Richard P. Arber Associates designed a 5.0 mgd arsenic removal treatment plant for the City of Alamosa. Alamosa is the largest system in Colorado that must treat its drinking water specifically for arsenic. The arsenic levels in the City’s well water range from 20-70 parts per billion (ppb), well above the maximum contaminant level of 10 ppb. Key components of the project include:

• Pilot testing of coagulant aided microfiltration, fixed bed ion exchange and continuous stirred ion exchange.
• Coagulation with Ferric Chloride.
• Submerged Membrane Treatment.
• Chlorination.
• Permitting Assistance.
• Design Services.
• Cost Estimating.
• Consent Order Negotiation Assistance.
• Construction Administration.
• O&M Manual Preparation.