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HomeMy WebLinkAbout2012-01-18 PACKET 08.C.REQUEST OF CITY COUNCIL ACTION COUNCIL AGENDA MEETING ITEM # DATE 1/18/12 PREPARED BY: Engineering Jennifer Levitt ORIGINATING DEPARTMENT STAFF AUTHOR COUNCIL ACTION REQUEST: Receive the attached Air Monitoring Report. STAFF RECOMMENDATION: It is recommended the Council receive the attached Air Monitoring Report. BUDGET IMPLICATION: BUDGETED AMOUNT ACTUAL AMOUNT ADVISORY COMMISSION ACTION DATE REVIEWED APPROVED DENIED ❑ PLANNING F ❑ ❑ [:1 PUBLIC SAFETY ❑ ❑ ❑ ❑ PUBLIC WORKS ❑ ❑ ❑ F PARKS AND RECREATION ❑ ❑ ❑ ❑ HUMAN SERVICES/RIGHTS ❑ ❑ ❑ F ECONOMIC DEV. AUTHORITY ❑ ❑ F 0 ENVIRONMENTAL COMM. 1/11112_ E ❑ ❑ SUPPORTING DOCUMENTS: F MEMO/LETTER: F RESOLUTION: ❑ ORDINANCE: ❑ ENGINEERING RECOMMENDATION: F LEGAL RECOMMENDATION: E OTHER: SEH Technical Memorandum, Thomas A. Henning, PE, CHMM ADMINISTRATORS COMMENTS: City Administrator Date COUNCIL ACTION TAKEN: EIAPPROVED F DENIED E]OTHER H:\COUNCIL FORMS\Council 1-18-12\Council Action Form Air Monitoring Program.doc A SEH TECHNICAL MEMORANDUM TO: Jennifer Levitt, PE, City of Cottage Grove FROM: Thomas A. Henning, PE, CHMM DATE: January 5, 2012 RE: Cottage Grove Ambient Air Monitoring - First Year (Baseline) Results SEH No. 113702 30.0 1.0 Purpose The City of Cottage Grove retained Short Elliott Hendrickson, Inc. (SEH) to conduct ambient air monitoring at a location near the 3M Cottage Grove ( "3M ") facility. The purpose of the monitoring is to measure annual concentrations of select metals and volatile organic compounds (VOC) near the incinerator operated at the 3M facility. 3M has proposed to process non -3M generated wastes in the incinerator. The monitoring is being conducted prior to this change to determine current conditions. The monitoring is proposed to continue if 3M accepts non -3M generated wastes so that the impacts of the change can be assessed. SEH conducted the ambient monitoring for the 12 -month period from October 2010 through September 2011. This memorandum presents the results of the first twelve months of monitoring (October 2010 through September 2011). 3M did not accept non -3M generated wastes during this period, so these results represent this "baseline" condition. Monitoring will be restarted if 3M begins accepting non -3M generated wastes and may continue for one or two additional years. 2.0 Monitor Location Selection SEH staff worked with 3M staff, representatives of the Minnesota Pollution Control Agency (MPCA) and the City of Cottage Grove to select a location for the monitoring. The selected site is located northwest of the incinerator stack on 3M property (inside the facility fence). The selected site met each of the following site selection criteria: 1) Located on 3M property so access and security are provided 2) Power is accessible to the site 3) Provides acceptable distances from sources of background emissions (i.e. highways, industrial facilities, etc.) 4) Location is in line with prevailing wind direction from the incinerator stack 5) The distance from the incinerator stack to the sampling location is approximately equal to the distance from the incinerator stack to the nearest residence. 