1、Excavation Monitoring and ObservationAPI RECOMMENDED PRACTICE 1166FIRST EDITION,NOVEMBER 2005REAFFIRMED,NOVEMBER 2010 Excavation Monitoring and ObservationPipeline SegmentAPI RECOMMENDED PRACTICE 1166FIRST EDITION,NOVEMBER 2005REAFFIRMED,NOVEMBER 2010 SPECIAL NOTESAPI publications necessarily addres
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16、 and should be submitted to the Standards and Publications Department,API,1220 L Street,NW,Washington,DC 20005,standardsapi.org.iii CONTENTSPage1PURPOSE AND SCOPE.12DEFINITIONS.13DECISION NODES.18TASKS.2Figure 1FlowchartExcavation Monitoring and Observation .4v 1Excavation Monitoring and Observation1 Purpose and ScopeTo protect the public,excavation employees,and the environment by preventing damage to pipeline assets from excavation activ-ities.To provide a consistently applied decision making
