UST Interim Response Action – Gas Station – Marysville, Ohio

STONE completed a Tier I and II Evaluation for an active gas station. Following the Tier II Evaluation, an Interim Response Action (IRA) was proposed by STONE in the attempt to excavate and remove the known areas of petroleum contaminated soil (PCS) based on boring logs. STONE focused four cavities for the IRA excavation on areas with soil concentrations above Ohio Bureau of UST Regulations (BUSTR) Action Levels (ALs). To account for groundwater infiltration into the cavities or excess rain water, and to reduce costs for the client, STONE set up an activated carbon filtration system on-site to pump and filter the water before discharging to a nearby storm sewer. During the excavation in one cavity, two 15,000-gallon abandoned USTs were encountered. All accessible PCS and petroleum contaminated water (PCW) surrounding the USTs were removed and properly disposed. The excavation continued until soil sample results (analyzed using an on-site mobile laboratory, also used as a cost savings to the client and to expedite the contractor activities) were below BUSTR Action Levels.

“Bayshore Environmental is very pleased to have engaged STONE to conduct a Phase II assessment of a contaminated commercial property.  The technical staff at STONE worked with us to develop an excellent program that entailed soil and groundwater sampling, testing and removal of drums of waste petroleum products, and the remediation of contaminated soil.  STONE conducted the work in a timely manner, produced an excellent report that was tailored to meet our needs, and all at a very reasonable cost.  We are pleased to endorse STONE and look forward to working with them in the future.”