6D(1) Proposal for Phse II Site Assessment

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An accumulation of waste tires within the rear fenced area is not considered a Recognized Environmental Condition; although a timelier disposal is recommended. Other Best Management Practices regarding the storage of "flammables" within a "Flammables Cabinet" and making sure that care is taken so as not to introduce waste oils to the existing floor drains (to sanitary sewer) should also be implemented. Other surrounding property use, which is predominately residential with the exception of retail and commercial business entities along W. Indiana Avenue, is not considered as having a potential for significant environmental impact to the subject site based on factors that include topography, presumed ground water flow direction, extent of remedial action completed (i.e., determination of No Further Action), and location relative to the subject site. We note that the area is currently, and has historically been, connected to municipal water and sewer services, which would minimize the potential for exposure to any contaminants that may be present within the subsurface soils and groundwater. Based upon the aforementioned, PES recommended a Phase II Environmental Site be undertaken for the purpose of assessment the extent to which, if any, the historical activities have potentially impacted the subsurface environment. Accordingly, the following sections present our approach toward conducting the Phase II Environmental Site Assessment, projected costs and a tentative schedule for completion. PROPOSED SCOPE OF SERVICES Soil Sampling via Geoprobe Methodology Geoprobe methodologies (small track mounted hydraulically driven sampling probe) will be used to collect soil samples from a total of four locations across the subject site. One soil boring is proposed for an area immediately north of the existing garage structure, in in a presumed down gradient direction for groundwater flow in the area. The second boring is proposed for the area of waste oil storage and staining within the adjacent (west) fenced area. The third and fourth boring would be established inside of the building, one within each of the service bay areas of the garage building (near existing floor drains). For each of the Geoprobe boring locations, discrete soil samples will be collected at 4- foot intervals throughout the soil profile to a depth of 20 feet below ground surface, or until saturated soil conditions are encountered. Each soil sample interval will be screened for the presence of volatile organics by placing a portion of the soil sample into a plastic bag, allowing time for equilibration, and insertion of a photo ionization detector (PID) probe to observe a reading of "total VOCs" in parts per million (ppm). All data associated with the field screening of VOCs will be recorded for future reference (Soil Boring Logs). In addition, a portion of each discrete sampling interval will also be collected for submittal to the laboratory. PES proposes to submit one soil sample from each of the four boring locations based on the PID field screening results and/or other indications of the presence of potential contamination (visual or olfactory). In the event that field screening with a PID, visual or olfactory observations do not indicate the presence of contamination; the depth interval immediately above the soil/groundwater interface will be submitted for laboratory analysis. Each of the soil samples selected for laboratory analysis will be analyzed for the presence of Volatile Organic Compounds (VOCs) and TPH Extended Range Organics (TPH-ERO). PES will utilize IDEM guidance Terra-Core. Methods to collect soil samples from each discrete sampling interval for the analysis of