3.0 Methods The sampling and analytical methods used where selected to match ambient monitoring methods used by the MPCA at monitoring stations throughout the Twin Cities metropolitan area. This methodology was used so that the results of the monitoring near the 3M facility can be compared to the MPCA's Twin Cities metropolitan area monitoring data. Short Elliott Hendrickson Inc., 3535 Vadnais Center Drive, St. Paul, MN 55110 -5196 SEH is an equal opportunity employer I www.sehine.com 1 651.490.2000 1 600.325.2055 1 651.490.2150 fax Cottage Grove Ambient Air Monitoring - First Year (Baseline) Results January 5, 2012 Page 2 In general, samples are collected every 12` day so that samples are collected on the same days that sampling occurs for the MPCA monitoring. The twelve day sampling cycle ensures that over the course of the sampling program, samples will be collected on each day of the week. Periodically, SEH collected a sample on the 6` or 18 "' day to randomize the sample days. A high volume sampler is used to collect 24 -hour total suspended particulate (TSP) samples. The sampler turns on at midnight of the sampling day and blows ambient air across a filter for 24 hours. The filter is analyzed for TSP and fifteen metals. At the same time, a summa canister with a regulator is used to collect a 24 -hour sample that will be analyzed for individual VOCs. Collected samples are analyzed at Pace Analytical Laboratory. Filters used with the high volume sampler are prepared and processed according to the U.S. Environmental Protection Agency (USEPA) Compendium Method I0-3.1 (USEPA, 1999) as applicable for gravimetric determination. This method describes the numbering, pre -field tare weighing of filters, and post -field final weighing of filters. Pre -field filters are conditioned in a room of constant humidity and temperature and are gravimetrically tarred. After air samples have been collected, the filters are returned to the laboratory and conditioned as before and weighed. Filter handling procedures found in Appendix J of 40 CFR Part 50 will also be followed. VOCs are collected and analyzed using EPA method TO -] 5 procedures. Six liter summa canisters sanitized and place under vacuum at or greater to 25 inches mercury are used to collect the VOC samples. Table 1 shows the monitoring program's analytical methods, sampling equipment, target metals and individual VOCs. Table 1. Methods and Equipment Com ound Test Method Sampling Equipment Total Particulates EPA Method I0-3.1 Tisch TE -5170V Metals' EPA Method I0-3.4 Tisch TE -5170V Volatile Organic Compounds EPA Method TO-15 Summa Canister with a Tisch TE- 123flow controller Notes: Individual metals monitored include: Antimony Cadmium Copper Manganese Arsenic Chromium Iron Nickel Beryllium Cobalt Lead Selenium 2 Individual VOCs are listed on Tables 3 and 4. SEH developed a quality assurance and quality control (QA /QC) program to help ensure monitoring results are accurate and precise. QA /QC procedures include collecting field and method blanks, and periodically splitting samples with the MPCA. These steps provide a check that contaminates are not introduced