Good Samaritan Remediation of Abandoned Hardrock Mines Act of 2024

U.S. Government Publishing Office (GPO) | December 17th, 2024

To promote remediation of abandoned hardrock mines.

To promote remediation of abandoned hardrock mines.

Grassland Groundwater Sustainability Agency Groundwater Sustainability Plan

Grassland Groundwater Sustainability Agency (GGSA) | January 17th, 2020

*Cover gives draft date of December but consulting engineer signature is for 1/17/2020

*Cover gives draft date of December but consulting engineer signature is for 1/17/2020

Gravelley Ford Water District Groundwater Sustainability Plan

Gravelly Ford Water District (GFWD) | August 12th, 2019

Green Infrastructure Planning for North Richmond Pump Station Watershed with Green Plan-IT

San Francisco Estuary Institute (SFEI) | November 1st, 2018

Contra Costa County and the City of Richmond, via the San Francisco Municipal Regional Stormwater Permit (MRP), are required to develop and implement a Green Infrastructu

Contra Costa County and the City of Richmond, via the San Francisco Municipal Regional Stormwater Permit (MRP), are required to develop and implement a Green Infrastructure (GI) Master Plan to reduce mercury and PCB loads in stormwater runoff from each jurisdiction. This project used GreenPlan-IT, a planning tool developed by the San Francisco Estuary Institute (SFEI) and regional partners, to identify feasible and cost-effective GI locations within the North Richmond Pump Station watershed (an unincorporated community of Contra Costa County and partial jurisdiction of the City of Richmond) to support the development of GI Plans for permit compliance. 

Green Infrastructure Planning for the City of Oakland with GreenPlan-IT

San Francisco Estuary Institute (SFEI) | July 2nd, 2018

The City of Oakland, via the San Francisco Municipal Regional Stormwater Permit (MRP), is required to develop and implement a Green Infrastructure (GI) Master Plan to red

The City of Oakland, via the San Francisco Municipal Regional Stormwater Permit (MRP), is required to develop and implement a Green Infrastructure (GI) Master Plan to reduce stormwater mercury and PCB loads. This project used GreenPlan-IT, a planning tool developed by the San Francisco Estuary Institute (SFEI) and regional partners, to identify feasible and cost-effective GI locations within the City boundary to support the development of GI Plans for permit compliance.  GreenPlan-IT comprises four distinct tools: (a) a GIS-based Site Locator Tool that combines the physical properties of different GI types with local and regional GIS information to identify and rank potential GI locations; (b) a Modeling Tool that is built on SWMM5 to establish baseline conditions and quantify anticipated runoff and pollutant load reductions from GI implementation; (c) an Optimization Tool that uses an evolutionary algorithm to identify the best combinations of GI types and numbers of sites within a study area for achieving flow and load reduction goals; and (d) a Tracker Tool that tracks GI implementation and reports the cumulative programmatic outcomes for regulatory compliance and other communication needs. 

Green Infrastructure Planning for the City of Richmond with GreenPlan-IT

San Francisco Estuary Institute (SFEI) | November 1st, 2018

The City of Richmond, via the San Francisco Municipal Regional Stormwater Permit (MRP), is required to develop and implement a Green Infrastructure (GI) Master Plan to re

The City of Richmond, via the San Francisco Municipal Regional Stormwater Permit (MRP), is required to develop and implement a Green Infrastructure (GI) Master Plan to reduce stormwater mercury and PCB loads. This project used GreenPlan-IT, a planning tool developed by the San Francisco Estuary Institute (SFEI) and regional partners, to identify feasible and cost-effective GI locations within the City boundary to support the development of GI Plans for permit compliance.  GreenPlan-IT comprises four distinct tools: (a) a GIS-based Site Locator Tool that combines the physical properties of different GI types with local and regional GIS information to identify and rank potential GI locations; (b) a Modeling Tool that is built on SWMM5 to establish baseline conditions and quantify anticipated runoff and pollutant load reductions from GI implementation; (c) an Optimization Tool that uses an evolutionary algorithm to identify the best combinations of GI types and numbers of sites within a study area for achieving flow and load reduction goals; and (d) a Tracker Tool that tracks GI implementation and reports the cumulative programmatic outcomes for regulatory compliance and other communication needs. 

