REG NASA-LLIS-0859-1999 Lessons Learned Facilities Complete Contract Specs Requirements.pdf

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1、Lessons Learned Entry: 0859Lesson Info:a71 Lesson Number: 0859a71 Lesson Date: 1999-08-23a71 Submitting Organization: GRCa71 Submitted by: Joe MorrisSubject: Facilities, Complete Contract Specs. Requirements Description of Driving Event: A water line coming into a building was being increased in siz

2、e to accommodate a new building sprinkler system. The excavation was done, but the compaction that should have been done was not.The specification of backfilling was not part of the contract documents.Lesson(s) Learned: There is more to filling up a hole that just throwing the dirt back into it. Com

3、paction is very important and if it is not done properly, the dirt will settle and you will be left with a big sinkhole.Recommendation(s): There is more to filling up a hole that just throwing the dirt back into it. Compaction is very important and if it is not done properly, the dirt will settle an

4、d you will be left with a big sinkhole.Evidence of Recurrence Control Effectiveness: N/ADocuments Related to Lesson: N/AMission Directorate(s): Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-N/AAdditional Key Phrase(s): a71 Administration/Organizati

5、ona71 Environmenta71 Facilitiesa71 Fire ProtectionAdditional Info: Approval Info: a71 Approval Date: 2000-06-5a71 Approval Name: Eric Raynora71 Approval Organization: QSa71 Approval Phone Number: 202-358-4738Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-