during the sample collection, handling or analytical procedures. Cottage Grove Ambient Air Monitoring - First Year (Baseline) Results January 5, 2012 Page 3 4.0 Weather Conditions Weather conditions for each sampling date are collected and recorded at the meteorological station located at the 3M Cottage Grove facility. A broad range of data is collected at the station. On Table 2 we provide a summary of wind speed and direction, temperature, and precipitation on the sampling days. The raw meteorological data is included in Attachment A. 5.0 Results and Discussion The results of the monitoring conducted from October 2010 through September 2011 at the Cottage Grove monitoring site are shown on Table J. We show the results of each compound for each monitoring day and the annual average concentrations. When a measured concentration was at or below the methods detection limit we used the "estimated concentration" (if provided by the laboratory) or '/z the detection limit, if no estimated concentration was provided. 5.1 Compounds Not Detected A total of 54 VOCs and 12 metals were monitored throughout the year. Of this total, 29 VOCs and 2 metals (i.e. over half of the total) were not detected in any of the 27 samples. In addition, three additional compounds were only detected in one of the 27 sampling events; and in each case, the concentration was very near the detection limit. The compounds not detected are shown on Table 4. Table 4. Compounds Not Detected in Samples Compounds not Detected Antimony Dichlorobenzene (m) Beryllium Dichlorobenzene (o) 1,1,2,2- 'petrachloroethane Dichlorobenzene (p) 1,1, 2,3,4,4- Hexachloro -1,3- butadiene Dichlorotetrafluoroethane (Freon 114) 1,1,2- Trichloroethane Ethyl Chloride 1,1- Dichloroethane Ethylene Chloride 1, 1 -Dichloroethene Ethylene Dibromide 1,2,4- trichlorobenzene Methyl Bromide 1,2- Dichloropropane Methyl Chloroform 1,3- Butadiene Methyl tert -butyl Ether Benzyl Chloride Trans- l,2- dichloroethene Bromodichloromethane trans- l,3- dichloropropene Chlorobenzene Tribromomethane cis -1,2- Dichloroethene Trichlorofluoromethane cis- 1,3- Dichloropropene Vinyl Chloride Dibromochloromethane 5.2 Comparison with Health Benchmarks and Ambient Standards The monitoring shows that, for the compounds monitored, the air quality in Cottage Grove meets Minnesota health benchmarks and state ambient air quality standards. Table 4 shows the average monitored concentration for each compound and the associated state benchmark or state ambient standard. The MPCA defines health benchmarks for ambient air on the MPCA website (www.pca.state.mn.us / , click on the "Glossary" link): Cottage Grove Ambient Air Monitoring - First Year (Baseline) Results January 5, 2012 Page 4 A level of chemical concentration in ambient air, at or below which a chemical or defined mixture of chemicals is not likely to cause an adverse health effect to the general public when exposure occurs over a prescribed period of time. 5.3 Comparison with MPCA Monitoring Data The first year's ambient monitoring results are generally comparable with background ambient air concentrations measured throughout the Twin Cities (Note: The MPCA operates monitors located throughout the Twin Cities and the State of Minnesota. The MPCA monitoring locations are shown on Figure 1). The results of the monitoring conducted from October 2010 through September 2011 are shown on Table 5. Care should be taken to not emphasize a single sample result because laboratory or other errors can result in outliers that do not reflect actual ambient concentrations. A more relevant assessment is an analysis of longer term trends and averages. 