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i <br /> PG&E STK . MKTG, 1D -20994'91460 OCT 01 '917 14 : 14 No .007 P .01. <br /> Paalflc No and Electric Comp oy S rN Wan Division <br /> 4 tft l v <br /> rl D,Bx 530 <br /> S rg Mori,CA%,?91 <br /> A2.17?8 <br /> VIA TBLI3COPIEO&L nrand 1q)(lranamiitai momo <br /> 71 "^►p + , • - <br /> min <br /> R <br /> October 1, 19 <br /> Mr. Iaffy 71tsworth <br /> Plant Atlglneer <br /> P. O. Base 108 <br /> SWC)LIM, (Witbimiu 93203 <br /> Dear Wry: <br /> This letter is in respansa to ym r I iquiry rigarding the existence of PCS in <br /> taamsformers at Union Ice on t320 West Weber Avenue, sk"mon. <br /> All o ochicat equipment coata4 tin50 ppm or more PCBs is regulated by the U. S. <br /> Bnvimmental Praw6on (EIPA) (Pifty ppm is 50 parts of PCBs in <br /> l►000)OW Parts of insulating it ' .� tribution transformers" now used in <br /> P04113's electrical system con n it insulating fluid. However, due to the <br /> actettsive use of MRS in the t, some 4 if these transformers wage contaminated <br /> with tie smtntnts of PCBs d 'n rn rAure or maim+ranee. I,lnlesa the <br /> transom have boon tested, PC kE h i w way of knowing the PCB omtent. Per <br /> EPA requirements, transformer 5 whossee, 11 concentration is unknown am assumed <br /> W contain PGB at a cancmtrati n ibove Q ppm , but below 500 ppm, <br /> Please note, however, that indua sury of min" oil filled "distribution <br /> itarfsfionnors* have shown that i 3v r 904 ntain less than 50 ppm PCBs (.005% or <br /> ku d= 1 Wmxpoon of POk in gallo f insulating fluid) and less than 1 t% <br /> contains more than 5000 ppm (,(S or l pQan in 2 112 gallons). Although only <br /> 10% wntRin 50 plan or more, s ny spill o F ' eral oil from "distribution <br /> mmsfotmers" is treated as a PC B spill and leaned up=wrdhWjy, union tests show <br /> it to be otherwise. <br /> PG&E will, sit no charge, visas ly inspec y transformer and replace or repair it if <br /> it is leaking. If it is in sound o ' g cA i dition, it poses no health risk and thrre is <br /> no need to replace it. However ' you 3 l desim a taborawry analysis of the <br /> insulating fluid to detemike if i ac contaminated with Mb, PG&E will <br /> eG IOC NDi>--,015 331 NOINrI 110S 61VE; 60C C-90 90-01-1,661 <br />