Laserfiche WebLink
y rw _~ _ Fes`:, ~ ~ '`.~z'-'m~txP" ,a~' r~^"waeP~ ~n'Hx'.~~ ~_ ~~ri-~~" ^ .~.T. .~.,,`"„" ~.y~c~`°"y~ wri rvry".'~i'cv <br />:5,~r^~~ _ ti w,~~„.:~r Y "1 . T' ~ ~ _ y.~. ~ ~ 'sti ~ '~ ~ µ ir' . ,~. y C-' d^' "~- 'J. <br />„~, ~ f ~'' ~ ~ .._ ~ ~~ -r ~ ~a "-~~..~-' day-~~~N•C` ~ ~` •'a~` _...~~,~~ ~" M ~ „f~.Z'"~~ ~ ~ ~,~a _~ <br />_ _ t ~~w.a- ~..- pa,,.,. ~~ ~~. ~~~ "~~..u.~r»A` Y?~" ~ ~"-~~:vKl I r:' F.e at. ~ '^i;~J.,-. L ~ 4. ek~~~L'1 y -~"r <br />~'~ ~~"ia~ ..~._r.,.,t....~.'^.,T..ixe~-a°:.«:v"~:.~:~ae'~ -•~~~- ,r~~' .+ ."a.~S~~.~]e.rr. y.,~,.,~~ 2e' <br />Rebecca Haug <br />City of Elk River <br />October 6, 209 <br />Page 2 <br />Emissions testing data was compared to historical levels and to existing permit requirements. <br />Emission parameters analyzed included dioxins and furans, hydrochloric acid ~HCL}, <br />particulate matter, nitrogen oxides ~C~}, sulfur dioxide ~Sa~}, carbon monoxide ~~~} and ten <br />metals. Certain parameters such as C~ and NQX were reduced and n7ost showed no signi~~cant <br />change from historical operations, <br />Two parameters were higher than typical past operations. These were zinc and sulfur dioxide. <br />Both zinc and sulfur are present in TDF in higher concentrations than RDF. Zinc en~issions are <br />currently not regulated by MPCA. Further 1VlPCA current air emission risl~ assessment <br />program does not establish a toxicity factor for zinc, The S~2 emissions, while higher than for <br />historical l0~% RDF firing, we~•e below the permitted en~ission rate. S0~ is currently <br />monitored by CrRF using a continuous emissions monitor, which is calibrated eve~•y day. Using <br />CEM data, the plant operators can adjust the TDF feed rate to control any S~~ exceedance <br />issues. <br />~n conclusion, some predicted emission increases and reductions from historical emissions <br />levels were recorded during the TDF test burn, None of the increases reached permitted limits, <br />State~of the~art controls and emissions monitoring devices are available to the GRE operational <br />staff. Based on the test burn ash and emissions analytical data, the proposed TDF feed rate, <br />current air emission permit and emissions monitoring system in place at the Ell{ River Station, <br />Liesch Ends no technical reason to deny the CUP request to co-fire TDF with RDF. <br />Should you have any questions, please contact me. Thanl~ you. <br />Sincerely, <br />L~E~C~ AS~~C~.ATES, :NC. <br />~.. <br />ohn Lichter, P.E. <br />Environmental Engineer <br />w:lezav1648131gre tdfreview ltz• 10 a 1 ~9.doc <br />www.liesch.com <br />THE ~IESCH CCIMPANIES ~ MINNEAPOLIS ~ CHICAGO ~ x.05 ANGELES MADISON ~ MILWAUKEE ~ PHOENIX <br />