5.3.1 Particulate Matter The average particulate matter (PM) concentration monitored at the Cottage Grove monitoring location is lower than Minnesota's primary ambient air quality standard for PM. The monitored PM concentration averaged 23.9 micrograms per cubic meter (ug/m at the Cottage Grove location while the ambient air quality standard is 260 ug/m The average monitored concentration is also less than the average concentration from the MPCA's Twin Cities monitoring locations, 28.9 ug /m 5.3.2 Metals Monitored concentrations of metals are all below their respective health benchmarks. Several metals including, antimony, arsenic, beryllium, cobalt and nickel, were infrequently detected and when detected, concentrates were near their detection limits. Iron, copper, and chromium do not have health benchmarks. Figures 2 through 4 show the results of lead, manganese and selenium monitoring at the Cottage Grove monitor and compare the results with MPCA monitoring results. 5.3.3 Volatile Organic Compounds Monitored average concentrations of VOCs are all below their respective health benchmarks. Several VOCs were never measured above their detection limits (see Table 2). Six VOCs were consistently detected at the Cottage Grove monitoring station: carbon disulfide, Freon 12, hexane, methyl chloride, methyl ethyl ketone, and toluene. On Figures 5 through 11 we compare the concentrations of these seven compounds with concentrations measured at other Twin Cities monitoring stations. All measurements are below their respective health benchmarks. Average concentrations of Freon 12, hexane, and methyl chloride are each near the average concentrations monitored at the MPCA monitoring stations. The results of toluene and methyl ethyl ketone are both dominated by a single high measured value. A concentration of 102 ug/m of methyl ethyl ketone was measured on December 28, 2010 and 49.9 ug/m of toluene was measured on August 19, 2011. Both of these values are well below their respective health benchmarks. SEH contacted 3M to team if an upset had occurred with the operation of the incinerator on either of these dates. The incinerator and the incinerator's pollution control equipment operated normally on December 28, 2010. On August 19, 2011, a failure of a water pump associated with the incinerator's scrubber caused an automatic shutoff of the feed to the incinerator. This condition lasted about 30 minutes. During this time the incinerator combustion temperature was maintained and all pollution control equipment remained operational. It is unlikely that this condition caused an excess of toluene or any other organic compound Cottage Grove Ambient Air Monitoring - First Year (Baseline) Results