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MAR -30-99 TUE 06:28 PM 0 PRO COMPANIES INC FAX NO, 5101171 3698 P. 01/07 <br />frost-it'Fax Note 7671 n lc 3/3D/9 nAnc,)• <br />ra Stave Mud t F" Jim Eggenberger <br />Cnloupl. E.F.t 4, ,:pro ompana.esCorrp <br />Phnaotl rhona l) Corrpro <br />March 30, 1999 "KN (205) 368-8016 Fu#Companies <br />(510) 61[k-8811 Incorporates! <br />H.F. Kludt and Sons, Inc. <br />1126 East Pine Street <br />P.O. Box 166 <br />Lodi, CA 95241-0166 <br />FAX. (709) 368-9016 <br />Attention: Mr. Steve Kludt <br />I. _,.ornn11WWnr Ln EvcolAt.rrre <br />CCI #575-0727 <br />2799 M1lillvr tirrtn•i • ti:m fcan.lw, C:1'l.ii57 <br />Td: 01 V) 614AFY)o . N:,xI li1G)611 tlA 11 <br />E-ma;l: corrprnxjrTool.c,nu <br />Subject., UST Site - Cathodic Protection System Post -Installation Survey <br />1+:.F. Kludt and Sons, 1126 East Pine Street <br />Lodi, CA <br />Gentlemen. <br />Corrpro Companies has completed the design, materials supply and initial testing of the cathodic <br />protectlon system for the two steel underground fuel storage tanks (UST's) at the subject site. <br />The work was completed to comply with the EPA 1998 requirements for UST external corrosion <br />control, In brief the survey results indicate that the new cathodic protection system is fully <br />operational and that the subjoct UST's comply with industry criterion which satisfies EPA <br />requirements for external corrosion control, The survey results are discussed in detail in this <br />rc unt. <br />The subject location has two steel tanks, and fiberglass product piping, therefore the only LPA <br />requirement for corrosion protection is to provide cathodic protection to the tanks. Corrpro <br />Companies designed a galvanic anode cathodic protection system comprising nine (9), 201b <br />magnesium alloy anodes. <br />A structure=to-soil potential survey using local reference cell locations was completed at the <br />subject facility. StructuFe'40-soil potentials Were taken using the DC voltmeter circuit of a <br />high -impedance digital multimeter and a portable copper -capper sulfate reference electrode. <br />Potentials were recorded prior to system energizing (Static Potential) and repeated with the <br />cathodic protection system's anodes connected and again while momentarily disconnected. <br />An initial post -installation survey was carried out on 2/10/99, where it was found that the tanks <br />were electrically short circuited to electrical ground and to other structures by the steel UST vent <br />piping and also by electrical conduits from the turbines on each tank to the building. <br />Subsequently the turbines were electrically isolated from the tanks using dielectric insulating <br />iirmges on the turbine risers. The UST vents were electrically isolated from the steel -sided <br />building. A second site survey was carried out on 3/5/99 after the tank electrical isolation work <br />haJ been completed. <br />Nal MO. <br />11m;oa <br />I CYmolund <br />Bang Hong <br />Wine <br />RUdwk, <br />ansoam• <br />Dchal <br />Housim <br />MVAan9 <br />Oman Cl y <br />San k;eKiSm <br />Glaulnm on law <br />+Mvmaq lu <br />AuvaB� <br />n"'olt/ <br />oMhnn <br />Hpoolm <br />Lag%nr akl9 <br />AnGel <br />J <br />Milwaukee <br />Nhn <br />Penh <br />son Diego <br />Syil:no <br />Ifuly T,. <br />Goc,nu <br /><:Inc,gP <br />Edmouwn <br />F301;lun <br />J:Ikata <br />MrduYsla <br />O'lool' <br />Now Odoano <br />i <br />PPhotiix <br /><ran, <br />saauk <br />nm:nat <br />Mono <br />Wlieurna, <br />New Mk <br />P -=di^^ <br />5m9•Nore <br />Ingvo <br />Puha <br />Wq.,ylrrglcn, pC <br />