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EPA Building Air Quality Guide-1991

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108 Section 8 ences, it is useful to ask about long-term follow-up. After the contract was com- pleted, did the contractor remain in contact with the client to ensure that problems did not recur? Knowledge of Local Codes and Regional Climate Conditions Familiarity with State and local regulations and codes helps to avoid problems during mitigation. For example, in making changes to the HVAC system, it is impor- tant to conform to local building codes. Heating, cooling, and humidity control needs are different in different geographic regions, and can affect the selection of an appropriate mitigation approach. Getting assurances that all firms under consideration have this knowledge becomes particularly important if it becomes necessary to seek expertise from outside the local area. Cost It is impossible for this document to give specific guidance on the cost of profes- sional services. If projected costs jump suddenly during the investigation process, the consultants should be able to justify that added cost. The budget will be influenced by a number of factors, including: ■ complexity of the problem ■ size and complexity of the building and its HVAC system(s) ■ quality and extent of recordkeeping by building staff and management ■ type of report or other product required ■ number of meetings required (formal presentations can be quite expensive) ■ air sampling (e.g., use of instruments, laboratory analysis) if required

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