January 5, 2012 Page 5 emissions because combustion temperatures were maintained in the incinerator. Further, monitored metal concentrations are not elevated on August 19. Therefore, this condition likely did not cause excess metal emissions. We are evaluating potential sources of carbon disulfide in the area. The 3M plant is not expected to be a significant source of carbon disulfide emissions. Carbon disulfide is commonly formed as a byproduct of combustion of a fuel that contains significant quantities of sulfur. These fuels might be coal, residual or unrefined oil, or a biogas such as landfill gas or digester gas. Attachments: MPCA Monitoring Locations Table 2. Weather Data for Cottage Grove Monitoring Station Table 3. Cottage Grove Monitoring Results Table 5. Comparison with Health Benchmarks Figure I MPCA Monitoring Locations Figure 2 Total Suspended Particulates Figure 3 Lead Figure 4 Manganese Figure 5 Selenium Figure 6 Carbon Disulfide Figure 7 Freon 12 Figure 8 Hexane Figure 9 Methyl Chloride Figure 10 Methyl Ethyl Ketone Figure 11 Toluene Appendix A. Meteorological Data c: Katie Hill Brandt, SEH TAH /tah/KHB; m \ao \c \w�tg\ 113003 \envimnmentel \publisM1ed vesutn\fi lyaav rasulfs manic \dec ROil_teohmemo 0l0il2.duc,': Table 2. Weather Data For Cottage Grove Monitoring Station Source: 3M Weather Station Date Wind Direction from" Average Wind Speed, mph Range Wind Speed, mph Average Temp degrees F Precipitation Inches 10/11/2010 SE 3.1 0.5 to 10.0 60 0.0 10/23/2010 E 5.3 1.9 to 14.1 55 0.0 11/412010 W 13.6 4.3 to 28.5 41 0.0 11/16/2010 S 6.9 3.0 to 13.2 33 0.0 12/4/2010 W 8.3 4.7 to 17.7 21 0.1 12/16/2010 SW 5.5 3.4 to 40.5 17 0.0 12/28/2010 SE 4.9 0 to 9.7 21 0.0 1/9/2011 E 4.0 0.5 to 267 2 0.0 1/21/2011 SE 4.6 0to14.0 -6 0.0 2/2/2011 W 10.6 1.6 to 30.1 2 0.0 2/14/2011 W 9.4 1.7 to 33.9 36 0.0 2/26/2011 S 4.3 2.0 to 34.2 1 0.1 3/1012011 W 7.1 0.6 to 14.7 29 0.0 3/22/2011 E 17.4 4.2 to 36.3 36 1.1 4/3/2011 SE 7.7 0 to 22.1 45 0.0 4/15/2011 E 171 5.5 to 35.7 40 0.1 5/612011 SW 3.5 0.7 to 11.6 55 0.0 5/21/2011 E 8.6 3.6 to 17.9 64 1.7 6/2/2011 E 10.5 2.2 to 22.0 1 64 0.0 6/17/2011 E 6.2 2.3 to 16.5 70 0.8 6/26/2011 SE 6.4 2.0 to 14.4 69 0.0 7/8/2011 SE 3.9 1.0 to 17.1 78 0.0 7/26/2011 E 6.6 1.7 to 13.1 74 0.0 8/19/2011 SW 6.5 2.0 to 20.1 70 0.0 9/9/2011 SE 4.2 0.7 to 14.9 70 0.0 9/18/2011 S 6.0 1.3 to 14.3 56 0.2 9/30/2011 W 10.8 1 4.6 to 21.0 1 53 0.0 A Wind direction based on average readings at the 3M Weather Station for each day of monitoring. e Source: National Weather Service Weather Forcast Office, Daily Weather Observations for the Twin Cities, MN ( http:// www. crh. noaa. gov /mpx/Climate /MSPClimate.php) M en M M ti � n y � 0 oovotioo voo�vl N m N O N mn O O m�.- N +. 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"i iyivix js�: c 0 >' E O L o E N E o x �) N ( ° ( L u ( v c 3 o o o E ,-. o v o c v L T v ° O C� N U L V O V O U_ O C j c J G.Z v° V1 � .-1 N QGI U 6 V V 0 y�� W S S �I� 3 v O — 6 j � a S u S y 3 G O p� C N as O O `o a a m ° c a ° G 3 Q E O E _ E o G � o v v « ° 0 0 m m a N � � S y a C u O L N O q v m O I t W G ° O v a ro c ° ° ° c a v m ° T N V' O Z Figures 1 through 11 { q It i .n.... 3 � P Ypp 1300 ® J e� 7549 r ;3401? 