Rental Return Your Name (required) Email / Phone (required) Seismograph Serial Numbers (required) Tracking Number 1. Return all shipments to DRW Associates 9261 Ravenna Rd. B-5 Twinsburg, Ohio 44087. 2. Rentals that are not shipped to this address will continue to be billed monthly until they are received by DRW Associates. 3. Any parts and accessories that were originally shipped with your rental such as geophone spikes, solar panels and charger cables will be billed if not returned with the same unit. 4. Please make sure to back up your event data and clean the equipment before returning it.