Industry publication, December 2001

NYC 9/11 Public Portal Document

local drinking water wells still contain no more than 7 ppm, nitrates pose a partic­ Wastewater ular risk to infants and the elderly by re­ ducing blood’s oxygen-carrying capacity,

LAKE HAVASU CITY BEGINS SWITCH says Kevin P. Murphy, city public works director.

FROM SEPTIC SYSTEMS TO SEWERS The city plans to expand two existing wastewater treatment plants that serve 15% of local residences, build a third THREATENED WITH A STATE-IMPOSED TBE.T'i plant and install 390 miles of gravity building ban, Arizona’s Lake Havasu City aL mains and 400 miles of laterals. ‘This is is quickly beginning to spend $463 mil- jaSBre one of the most expensive projects ever lion approved by voters last month on an I undertaken by a community of its size,” expanded sewerage system. But other J. f says Robert S. Schulz, Phoenix-based fest-growing communities along the Low- manager of Burns & McDonnell Engi- er Colorado River remain ill-equipped to S neering Co., a consultant to Lake Havasu decommission the large number of septic j City and to the locally based Colorado tanks that leak nitrates along the river—a River Regional Sewer Coalition, which source of drinking water for 21 million Q includes the Metropolitan Water District people in California and Arizona. of Southern California in Los Angeles. The successful bond referendum will C. The group wants the federal govern­ allow the city to increase local wastewater ment to pay half of the estimated $1. 6-bil- treatment capacity from the current 2.5 SEPTIC City must lay new sewer mains. lion cost to install 34.5 mgd of sewerage million gal per day to 13.8 mgd, and to for the Lower Colorado’s 200,000 resi­ decommission 25,000 septic tanks used by the bond election failed,” says Charles dents. “We’re trying to prevent a night- 42,000 residents. By next September, the G. Graf, deputy director of the Arizona mare on the Lower Colorado River,” says city plans to begin soliciting construction Dept, of Environmental Quality’s water Lake Havasu City Mayor Melanie Grin­ bids for the first $5-million phase. quality division. stead-Hanak. Total expenditures on the State officials pressured the city to act Some of Lake Havasu City’s monitor- region’s sewerage improvements add up quickly. “We were ready to issue a mora- ing wells contain four times the federal to $45 million since the coalition’s found- torium on building new septic tanks if nitrate limit of 10 parts per million. While ingin 1997 (ENR 10/20/97 p. 32). □

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DECEMBER 3, 2001/ENR 17

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