Active Remediation Six Mile Cypress Bus Facility

  • Location: Fort Myers, FL

The Six Mile Cypress Bus Facility had been impacted with
petroleum products due to a line leak. After assessing the suspected impacted
area, AMRC determined that the contamination was limited to the soils in the
vadose zone. After delineating the area via a combination of hand auger and
direct push borings, AMRC created a remedial action plan to address the
contamination. After reviewing the potential cleanup technologies (soil vapor
extraction, excavation, soil washing with groundwater extraction, etc) it was
determined that a limited bio injection could be used to perform the remediation.
In order to limit the School Districts financial liability, AMRC decided to
perform the remediation using Pay for performance principles. In order to
accomplish this, AMRC and our subcontractor developed a unique bio-cycle
method bio-injection RAP. The bio-cycle method works by injecting augmented
water from the top to the bottom of the impacted soil column. This method of
injection is important because one of the major limiting factors for bio-
remediation in the unsaturated zone is keeping the soils moist enough to allow the
microbes to consume biomass and multiply. The RAP was approved on February
12, 2010 and a report of remediation detailing the activities was submitted in
June, 2010 (approved December 29, 2010). The required quarterly post
remediation monitoring occurred in 2011 and the SRCO was granted on
November 14, 2011. The total cost for the project was $45,141.00. There were
no change orders and the project was completed on time and under budget.