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Articles and Papers
Educate and become an informed specifier and purchaser
Maximum Design Capacity
Specifying and producing HS-20 traffic-rated tanks in existing molds can be risky business.
The Real Dirt on Isolation Slabs

Engineering analysis proves that isolation slabs do not protect underground tanks from vehicular loads and, in fact, serve to increase loading on the underlying tank.
Public Utility Infrastructure Improvements through Enhanced Grease Trap Specifications

Wastewater utilities are experiencing increased pressure to maintain cost-effective operations while ensuring compliance with state and federal regulations. Overflows from manholes and overloads of wastewater treatment facilities often lead to regulatory non-compliances, system outages, undesired repair costs, and tarnished public image of the utility. Pervasive system problems can lead to regulatory intervention and forced remediation programs. Remediation efforts often lead to increased costs and higher rates, as well as public relations problems with utility customers.
Achieving Performance Improvement in Tennessee’s Ground Water Protection Program

The Division of Ground Water Protection's goal of ensuring that the ground waters of Tennessee are maintained in a safe and usable condition is heavily dependent on the proper application of underground septic systems for wastewater disposal in areas lacking wastewater treatment plants. Ensuring that installed underground septic tanks were properly manufactured with respect to size and quality of construction is a key element in improving performance of these systems. Two basic approaches to septic tank quality are available to the Division of Ground Water Protection. The approach currently used attempts to ensure quality by 100% inspection of tanks at the site after they are set within the ground, with rejection of any improperly sized or poorly manufactured tanks. An alternate approach relies primarily on certification of tank manufacturing processes by an independent certifying body to ensure that quality is “built in” to the tanks, with random plant inspections serving to monitor the program.
Analysis of Inflow and Infiltration from Unsealed Septic Tank Access Ports

Watertight tanks are generally overlooked as a solution to inflow and infiltration (I&I) problems in municipal and decentralized wastewater systems. The use of watertight tanks can dramatically reduce treatment costs, reduce overflow events, and help contain the ever increasing problem of inflow and infiltration. An ideal scenario would show the treated sewage effluent to be less than the total purchased water. Watering yards, washing cars, consumption, etc., all dispose of water outside the sewage collection system and account for effluent wastewater being less than purchased water.

This article was published in the following publications:

Barger, E. (Autumn 2008). “An analysis of inflow and infiltration from unsealed septic tank access ports,”
Concrete Engineering International, pp. 58-59.

Barger, E. (January/February 2008). “TMI: Too Much Infiltration!,” Precast Solutions, pp. 22-25.

**********French Translation**********

Analyse de l’afflux et de l’infiltration par le couvercle d’une fosse septique

Les fosses septiques étanches ne sont généralement pas prises en compte dans les problèmes d’afflux et d’infiltration (I&I) par les systèmes municipaux et délocalisés de traitement des eaux usées. L’utilisation de fosses septiques étanches peut dramatiquement réduire les coûts de traitement, les regorgements, et aider à contenir les problèmes d’afflux et d’infiltration qui augmentent de jour en jour. Le scénario idéal devrait montrer des effluents d‘eaux d’égout traitées comme étant inférieurs au coût total de l’eau. Or, l’arrosage des pelouses, le lavage des voitures, la consommation des ménages, etc rejettent l’eau usée en dehors du système de collecte des égouts et expliquent ainsi que le gaspillage d’effluents soit inférieurs au coût de l’eau.

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