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645 Parfet Street Lakewood, CO 80215303-239-7078
5150 Allison Street Arvada, CO 80002303-271-5780
7495 W. 29th Ave. Wheat Ridge, CO 80033303-271-5780
What is a HLT?
A HLT System is a type of OWTS that uses mechanical components to provide improved wastewater quality. These systems are typically required when minimum setbacks to wells cannot be met, on smaller lots, and to prevent further groundwater degradation in acres of known contamination, such as Indian Hills. While a few older HLT consist of recirculating sand filter beds, most are manufactured units which have passed a rigorous national certification requirement known as NSF 245. Trade names for these systems include aeration systems such as HOOT® and MicroFAST®, as well as Trickling Media Filters such as Advantex®. Although most of the treatment is provided within the HLT unit itself, final disposal will take place in a regular absorption bed or leaching field, where the soil will provide additional treatment before the wastewater re-enters the ground water cycle.
Typical Control Box with Alarm
Operation and Maintenance Service ProvidersSince proper operation and maintenance of HLT systems is beyond the ability of the average homeowner, the Department requires that routine service be performed by a Service Provider who has taken the necessary nationally-recognized training to do so. See our list of approved Service Providers. Service ContractsTo provide the required maintenance, most Service Providers will enter into a contract with the homeowner. This contract should be for a specific time period and provide for routine service inspections every six (6) months in accordance with Department requirements. Responding to alarms or other emergencies is typically billed as a separate item. Multi-year contracts are usually paid on an annual basis. Be sure to obtain a detailed list of services to be provided and the associated costs. The Service Providers are required to notify the Department if a contract is terminated.
Operating PermitsDue to the complexity of HLT systems and the need for ongoing routine maintenance, these systems are required to have an Operating Permit effective January 1, 2015. These permits will be issued when the current service contract is renewed and will run for the length of the new service contract. The permit will require service and maintenance inspections – typically every six months – along with specific reporting requirements to verify that the work was completed. The Department will issue the initial Operating Permit will be issued at no charge; renewals will be assessed a nominal fee. These fees are in addition to the actual cost of the contract itself with the Service Provider. The Service Provider will report all inspection visits to the Department as they are completed. Upon review, we will also notify the homeowner of what was done and whether any problems were noted and corrected. Since proper maintenance is critical to HLT operation, the Department has the right to initiate legal action for failure to maintain an Operating Permit or failure to perform and report the required service visits.
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