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1. Soil Gas Assessment: Required when volatile organic compounds are suspected or when investigating potential vapor intrusion

2. Asbestos Survey: Included when buildings are present on site or when historical information suggests potential asbestos presence

3. Groundwater Quality Assessment: Required when groundwater contamination is suspected or when site is located in a groundwater protection area

4. Ecological Assessment: Included when site is located near sensitive ecological receptors or protected areas

5. Building Materials Assessment: Required for properties with existing structures, particularly those built before 1994

6. PFAS Investigation: Included when site history suggests potential PFAS contamination or when required by regulatory authorities

1. Site Maps and Plans: Detailed site plans, sampling location maps, and regional context maps

2. Historical Documentation: Historical aerial photographs, old site plans, and historical property records

3. Photographic Log: Photographs documenting site conditions and areas of concern

4. Laboratory Reports: Complete laboratory analysis reports and chain of custody documentation

5. Regulatory Documentation: Copies of relevant permits, violations, and correspondence with regulatory agencies

6. Interview Records: Documentation of interviews with site owners, occupants, and other knowledgeable parties

7. Field Notes and Logs: Detailed field notes, boring logs, and sampling documentation

8. Quality Assurance Documentation: QA/QC procedures and results

9. Previous Reports: Relevant previous environmental reports or assessments