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GOVERNMENT RECORDS SEARCHED / DATA CURRENCY TRACKING <br /> Date of Government Version:03/26/2007 Source: EPA Region 9 <br /> Date Data Arrived at EDR:03/27/2007 Telephone: 415-972-3368 <br /> Date Made Active in Reports:04/27/2007 Last EDR Contact:02/19/2007 <br /> Number of Days to Update:31 Next Scheduled EDR Contact:05/21/2007 <br /> Data Release Frequency:Quarterly <br /> INDIAN UST R7: Underground Storage Tanks on Indian Land <br /> Date of Government Version:09/06/2006 Source: EPA Region 7 <br /> Date Data Arrived at EDR: 10/04/2006 Telephone: 913-551-7003 <br /> Date Made Active in Reports: 11/08/2006 Last EDR Contact:02/19/2007 <br /> Number of Days to Update:35 Next Scheduled EDR Contact:05/21/2007 <br /> Data Release Frequency:Varies <br /> EDR PROPRIETARY RECORDS <br /> Manufactured Gas Plants: EDR Proprietary Manufactured Gas Plants <br /> The EDR Proprietary Manufactured Gas Plant Database includes records of coal gas plants(manufactured gas plants) <br /> compiled by EDR's researchers.Manufactured gas sites were used in the United States from the 1800's to 1950's <br /> to produce a gas that could be distributed and used as fuel.These plants used whale oil,rosin,coal,or a mixture <br /> of coal,oil,and water that also produced a significant amount of waste. Many of the byproducts of the gas production, <br /> such as coal tar(oily waste containing volatile and non-volatile chemicals),sludges,oils and other compounds <br /> are potentially hazardous to human health and the environment.The byproduct from this process was frequently <br /> disposed of directly at the plant site and can remain or spread slowly,serving as a continuous source of soil <br /> and groundwater contamination. <br /> Date of Government Version: N/A Source: EDR, Inc. <br /> Date Data Arrived at EDR: N/A Telephone: N/A <br /> Date Made Active in Reports: N/A Last EDR Contact: N/A <br /> Number of Days to Update: N/A Next Scheduled EDR Contact: N/A <br /> Data Release Frequency:No Update Planned <br /> COUNTY RECORDS <br /> ALAMEDA COUNTY: <br /> Contaminated Sites <br /> A listing of contaminated sites overseen by the Toxic Release Program(oil and groundwater contamination from <br /> chemical releases and spills)and the Leaking Underground Storage Tank Program(soil and ground water contamination <br /> from leaking petroleum USTs). <br /> Date of Government Version:01/31/2007 Source: Alameda County Environmental Health Services <br /> Date Data Arrived at EDR:02/02/2007 Telephone: 510-567-6700 <br /> Date Made Active in Reports:02/27/2007 Last EDR Contact:04/23/2007 <br /> Number of Days to Update:25 Next Scheduled EDR Contact:07/23/2007 <br /> Data Release Frequency:Semi-Annually <br /> Underground Tanks <br /> Underground storage tank sites located in Alameda county. <br /> Date of Government Version:02/02/2007 Source: Alameda County Environmental Health Services <br /> Date Data Arrived at EDR:02/02/2007 Telephone: 510-567-6700 <br /> Date Made Active in Reports:03/21/2007 Last EDR Contact:04/23/2007 <br /> Number of Days to Update:47 Next Scheduled EDR Contact:07/23/2007 <br /> Data Release Frequency:Semi-Annually <br /> CONTRA COSTA COUNTY: <br /> TC1913090.8s Page GR-19 <br />