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Home My WebLink About1.14 CDPHE Ltr Filing 2 FP Review Lake Springs Ranch Comprehensive Plan 2030 – FLUM Amendment Application November 2022 Exhibit 16 | CDPHE 2017 Water System Plans Review Letter Dedicated to protecting and improving the health and environment of the people of Colorado 4300 Cherry Creek Drive S., Denver, CO 80246-1530 P 303-692-2000 http://www.colorado.gov/cdphe/wqcd John W. Hickenlooper, Governor | Larry Wolk, MD, MSPH, Executive Director and Chief Medical Officer June 28, 2017 Michael Berkeley, Owner Lake Springs PUD 1517 Blake Avenue Glenwood, CO 81601 RE: Acknowledgement of Drinking Water Plans and Specifications for Non-Public Water System Water System Design Submittal, Lake Springs PUD Ground Water Treatment Plant Disinfection System Non-Public Water System Identification (PWSID Placeholder No. CO0123466), Garfield County ES Project No. ES.17.DWDR.03369 Dear Mr. Berkeley: The Colorado Department of Public Health and Environment (Department), Water Quality Control Division, Engineering Section has received and reviewed the Final Plans and Specifications for the Lake Spring Planned Unit Development in accordance with Section 11.4(1)(b) of the Colorado Primary Drinking Water Regulations (Regulation11). The design meets or exceeds the requirements of the State of Colorado Design Criteria For Potable Water Systems (Design Criteria) and is hereby approved. The Water Quality Control Division (Division), Engineering Section has received Plans and Specifications for the Lake Springs PUD non-public water system. At this time, the Lake Springs PUD does not meet the definition of a public water system as defined by Item 11.2(6)(60) of Regulation 11 and therefore, the Division does not have the authority by Regulation 11 to approve or deny the capacity assessment or the plans and specifications for construction of the water system. However, the Department performed a preliminary review of the Plans and Specifications to determine general compliance with the requirements of the State of Colorado Design Criteria For Potable Water Systems (Design Criteria, 2013 edition). In accordance with Section 11.4(1)(b) of Regulation 11, “For all public water systems, the supplier must not begin construction of any new waterworks, make improvements to or modify existing waterworks, or begin using a new source until the supplier submits and receives Department approval of plans and specifications for such construction, improvements, modifications, or use. Therefore, the Lake Springs PUD must submit plans and specifications, and a capacity assessment in accordance with Section 11.4(1) of Regulation 11, and receive approval for its waterworks once the system meets the definition of a public water system. A Professional Engineer registered in the State of Colorado shall design all treatment systems serving a community water system. The Lake Springs PUD should anticipate being classified as a community water system and meet the requirement of having the waterworks designed by a Colorado licensed professional engineer. The Division will conduct a review of the submittal (i.e., plans, specifications, capacity assessment) in accordance with the requirements of the CPDWR and the Design Criteria in effect at that time. In August 2013, Lake Springs POA received approval from the Department to install a well and treatment plant to chlorinate the source water. The Department understands that this infrastructure was not installed and the 2013 letter is now expired. Lake Springs POA has provided updated plans and specifications with an updated application dated January 5, 2017. The Department has performed a review of the updated application dated January 5, 2017. Michael Berkeley, Lake Springs POA June 28, 2017 Acknowledgement of Drinking Water Final Plans and Specifications for Construction Page 2 of 4 This acknowledgement is limited to the following: • Well E (004) Groundwater source: o Well Permit Number 60688-F. Drilled well. Screen: 210-250 feet, total depth: 350 feet, static water level approximately 194 feet. o Well improvements: casing raised to provide a minimum of 12” between grade and wellhead; 24 mesh non-corrodible vent screen. o Permitted flow: 100 gallons per minute (gpm). o Well pumping capacity: (design basis: Goulds 100H20 10 hp) 100 gpm at 240 feet TDH o All associated piping and appurtenances. • Well D (001) Groundwater source: o Well Permit Number 75843-F. Drilled well. Screen: 210-280 feet, total depth: 320 feet, static water level approximately 190 feet. o Well improvements: casing raised to provide a minimum of 12” between grade and wellhead; 24 mesh non-corrodible vent screen. o Permitted flow: 100 gallons per minute (gpm). o Well pumping capacity: (design basis: Goulds 55GS 10 hp) 60 gpm at 240 feet TDH o All associated piping and appurtenances. • Storage Tank (003): one 400,000 gallon storage tank (design basis: Permastore 56’ Dia. X 24’ high, glass fused to steel)). Tank piping and appurtenances: inlet pipe, vent, and outlet pipe. Tank level measured via an ultrasonic level detector. • Treatment Plant (002) o Treatment for Well’s D (001) and E (004), Maximum flowrate of 160 gpm. o Sodium hypochlorite treatment (D421):  Sodium hypochlorite feed pump (design basis: Stenner 45M4), 30 gallon solution feed tank (design basis: Stenner), and secondary chemical spill pallet (design basis: Ryan Herco 7401-504).  Sodium hypochlorite injection point prior to tank. Residual chlorine monitoring locations are after chlorine dosing and after storage tank before entering distribution system.  