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A Water SUPPLy CASE STUDY
Providing an East County Health Clinic with a Valuable Water Supply |
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Snyder Geologic was contracted by Mountain Health Community Services (MHCS) to develop a groundwater supply well for a future health clinic to serve residents of the East County region of San Diego. As their name implies, MHCS is a company that develops and operates health clinics in remote areas of San Diego County, primarily in the mountain region that is historically underserved. One of the obstacles to any project development in the mountains is that many areas are groundwater dependent and do not have a public water system to which they can connect. Snyder Geologic worked with the team throughout the process to educate and inform the team members regarding the nuances of water supplies from a water well including the need for a pressure tank, supply tank, and fire protection tank. None of the team members (engineer, architect, plumbing contractor) had prior experience working with water wells. In conjunction with the Owner's representative, we advertised a bid request from qualified drillers complete with well specification and a scope of work to drill, test, and install the well and well components. Snyder Geologic worked with the team throughout the process to educate and inform the team members regarding the nuances of water supplies from a water well including the need for a pressure tank, supply tank, and fire protection tank. None of the team members (engineer, architect, plumbing contractor) had prior experience working with water wells. Snyder Geologic worked with the project team to select a location for the water well that complied with San Diego County Planning Department setbacks relative to the property lines, planned on-site septic system, and other nearby water wells. Once the location had been selected, we oversaw the driller during well drilling activities including setting the sanitary seal (required for a public water supply). During the drilling process, we monitored the geologic conditions and fractures encountered, monitored well yield, and made recommendations to the owner regarding additional drilling and the likelihood of increasing well yield. After the initial drilling depth was reached, the well yield was 4-5 gpm, insufficient to sustain the project. We recommended drilling additional footage and achieved a final initial flow rate of 25 gpm. Snyder Geologic developed and implemented a 72-hour constant rate aquifer test to determine the safe yield of the water well, and made recommendations for pumping rates during operation. The flow rate was kept nearly constant throughout the duration of the test and the pumping well and nearby wells were monitored through a combination of down hole pressure transducers and manual water level measurements. A water quality sample was collected for analytical testing for potability at the end of the test. Snyder Geologic prepared a report using the collected data that summarized the hydrogeologic conditions and performance of the well during the aquifer test, as well as the results of monitoring of nearby wells. We also summarized the water quality data and made recommendations for treatment. We are currently working with MHCS to permit the supply as a Non-Transient, Non-Community Small Water System. Part of those serivces include conducting a Drinking Water Source Assessment Program analysis and a Technical, Managerial, and Financial Respobsibility evaluation. |
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