Web1.1 Purpose. The Source Inspection Guidelines for Local Agencies (SIGLA) has been prepared to aid California local agencies to create a satisfactory Quality Assurance (QA) Source Inspection program. The term “local agency” used throughout this document means any public entity (federal, state, regional transportation planning agency [RTPA], county, … WebPlease call or write to the Stormwater Liaison, Caltrans Division of Environmental Analysis, MS-27, P.O. Box 942874, Sacramento, CA 94274-0001, (916) 653-8896 Voice, or dial 711 to use a relay service. ... • Preparing the Infiltration Reports using the T-1 Infiltration Tool to document compliance with
Infiltration Systems - California State University, Sacramento
WebThe updated tool includes definitive estimates of construction and maintenance costs including but not limited to: impervious area disconnection, rainwater harvesting, permeable pavement, and infiltration basins. They are calculated using regression equations that are a function of fixed cost components and variable cost components linked to size. WebJan 16, 2024 · Infiltration systems provide treatment by allowing stormwater runoff to infiltrate into surrounding soils. Pollutants are filtered out as the runoff percolates through the soils. These systems are assumed to be 100% effective for the design volume because no water is discharged into receiving waters. peter goldsmith oakland ca
California State University, Sacramento
WebAppendix D.1 Testing Requirements for Infiltration Bioretention and Sand Filter Subsoils D.1.1 General Notes Pertinent to All Testing 1. For infiltration trench (I-1) and basin (I-2) practices, a minimum field infiltration rate (f c) of 0.52 inches per hour is required; lower rates preclude the use of these practices. For Effective Hydraulics and Stormwater Design emphasizes stewardship of California's water resources by providing: 1. Development and … See more Web; Caltrans 2013b) was released. The Infiltration Tools use Basin Sizer to get a design storm depth (not a runoff depth). If using Basin Sizer version 1.45 and earlier a composite runoff coefficient of 1.0 must be used; in version 1.46 (the most recent) the runoff coefficient input has been removed so that only a rainfall depth is provided. starlight homes vine creek pflugerville