Because we don’t own the rental cars!
The same goes with writing environmental plans. If the employees who are responsible for implementing the plan (SPCC, stormwater, RCRA contingency, etc.) have not been involved in the development and preparation of the plans in any way, they are not going to have ownership of the plans and they are not likely to implement them.
Remember: Many of these plans (especially SPCC) are perfromance-based. That means if they are not implemented as written, you can end up with a violation.
Get your employees involved in some fashion before you finalize your palns. Have them review the draft. Get them involved.