City. Landfill cover inspections were performed on a biweekly basis (weekly during the rainy season) to inspect for evidence of erosion, daylighting of the final cap layer through the soil/vegetative cover, and changes to the vegetation (encroachment of weeds and unacceptable plant type and deep rooting). Stratus prepared work plans to repair seasonal damage that were submitted to the RWQCB for approval of compliance with the WDR, and supervised City of Rio Vista contractors performing the repair work. Rainwater runoff samples were collected after precipitation events. Stratus has also prepared multiple Repair of Minor Cover Disturbance reports for the City and has prepared numerous engineering cost estimates.

Most recent (2023) documents and exhibits prepared by Stratus include: a Report of Waste Discharge (ROWD); geologic cross sections through the landfill cap; a Sample Collection and Analysis Plan (SCAP); Sensitive Receptor Survey (SRS); Annual Groundwater Monitoring Report; a Work Plan for Monitoring Well Repair; and a Work Plan for Evaluation of Potential Landfill Gas Impacts to Groundwater.