(News Release) The Results of Radioactive Material Monitoring of the Surface Water Bodies within Ibaraki Prefecture (February-March Samples)

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1 (News Relese) The Results of Rdioctive Mteril Monitoring of the Surfce Wter Bodies within Ibrki Prefecture (Februry-Mrch Smples) Fridy, April 19, 2013 Wter Environment Division, Environment Mngement Bureu, Ministry of the Environment Direct line: Switchbord: Director: Msnobu Miyzki (ext. 6610) Deputy Director: Sori Ngsw (ext. 6614) Coordintor: Ktsuhiko Sto (ext. 6628) In ccordnce with the Comprehensive Rdition Monitoring Pln determined by the Monitoring Coordintion Meeting, the Ministry of the Environment (MOE) is continuing to monitor rdioctive mterils in wter environments (surfce wter bodies (rivers, lkes nd hedwters, nd costs), etc.). Smples tken from the surfce wter bodies of Ibrki Prefecture during the period of Februry 7-Mrch 8, 2013 hve been mesured s prt of MOE s efforts to monitor rdioctive mterils; the results hve recently been compiled nd re relesed here. The monitoring results of rdioctive mterils in surfce wter bodies crried out to dte cn be found t the following web pge: 1. Survey Overview (1) Survey Loctions 64 environmentl reference points, etc. in the surfce wter bodies within Ibrki Prefecture (s: 47 loctions, Lkes nd hedwters: 12 loctions, Costs: 5 loctions) (2) Survey Method Mesurement of concentrtions of rdioctive mterils (rdioctive cesium (Cs-134 nd Cs-137), etc.) in wter nd sediment Mesurement of concentrtions of rdioctive mterils nd sptil dose-rte in soil in the surrounding environment of wter nd sediment smple collection points (river terrces, etc.) 2. Outline of Results (* denotes the results of the previous survey (October-December 2012)) (1) Wter Qulity (Lower detection limit: 1Bq/L) Cs-134+ Cs-137: Not detectble (ND) t ny loction (* ND t ny loction) <Reference> Specifiction nd Stndrds for Food, Food Additives, etc. in ccordnce with the Food Snittion Act (Drinking Wter) (Ministry of Helth, Lbour nd Welfre Public Notice No.130, Mrch 15, 2012) (totl for Cs-134+Cs-137): 10Bq/kg Trget vlue for rdioctive mterils in tp wter (mngement trget for wter supply fcilities) (Mrch 5, 2012; 0305 Notice No.1 from the Director of the Wter Supply Division, Helth Service Bureu, Ministry of Helth, Lbour nd Welfre) (totl for Cs-134+Cs-137): 10Bq/kg

2 (2) Sediment (Lower detection limit: 10Bq/kg (dried mud)) Overll, the levels of both the rivers nd lkes/hedwters mesured were round 1,000Bq/kg or below for most of the loctions (costs: 100Bq/kg or below), nd hve generlly remined constnt or hd declining tendency. (s) Cs-134+Cs-137: 13-3,500Bq/kg (dried mud) (*ND-4,100Bq/kg (dried mud)) (Lkes nd hedwters) Cs-134+Cs-137: 93-1,300Bq/kg (dried mud) (*93-1,210Bq/kg (dried mud)) (Costs) Cs-134+Cs-137: ND-49Bq/kg (dried mud) (*ND-52Bq/kg (dried mud)) <Reference> Number of loctions by rdioctive cesium concentrtion (500Bq/kg) Numbers in ( ) denote results mesured on the previous occsion. 500 or 501 1,001 1,501 2,001 2,501 3,001 or Totl below -1,000-1,500-2,000-2,500-3,000 more s 33 (38) 8 (10) 2 (0) 0 (2) 2 (1) 0 (1) 1 (1) 46 (53) Lkes nd hedwters 8 (9) 3 (2) 1 (1) 0 (0) 0 (0) 0 (0) 0 (0) 12 (12) Costs 5 (15) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 5 (15) (3) Surrounding Environment (Lower detection limit: 10Bq/kg (dry)) (s) Cs-134+Cs-137: 56-3,100Bq/kg (dry) (*17-3,500Bq/kg (dry)) Sptil dose: μSv/h (Lkes nd hedwters) Cs-134+Cs-137: Bq/kg (dry) (*46-4,400Bq/kg (dry)) Sptil dose: μSv/h (Annex for detils) (Mp ttched) Future Plns MOE intends to continue to mesure rdioctive mterils in wter, sediment, etc. in rivers, lkes, etc. in FY2013, since concentrtions of rdioctive mterils seem to show fluctutions, depending on loctions, due to minor differences in smpling points or properties of smples of ech survey.