Green Infrastructure Planning for the City of Sunnyvale with GreenPlan-IT

San Francisco Estuary Institute (SFEI) | July 2nd, 2018

The City of Sunnyvale, via the San Francisco Municipal Regional Stormwater Permit (MRP),is required to develop and implement a Green Infrastructure (GI) Master Plan to re

The City of Sunnyvale, via the San Francisco Municipal Regional Stormwater Permit (MRP),is required to develop and implement a Green Infrastructure (GI) Master Plan to reduce stormwater mercury and PCB loads. This project used GreenPlan-IT, a planning tool developed by the San Francisco Estuary Institute (SFEI) and regional partners, to identify feasible and cost-effective GI locations within the City boundary to support the development of GI Plans for permit compliance.  GreenPlan-IT comprises four distinct tools: (a) a GIS-based Site Locator Tool that combines the physical properties of different GI types with local and regional GIS information to identify and rank potential GI locations; (b) a Modeling Tool that is built on SWMM5 to establish baseline conditions and quantify anticipated runoff and pollutant load reductions from GI implementation; (c) an Optimization Tool that uses an evolutionary algorithm to identify the best combinations of GI types and numbers of sites within a study area for achieving flow and load reduction goals; and (d) a Tracker Tool that tracks GI implementation and reports the cumulative programmatic outcomes for regulatory compliance and other communication needs. 

Green Plan-IT Application Report for the East Bay Corridors Initiative

San Francisco Estuary Institute (SFEI) | November 1st, 2018

Regional planning of Green Infrastructure (GI) is an important aspect of building in or retrofitting GI and other green spaces across municipal jurisdictions. This level

Regional planning of Green Infrastructure (GI) is an important aspect of building in or retrofitting GI and other green spaces across municipal jurisdictions. This level of planning allows for GI to be implemented according to natural boundaries and builds important partnerships across municipalities. The East Bay Corridors Initiative is a unique partnership across 13 jurisdictions, county and regional agencies, as well as community groups and businesses to plan new housing, create job opportunities, and improve parks and streets with linkages to essential services (ABAG 2016). The Initiative covers a large swath of the East Bay of San Francisco Bay, CA from Rodeo in the North to Union City in the South and focuses on Priority Development Areas (PDAs) and transportation linkages. In addition to the above focus, the Initiative will also look at opportunities for GI implementation across the Corridor. The Resilience priority within the Initiative focuses on sustainable infrastructure including regional GI implementation, green streets, and stormwater/flooding mitigation (ABAG 2016). The objective of this project was to use GreenPlan-IT, a planning tool developed by the San Francisco Estuary Institute (SFEI), to identify feasible GI locations within the East Bay Corridor footprint. Results from the application of the Site Locator Tool will be used to: 1) identify potential green infrastructure projects for the Corridor’s sustainable infrastructure planning efforts, including the development of information for municipal and regional GI Master Plans and Stormwater Resources Plans; and 2) potentially help comply with municipal Stormwater Permit requirements.  GreenPlan-IT is a planning level tool that was developed over the past five years with strong Bay Area stakeholder consultation and designed to support the cost-effective selection and placement of green infrastructure in urban watersheds through a combination of GIS analysis, watershed modeling, optimization techniques, and data visualization. Structurally, GreenPlan-IT comprises four standalone tools: (a) a GIS-based Site Locator Tool that combines the physical properties of different GI types with local and regional GIS information to identify and rank potential GI locations; (b) a Modeling Tool that is built on EPA’s SWMM5 (Rossman, 2010) to establish baseline conditions and quantify anticipated runoff and pollutant load reductions from GI sites; (c) an Optimization Tool that uses a cost-benefit analysis to identify the best combinations of GI types and number of sites within a study area for achieving flow and/or load reduction goals; and (d) a tracker tool that is used to track GI implementation and report the cumulative programmatic outcomes for regulatory compliance and other communication needs. The Toolkit package, consisting of the software, companion user manuals, and demonstration report, is available on the GreenPlan-IT web site hosted by SFEI. 

