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City of Ramsey Project B1610732 January 10, 2017 Page 15 was encountered in the excavation between approximately six and nine feet below grade. Confirmatory samples from the sidewalls and bottom of the excavation were analyzed for VOCs, polynuclear aromatic hydrocarbons (PAHs), DRO, and eight metals. No VOCs, PAHs, or DRO were detected above method detection limits. Metals were detected at concentrations within natural background levels. The MPCA determined that no further soil monitoring of the soil thinspread on the adjoining property to the north in a letter dated August 22, 1995. Four monitoring wells were installed in the area of the west drainfield in September 1994. During installation, soil samples were collected at 14 to 16 feet below grade. Soil samples were analyzed for VOCs, PAHs, DRO, and eight metals. No VOCs, PAHs or DRO were detected above method detection limits. Metals detected were all within natural background levels. Groundwater was encountered at 20 to 22 feet below grade. Two rounds of groundwater samples were collected and analyzed for VOCs, PAHs, eight metals, mercury and polychlorinated biphenyls (PCBs). PCBs were not detected above method detection limits. Metals, PAHs, and VOCs were detected at levels below their respective Health Risk Limits. All VOCs detected were petroleum related. The PAHs and VOCs together comprised the Identified Release. Based on the approved soil response action and a review of the environmental documents, the MPCA issued a No Action Determination letter pertaining to the Identified Release (VP4770) on June 14, 1995. A VIC application was completed on April 18, 1994 for the purpose of obtaining a technical review and approval of voluntary response action plans that may lead to the MPCA entering into an agreement with the voluntary parties. B.5.f. VP4771 A Phase I ESA was conducted in 2000 in regard to a larger 6.75-acre property (6415 Highway 10) that included the Site. At the time, the larger property was occupied by a one-story commercial building (offices, showroom and shop area) and a smaller office building. The larger commercial building was occupied by McKay's Auto Sales and Mark's Signs (located in one of the former service bays) and the smaller building was occupied by Value Auto Sales. The eastern half of the larger building was located on the Site with the remainder of the building located on what is now the adjoining parcel to the west. The smaller commercial building was located in the southcentral portion of the larger parcel (to the west of the Site). The 2000 Phase I ESA identified fifteen underground hydraulic oil lifts within the auto dealership building as being potential sources of petroleum impacts. As discussed in Section B.5.d, eight of the lifts appear to have been located on the Site. Demolition of the former automobile dealership was completed in June 2001. As part of the demolition activities, the fifteen underground hydraulic lifts in the garage portion of the building were removed. A test pit was dug following the removal of each lift and a soil sample was collected from a depth of approximately 8 feet below grade at each lift. The soil samples were analyzed for DRO and BTEX. DRO BRAUN INTERTEC