1 i r r' 7555 Carbonyls w.. � r s _ r { o Mlies 0 30 60 90 60201 � r 1 # 907.T, 4461W 966 r 868 81, 250 961 - 38 43 v 465 20 ®Miles 423 ' . •" .,. �, %? 443 42 i 0 S 10 15 470' Figure 1 Short Elliott Hendrickson, Inc. MPCA Air Monitoring Stations for Toxics H i °Q A E J 46 CL 13 s j cn A'�P s /aGG O �h ' d Pa ,l /� S N mo d / aab N 0 sa S hp v O s ad Yd ^ to y A � 0 4 b1410 P�P� +�+ E v ° N % d pi m O ro Ln y' C. 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O C1 s v °• �° a Z d 9 C m o 1— S a te' rl rl a s °�✓ bD s Sa �� J a O O O O O O Appendix A. Meteorological Data @ M MN( M O � r( "'.W 00000�- OJ �000000 ( � N C O m (D (D 0� 7 W M N V LD O D) n N W 7 M O� Y t0 N a a a aM� W M(D V (D W n q W (O Q N N N N (D W W M It .- (D (D ,? D) W W g 7� . N �- N M M V M O C_ 0 O C M IT M S U r- 07� -NNN V'(O O)M V M(OMnaMUO N� D7 M N W W W cp W W W 07 M W W W W N N N W W W D�j � d)a)a)OOO) 000001 O) O) O) O) W O)O Q)OOO a �8 2 0 1 1 N q LL� N W V V V O h M n LL) m It 0 n N V �iO M(V (V NOtD 6i (V �JMOO n nnnnn (O ( h�� N S C_ O D? W v n V' V <t n co (D (D M 0 V �i0 � t0 tD t0 O0 tD ci' (O t0 t0 � � N� NtD tD tD tD tD � 0 L U MAO N W d; V V O n n V' W MO'- n(D O)nNd' � �n in �D (D U�(D v�D mcOn nnnnnmm (D _� a E n M V M N M O) n (O O n N V' N �'�OMNNNO( O)N�jMnO��., cDMOm v � O 0 0 0 0 0 0 0 0 �ij 0 0 i 0 0 0 0 0 0 0 0 0 l O O O O O O O O O O O O O O O O O N a a N . 0 41 V rn V N V O rn rn N N O r M .- M M V F M V to N N N N V Ci r` V �� CM •- � N O N r Y f6 N a a a 6 4 `"' N N M M V d' N N O> rn Q N N rn V M N N rn V N N M m M M (p (p 0 V N N m M V V m C) N m h" (O S C S V rn V N N� M N O N N to M rn O V (D N O N rn S N V M M - N M M N O M N M rn u� 7 N rn rn N h 7 N N � OOOO NOOOrn rn rn rnn rn �.,��0 W r N NOJ p� �' rn rn m m rn rn rn rn rn rn w m rn rn m m rn m m rn rn m m d Z i5 5 O x d N 1� rn N N rr M N'1� rn N r- V 07 .- r N N N q N V M N N V t N N E N N N N t ( C f MN N N 2 C N M i , N N r rn r` V O N rn O> W f N M V I-� tD m m M M to V V O O O N N N o L U N t,� N V N I- O? N V N (O N .- S 6 N O af 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 N 61 O N M O Q O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 w F 0 N 0 N 0 N 0 N 0 N 0000000000 N N N N N N N N N N 0 N 00000000 N N N N N N N N Q N N N N N N N N M N N N N N M M N N M N N M M N ❑ N O N O N O N O N O N O N O N O N 600000000 N N N N N N N N N O N O N 66000 N N N N a LL' . . . . .�Oh may 7 M M t6 N EL V' N N tD 4O d' fD O O L41 M 0 7 N h M 6. r ����.h NN. -.-N 0 0 c - M O Q N N to N h M 01 n , tC1 M t0 M M N N Q1 M h m 'per N � r S C 7 NN �-N T'if M hMO OMM O)M d' � M MO W (0 A N M O M N M M M N M V' M N M M M M V' M N M V M N M h M tO M C M M M �fl M M M M M S C S N M to N a M 47 t0 M d: V (O N <t Nh h Mhhh p� t� h MM000OJ 0100000 0 p� N e M W M O M W M W M W M 01 01 M 01 M m M 0 0 M O M W M 01 M OJ M O M O M m 01 m W 0 W O m W m O a a_ o o N f0 V; M h h C.1 M 0 V' N L6 O V' M M V O p m O N N V V M y O c0 M NJ mm N C h M Lq N 7 N I O'r� M h V MU� h O N L M 7 h 7 N a N V' M 0i N t0 M M M mm M M M M M M M M M M M M M N N S C S ci E N M 0 d' N 'd: M V M M M Lq CM UI L664MM.t O V 0O N N V M � O0 M M.