GreenPlan-IT Tracker

San Francisco Estuary Institute (SFEI) | June 14th, 2018

This technical memo describes the purpose, functions, and structure associated with the newest addition to the GreenPlan-IT Toolset, the GreenPlan-IT Tracker. It also sh

This technical memo describes the purpose, functions, and structure associated with the newest addition to the GreenPlan-IT Toolset, the GreenPlan-IT Tracker. It also shares the opportunities for further enhancement and how the tool can operate in concert with existing resources. Furthermore, this memo describes a licensing plan that would permit municipalities to use the tool in an ongoing way that scales to their needs. The memo concludes with a provisional roadmap for the development of future features and technical details describing the tool’s platform and data structures. About the GreenPlan-IT Toolkit Municipalities across the state and beyond are carefully planning and implementing green infrastructure in their developed landscape to restore key aspects of the natural water cycle. Green infrastructure helps to achieve stormwater attenuation and contaminant filtration by increasing the pervious surfaces in often sophisticated ways. Additionally, green infrastructure features, as city dwellers have come to realize, demonstrate multiple benefits in addition to improving surface porosity, such as peak, volume, and load reductions, urban heat island mitigation, traffic calming, carbon sequestration, wildlife habitat, natural aesthetics, and others. The benefits are substantial, but so are the potential costs. GreenPlan-IT helps planners to make smart decisions in the types and locations of green infrastructure, minimizing effort and cost while maximizing the effectiveness of the public and private investments. GreenPlan-IT modules are focused on green infrastructure planning and assessment, including the Site Locator Tool, Modeler, and Optimizer tools. Together the modular toolkit can be used to take a city from a position of not knowing where to consider GI placement (a daunting position given the MRP C3 and C11/12 requirements), to a plan that includes a list and map of feasible locations and a map of baseline flow and pollutant load conditions, and a selected optimal set of placement locations for achieving flow and load reductions at minimal cost. Now, with the advent of the GreenPlan-IT Tracker, there is also a web based tracker for quantifying and communicating the locations, types, and treatment areas of GI installations (the outputs of all the planning efforts) and quantifying the peak flows, volumes, and loads reduced (the outcomes of all the implementation and cost expenditure that the community is asking for).

Ground Water Flow in a Desert Basin: Challenges of Simulating Transport of Dissolved Chromium

National Groundwater Association (NGWA) | December 13th, 2005

A large chromium plume that evolved from chromium releases in a valley near the Mojave River was studied to understand the processes controlling fate and migration of chr

A large chromium plume that evolved from chromium releases in a valley near the Mojave River was studied to understand the processes controlling fate and migration of chromium in ground water and used as a tracer to study the dynamics of a basin and range ground water system. The valley that was studied is naturally arid with high evapotranspiration such that essentially no precipitation infiltrates to the water table. The dominant natural hydrogeologic processes are recharge to the ground water system from the Mojave River during the infrequent episodes when there is flow in the river, and ground water flow toward a playa lake where the ground water evaporates. Agricultural pumping in the valley from the mid‐1930s to the 1970s significantly altered ground water flow conditions by decreasing water levels in the valley by more than 20 m. This pumping declined significantly as a result of dewatering of the aquifer, and water levels have since recovered modestly. The ground water system was modeled using MODFLOW, and chromium transport was simulated using MT3D. Several innovative modifications were made to these modeling programs to simulate important processes in this ground water system. Modifications to MODFLOW include developing a new well package that estimates pumping rates from irrigation wells at each time step based on available drawdown. MT3D was modified to account for mass trapped above the water table when the water table declines beneath nonirrigated areas and to redistribute mass to the system when water levels rise.