Which of the following is NOT a primary focus of API Recommended Practice 588?

The primary focus of API Recommended Practice 588 is centered around the quality, procedures, and personnel involved in source inspection. It emphasizes establishing minimum quality standards for materials and workmanship, providing guidance on source inspection practices for equipment, and outlining the necessary training for personnel involved in inspection tasks.

Assessing environmental impacts of inspections, while important in many contexts, is not a principal focus of this specific API document. The emphasis is predominantly on ensuring quality and compliance in manufacturing processes rather than evaluating the environmental aspects associated with those inspections. Therefore, the correct answer highlights that assessing environmental impacts is outside the primary scope of API Recommended Practice 588.