David H. Heslep, P.G.
Mr. Heslep is a State of Texas, Licensed Professional Geoscientist, with over 12 years experience. He has hands-on project experience including performing 100+ environmental investigations, permitting, and assessments throughout the Gulf Coast, Midwest, and Northeast regions of the United States as well as Mexico. Mr. Heslep also has significant experience in waste management, geology, petroleum geology, groundwater hydrology, soil and groundwater remediation, implementation of numerous waste management and site characterizations, and assessment / remedial investigations. Additionally, Mr. Heslep is well versed in contaminants of concerns such as cyanide, metals pesticides, herbicides, gasoline, diesel hydraulic oil, chlorinated solvents, asphalt and tar, PCBs, and dioxins.
Education
- M.S.-Texas A&M University Corpus Christi; Environmental Science
- B.S.-Texas A&M University Corpus Christi; Geology; May 1999
- B.S.-Texas A&M University Corpus Christi; Environmental Science with minor in Chemistry; May 1998
- Texas Licensed Professional Geologist No. 6414; expiration date 6/15/2006
- TCEQ LPST Project Manager PM0000116; expiration date: attached to P.G. license
Summary of Experience
Soil/Groundwater Contamination Investigation and Analysis
Mr. Heslep has been involved with numerous soil and groundwater sampling projects at sites regulated under CERCLA, RCRA, voluntary clean-up/action programs, underground storage tank regulation divisions, Michigan DEQ, Ohio EPA, Louisiana DEQ, and TCEQ which have involved the use of different sampling techniques, including low flow groundwater sampling, submersible pumps, time weighted composite, and disposable bailers. He is experienced with various drilling techniques including direct push technology, cone penetration technology (CPT), hollow-stem auger, mud rotary, air rotary, and cable tool methods.
He has conducted investigations at superfund, railway, and chemical landfills. His involvement included sampling and reporting, technical support, and project management. Investigations and monitoring were performed in Pennsylvania, Illinois, and Texas.
Mr. Heslep recently was involved in the Jones Road USEPA Superfund groundwater recovery and remediation project in Texas. The project consisted of the installation of monitoring and recovery wells and the completion of pump tests to estimate expected groundwater yields and flow rates for feasibility of remedial options. Monitoring wells were sampled for chemicals of concern (i.e., chlorinated solvents) to track movement of the plume potentially impacting the private residential water supply.
Mr. Heslep has been responsible for the preparation of various reports including quarterly and semi-annual groundwater monitoring reports for retail petroleum clients, RCRA corrective action site reports, voluntary action program (VAP) Phase I and Phase II reports for industrial facilities, and monthly reports for private well sampling at CERCLA corrective action sites.
In addition, Mr. Heslep investigated the presence of NAPL in an improperly decommissioned and demolished chemical petroleum refinery in northern Illinois. During the investigation he utilized rapid optical screening technology (ROST) and direct-push methodology (Geoprobe) to delineate NAPL throughout the site.
He has implemented operation and maintenance (O&M) activities on groundwater remedial systems, which include electrical and mechanical troubleshooting, system alterations/retrofitting, surveying and equipment installations (i.e., pumps, compressors, controls and telemetry).
Hydrocarbon Assessment and Remediation
Mr. Heslep has implemented numerous subsurface investigations for the removal of underground storage tank (UST) systems, suspected chemically impacted sites, and emergency spill response activities. He has completed field investigations to delineate soil and groundwater impacts from various hydrocarbon sources, and has managed the installation and operation of several remediation technologies including air sparging systems, soil vapor extraction, mobile dual phase extraction, vacuum truck removal, and carbon injection operations.
He has been involved with various railway projects including; hump yards, round houses, fueling depots, landfills, and maintenance facilities. The projects involved emergency responses for derailments resulting in the release of fuels, releases of hydrocarbons from tanker cars in rail yards impacting soils and surface waters, and general site investigations and remedial activities. Additionally, he was responsible for the management of numerous retail gas facilities throughout south Texas and the gulf coast. Responsibilities included reporting, installing soil borings and monitor wells, and implementing mobile dual phase extraction events.
Due Diligence Assessments
Mr. Heslep has conducted numerous Phase I and Phase II Environmental Site Assessments (ESAs) at commercial and industrial properties in Ohio, Pennsylvania, and Texas. These assessments have involved a variety of vacant lands, commercial businesses, power plants, asphalt plants, and health care facilities. Mr. Heslep performs historical data review and interpretation, regulatory data review, and site investigations. He has developed and implemented numerous surface and subsurface investigations based on the results of the Phase I ESA. Mr. Heslep is responsible for the preparation and final review of the site investigation reports to present the findings and recommendations.
Remediation and Disposal
Mr. Heslep has supervised remedial action construction projects for several sites involving the removal and disposal of coal tar wastes. Mr. Heslep was responsible for the oversight of the coal tar removal, contractors, and acted as site safety officer, performing air monitoring duties and routine health and safety meetings. Mr. Heslep successfully addressed logistical issues throughout the projects, including coordination of multiple work crews, addressing different waste removal actions, coordination of waste transportation and disposal, and soils excavation. Mr. Heslep also communicated with various public officials and local residents throughout this project to bring it to closure with the USEPA.
He has implemented chlorinated hydrocarbon remediation plans at chemical manufacturing facilities and other sites impacted by chlorinated solvents in Pennsylvania and Texas. The plan involved the introduction of a hydrogen-carbon source into groundwater in an effort to drive chemical reactions toward anaerobic conditions establishing a reducing environment.
Mr. Heslep has done work in the United States (Indiana, Louisiana, Michigan, Ohio, Pennsylvania, and Texas) and Mexico in accordance with the respective regulatory agencies.
Mr. Heslep has been recognized as:
- 2002 to present - Geologist under TCEQ PST State Lead contract;
- Presently - Assistant Project Manager for the Jones Road Superfund Project under the RIRS contract;
- 2001 - Senior geologist at a former US Air Force base in Ohio for the investigation of lead, mercury, and mercury vapor impacts from landfill activities for the US Army Corps of Engineers;
- 2000 to 2001 - Site project manager for coal tar remediation under USEPA Consent Order.
In addition, Mr. Heslep has also been involved in the investigation and remediation efforts for three (3) USEPA Superfund sites:
- 2000 to 2002 - Groundwater remediation efforts at Millcreek Superfund Site;
- 2000 to 2002 - Groundwater monitoring at Seymour Trust Superfund Site;
- 2004 to 2005 - Groundwater monitoring at Jones Road Superfund Site.