2013-485 AMS - ECS Carolinas LLP County Jail Site EAS Phase 1 Geotech Study Utility Capacity Study $7,600

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Proposal for Geotechnical Services and Phase I ESA Orange County Jail Site Hillsborough,Orange County,North Carolina ECS Proposal Number 06:17061 NOW SCOPE SERVICES ASBESTOS SURVEY(NON-SCOPE) ECS will not be performing an asbestos survey as part of the Phase I Environmental Site Assessment. Please be advised that if there are structures on the property scheduled for demolition or renovations, an asbestos survey will be required by The National Emission Standards for Hazardous Air Pollutants (NESHAP). NESHAP requires an asbestos survey prior to the disturbance of potential asbestos- containing materials (ACM). The North Carolina Department of Health and Human Services (DHHS) also requires an asbestos survey when filing for a demolition permit. RADON TESTING(NON-SCOPE) ECS will not be performing radon testing as part of the Phase I Environmental Site Assessment. Radon is a naturally occurring radioactive gas that seeps out of the bedrock and up through the soil. Radon can collect in basements and other poorly ventilated areas on the ground level of structures. Although it is not a requirement for residential property transactions, ECS recommends radon testing. If requested, ECS can perform radon testing, following the Environmental Protection Agency (EPA) protocol. The EPA guidelines for testing involves, at a minimum, placing two radon canisters side-by- side, approximately 16 to 24 inches off the ground, in the most frequently occupied room on the lowest floor of the building, and left in place to collect radon gas for three to five days. After sample collection, the canisters are shipped to an independent laboratory and analyzed for picoCuries of radon per liter of air (pCi/1). The average pCi/I reading of the two canisters is the reported test result. The EPA's action level is 4.0 pCi/I, which means that for reported results above this level, engineering controls, remediation, and/or retesting is recommended. LEAD IN DRINKING WATER(NON-SCOPE) The EPA has established a program to control lead levels in drinking water, which can be a significant source of exposure to lead in some areas. Because Title X (EPA) does not define water as a lead-based paint hazard, and because building owners may not be able to control lead in water,water sampling is not required for most lead-based paint risk assessments. Risk assessors should be prepared to conduct water sampling if the owner request it. Most lead in drinking water is introduced by plumbing system corrosion, not from groundwater. The EPA drinking water limit is 15 parts per billion (ppb). If the levels are greater than this, the EPA may require corrosion control treatment (usually implemented by the local water authority), source water treatment,public education and lead service line replacement. STREAM/WETLAND DELINEATION(NON-SCOPE) The presence of jurisdictional streams and wetlands may significantly limit the type and extent of development a parcel of land can support. Accordingly, ECS strongly recommends"up-front"field delineation and agency (USAGE, NCDWQ) verification of the wetland/stream jurisdictional boundaries on a proposed development site. When streams and wetlands are identified right away, sites can be designed to either avoid or facilitate the state/federal permitting requirements (Section 401, Section 404, Isolated Wetlands, Buffer Reviews, etc.). Our Raleigh Office has wetland scientists that can delineate jurisdictional stream/wetland boundaries on properties that are being considered for development. Then, as the project moves forward, our senior wetland staff works with the project team and the regulatory agencies to efficiently determine impacts, design mitigation plans and file permitting documents that meet project budgets and maintain construction schedules. 9