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54 Table continued from p.53 Respondent Response Virginia We patch delaminated epoxy membranes with new epoxy. Washington Any torn or cut areas, or narrow overlaps, shall be patched using a satisfactory adhesive and by placing sections of the mem- brane over the defective area in such a manner that the patch extends at least 6 in. beyond the defect. The patch shall be rolled or firmly pressed onto the surface. Wyoming See Question 7 Alberta No. Repair would consist of full removal of failed area and re-application conforming to specification requirements. New Brunswick As per manufacturers recommendations Ontario We do not have requirements for repair. Depending on the nature and severity of the deficiency, our specifications provide for financial penalty, or removal and replacement of the membrane. See OPS 914. Quebec No except during first installation. 11. RESEARCH 22. Has your agency used any non-destructive testing to assess the condition of the in-place waterproofing membranes? Yes: 7 agencies No: 23 agencies If Yes, what method was used? The following non-destructive test methods were reported: Electrical conductivity Ground penetrating radar Electrical resistivity Chain drag or hammer sounding Visual inspection Leak testing Was the method reliable? Yes: 4 agencies No: 3 agencies The methods identified as being reliable were chain drag or hammer sounding, visual inspection, and leak testing. The methods identified as being unreliable were electrical conductivity, electrical resistivity, and ground penetrating radar. 23. Has your agency sponsored field studies or research on the performance of waterproofing membranes? Yes: 7 agencies No: 30 agencies If reports are available, please supply a reference or source (person or website link) for further information, or a copy of the report. The following research reports were listed: Bridge Deck Restoration Methods and Procedures, Report No. FHWA/CA/SD-79/19. Boisvert, D.M., Evaluation of the Bond between Barrier Membrane and Concrete Bridge Decks, Draft Report No. FHWA-NH- RD-12323G, January 2003, Draft report was not published . New Brunswick Reports: 2005 CON-05-1208 Audit of Bridge Deck Waterproofing Systems 2005 CON-05-1201 Review of Hot-Pour Waterproofing on Bridge Decks