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BACKGROUND, CON'T <br /> Since 1984, Georgia-Pacific emptied the pond, excavated soil and treated about 194 million gallons of <br /> groundwater. These activities removed about 139 pounds of chloroform. <br /> SOIL AND GROUNDWATER CONDITIONS <br /> After the pond was drained in 1984, testing showed the soil contained up to 200 parts per million (ppm) of <br /> chloroform. After Georgia-Pacific excavated 1,500 cubic yards of soil from the pond, the remaining soil <br /> only contained 3.4 ppm or less of chloroform. <br /> Sampling of monitoring wells shows that the amount of chloroform in the groundwater is diminishing with <br /> time. Monitoring well (BC-10) contained up to 970 parts per billion (ppb) of chloroform in 1985, 41 ppb in <br /> 2004, and 10 ppb in 2009. Similar trends are seen in the other site monitoring wells. <br /> Chloroform in the groundwater is also diminishing with distance from the former pond. The latest sampling <br /> showed the highest level of chloroform remaining in site groundwater is 22 parts per billion (ppb) near the <br /> source area, and declines to 2.6 ppb about 1,400 feet from the source. <br /> The current standard for chloroform in drinking water as set by the California Department of Public Health <br /> is 80 ppb. All monitoring wells meet this standard. The cleanup goal of 5 ppb is projected to be met in <br /> 2016 in all wells. <br /> RISK TO HUMAN HEALTH AND THE ENVIRONMENT <br /> Groundwater, about 40 feet deep, has levels of chloroform that are below drinking water standards. <br /> Notice to the Hearing Impaired <br /> TDD users can obtain information about the Site by using the California State Relay Service (800) 735- <br /> 2929 to reach the Public Participation Specialist. Ask them to contact the Central Valley Water Board at <br /> (916) 464-3291 regarding the proposed closure of the Former Georgia-Pacific Chemical Packaging Plant, <br /> Tracy. <br /> FOR MORE INFORMATION <br /> Please contact Gerald Djuth with the Central Valley Water Board to submit any comments or if you have <br /> any questions regarding the proposed project or any of the information presented in this fact sheet. <br /> Mr. Gerald Djuth, Engineering Geologist <br /> California Regional Water Quality Control Board, Central Valley Region <br /> 11020 Sun Center Drive, Suite 200 <br /> Rancho Cordova, CA 95670 <br /> Phone: (916)464-4677 <br /> Email: GDjuth@waterboards.ca.aov <br /> If you would like to learn more about the Water Board, please visit our website at www.waterboards.ca.gov. <br />