3 : Wter Qulity Monitoring Results (Annex) Generl items Concentrtion of rdioctive mteril Bq/L Full depth Smpling dte Wether No. Wter body Point Municiplity m Smpling depth Trnsprency Electricl conductivity SS Turbidity Rdioctive iodine m cm ms/m mg/l I-131 Cs-134 Cs Ymgoybshi Bridge 2013/3/7 Sunny > <1 2 <1 <1 <1 Stonegw 2 Murymbshi Bridge 2013/2/7 Cloudy > <1 1 <1 <1 <1 Kitibrkishi 3 Kurbeishi 2013/2/7 Sunny > <1 <1 <1 Hnzonogw 4 Tg System Isonrebshi Bridge 2013/2/8 Sunny <1 <1 <1 5 Okitgw Skebshi Bridge Tkhgishi 2013/2/7 Cloudy >100 8 <1 0 <1 <1 <1 6 Skibshi Bridge Kitibrkishi 2013/2/8 Sunny > <1 1 <1 <1 <1 7 Hnnukigw Shinhnnukibshi Bridge Tkhgishi 2013/2/8 Sunny > <1 <1 <1 8 Kujigw Ymgt Hitchiomiyshi 2013/2/7 Cloudy > <1 <1 <1 Kujigw 9 System Skkibshi Bridge Hitchishi /Tokimur Villge 2013/2/8 Sunny <1 <1 <1 10 Noguchi Hitchiomiyshi /Shirostomchi 2013/2/7 Sunny > <1 <1 <1 11 Nkgw Nkgw Nkgw Shimokunii Mitoshi 2013/2/7 Sunny > <1 <1 <1 12 Ktsutbshi Bridge Mitoshi /Hitchinkshi 2013/2/7 Sunny > <1 1 <1 <1 <1 13 System Nkmrugw Yngiswbshi Bridge Hitchinkshi 2013/2/7 Sunny <1 <1 <1 14 Hinumgw Hinumgw Hinumbshi Bridge Mitoshi /Orimchi 2013/2/7 Cloudy > <1 <1 <1 15 Hokotgw Ashibshi Bridge 2013/2/8 Cloudy > <1 <1 <1 16 Tomoegw Shintomoegwbshi Bridge Hokotshi 2013/2/8 Cloudy <1 <1 <1 17 Tiyogw Tzukbshi Bridge 2013/2/8 Cloudy > <1 <1 <1 18 T Tkedgw Uchijukuohshi Bridge 2013/2/8 Sunny > <1 1 <1 <1 <1 Kitur Lke 19 o Ymdgw Nioroshibshi Bridge 2013/2/14 Cloudy <1 <1 <1 Nmegtshi 20 n Kurkw Kurkwbshi Bridge 2013/2/14 Cloudy <1 <1 <1 21 e Gntsugw JA Yokohshi 2013/2/14 Cloudy <1 <1 <1 22 g Ngregw Suhoibshi Bridge Kshimshi 2013/2/15 Rin > <1 <1 <1 23 Sonobegw Sonobeshinbshi Bridge Omitmshi 2013/2/13 Sunny <1 <1 <1 24 w Snnogw Tokorobshi Bridge Ishiokshi /Omitmshi 2013/2/13 Sunny <1 <1 <1 25 Koisegw Heiwbshi Bridge Ishiokshi 2013/2/13 Sunny <1 <1 <1 26 Kjinshigw Kmishukubshi Bridge Nmegtshi 2013/2/13 Sunny <1 <1 <1 27 Hishikigw Hishikibshi Bridge 2013/2/13 Sunny <1 <1 <1 Ksumigurshi 28 Ichinosegw Kwnkbshi Bridge 2013/2/13 Sunny <1 <1 <1 29 Skigw Skibshi Bridge/Ntionl Route /2/12 Cloudy <1 <1 <1 Ksumigur Lke Tsuchiurshi 30 R Shinkw Shintenbshi Bridge 2013/2/12 Cloudy <1 <1 <1 31 i Skurgw Eiribshi Bridge Tsuchiurshi /Tsukubshi 