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INC. 2766 POMONA BLVD,, POMONA, CA 91768.3222 PHONE (909) 594.9850 FFAX (909; 594.6169 <br />November 15, 2005 <br />Verizon California, Inc. <br />Re: Cathodic Protection System Survey for the 6,000 — gallon underground storage tank <br />located at Manteca CO, 430 W. Center St., Manteca, CA 95336. <br />Dear Sir or Madam: <br />The cathodic protection (CP) system includes magnesium anodes connected through a <br />test station to the underground fuel tank, piping, tank hold down straps, and anchoring <br />system. <br />The survey was conducted by measuring the structure to soil potentials at all locations <br />described on the attached data sheet. Each potential was measured with and without <br />protective current. We used a digital multi -meter connected between the test points and a <br />saturated copper/copper sulfate CUCuSO4 reference electrode in contact with the earth. <br />The potentials recorded exceed the minimum of —850 millivolts (mV) as specified by the <br />National Association of Corrosion Engineers. <br />This survey was conducted in accordance with the procedures and test methods described <br />in the National Association of Corrosion Engineers (MACE) Standard Recommended <br />Practice RP -0285-95, Corrosion Control of Underground Storage Tank Systems by <br />Cathodic Protection and American Petroleum Institute Recommended Practice 1632 <br />entitled Cathodic Protection of Underground Petroleum Storage Tanks and Piping <br />systems. <br />SunWest Engineering Constructors, Inc. appreciates the opportunity to assist you in this <br />phase of your corrosion mitigation program. If you have any questions, please contact <br />Byran G. Shipley at (909) 594-9850 Ext. 18 at your convenience. <br />Thank you, <br />�y <br />ran (Barney) Shipley <br />I hereby certify that I am responsible for the review and certification of the services <br />described in this document and for the preparation of this document. The services <br />described in this document have been provided in a manner consistent with the current <br />standards of the profession and to the best of my knowledge comply with apple �P N %N - <br />cal statutes, regulations and ordinances.' �6D ...... <br />w?' NACE ,oz�` <br />`.�JAY .M..SHIPLEY <br />...�, s <br />I� 4193 i <br />1 <br />i <br />