Water and wastewater utilities will be facing significant challenges moving forward into the 21st century. These challenges include competition from private companies, maintaining compliance with increasingly stringent environmental regulations, financing…
…is being installed to maintain the strict effluent discharge requirements. If the automated chlorination system achieves compliance, WASD will reduce chlorine consumption and defer costs associated with the installation of…
Emissions of polycyclic aromatic hydrocarbons (PAHs) and heterocyclic nitrogenous compounds (HNCs) were measured at a publicly owned treatment works (POTW) receiving a dry weather flow (DWF) of 409 ML/d. Samples…
Emissions of polycyclic aromatic hydrocarbons (PAHs) and heterocyclic nitrogenous compounds (HNCs) were measured at a POTW receiving a DWF of 409,000 m3/d. Samples of raw sewage, primary and secondary effluents…
…the value of production. By complying with the requirements of SB14, many companies have found that the reduced costs and liability derived from compliance far outweigh the costs of compliance….
Brown and Caldwell Laboratories has developed a rapid screening technique for Volatile Organic Compounds (VOCs) in groundwater. The technique determines the total concentration on VOCs in a sample in as…
Throughout the design of any complex project having many variables, there are often numerous changes that occur. One of the most challenging things for an engineer involved in such a…
The City of Portland, Oregon, is developing an integrated maintenance system for its three types of sewer systems, combined, sanitary, and storm. The city of nearly 500,000 has approximately 3,200…
The Western Division Naval Facilities Engineering Command incorporates sixteen major Naval and Marine centers in southern California and Arizona. Numerous hazardous materials (HM) and hazardous wastes (HW) are handled and…
…costing as the central feature of evaluating competitive bids. Life-cycle costing estimates the cost of equipment over its useful life. Components of the cost are the purchase, installation, operation, and…
…make decisions. Computers are information processors and, as such, they can greatly enhance the operator’s ability to access information and execute control commands. Computer system design and implementation is a…
…more acceptable. In 1977, a nationwide survey of manufacturers of polybrominated aromatic chemicals was completed, under the auspices of the U.S. Environmental Protection Agency. The Hexcel facility was included in…