2013/2/13 Sunny <1 <1 <1 32 v Bizengw Bizengwbshi Bridge 2013/2/12 Cloudy <1 <1 <1 Tsuchiurshi 33 e Hnmurogw Shinwbshi Bridge 2013/2/12 Cloudy <1 <1 <1 34 r Seimeigw Ktsuhshi Bridge Amimchi 2013/2/12 Cloudy <1 <1 <1 35 Onogw Okuhrohshi Bridge Ryugskishi /Inshikishi 2013/2/12 Cloudy <1 <1 <1 36 Shintonegw Shintonebshi Bridge Inshikishi 2013/2/14 Cloudy <1 <1 <1 37 Hitchitonegw Yorokoshigw Horinouchibshi Bridge Itkoshi 2013/2/14 Cloudy <1 <1 <1 38 Mekw Aymebshi Bridge Itkoshi 2013/2/15 Cloudy <1 <1 <1 39 S Kwshimbshi Bridge Chikuseishi 2013/2/12 Cloudy > <1 <1 <1 Kinugw Kinugw 40 y Tkishitbshi Bridge Moriyshi 2013/2/13 Sunny <1 <1 <1 41 s Tgw Tgwbshi Bridge Chikuseishi 2013/2/12 Cloudy <1 <1 <1 42 t Kurokobshi Bridge Chikuseishi 2013/2/12 Cloudy <1 <1 <1 Kokigw 43 e Kokigw Fumimkibshi Bridge Ryugskishi /Torideshi 2013/2/13 Sunny <1 <1 <1 44 m Inrigw Ogukibshi Bridge Tsukubshi 2013/2/13 Sunny <1 <1 <1 45 Kurihshi Bridge Kogshi 2013/2/13 Sunny <1 <1 <1 Tonegw 46 Tonegw Fukw Tonemchi 2013/2/13 Sunny Unble to collect smples due to construction 47 Swr Inshikishi 2013/2/15 Rin <1 <1 <1 s for rivers re listed from north to south, nd for different points long the river, from upstrem to downstrem.

4 : Sediment Monitoring Results Generl items Concentrtion of rdioctive mteril Bq/kg (dried mud) Full depth Smpling dte Wether Mud smpling depth Mud content Rdioctive iodine No. Wter body Point Municiplity m Property cm % I-131 Cs-134 Cs-137 Totl 1 Stonegw Ymgoybshi Bridge 2013/3/7 Sunny Grvel < Murymbshi Bridge Kitibrkishi 2013/2/7 Cloudy Snd < Kurbeishi 2013/2/7 Sunny Snd < Hnzonogw 4 Tg System Isonrebshi Bridge 2013/2/8 Sunny Snd < Skebshi Bridge Tkhgishi 2013/2/7 Cloudy Snd <30 < Okitgw 6 Skibshi Bridge Kitibrkishi 2013/2/8 Sunny Snd < Hnnukigw Shinhnnukibshi Bridge Tkhgishi 2013/2/8 Sunny Snd < Kujigw System Kujigw Ymgt Hitchiomiyshi 2013/2/7 Cloudy Snd < Skkibshi Bridge Hitchishi /Tokimur Villge 2013/2/8 Sunny Snd < Noguchi Hitchiomiyshi /Shirostomchi 2013/2/7 Sunny Snd <30 < Nkgw Nkgw Nkgw Shimokunii Mitoshi 2013/2/7 Sunny Snd < Ktsutbshi Bridge Mitoshi /Hitchinkshi 2013/2/7 Sunny Silt < System Nkmrugw Yngiswbshi Bridge Hitchinkshi 2013/2/7 Sunny Silt < Hinumgw Hinumgw Hinumbshi Bridge Mitoshi /Orimchi 2013/2/7 Cloudy Grvel/silt < Hokotgw Ashibshi Bridge 2013/2/8 Cloudy Silt < Tomoegw Shintomoegwbshi Bridge Hokotshi 2013/2/8 Cloudy Snd < Tiyogw Tzukbshi Bridge 2013/2/8 Cloudy Snd < T Tkedgw Uchijukuohshi Bridge 2013/2/8 Sunny Snd < o Kitur Lke Ymdgw Nioroshibshi Bridge 2013/2/14 Cloudy Snd/silt < Nmegtshi n 20 Kurkw Kurkwbshi Bridge 2013/2/14 Cloudy Grvel/snd < e Gntsugw JA Yokohshi 2013/2/14 Cloudy Snd < g Ngregw Suhoibshi Bridge Kshimshi 2013/2/15 Rin Snd < w K Sonobegw Sonobeshinbshi Bridge Omitmshi 2013/2/13 Sunny Silt < s Snnogw Tokorobshi Bridge Ishiokshi /Omitmshi 2013/2/13 Sunny Snd/silt < , u Koisegw Heiwbshi Bridge Ishiokshi 2013/2/13 Sunny Snd/silt < m Kjinshigw Kmishukubshi Bridge Nmegtshi 2013/2/13 Sunny Snd < i 27 g Hishikigw Hishikibshi Bridge Ksumigurshi 2013/2/13 Sunny Snd < Ichinosegw Kwnkbshi Bridge 2013/2/13 Sunny Silt < R u Skigw Skibshi Bridge/Ntionl Route /2/12 Cloudy Grvel/snd < Tsuchiurshi 30 i r Shinkw Shintenbshi Bridge 2013/2/12 Cloudy Silt < ,500 2, v Skurgw Eiribshi Bridge Tsuchiurshi /Tsukubshi 2013/2/13 Sunny Silt < Bizengw Bizengwbshi Bridge 2013/2/12 Cloudy Snd/silt < ,400 2,150 e Tsuchiurshi 33 L Hnmurogw Shinwbshi Bridge 2013/2/12 Cloudy Grvel/snd < r Seimeigw Ktsuhshi Bridge Amimchi 2013/2/12 Cloudy Snd/silt <30 1,200 2,300 3,500 k 35 Onogw Okuhrohshi Bridge Ryugskishi /Inshikishi 2013/2/12 Cloudy Snd < e Shintonegw Shintonebshi Bridge Inshikishi 2013/2/14 Cloudy Snd/silt < Hitchitonegw Yorokoshigw Horinouchibshi Bridge Itkoshi 2013/2/14 Cloudy Grvel/snd < Mekw Aymebshi Bridge Itkoshi 2013/2/15 Cloudy Silt < S Kinugw Kwshimbshi Bridge Chikuseishi 2013/2/12 Cloudy Snd <30 < Kinugw 40 y Tkishitbshi Bridge Moriyshi 2013/2/13 Sunny Snd/silt < s Tgw Tgwbshi Bridge Chikuseishi 2013/2/12 Cloudy Snd/grvel < t Kurokobshi Bridge Chikuseishi 2013/2/12 Cloudy Snd/silt < Kokigw 43 Kokigw Fumimkibshi Bridge Ryugskishi /Torideshi 2013/2/13 Sunny Snd < e 44 Inrigw Ogukibshi Bridge Tsukubshi 2013/2/13 Sunny Grvel/snd < ,250 m 45 Kurihshi Bridge Kogshi 2013/2/13 Sunny Snd <30 < Tonegw Tonegw Fukw Tonemchi 2013/2/13 Sunny Unble to collect smples due to construction 47 Swr Inshikishi 2013/2/15 Rin Snd/silt < s for rivers re listed from north to south, nd for different points long the river, from upstrem to downstrem.

