Laserfiche WebLink
CGRS, Inc. <br />will be placed to one foot below ground surface. Approximately one foot of native soil will be place over <br />the entire trench <br />Variations in water quality will be verified through quarterly water quality monitoring for analytical <br />parameters identified in the laboratory quality assurance plan (Appendix B). The results of the analyses will <br />be submitted to [he Colorado Depanment of Public Health and Environment, Division of Minerals and <br />Geology and Weld County Health Department. Within one week of coal ash burial water quality samples <br />will be obtained From all monitoring wells. Water quality samples will be obtained on a weekly basis for <br />one month, then monthly till [he end of the first quarter and then on a quarterly basis until project <br />termination. <br />Action Level (AL) wells will be placed between the ash and point of compliance (POC) wells. The distance <br />of the wells will be 10, 25 and 40 feet from [he trench. This staggered spacing will document water quality <br />at various distances downstream from the trench. Water quality data will be used to validate analytical fate <br />and transport models presented previously. The AL wells will provide early warning of possible adverse <br />environmental impacts. However, [he intent of [he project is to determine if coal ash can be safely deposited <br />in we[, high~nergy environments. Analytical models predict that no standards will be exceeded a[ fifty feet <br />downgradient of the trench, which is where the Division requires POC wells be placed. An exceedenance in <br />water quality standards in AL wells should not constitute a violation of the permit. The petitioner reserves <br />the right to terminate the project based on AL well water quality data. if a standard(s) is exceeded in an AL <br />well no less than monthly monitoring will occur (in AL wells) [o monitor possible adverse impacts at the <br />POC wells. <br />If a standard is exceeded in a POC well, the well will be re-sampled within one week of receiving analytical <br />results. !f the confirmation sample confirms the initial finding then the project will be terminated and the ash <br />removed from the trench. The ash will be disposed of at an approved landfill as soon as the material reaches <br />and acceptable moisture level. <br />Background water quality data indicate that iron, lead, sulfate and nitrate have been measured at levels <br />above established standards. Boron and nitrite have been measured at levels very close to established <br />standards. Water samples will be obtained from wells placed in the trench. These data, as well as column <br />leaching data, should establish the elements or compounds of concern. The detemmination that the ash has <br />contributed to groundwater degradation shall be determined by the State's project manager with <br />recommendations made by CGRS. <br />4 <br />