REP17148 - Laserfiche WebLink

Home Browse Search

Marrb 2006 Hayden Gukb Loadaut - 2005Aanuat Hydrology Report ~ Page 3 3.0 HYDROLOGIC MONITORING 3.1 SAMPLING AND MEASURING TECHNIQUES Field measurements were recorded for conductivity, pH and temperature. Surface water flow was measured with a Swoffer Mode12100 portable velocity meter, or visually estimated. Static groundwater level measurements were taken with an electronic water level indicator. Field conductivity and pH meters were calibrated prior to each days use. The conductivity meter was calibrated using a potassium chloride solution with an electrical conductivity in the 78 to 6 ,668 micro- Siemens per centimeter (pS/crn) range. The pH meter was calibrated using NBS traceable buffets with pH values of 7.0 and 10.0 units. Surface water and groundwater samples collected for laboratory analysis were collected using standazd industry practices and U.S. Environmental Protection Agency guidance to assure the data is representative of the water resource being observed. Table 1, CDPS Permit COG-850008 Analytical Ls'rt, presents the pazameter Gst for the sediment pond outfall samples. Table 3, Surface Water Analytical Ls?t, shows the laboratory analyses Eor the surface water samples. Table 4, Groundwater Analytical hit, presents the laboratory analyses for the groundwater samples. Analyses were performed by ACZ Laboratories, Inc. (ACZ) of Steamboat Springs, Colorado. ACZ performs all analyses by U.S. Environmental Protection Agency (EPA) or equivalent methods. The surface water analytical suite was modified during 2005 as part of Technical Revision No. 6 (I'R- OG), which the CDMG approved in June, 2005. The analydcat suite was modified as part of TR-06 to assure compliance with CDPHE regulations which were amended in January 2004 (Regulation 33) and March 2005 (Regulation 31). Because the May sampling event occurred prior to approval of TR-O6, the surface water samples were analyzed for both the "old" and "new" analytical suires. With the approval of TR-O6, furore sample analyses for acidity, aluminum, bauum, fluoride, molybdenum and phosphate will be discontinued because these pazameters aze not listed in the stream standazds set forth by the CDPHE in Regulation 33, Classification and Numeric Standards for Upper Colorado River Basin (Yampa River segments 13d and 13e). There aze also no agricultural standazds for these constituents in Regulation 31, Basic Standards for Surface Wa[er. The "analytical technique" For cadmium, coppu, lead, manganese, nickel, selenium, silver and zinc has been changed from "total recoverable" [o "potentially dissolved." This is the technique mandated by the CDPHE in Regulations 31 and 33. For similaz reasons, the form of iron analyzed was changed to "total recoverable." Finally, the analytical technique Eor mercury is total, not "total recoverable" as had been reported in previous annual hydrology reports. 3.2 SURFACE WATER DATA 3.2.1 Colorado Wastewater Discharge Permit System (CDPS) Monitoring There aze two sediment ponds that aze regulated in accordance with the Colorado Wastewater Discharge Permit System. The ponds aze identified as the Tmck Loop Pond (Outfall 001A), and the Rail Loop Pond {Outfall 002A). The locations of the two sediment ponds aze shown on Figure 1, Monitoring Site Locationr. During 2005, no discharge was observed from either pond. Table 2, Summary of Sediment Posd CPDS Monitoring, presents a summary of the CDPS monitoring observations. Appendix A, CDPS Water eQuality Data, includes a listing of water quality statistics for previous years for the Loadout CDPS sites. Hydro-Envirorunental Solutions, Inc. P.O. Box 772996 57 10~^ Stnet, Suite B Steamboat Spriugr, CO 80477 (970) 871b125