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Blasting Ledge New methods and materials make blasting a more precise and safer technology. by Edward Akerley On Cape Ann, on the north shore of Massachusetts where we do much of our work, blasting for house foundations is standard procedure-ledge is everywhere. The demand for blasting is increasing in the rest of the Northeast as well, as prime building sites become more scarce and as improved materials and techniques make blasting a more versatile tool. On some sites, the best earth must go to the septic system and the house must go on the ledge. The cost of blasting is often recouped by the value a full foundation adds to the house. In other cases, blasting is required for utility