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• SOBIE AND ASSOCIATES, INC. PAGE 4 Paulson And Sons Inc . January 26 , 1993 Attention: Mr . Bill Paulson Re : Bill Paulson Quarry Blasting 3 . KPI The Company, upon our request , provided us with the physical characteristics of the pipeline . This office requested, for evaluation, from KPI specific limiting ground vibration data, which would be considered applicable to their pipeline operations . Such information has not been provided to date . The lack of response makes it extremely difficult to conscientiously attempt to meet the ILHR7 requirement stated previously and which suggests that responsible, professional and mutually acceptable criteria can be agreed upon based upon the input of the interested parties . In general , our experience is such that some petroleum pipeline owners and operators and utility companies , have in recent years , established specific blast vibration limits relative to blast vibrations . Examples of companies which we have been privileged to work with are as follows : a. Mississippi River Transmission Corp. b. Peoples Gas Company c . Belco Petroleum d. Universal Pipeline e . Natural Gas Pipeline Co . f . Commonwealth Edison Corp. g . Kansas City Power Co . In addition, we have also evaluated the effects of proposed blasting vibration effects on buried high pressure pipelines which are owned by: A. West Shore Pipeline Corp. B. Northern Illinois Gas Co . In general , all of the above projects have limited ground vibration intensity to a PPV of 2 . 0 to 2 . 5 inches per second, as measured on the ground above the pipeline or on the pipeline itself. In some cases alternate criteria were also established, however, a limiting PPV, was for practical purposes , very success- ful as a control device . On some projects , it has been found that a limiting value PPV of 5 . 0 to 7 . 0 inches per second was applicable to pipeline safety. It may be of interest to note that SAFE blasting can be and is routinely conducted in close proximity to high pressure buried pipelines . Literally, miles of bedrock has been blasted to accomodate new pipeline installation on easement and pipeline right of way which contain in service , fully operational , exist- ing pipelines which parallel the new line being emplaced. Our office has routinely monitored quarry blasting operations located relatively close to existing , in service pipelines .