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Typical Pass/Fail Rates for "Existing " sites <br /> • FAILURE RATES (of completed tests) <br /> • ~30% for UDC sumps <br /> • ~25% for STP Sumps <br /> • ~20% for Product Piping Interstitials <br /> • ~2% for Double Wall Tank Interstitials <br /> • Actual failure rates may be higher <br /> • Tanknology conducted onsite troubleshooting <br /> and repairs to "pass" many systems <br /> • Many sites had preliminary surveys and repairs <br /> by maintenance & construction contractors <br /> *Tests of "new" installations have much higher passing rates. <br />