5 : Surrounding Environment Monitoring Results Left bnk Right bnk Smpling dte Wether Concentrtion of rdioctive mteril Bq/kg (dry) Concentrtion of rdioctive mteril Bq/kg (dry) Air dose Air dose Property Rdioctive iodine Property Rdioctive iodine No. Wter body Point Municiplity μsv/h μsv/h I-131 Cs-134 Cs-137 Totl I-131 Cs-134 Cs-137 Totl 1 Stonegw Ymgoybshi Bridge 2013/3/7 Sunny Lomy/skeletl <30 1,100 2,000 3, Lomy < ,200 1, Murymbshi Bridge Kitibrkishi 2013/2/7 Cloudy Lomy < ,300 2, Lomy <30 1,000 1,900 2, Kurbeishi 2013/2/7 Sunny Unble to collect smples due to snow on the ground Tg System Hnzonogw 4 Isonrebshi Bridge 2013/2/8 Sunny Lomy < Lomy < , Okitgw Skebshi Bridge Tkhgishi 2013/2/7 Cloudy Lomy/sndy < Unble to collect smples due to snow on the ground 6 Skibshi Bridge Kitibrkishi 2013/2/8 Sunny Lomy < , Lomy < Hnnukigw Shinhnnukibshi Bridge Tkhgishi 2013/2/8 Sunny Lomy < Lomy < Kujigw Kujigw Ymgt Hitchiomiyshi 2013/2/7 Cloudy Lomy < Sndy/skeletl < System Skkibshi Bridge Hitchishi /Tokimur Villge 2013/2/8 Sunny Lomy/sndy < Lomy < Nkgw Noguchi Hitchiomiyshi /Shirostomchi 2013/2/7 Sunny Lomy < Lomy/clyish < Nkgw Nkgw Shimokunii Mitoshi 2013/2/7 Sunny Lomy < Lomy/clyish < Ktsutbshi Bridge Mitoshi /Hitchinkshi 2013/2/7 Sunny Lomy < Lomy/skeletl < System Nkmrugw Yngiswbshi Bridge Hitchinkshi 2013/2/7 Sunny Lomy < Lomy < Hinumgw Hinumgw Hinumbshi Bridge Mitoshi /Orimchi 2013/2/7 Cloudy Lomy < ,100 1, Lomy/skeletl < , Hokotgw Ashibshi Bridge 2013/2/8 Cloudy Soil not exposed 16 Tomoegw Shintomoegwbshi Bridge Hokotshi 2013/2/8 Cloudy Lomy < Lomy < , Tiyogw Tzukbshi Bridge 2013/2/8 Cloudy Lomy < Lomy/skeletl < T 18 Tkedgw Uchijukuohshi Bridge 2013/2/8 Sunny Lomy < Lomy < ,100 1, o Kitur Lke Ymdgw Nioroshibshi Bridge Nmegtshi 2013/2/14 Cloudy Lomy/skeletl < Lomy/skeletl < , n Kurkw Kurkwbshi Bridge 2013/2/14 Cloudy Lomy/skeletl < Lomy/skeletl < e Gntsugw JA Yokohshi 2013/2/14 Cloudy Lomy/skeletl < Lomy/skeletl < g Ngregw Suhoibshi Bridge Kshimshi 2013/2/15 Rin Soil not exposed 23 K Sonobegw Sonobeshinbshi Bridge Omitmshi 2013/2/13 Sunny Lomy < Lomy < , Snnogw Tokorobshi Bridge Ishiokshi /Omitmshi 2013/2/13 Sunny Lomy < Lomy < ,400 2, w s Koisegw Heiwbshi Bridge Ishiokshi 2013/2/13 Sunny Lomy < , Lomy < u 26 Kjinshigw Kmishukubshi Bridge Nmegtshi 2013/2/13 Sunny Lomy < Lomy/sndy < m i 27 Hishikigw Hishikibshi Bridge 2013/2/13 Sunny Lomy < Lomy < , g Ksumigurshi 28 Ichinosegw Kwnkbshi Bridge 2013/2/13 Sunny Lomy < Lomy < u R Skigw Skibshi Bridge/Ntionl Route 354 Tsuchiurshi 2013/2/12 Cloudy Lomy/skeletl < ,100 1, Lomy < , r Shinkw Shintenbshi Bridge 2013/2/12 Cloudy Lomy < , Lomy < i 31 Skurgw Eiribshi Bridge Tsuchiurshi /Tsukubshi 2013/2/13 Sunny Lomy < Lomy < v Bizengw Bizengwbshi Bridge 2013/2/12 Cloudy Lomy/skeletl < Lomy/skeletl < L Tsuchiurshi 33 e Hnmurogw Shinwbshi Bridge 2013/2/12 Cloudy Lomy/skeletl < , Lomy < r Seimeigw Ktsuhshi Bridge Amimchi 2013/2/12 Cloudy Lomy/sndy < , Lomy/sndy < ,300 2, k 35 Onogw Okuhrohshi