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Public reporting burden for the collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to a penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. ESPA will be implemented on the new generation of expendable launch vehicles, the Evolved Expendable Launch Vehicle-Medium (EELV-M) boosters. ESPA will provide a cost-effective means for launching up to six small satellites, plus a large primary payload, on a single booster, while minimizing added impacts on the primary payload. In fact, ESPA can improve the dynamic environment seen by the primary payload through the use of whole-spacecraft, passive isolation systems. Vibration or shock isolation systems will be available for primary payloads; shock isolation will be offered for all secondary spacecraft. With whole-spacecraft isolation for all payloads, the addition of secondary payloads to the launch stack is expected to be transparent to the primary payload dynamic environment. ESPA is expected to reduce the launch dynamic environment for all payloads while shrinking the cost of launching a small satellite to less than 5% of the cost of a dedicated launch vehicle.