Water Quality and Environmental Projects

SCS has substantial experience is all aspects of water quality and environmental issues related to landfills.  SCS provides expertise in hydrogeology, environmental monitoring and water quality assessment, landfill closure assessment, and landfill closure design and remediation.  SCS has performed environmental engineering services at numerous sites around the nation and in Florida that have involved active landfills, closed landfills and/or redevelopment sites. 

Our services have included, depending on the particular site:

·         Groundwater flow and quality investigation and monitoring
·         Monitoring well and network design, construction, and testing
·         Groundwater monitoring, statistics, and reporting
·         Soil gas monitoring, focused particularly on LFG
·         Soil gas monitoring probe design, construction, and testing
·         Construction, and operation of LFG collection systems
·         Waste characterization via test trenches and sorting
     methodologies
·         Hazardous waste, regulated, and non-regulated waste
     management
·         Risk assessment
·         Soil remediation
·         Groundwater remediation.
·         Leachate management.
·         Underground and above ground tank management.
·         Property end used design and construction supervision.
·         Surface geophysical investigations.
 

Brief project profiles are provided below of several water quality and environmental monitoring projects. 

Hillsborough Heights/Taylor Road Landfills, Florida.  The Hillsborough Heights and Taylor Road Landfills consist of three separate disposal areas.  The Taylor Road Landfill is a 42-acre facility, which was closed in 1980.  The facility has been investigated under the U. S. EPA’s Superfund Program.  The Hillsborough Heights Landfill consists of two separate disposal areas comprising approximately 72 acre, which were closed in 1984.  SCS has been involved with these facilities since 1985.  During that time, SCS has conducted closure assessments, prepared post-closure care permit renewals for the facilities, conducted environmental investigations, designed improvements to the landfill cover and drainage systems, conducted LFG migration investigations, designed LFG controls for the landfill areas, prepare air permits, and provided construction services for various projects.

Pleasant Grove Landfill, Florida.  The Pleasant Grove Landfill was constructed by the Hillsborough County in the 1960’s and 1970’s on leased property.  One of the County’s major recreational reservoirs ultimately was constructed just down gradient of the landfill.  The landfill received Class I and various industrial wastes.  The landfill was never officially closed.  Over the years, the facility became overgrown and was not maintained.  Various waste products were discovered discharging to the surface during site inspections, which resulted in regulatory action by the Florida Department of Environmental Protection.  SCS was retained to conduct a contamination assessment of the site, prepare a remedial closure design, and provide construction services.  The remediation and closure involved removing waste drums and exposed sludges, regrading the site to promote drainage, and installation of a geosynthetic cap system.  The 11-acre closure project was successfully completed in 2000. 

Prince William County, Virginia. Provided groundwater statistics and data evaluation, and reporting for the PWC Landfill. Prepared permit amendment for GPS, and have begun assessment of corrective measures assessment (CMA). Installed and tested additional CMA wells to delineate the nature and extent of impacted groundwater.

Prince George’s County, Maryland. SCS was hired to oversee the groundwater monitoring program at the Browns Station Road Landfill in 2001. Tasks assigned included specifying, purchasing, and installing dedicated sampling pumps, sample collection and analysis, statistics and reporting. Reporting requirements included statistical evaluation of the data and direct comparison to Drinking Water Standards.

Fairfax County, Virginia, I-95 Sanitary Landfill. Provided groundwater statistical evaluation and consulting, reporting, and negotiations with the Virginia Department of Environmental Quality (VDEQ).  Performed semi-annual groundwater statistical evaluations and assisted with other solid waste groundwater issues as needed. Other tasks included development of groundwater protection standards, permit amendment review, VDEQ negotiations, and human health risk assessment.

Stump Dump Closed CDD Landfill, Virginia.  Provided groundwater sampling and analysis, statistical evaluations, reporting, VDEQ Negotiations, permit amendment update, variance petition, groundwater protection standards, LFG monitoring and reporting for site in Great Fall.

Upper Occoquan Sewage Authority Industrial Landfill, Virginia.  Provided groundwater consulting, statistical evaluations, reporting, well installation and development, and assisted USOA with all facets of the solid waste groundwater monitoring program for its facility located in Centreville.

Town of Marion, Virginia.  Provided groundwater sampling, analysis, statistics, reporting, and negotiations with the VDEQ to approve existing groundwater monitoring system.

Hercules Incorporated, Closed Industrial Landfill, Virginia.   Provided groundwater sampling, analysis, statistics, and reporting for facility in Covington.  Also, prepared permit amendment for Groundwater Protection Standards (GPS). Received approval of a Variance Petition to reduce the analyte list.

Cumberland County, Virginia. Multiple County Landfill Facilities, Groundwater Statistics and Reporting

Accomack County, Virginia. Provided groundwater sampling, analysis, statistics, and reporting for multiple county landfill facilities.

Chesterfield County, Virginia. Provided groundwater sampling, analysis, statistics, and reporting for multiple county landfill facilities.

C-K Company, South Boston, Virginia.  Provided groundwater monitoring, statistics, reporting, closure, and post-closure care services for a hazardous waste landfill.

Harford County, Maryland, Provided groundwater statistics, consulting, and reporting for the Harford Waste Disposal Facility (Scarboro). Tasks also included updating the facility Groundwater Monitoring Plan and completing semi-annual data evaluation and statistical reviews.

Montgomery County, Maryland. Provided groundwater statistics and reporting for the Oaks Landfill. SCS performed data analysis, statistics, and reporting for multiple County-owned solid waste facilities.

Howard County, Maryland. Provided groundwater consulting and remediation system design for the New Cut, Carrs Mill, and Alpha Ridge Landfills.