VIRGINIA STATE POLICE, BRISTOL BARRACKS

VIRGINIA STATE POLICE, BRISTOL BARRACKS, PC#95-0147
Description of Role: Primary Environmental Consultant/Contractor
Project Team Leader(s): Andrew Alden, Jeffrey A. Fisher, Jr.
Project Cost: $34,887.00
Time Period of Project Work: June 2001 to December 2002
Client: Virginia State Police
Client Representative: Mr. Ronnie Rice
Regulatory Agency: Virginia Department of Environmental Quality (DEQ)
Regional Office(s): South West

Introduction:

Environmental Engineering, Inc. (EEI) is presenting this project as an example of EEI’s ability to assume project management from a previous consultant, and provide additional characterization towards the successful closure of a petroleum complaint generated by a gasoline underground storage tank (UST) release.
 

Scope of Work:

This petroleum release was discovered in 1995, when. gasoline vapors were found to be accumulating in an auditorium at the VDOT regional complex in Bristol, Virginia. During an investigation, a leaking product transfer line was found in the gasoline UST system of the neighboring Virginia State Police Barracks, which are located approximately 100 feet from the auditorium. This line was repaired; however, when the UST system was removed from service in early 1996 the tank was found to have several holes. Free product was eventually found to accumulate in at least one of the monitoring wells on-site between the release area and the auditorium. Subsequently, Environmental Options, Inc. of Rocky Mount, Virginia was hired to provide environmental consulting services, which included the preparation of an IAM and SCR and all work included therein.
EEI was contracted by the Virginia State Police to act as the primary environmental contractor in June of 2001, and was responsible for further site monitoring and characterization. EEI presented a SCRA in January 2002 that included the results of site monitoring and a soil-gas survey, which was conducted to identify possible areas of elevated residual-phase or separate-phase accumulations. The soil-gas survey comprised 35 random points between and around the release area and the VDOT auditorium. The highest concentrations were near the former tank pit. Site monitoring indicated that several of the monitoring wells installed by Environmental Options, Inc. had been lost or destroyed due to localized construction activities. Based on these findings, EEI recommended a second SCRA, that would further characterize and delineate the contaminant plumes, as well as operation of a DPE pilot study to address the periodic accumulation of free phase petroleum product in one monitoring well.
EEI submitted the second SCRA in June of 2002, which included the results of the installation of two monitoring wells and the operation of a one-week pilot study using a mobile DPE system. Placement of the two monitoring wells was found to successfully define the dissolved-phase plume, and yielded data sufficient to determine an accurate hydraulic gradient. Slug tests performed on four monitoring wells provided data necessary to define hydraulic conductivity.. The DPE pilot study suggested that recovery via high vacuum remediation was not highly efficient due to the heavy clay content of the soil and the relatively minimal amount of apparent contamination. The DPE pilot did however successfully establish a mass removal rate of 25 lbs per week, which was useful in the remediation assessment. EEI suggested that a limited CAP would be appropriate to address the periodic accumulation of free product in one of the off-site monitoring wells.
The second SCRA prepared by EEI provided the regional DEQ case coordinator with sufficient data to recommend site closure based on the successful definition of the dissolved-phase plume and the hydraulic gradient. EEI properly abandoned all the monitoring wells and submitted a Site Closure Report in December of 2002.
 

Staff and Resource Involvement:

Mr. Alden provided engineering oversight and project management assistance during EEI’s tenure with this project. Mr. Fisher was responsible for primary project management and report writing, which included drafting the two SCRA’s and the Site Closure Report, field management of the monitoring well installation, and management of the second DPE pilot study. Equipment owned and operated by EEI that was used on this project included a DeepRock™ hollow stem auger drilling rig, a mobile liquid ring pump DPE system, and a 50Kw diesel generator. No fieldwork was subcontracted to other companies.