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corrpro� HAYWARD OFFICE <br /> 20991 Cabot Blvd, Hayward,CA 94545 <br /> anAEGIONcompany 510.614.88001 www,corrpro.corn <br /> Steve Kludt May 7, 2015 <br /> E.F. Kludt and Sons, Inc. <br /> 1126 East Pine Street <br /> Lodi, CA 95242 <br /> Phone: (209) 368-0634 <br /> Email: steve@kludtoil.com <br /> Subject: Triennial Cathodic Protection System UST Certification Survey (2015) <br /> E.F. Kludt and Sons, Inc. —1126 East Pine Street, Lodi, CA <br /> Dear Mr. Kludt: <br /> On April 29, 2015, Corrpro conducted the cathodic protection (CP) system surrey of two <br /> underground storage tanks (USTs) located at E.F. Kludt and Sons, Inc. in Lodi, California. The <br /> purpose of this survey was to assess the adequacy of cathodic protection for the tanks at the <br /> survey locations referenced. Continuity measurements, galvanic anode output, and structure- <br /> to-electrolyte potential data obtained during this survey is attached to this document. <br /> Summary <br /> The findings of the above referenced survey are as follows: � _ <br /> Date of Survey: April 29, 2015 F "j FI VF.L <br /> Structures: Two Underground Storage Tanks MAY 0 7 201D <br /> Certification Criteria Met: Yes ENVIRONMENTAL. <br /> Next Survey Due: April 2018 HFQITy naD80TAIACKIT <br /> System Description and Test Procedures <br /> Two underground storage tanks provide racing fuel and dyed red kerosene for E.F. Kludt and <br /> Sons, Inc. The tanks are protected by a galvanic anode CP system, consisting of nine (9) <br /> galvanic anodes connected to the tank structure connections through a 0.01 ohm shunt. <br /> • Structure-to-Electrolyte Potential Survey — The "On" and "Instant-off' measurements were <br /> obtained using a calibrated high impedance voltmeter. This was done by connecting a lead <br /> between a portable copper-copper sulfate (Cu/CuSO4) reference electrode and the negative <br /> terminal of the voltmeter. The positive connection necessary to complete the measuring <br /> circuit was made by directly contacting the structure under test. Interrupted potential <br /> measurements were obtained by installing a current interrupter into galvanic anode cathodic <br /> protection system circuit and interrupting the current. These readings were recorded with <br /> the system operating ("On") and with the current instantaneously interrupted ("Instant Off'). <br /> These measurements were then compared against the below NACE International criteria to <br /> determine if the structures were receiving adequate levels of cathodic protection: <br /> Project No.340571048 Page 7 of 5 <br />