Flow switch and chlorine pump electrically connected to control dosing. o Treatment appurtenances. Raw water sampling taps in treatment building, flow monitoring from each well, two water meters (design basis: Blue-White F-2000), two in-line pressure tanks (design basis: Flow-Thru FT44), chlorine analyzer (design basis: Hach CLT 10SC), turbidity meter (design basis: Hach 1720E), vacuum valve (design basis: Apco Series 140), total flow monitoring (design basis: Blue-White F-2000). o Associated piping and appurtenances. • Distribution System (DS001) o Associated Piping and Appurtenances. Conditions of Construction: General Requirements: • Section 2.21 of the Design Criteria requires all chemicals and materials that come in contact with treated or partially treated water to be ANSI/NSF 60 and 61 certified, respectively, for potable water use. • All wells, pipes, tanks and equipment that can convey or store water intended for potable use must be disinfected in accordance with current AWWA procedures prior to initial use as required in Sections 2.15, 6.6.2, 7.0.18 and 8.7.7 of the Design Criteria. • The system has provided evidence that successfully demonstrates the disinfection provided is capable of achieving 4-log virus inactivation. The conditions as outlined in the engineering plans and specifications which must exist for 4-log inactivation of viruses to be achieved are as follows: Michael Berkeley, Lake Springs POA June 28, 2017 Acknowledgement of Drinking Water Final Plans and Specifications for Construction Page 3 of 4 o To achieve continuous, 4-Log inactivation of viruses, the system must continuously maintain a chlorine residual of 0.3 mg/L at the entry point sampling location (can be first customer), assuming a flow rate of 160 gpm, a pH between 6.0 and 9.0, a liquid temperature at or greater than 4-degrees Celsius, a baffle factor of 0.1, and a minimum active storage volume of 50,000-gallons. This letter also acknowledges the following: • The Lake Springs PUD water system does not have sufficient service connections or year-round residents at this time to be considered a public water system. As defined in Item 11.2(6)(60) of Regulation 11, a public water system means a system for the provision to the public of water for human consumption through pipes or other constructed conveyances, if such system has at least 15 service connections or regularly serves an average of at least 25 individuals daily at least 60 days out of the year. • The system provided a full suite of water quality sampling to support the drinking water engineering design and submittal. The Division does not expect that a new full suite of water quality samples will be required to support a design review submittal to the Division once the system becomes a public water system. The Division reserves the right to request additional water quality data based on any newly available information, the addition of a regulated contaminant, and as required to ensure the delivery of safe water to customers. • This acknowledgement does not relieve the owner from compliance with all Federal, State, and local regulations and requirements prior to construction nor from responsibility for proper engineering, construction, and operation of the facility. • The plans and specifications submittal appears to indicate a possible future treatment process that may require a backwash discharge. The potential future discharge appears to require either a State Discharge Permit System discharge permit or may require permitting under the U.S. Environmental Protection Agency’s Underground Injection Control (UIC) program. Please contact the Department’s permitting section for State permitting requirements at (303) 692- 3500. Please contact Omar Sierra-Lopez of USEPA Region 8 via email at sierra- lopez.omar@epa.gov or by telephone at 303-312-7045 regarding UIC permitting requirements. • Any point source discharges of water from the facility are potentially subject to a discharge permit under the State Discharge Permit System. Any point source discharges to state waters without a permit are subject to civil or criminal enforcement action. If you have any questions regarding permit requirements contact the Permits Unit at (303) 692-3500. The documents reviewed were: • Engineering Report dated December 16, 2016 titled Lake Springs PUD SPECIFICATIONS. Prepared by High Country Engineering, Inc. for Lake Springs PUD. • Basis of Design Report dated December 16, 2017 titled Lake Springs Ranch PUD. Prepared by High Country Engineering, Inc. for Lake Springs Ranch PUD (Berkeley Family LTD Partnership). The following notifications and requirements may apply to the project: • Review of this project is based only upon engineering design to provide safe potable water, as required by current requirements of Regulation 11 and shall in no way influence local building department or local health department decisions on this project. This review does not relieve the owner from compliance with all Federal, State, and local regulations and requirements prior to construction nor from responsibility for proper engineering, construction, and operation of the facility. • Any point source discharges of water from the facility are potentially subject to a discharge permit under the State Discharge Permit System. Any point source discharges to state waters without a permit are subject to civil or criminal enforcement action. If you have any questions regarding permit requirements contact the Permits Unit at (303) 692-3500. Michael Berkeley, Lake Springs POA June 28, 2017 Acknowledgement of Drinking Water Final Plans and Specifications for Construction Page 4 of 4 Please direct any further correspondence regarding the technical approval (plans and specifications/design review) to: Eric Oppelt, P.E. Colorado Department of Public Health and Environment Water Quality Control Division – Engineering Section 4300 Cherry Creek Drive South Denver, CO 80246-1530 Thank you for your time and cooperation in this matter. Please contact me by telephone at 303-692- 6437 or by electronic mail at eric.oppelt@state.co.us if you have any questions. The Engineering Section is interested in gaining feedback about your experience during the engineering review process. We would appreciate your time to complete a Quality-of-Service Survey regarding your experience during the engineering review process leading up to issuance of this decision letter. The Engineering Section will use your responses and comments to identify strengths, target areas for improvement, and evaluate process improvements to better serve your needs. Please take a moment to fill out our survey at the following website: http://fs8.formsite.com/cohealth/form627710151/index.html. Sincerely, Eric T. Oppelt, P.E. Senior Review Engineer Engineering Section | Water Quality Control Division Colorado Department of Public Health and Environment cc: Roger Neal, High Country Engineering, Inc. Garfield County Health Department Amy Zimmerman, WQCD ES Engineering Review Unit Manager Drinking Water File