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Brady Environmental Services, Inc. <br />1.1.7 Final Cleaning <br />1.1.7.1 Following the completion of gross removal, <br />contractor shall perform final cleaning activities <br />involving wet wiping and HEPA vac operations. <br />Upon completion, the inner poly shall be removed <br />and additional cleaning performed as necessary. <br />Critical barriers shall remain until final clearance is <br />passed for each containment. <br />1.1.7.2 The final visual inspection shall be performed at the <br />contractor's request prior to clearance sampling. The <br />final visual inspection shall be performed by the <br />consultant's project manager. <br />1.1.8 Clearance <br />1.1.8.1 PCM clearance samples will be collected by <br />aggressive sampling methods. The samples will be <br />collected at the rate of 5 to 14 liters per minute on <br />0.8 micron MCE filters mounted in 25mm conductive <br />cassettes, at a height of 3 to 5 feet above the floor. <br />Sample volume shall be approximately 1,4001iters. <br />1.1.8.2 A total of three (3) samples will be collected <br />simultaneously inside each containment. <br />1.1.83 Clearance will be by Phase Contrast Microscopy <br />(PCM) analysis. Clearance will be achieved if each <br />of the inside samples are equal to or less than 0.01 <br />f/cc. <br />1.1.8.4 If clearance is not achieved on the first attempt, the <br />contractor will be required to re-clean and spray <br />lockdown in all areas as specified above. After the <br />first set of samples are collected and analyzed, <br />subsequent samples will be collected and analyzed <br />until clearance is complete. <br />cs09055 <br />- 000209 <br />