Bridge Ryugskishi /Inshikishi 2013/2/12 Cloudy Lomy < , Lomy < , e 36 Shintonegw Shintonebshi Bridge Inshikishi 2013/2/14 Cloudy Sndy < , Lomy/skeletl < Hitchitonegw Yorokoshigw Horinouchibshi Bridge Itkoshi 2013/2/14 Cloudy Lomy < Lomy < Mekw Aymebshi Bridge Itkoshi 2013/2/15 Cloudy Lomy < Sndy < S Kinugw Kinugw Kwshimbshi Bridge Chikuseishi 2013/2/12 Cloudy Lomy < Lomy < y Tkishitbshi Bridge Moriyshi 2013/2/13 Sunny Lomy < Lomy < s Tgw Tgwbshi Bridge Chikuseishi 2013/2/12 Cloudy Lomy < Lomy/skeletl < Kurokobshi Bridge Chikuseishi 2013/2/12 Cloudy Lomy < Lomy < t Kokigw 43 Kokigw Fumimkibshi Bridge Ryugskishi /Torideshi 2013/2/13 Sunny Lomy < , Lomy < e Inrigw Ogukibshi Bridge Tsukubshi 2013/2/13 Sunny Lomy/skeletl < Lomy/skeletl < m Kurihshi Bridge Kogshi 2013/2/13 Sunny Unble to collect smples due to snow on the ground 46 Tonegw Tonegw Fukw Tonemchi 2013/2/13 Sunny Lomy < Unble to collect smples due to construction 47 Swr Inshikishi 2013/2/15 Rin Lomy < Lomy/skeletl < , Smples for surrounding environment (soil) were generlly collected from 5 points in 3m squre in the river terrce, etc., nd mixed. Depending on the site sitution, fctors, such s the re of smpling my be much smller, my cuse figures to vry significntly. s for rivers re listed from north to south, nd for different points long the river, from upstrem to downstrem. Air dose ws mesured with survey meter, TCS-171 or TCS-172 of Hitchi-Alok Medicl, Ltd.

6 Lke nd Hedwter: Wter Qulity Monitoring Results No. Point Smpling dte Wether Full depth m Generl items Concentrtion of rdioctive mteril Bq/L Smpling depth Secchi disk depth Electricl conductivity SS Turbidity Rdioctive iodine m m ms/m mg/l I-131 Cs-134 Cs Hirour Surfce lyer 2013/2/20 Sunny <1 <1 <1 Lower lyer 1.7 1, <1 <1 <1 2 Hinum Lke Miyme Surfce lyer 0.5 1, <1 <1 <1 2013/2/20 Sunny Lower lyer 2.2 1, <1 <1 <1 3 Oyzw Surfce lyer 0.5 1, <1 <1 <1 2013/2/20 Sunny Lower lyer 1.3 1, <1 <1 <1 4 Offshore of Tmtsukuri Surfce lyer <1 <1 <1 2013/2/20 Sunny Lower lyer <1 <1 <1 5 Offshore of Kkeum Surfce lyer <1 <1 <1 2013/2/20 Sunny Lower lyer <1 <1 <1 Ksumigur Lke 6 Center of the lke Surfce lyer <1 <1 <1 2013/2/20 Sunny Lower lyer <1 <1 <1 7 Offshore of Aso Surfce lyer <1 <1 <1 2013/2/20 Sunny Lower lyer <1 <1 <1 8 Offshore of Kmy Surfce lyer <1 <1 <1 2013/2/20 Sunny Lower lyer <1 <1 <1 Kitur Lke 9 Jingubshi Bridge Surfce lyer <1 <1 <1 2013/2/20 Sunny Lower lyer <1 <1 <1 10 Sotonskur Lke Surfce lyer <1 <1 <1 2013/2/20 Sunny Hitchitonegw Lower lyer <1 <1 <1 11 Ikisu Surfce lyer <1 <1 <1 2013/2/20 Sunny Lower lyer <1 <1 <1 12 Ushikunum Lke Center of Ushikunum Lk Surfce lyer 2013/2/ <1 <1 <1 Sunny 1.3 Lower lyer Collected only from the surfce lyer due to shllow wter Lke nd Hedwter: Sediment nd Surrounding Environment (Lke Shore) Monitoring Results Sediment Surrounding environment (lke shore) Soil Full depth Smpling dte Wether Generl items Concentrtion of rdioctive mteril Bq/kg (dried mud) m Concentrtion of rdioctive