The Elsinore Valley Municipal Water District board awarded Carollo Engineers Inc. the contract to design the conversion of septic systems to sewer connections for The Avenues and Sedco Hills.The board’s 4-0 vote Thursday, Oct. 27, with Harvey Ryan absent, approved a $4,190,185 professional services agreement with Carollo, which is headquartered in San Diego. The board action appropriated a total of $4,936,424 which also covers $725,288 for staff time and $20,951 for overhead.In 2005, the district developed a groundwater management plan which identified the impact nitrate from septic systems may be having on drinking water supply wells. Nitrate transport simulations were evaluated to assess the future impacts of septic systems on Elsinore Basin groundwater quality, and the results
