6C(1) Professional Services Agreement

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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 three locations across the subject site. A fourth soil boring location is proposed for the interior of the building, within the area that has been identified as the location of former heating oil UST system. Because of the interior location, a concrete coring device will likely be required in order to gain access to undertling soils. It is anticipated that the soil sample from this location will be collected at a depth of 10 to 12 -feet, below the bottom of the former UST system. For each of the Geoprobe boring locations, discrete soil samples will be collected at 5- foot intervals throughout the soil profile to a depth of 30 feet below ground surface. 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 samples 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), TPH Extended Range Organics (TPH -ERO) and Polynuclear Aromatic Hydrocarbons (PAHs). PES will utilize IDEM guidance Terra -Core Methods to collect soil samples from each discrete sampling interval for the analysis of VOCs. Soil samples to be analyzed for TPH -ERO and PAHs will be collected within pre - cleaned, laboratory provided 4 -ounce jars. All soil samples will be labeled, packed on ice and forwarded to the laboratory under chain -of- custody procedures. Temporary Geoprobe Well Installation for Groundwater Sampling PES proposes to convert each of the three Geoprobe soil borings to temporary wells with insertion of a Geoprobe groundwater sampling device, which allows for the extension of a stainless steel slotted screen for collection of a groundwater sample from the point at which the saturated or water - bearing zone is encountered. For this proposal, PES has assumed that the water - bearing zone will be encountered within 30- feet of land surface. We propose that the three temporary wells for consist of: 1) an up gradient location, assumed to be along the southern property boundary 2) two down gradient locations, assumed to be the western property boundary (within the adjacent common alleyway with Mason's Heating & A /C), and along the sidewalk area at the front of the building. Once installed, each temporary well would be purged until such time as the water discharge becomes relatively free of solids or until at least three gallons of water have been removed. PES proposes that groundwater from each of the temporary wells be analyzed for similar constituents identified for soil samples (VOCs and PAHs). Each groundwater sample will be appropriately labeled, packed on ice, and forwarded to the laboratory (priority overnight delivery) under chain -of- custody procedures. PES will plug