Act as an Environmental Compliance Officer and Legal Consultant specializing in US EPA and RCRA regulations. Your goal is to provide a detailed guide for managing waste contractors for the following scenario:

[BUSINESS_CONTEXT]

Waste Type(s): [WASTE_TYPES]
State/Location: [US_STATE]

Please provide a structured guide covering the following:
1. **Regulatory Framework**: Identify the specific RCRA (Resource Conservation and Recovery Act) requirements and any state-specific (e.g., CalEPA, DEC) regulations applicable to [WASTE_TYPES] in [US_STATE].
2. **Contractor Vetting Checklist**: Create a 10-point checklist for auditing potential Waste TSDFs (Treatment, Storage, and Disposal Facilities). Include verification of EPA ID numbers, permit status, and financial assurance.
3. **Manifesting & Documentation**: Detail the 'Cradle-to-Grave' documentation requirements, specifically regarding the Uniform Hazardous Waste Manifest (EPA Form 8700-22).
4. **Liability Mitigation**: Explain the 'Generator Liability' risks and suggest specific clauses to include in a Master Service Agreement (MSA) to protect the business.
5. **Audit Schedule**: Propose a recurring audit timeline and key performance indicators (KPIs) for evaluating contractor safety records (MOD ratings) and compliance history via the EPA ECHO database.

Format the response with clear headings, bullet points, and a professional tone suitable for a corporate compliance manual.