Electrical PVC Cement

My electrical contracting company is using PVC for underground applications(e.g. floorboxes). I assume that it should be characterized under the PVC welding VOC limits of 510g/L. I also assume that mechanical, electrical and plumbing contractors are not excluded from tracking the VOC products. If any of these assumptions are incorrect please let me know; furthermore, my concern is below. 1) Table 1 states "This table excludes adhesives and sealants integral to the water-proofing system or that are not building related." Is the sealant for underground PVC routing considered water-proofing and it is 'building related'? Thank you for any response, Landis