mteril Bq/kg (dry) Air dose Mud smpling depth Mud content Rdioctive iodine Property Rdioctive iodine No. Point Property μsv/h cm % I-131 Cs-134 Cs-137 Totl I-131 Cs-134 Cs-137 Totl 1 Hirour 2013/2/20 Sunny Silt/mud < Lomy/skeletl <30 < Hinum Lke Miyme 2013/2/20 Sunny Silt < Lomy/skeletl < Oyzw 2013/2/20 Sunny Silt < Offshore of Tmtsukuri 2013/2/20 Sunny Silt < Sndy < Offshore of Kkeum 2013/2/20 Sunny Snd < Sndy < Ksumigur Lke Center of the lke 2013/2/20 Sunny Cly < Offshore of Aso 2013/2/20 Sunny Snd < Sndy < Offshore of Kmy 2013/2/20 Sunny Silt < Sndy < Kitur Lke Jingubshi Bridge 2013/2/20 Sunny Snd < Lomy/sndy < Sotonskur Lke Hitchitonegw 2013/2/20 Sunny Snd < Lomy < Ikisu 2013/2/20 Sunny Snd < Lomy < Ushikunum Lke Center of Ushikunum Lke 2013/2/21 Sunny Silt/mud < ,300 Lomy < Smples for surrounding environment (lke shore) were generlly collected from 5 points in 3m squre on the lke shore, etc., nd mixed. Depending on the site sitution, fctors, such s the re of smpling my be much smller, my cuse figures to vry significntly. Air dose ws mesured with survey meter, TCS-171 or TCS-172 of Hitchi-Alok Medicl, Ltd. s re listed from north to south.

7 Cost: Wter Qulity Monitoring Results Generl items Concentrtion of rdioctive mteril Bq/L No Wter body Offshore of Stonegw Estury Offshore of Okitgw Estury Offshore of Momiygw /Kujigw Esturies Smpling dte Wether Full depth Smpling depth Secchi disk depth Slinity SS Turbidity Rdioctive iodine m m mg/l I-131 Cs-134 Cs-137 Surfce lyer <1 <1 <1 2013/2/25 Cloudy Lower lyer <1 <1 <1 Surfce lyer <1 <1 <1 2013/2/25 Cloudy Lower lyer <1 <1 <1 Surfce lyer <1 <1 <1 2013/2/25 Sunny Lower lyer <1 <1 <1 4 Neighboring wter body of Ken-o Offshore of Nkgw Surfce lyer <1 <1 <1 2013/2/25 Sunny Lower lyer <1 <1 <1 5 Offshore of Tonegw Estury Surfce lyer <1 <1 <1 2013/3/8 Sunny Lower lyer <1 <1 <1 Cost: Sediment Monitoring Results Generl items Concentrtion of rdioctive mteril Bq/kg (dried mud) No. Wter body Smpling dte Wether Full depth Mud smpling depth Mud content Property Rdioctive iodine cm % I-131 Cs-134 Cs-137 Totl 1 Offshore of Stonegw Estury 2013/2/25 Cloudy Snd <30 <10 <10-2 Offshore of Okitgw Estury 2013/2/25 Cloudy Snd < Offshore of Momiygw /Kujigw Esturies 2013/2/25 Sunny Silt < Neighboring wter body of Ken-o Offshore of Nkgw 2013/2/25 Sunny Snd <30 <10 <10-5 Offshore of Tonegw Estury 2013/3/8 Sunny Snd <30 <10 <10 - s re listed from north to south.

8 Nkgw Kitibrkishi Digomchi Kinugw Tkhgishi Hitchiomiyshi Hitchishi Hitchiotshi Gokmchi Kogshi Yukishi Skimchi Ychiyomchi Bndoshi Kokigw Jososhi Shimotsum shi Chikuseishi Skurgwshi Tsukubshi Tsukubmirishi Moriyshi Torideshi Ishiokshi Tsuchiurshi Tonemchi Amimchi Ksmshi Ushikushi Ryugskishi Kwchi mchi Shirostomchi Mihomur Villge Mitoshi Ibrki Prefecture Ibrkimchi Omitmshi Ksumigurshi Inshikishi Nkshi Nmegtshi Tonegw Kujigw Orimchi Hokotshi Itkoshi Tokimur Villge Hitchinkshi Kshimshi Kmisushi Legend Survey loctions s Lkes nd hedwters Se res