- . TIT M y f V' V' V' V' V' M M M Q 0 0 0 0 ° o ° 0 0 00 0 0 0 o l m" ll O o 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 W coo 0 0 0 0 0 0 0 0 0 0 0 0 0 000 0 0 0 0 0 N N N N N N N N N N N N N N N N N V' a V' � � h� p �0�e -O� O � NN m N (OMN •-O i-M N a `� th of m N 6 n 6 6i 6 to to W r 6 0 0 r CO m O Y m m a a m C� V N(O OOJ V' V 7(O h V (O (DMNN` - (O V' co m r° cd m Q N N U)N V'MN�r r o (D .-N W M 70 rn O?Mm (o -7 . cm ui o;r �r 0� c' uim 6oit�� } c_ 7 O O rn u� rn m m o rn o M rn S N D rn V' V' N .- h r M r h D7 O Lq (D (O W OJ M (O N rn V phj m h Mr D a n n p � O) m 6 r r r r m r o m m m 2� � ' rn rn rn rn rn rn rn m rn rn rn rn rn rn rn rn rn rn rn rn CL a_ E O O O O O O O O M rn rn rn p� N (O � O rn r N rn O rn (O � o 0 0 0 0 0 0 o rn rn rn rn rn rn m rn rn rn rn rn w m co ro S O x Cr V' r V'N V'cONMO>� Mrnrn N(O a) (O rn O) O M O O O O O O M m M m M M M M m M m m C' M M M M w S C ah O V r V' MMMMO'i O)r V' rnNM V M7C � O M M (:000000 M M M M M M M M M M M M V' M V' M V' M M M M M M M N 0 L �j rn u'J V'N NM(OrnOON V'Nr V'"t M(OrNM S Q E M LO rn rn 7 N O M Q a O O O O M m M m M M M M m M M It It M M N 3 0 0 0 0 0 0 0 0 0 0 X 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 �O� N("> V'iO (O r of rn O � NM V'tO (O rro rn O NC') 0 0 0 0 0 0 0 0 0 0 0 0W O a o 0 0 0 0 0 0 0 0 0 0 0 N N N N N N N N N N N N Q (O (O (O (O c0 (O CD (O I O c0 t0 (O (D (O (O (D (O (D (O (O 6 ------ a N ��aiN��m��ai of oi� �rorormn��� oi�oi aim�ai�oin ui co of ai�oi of r .� Y N N a ro �co rai Cl? N ran V MMMMNr vui tO ° ��6r�co NN e- N[O co MME �co ni rNN rorovic V r cd M V 0 1 �O m7 �ro °��6 c6 ui �orroi Q m M N r m m m m c m M L m M m ro m o r m v o m rn a o M r . �t� voi °J Oi °oi� uirro , zmui of ui uiM r�nrai co c6 co poi of poi of uiv �<6v c6r� m n « mom c m m m m m M rn m M m m M M M° n M M1 r M1 N (O V (D l0 (O N N O M N C V V V t0 M M M O M O M O M O M O M O M co M m UJ m m N m in m in m n N n N O N m N 0 IMP N m m W W O` N Cl! N V N N m 0 c'i V fO N m O N N N N lV N N fV lV N N N N M M M M M N j�fl V Md'N NNNNN N V V nN m RHO Y1 r rn � - O mM C C V N W m N .mm O O O O O O O O O O O O m m m m rn m m m IV (V lV N " N m M M C) Cl V KI h h N m m N m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m rn m m m m m m m m m m m a Il a m ro m = m rn m rn rn rn rn rn m m m rn rn m rn rn rn m m rn m rn m m m rn rn m w rn m m m c rn rn rn m rn rn m m m m m 0 O x m m O N O N p N O N O O N O W IN N Oi m m O O N - M fV N N N N N N N N �p m r rn ---- -- N -- �- N N N N NN N N NN N N N N N N NNNN N N S C am' -mMM W CO M VVmNU�r m J N N M N pp m�c- .- ° r <oN OJ M r Nmul m vv,r m O)OOOOOi �-NN rN� - Oi 3` -� OiQ7 Oi Oi �Qi Oi D7 OimO�NNOiON NN � -- - - N t 0 M M N M r' M C'? N M N V M rn N N m N E F�NM�NM N 6 6 6 6 6 I.n 6 Mt[INN 6 6 m 6 O N rrn.- 4> O) O N ON V O N �� NNN rnNaN N I"d MNMNN� V' M r s of n of M of Cl ! o 11 o N t[)MNNMN tV (V (V lV fV "6 ----------- N N N N N NNN �- V V V '- N N N NNNN N N O ��n ov�oMO�n o�n o�n o�n �nomo�n O�n oinOmou�o�n o�n o�nO U�o�n vo.