Specifications - City of Montpelier, Vermont

Title:Montpelier District HeatingCity of Montpelier, VT02180 – Drilling and BlastingIssue Date:September 28, 2012Page #:3 of 3C. Protect structures, utilities, sidewalks, pavements, and other facilities from potentialdamage caused by drilling and blasting and other hazards created by blasting operations.D. Protect subgrades and foundation soils against freezing temperatures or frost. Provideprotective insulating materials as necessary.3.2 CLASSIFICATIONA. Drilling and Blasting includes removal and disposal of rock material and obstructionsencountered that cannot be removed by heavyduty rock excavating equipment withoutsystematic drilling, blasting, or ripping. Rock material includes boulders larger than onecubic yard in volume which cannot be excavated without drilling and blasting, wedging,sledging or barring and rock in beds, ledges, unstratified masses, and conglomeratedeposits.B. Do not excavate rock until it has been classified and crosssectioned by Engineer.3.3 SAFETY OF DRILLING AND BLASTING OPERATIONSA. Comply with local codes, ordinances, and requirements of authorities having jurisdictionto maintain safe blasting worksites.3.4 APPROVAL OF SUBGRADEA. Notify Engineer when excavations have reached required subgrade.B. When Engineer determines that unforeseen unsatisfactory material is present, continueexcavation and replace with compacted backfill or fill material as directed.1. Unforeseen additional excavation and replacement material will be paid according tothe Contract provisions for changes in Work.END OF SECTION 02180DRILLING AND BLASTING 02180 3