Note: These are only examples and do not represent a complete list of our project history
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Ground Water Modeling / Permit Compliance
Oaks of Weymouth
C&P conducted a ground water solute mass transport model of the Oaks STP discharge to ground water to demonstrate that an increase in the effluent nitrate concentration would not cause nitrate levels to exceed 2.5 mg/l at the property boundary of the permittee. The model was calibrated to account for all aquifer properties, including porosity, aquifer thickness and dispersivity, as well as contaminant properties including retardation and decay. This calibration also accounted for the relatively slow movement of ground water in the aquifer and a correlation between monitoring well sample results and a point in time in which the STP was loading the beds and recharging the ground water.
The results of this ground water model were accepted by NJDEP thus allowing Oaks of Weymouth to modify their NJPDES permit to increase the total nitrogen (ammonia and nitrate) concentration from 5.5 mg/l to 9.5 mg/l. This permit modification saved the client significant costs associated with STP upgrades which would otherwise have been required.
Surface Water Quality Modeling / Permit Compliance
West Milford Township Municipal Utilities Authority
C&P conducted water quality models for five (5) separate discharges in West Milford Township, which ultimately provided the basis for less stringent water quality effluent limitations, thereby relieving the Authority from future violations of their NJPDES permits and avoiding any future major capital expenditures for plant upgrading.
Effluent Discharge To Groundwater Permitting
Sussex County Municipal Utilities Authority
C&P has recently completed two Hydrogeologic Studies and prepared applications for NJPDES-DGW permits for the Authority. One application reflected a discharge of 265,000 gpd of highly treated effluent (Class II-A groundwater standards) via "recharge beds", as a means for recycling the water to be utilized by the "Vernon Towns Center" service area expansion (sewering of "Town Center" area, and service to Mountain Creek Resort). Treatment will be provided at the Authorities existing Upper Wallkill Plant (with associated upgrading). The final NJPDES-DGW permit has been issued by NJDEP.
The second application reflected the discharge of 200,000gpd of highly treated effluent via recharge beds as a means of handling the wastewater generated by the existing development within Branchville Borough. The Borough presently depends on septic systems, and will be installing a wastewater collection system. Treatment will be provided at the Authorities planned Paulins Kill Wastewater Treatment Plant. This application is presently under review by NJDEP.