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top seal cap . <br /> 6 . Furnish and install a new 4 " fiberglass riser with <br /> cap assembly and 18" manhole for the interstitial <br /> sensor in the annular space of the tank . <br /> 7 . Furnish and install a Oilbarco TM-4 with 3 foot <br /> leak sensor in the piping sump and an interstitial <br /> sensor in the annular space at the existing <br /> underground tank as specified in the attached <br /> Exhibit A ( site data sheets ) . Install the TM-4 next <br /> to the existing tank monitor . All underground <br /> electrical work to conform to all applicable local , <br /> state , and federal codes . <br /> 8 . Furnish and install an ALC-20 strobe light and <br /> sound warning system , at the building wall closest <br /> to the tank , per specifications . <br /> 9 . After installation of all piping and related <br /> equipment as described above and in the attached <br /> specifications , after backfilling to sub--grade and <br /> in the presence of the US SPRINT representative and <br /> local governing official , petrotite the tank , <br /> fittings and all underground piping . Upon completion <br /> of the test report the findings to the ATEC <br /> representative . <br /> 10 . Finish backfilling the tank hole with approved <br /> granular material and repair or refinish all areas <br /> affected during construction to the condition of the <br /> adjoining surfaces in a manner suitable to good <br /> workmanship like practices . See the attached details <br /> for concrete specifications . <br /> 11 . properly dispose of all construction related debris <br /> and broom clean the site . <br />