� M •i' O �- M V O M V O M V O M V O -, o V if1 in in «l ro io i6 mrr IM ^ � CO ro N Oi Oi � m 0 0 0 0 � r f 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 W O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O V V N V N V' N V N V N N N N N N N N N N V N V N V N V N V N V N V N V N V N V N V N V N V N N N N N N N N N N N N N N N N N a r N c - N a � � - -- �� a � � � (� c N N . - - r N M m W r W W 0 N V V V W M W m M N N V M W O r M W h V r V m m W m r M W W W V r N W W m h W N m V N M M m N W W W m V r r M V W W m N V W N r W W N W r W N V W W W r o r M W m V N m 6 6 r ro r r r r ro r m 6i M V V M V N M M V N M N N N V N M O N O O N N N N N O N M N M m m m W M M M M M M M M M M M M M M M M M M M M M M M mm M M M M M M M M M M M N M M M M M M M N N N N M r r r r N N N N N N N V V V V V V V V M M M N N N N V V V V V V V V M W W M W M W M W M W M M M M M M M M M P M W M W M W W W O M N M O M N V V W O W V M V M V M V M V M V M V M 6 M V W V M V W C W V W V W V W V N V V V V ro W W r r W W W W W N r W W N N W W W W 7 M M V W h - V V W N W W O h W T N O 7 M W m 0 0 0 N � m m� m 0 m 0 m m � r rn r m r m n m � rn m m ro m W m W m W m ro rn ro m ro rn ro rn ro rn ro m ro m m m ro rn rn m rn m m m m o o 0 0 0 0 rn rn rn rn m rn m m m rn rn m m m m m m rn rn rn w� ro m m m ° m ro ro ro ro w rn w w m ro rn ro m ro ro m m m m ro ro w ro ro ro ro m m m m m m w w ro m ro m rn m m N V M W m V W W V W W r m v r « o V N m W 7 ro v m v m M N N V N M M W N r V N N N N N N N N N N N N N N N N N N N NNNNNNNNNN N W V m m M T m N m h- m O V m M r n V m W V V V M W M W V N 7 W W W r M M V W m W r N m m V m � N � N N N N N r W W h V V N W r W V m N N W W r m r M N W m W N W M V N M N N r m W m h 7 N V M W 7 m V mu? 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O N Q m m r m O N N m N C' N 6,6 N N W N Oi N O M m N M Q M m M m M M uj M r M pj M pj M rn M m M m M m M m M m M Q Q Q Q Q N M M N N M m M O i (I m h h c0 m 0 m N Q t o M ���� N Q m (D m m m m m m r m r N N N O O O O 0 p O O O O O O O O O O m m @ qm m m m m m m m m ..... m m m m m m m rn rn m m m m m m rn m m a a �mrr(o v��n (oMmmmQN o0o N Q u)cormmm °°o mrrmr M mmMm m m m m m m m m m m m m m m m m m rn m m m m m m m m m oO o °mmmmmmm m m rn m m rn m m rn rn m m m rn m m m m = � � O x @ r m m (0 m N - (p h ' O m O ll� O N N N N N� N N� N N N N N m N N N N N N N N N N N N N N m N m W N N N N M N M N C ONOOI OI OJ N N N N N N rmr N N N r N h N Nmrrr NNNNNNNN rr NNN N NN NN N N N N N I N N NOJ N N N NN M1Nmrr N N N N N N N N m N V m m N 7- M m N m m m m V' N m m m m m N N N N N N N N N N N N N N N N N N N N N ry 0 m m h r m O m m 0 0 0 N m m m O O m m m m m ry 0 S p y cl E @ F-' Q V N V (O (O N m Q N r m m (D N N M m � h (p Q m r m c0 �[I m m m �- �- Q m m m (D m r m� N Q (D (A O (➢ O N (V N N N O O O m m m m m O m m O rn m m m m N r r r r r m m m m m m m m m m m m m m m M m M N N N N N N N N N N N N NNNNNNN N N 3 06 W O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O F- Q N O N O N O_ N O N O_ N N 0 0 N 0 N 0 N 0 N 0 N 0 N 0 N 0 N O_ N O N O N O N O N O N O N O N O N O N O N O N O N O N O NNNNNNN O O O O O O O NNNNNNNN O N N N N M o M rn M m N M Q m m M m r M N rn Q Q N rn W h M r rn M r N m N M N M M M rn ro M m rn M N r M M N N m M rn M r M Q M N rn V m rn M N M Q Q M Q M M M M M Q Q rn M Q M rn h M Q M r M M M M N M �7 rn rn r ti M . 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