Lytle Water Solutions personnel have conducted numerous water quality assessments in conjunction with surface water hydrology, ground water hydrology, water rights and environmental studies. LWS personnel have also completed a number of studies where water quality assessments are the primary function of the study. Representative projects are presented below.
Watershed Water Quality Monitoring
Protection of Cherry Creek Reservoir, in the Denver metro area, from eutrophication due to excess nutrient loading was the basis for setting up a watershed water quality monitoring network of surface water and alluvial ground water flows in the watershed above the reservoir. Statistical analyses and mass balances have been used to evaluate potential water quality degradational effects from point and non-point sources, using the large water quality database that has been generated. These data have also been used in support of a watershed Master Plan.
Bedrock Aquifer Assessments
Water quality assessments have been conducted at two Special Districs in the Denver metro are to evaluate potential chemical problems that may occur as water levels decline and there is air intrusion into the water-producing zones. Water quality evaluations have also been conducted to assess potability of water and the ability to use water for irrigation.
Water quality assessments have also been conducted as part of the U.S. Bureau of Reclamation's High Plains States Ground Water Demonstration Project related to aquifer storage and recovery (ASR) projects in the Denver Basin to assess chemical compatibility of the injection water, the native ground water and the aquifer matrix.
Pre-Mining Baseline Studies
A surface and ground water quality monitoring network was set up at the San Luis Gold Project near San Luis, Colorado, to develop a pre-mining database that could then be used to assess mining impacts as continuing water quality sampling results were compared to the pre-mining data.
Similar baseline water quality networks have also been set up at other mines in Colorado, as well as mines in Wyoming, Montana, New Mexico and Alaska.
Ground Water Under the Influence of Surface Water
Alluvial ground water being produced by the Parker Water and Sanitation District, in the Denver metro area, has to be tested under the USEPA rule for ground water under the influence of surface water to evaluate if the ground water has to be treated. Ground water testing is conducted by collecting a small fraction of water pumped over a long period of time, and then testing the water for select microorganisms.
Source Water Assessment and Protection
LWS personnel know the immense importance and economic value of preventing contaminants from entering the source waters for drinking supplies. With experience leading state-wide programs throughout Colorado and Oklahoma, LWS personnel have nearly unparalleled experience with implementing assessment and protection programs. Through hands-on experience, our staff has provided technical expertise to enable understanding and quantifying risks, as well as recommending options for mitigation measures to enable development to proceed without impairing sensitive natural resources.
Water Quality Assessment Related to 303(d) Listing
Several wastewaters dischargers along Bear Creek, in Colorado, were concerned that the stream reach in which they were discharging would be placed on the 303(d) list as an impaired stream. Flow and water quality data were collected, then input to the USEPA's QUAL2E flow/water quality model to predict water quality changes. A 303(d) listing was avoided based on the presented results.