Dunkelberger Engineering



Environmental Project Profiles

	7,500-acre Cloud Grove, 2005 St. Lucie and Indian River Counties Florida … short due diligence period, large site, agri-chemical concerns. As part of a due diligence effort, an Enhanced Phase I ESA was performed for a large active citrus grove. Soil sampling and laboratory analysis was performed as part of the study to address potential agri-chemical use and storage concerns. Sediment quality evaluation was also performed within a large onsite reservoir to assess concerns with agri-chemical run-off and use of herbicides for control of aquatic vegetation.

	High-rise Condominium Site, 2003 to 2005 Fort Lauderdale, Florida … what was that doing in my backyard? An abandoned underground petroleum storage tank was found by construction workers during the development of the high-rise condominium. The storage tank was removed in accordance with the State of Florida tank closure assessment requirements, but was found to have leaked a petroleum product in the past. A site assessment performed in the area of the tank found a dissolved hydrocarbon plume in the shallow groundwater. Remediation by way of groundwater recovery and off-site disposal (recycling) was performed by Dunkelberger. After one year of required post active remediation monitoring, a site rehabilitation completion order was issued for high-rise condominium site.

	Active Marina, 2005 Pompano Beach, Florida … petroleum contamination re-visited. A Phase I ESA, completed as part of a real estate transaction, identified that two underground fuel storage tanks were removed from the marina property in the early 1990s. Review of available regulatory information revealed that soil and groundwater contamination was found during removal of the tanks which prompted the submittal of a Discharge Notification Form (DNF) to Broward County. However, the contamination “flew under the radar” as the County lost track of the facility and never required assessment or cleanup of the contamination. Dunkelberger was then contracted to perform a soil and groundwater quality evaluation to determine if petroleum contamination still existed so that a business decision could be made regarding acquisition of the marina.

	628±-Acre Agricultural Property, 2005 Clewiston, Florida … did not expect to find these environmental conditions. The project included the performance of a Phase I ESA, which identified an old cattle dipping vat (CDV) and former asphalt production plant on the property. Soil and groundwater quality evaluation performed for the client, a residential developer, revealed arsenic-impacted groundwater at the CDV and petroleum-impacted soil and groundwater at the former asphalt plant. Order-of-magnitude time and cost to cure estimates were provided to the client in an expedited fashion so that the land acquisition could be made while the client was in its inspection period.

	6+-Acre Parcel of Land, 2004 to 2006 Fort Lauderdale, Florida … downtown redevelopment project. Dunkelberger performed due diligence level studies including a Phase I ESA and Phase II ESA of the 6±-acre parcel in “old” Fort Lauderdale. The assessments identified two separate groundwater hydrocarbon plumes associated with an old gasoline service station and a former automotive repair facility. Dunkelberger provided environmental consultation and confirmatory testing for the client as the property owner’s environmental consultant performed remediation (cleanup) of the site. Construction of the 14-story condominium tower with ground floor retail could begin only after the environmental issues were resolved.

	1,100-Acre Resort Property, 2006 Haines City, Florida … fore!!! The project involved re-development of a 1,100-acre resort, which included three golf courses, resort buildings, single-family homes and condominium apartments as well as 277 acres of virgin land. As part of the developer’s due diligence efforts, Dunkelberger performed a Phase I ESA and Phase II ESA. The assessments identified arsenic and pesticide contamination from past turf-chemical application to the golf course turf grasses and storage/mixing of turf-chemicals. The Phase II ESA included options for cleaning up the contamination that was found.

	31-Acre Residential Development , 2002 to 2004 Palm Beach County, Florida … oops!!! Results of a subsurface study performed by Dunkelberger for the 31-acre planned residential development disclosed that a shell rock pit covering about 2.4 acres had been infilled with bulky metallic waste, automobile tires and construction and demolition (C&D) debris to depths ranging from three feet to more than 11 feet beneath the land surface. Upon discovery of these conditions, the project developer and members of the engineer design team met with Palm Beach County Solid Waste Authority (SWA) and created a field exploration program and plan for rectification of the conditions. The plan included short term dewatering to enable verification of removal of the waste materials. The dewatering efforts required construction of mitigative recharge trenches between the dewatering area and adjacent landfill to ensure that groundwater lowering from the dewatering activities did not cause leachate movement from the landfill. Dunkelberger was contracted to perform groundwater quality evaluation within the area of concern, oversight of the debris removal, and groundwater monitoring during construction dewatering.

	Marina/Restaurant Facility, 2001 to 2002 Boynton Beach, Florida … never a good time for surprises. Four unregistered underground petroleum storage tanks were discovered at the marina during the construction at a new dining room for the marina restaurant. Closure of the storage tank systems was performed by Dunkelberger including removal and disposal of petroleum-impacted soil and groundwater from the tank excavations. Groundwater sampling and analysis performed during the tank closure found hydrocarbon-impacted groundwater, which prompted the need for a site assessment of the tank area. A site assessment, performed by Dunkelberger in accordance with the requirements of Chapter 62-770, Florida Administrative Code (FAC), determined that the marina qualified for natural attenuation monitoring.

	City of Coral Springs Landfill, 1996 to present Coral Springs, Florida … better keep an eye on this one! The City of Coral Springs Landfill operated from 1973 through 1978 and was used for the disposal of C&D debris, vegetation, lime sludge and sewage sludges. Closure of the landfill was performed in 1998 and 1999 with periodic oversight by Dunkelberger to assure compliance with the intent of the approved closure plan.The firm performed a limited contamination assessment report of the landfill in late 1996 to evaluate the extent of a volatile organic compound plume in the groundwater of the surficial aquifer. A program of quarterly groundwater quality monitoring has been performed by Dunkelberger on behalf of the City of Coral Springs since 2000 to monitor the groundwater quality condition at the landfill.