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• • • PHYSICAL SETTING SOURCE RECORDS SEARCHED • • LOCAL/REGIONAL WATER AGENCY RECORDS • FEDERAL WATER WELLS • PWS: Public Water Systems • Source: EPA/Office of Drinking Water • Telephone: 202-564-3750 Public Water System data from the Federal Reporting Data System. A PWS is any water system which provides water to at • least 25 people for at least 60 days annually. PWSs provide water from wells,rivers and other sources. PWS ENF: Public Water Systems Violation and Enforcement Data • Source: EPA/Office of Drinking Water • Telephone: 202-564-3750 Violation and Enforcement data for Public Water Systems from the Safe Drinking Water Information System(SDWIS)after • August 1995. Prior to August 1995,the data came from the Federal Reporting Data System(FRDS). • USGS Water Wells: USGS National Water Inventory System(NWIS) This database contains descriptive information on sites where the USGS collects or has collected data on surface • water and/or groundwater.The groundwater data includes information on wells,springs,and other sources of groundwater. • STATE RECORDS • Water Well Database • Source: Department of Water Resources Telephone: 916-651-9648 • California Drinking Water Quality Database • Source: Department of Health Services Telephone: 916-324-2319 • The database includes all drinking water compliance and special studies monitoring for the state of California since 1984.It consists of over 3,200,000 individual analyses along with well and water system information. • • OTHER STATE DATABASE INFORMATION • California Oil and Gas Well Locations Source: Department of Conservation • Telephone: 916-323-1779 • Oil and Gas well locations in the state. • RADON • State Database:CA Radon • Source:Department of Health Services Telephone:916-324-2208 • Radon Database for California • Area Radon Information Source:USGS • Telephone: 703-356-4020 The National Radon Database has been developed by the U.S.Environmental Protection Agency • (USEPA)and is a compilation of the EPA/State Residential Radon Survey and the National Residential Radon Survey. • The study covers the years 1986-1992.Where necessary data has been supplemented by information collected at private sources such as universities and research institutions. • EPA Radon Zones • Source: EPA • Telephone: 703-356-4020 Sections 307&309 of IRAA directed EPA to list and identify areas of U.S.with the potential for elevated indoor • radon levels. • • • • TC2751145.2s Page A-18 • •