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[l�J L7-92 09:02AM <br />�. <br />A <br />larw V0 <br />FROM REGI CAL E. F. A. <br />T) 220940,40130P003/np= <br />10 <br />CIRCUIT WORKS, INC. <br />PRINTED CIRCUIT BOARDS/ BACKPAN ELS <br />L7hefourth-process is the backpanel degreaser which uses a mixture of <br />hlortrifluoroethane and methanol as the solvent. The waste stream <br />this process is also mixed with the reflow oil as above and the <br />fests and profiles from Romic are again in the above location..' <br />anifests-; profiles, and permits -are available for your review.. <br />Items 7) Sampling of press cooling water... <br />Th i s water 'i s used by the hydrau 1. i c presses .for coo 1 ing of the p I atens after, <br />the thermal rise process is completed. 'The water is not in contact with any <br />hazardous substance at any, time, and has been sampled in the past- to <br />determine if there are any hazardous components. All previous sampling <br />confirmed the stream as nonhazardous and therefore no further sampling.was <br />done. We feel that sampling of this stream is not warranted, And Ms.' Rhonda <br />Archbold of your office has agreed with us on this point. However, if you <br />feel confirmation of this stream.as nonhazardous is inadequate, we will do <br />additional sampling as required to provide data for your determinations. <br />Item 2) Labeling of pretreatment area piping_,. <br />This item is in progress. Labels are on order and we expect to receive these <br />within a week. We expect to complete the labeling of the piping within one <br />week of receiving t�-,e labels. <br />Item 1) Piping blueprints... <br />a) -We have the "as bui It" prints on file in the maintenance area. Copies are . <br />being -ma I deand will be supplied to your office.within the next few .days. <br />b} The treatment area prints are being reviewed for accuracy and will.be <br />updated if necessary and copies supplied to' -your office within. one week. <br />]rem 6) Storage area - capacity for 25 year storm.,.. <br />This .item is being review .by Facilities and Engineering in conjunction with <br />Ms. Ar chi, o 1 d . We will provide you with ` a schedule for . upgr ad ing. . the <br />capacity if requir__ed_,no later. than Apri 1 30. This should riot be a. rob .i:o <br />complete, however. we resp'ectf u 1 1 y request. 'th i s, additional two weeks tvsubmit. <br />- schedule if .necessary. .. _; .. <br />Item 3). Air compressor oil containment.... <br />Pacilitias is�in progress on this item. Containment trays are'being quoted. <br />and. we w i 1 1 have a; decision on "'make or buy no. -later than .Apr i 1 17. - we will <br />provide evidence of the ' purchase of mater i a l_s or p l acement.. of contract for <br />the -item no later- than Apr.i l 22. <br />152 FRANK WEST CIRCLE • STOCKTON, CA 95206.(209)983-'0760 • TELEX 3724097. FAX (209)9E33-0257 <br />