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Update on the SOCATRI incident : Results of environmental monitoring (8h55 am)

Press release

July 10, 2008

Results of environmental monitoring


 
 
Following the incident which occurred during the night of July 7-8, 2008 at its effluent treatment plant, SOCATRI (Tricastin) is pursuing its environmental monitoring in association with the local authorities and the Nuclear Safety Authority.
 
The table below gives the results of the samples taken at the additional representative monitoring points: surface water and domestic wells.



 
Results of samples taken as of July 8 and 9, 2008 - Update as at July 10, 2008 – 08.30 am

 SURFACE WATERJuly 8, 2008
6.30 am
July 8, 2008
9.30 am
July 8, 2008
1.30 pm
July 8, 2008
10 pm
July 9, 2008
6.30 am
July 9, 2008
2.00 pm
Comments
On-siteCanal upstream of the Gaffière
N°1
7.65 mg/L66.9 mg/L11.9 mg/L16.9 µg/L190 µg/L196 µg/LDifficult to obtain a representative sample given the low volume of water in this area.
On-siteGaffière
N°2
1.56 mg/L41.6 mg/L9.7 mg/L5.6 µg/L98.7 µg/L135 µg/LDifficult to obtain a representative sample given the low volume of water in this area.
Off-siteGaffière site exit 6.15 am
N°3
52,7 µg/L49 µg/L42,6 µg/L45.3 µg/L8.9 µg/L7.7 µg/LValue < 15 μg/L
Off-siteGaffière rod 6.24 am
N°4
57.9 µg/L37.4 µg/L39,5 µg/L55.3 µg/L9 µg/L8,7 µg/LValue < 15 μg/L
Off-siteGaffière roof of MW9
N°5
119 µg/L55.7 µg/L53 µg/L19.6 µg/L10.2 µg/L27.7 µg/LDecreasing steadily since July 8 – Stabilized at between 10 and 30 μg/L
Off-siteBridge over the Gaffière close to power line
6.40 am
N° 6
240 µg/L32 µg/L109 µg/L23.2 µg/L10.9 µg/L9.2 µg/LValue < 15 μg/L
Off-siteConfluence of the Gaffière/Mayre Girard
7.04 am
N° 7
747 µg/L 120 µg/L258 µg/L31.8 µg/L13.8 µg/L8.6 µg/LValue < 15 μg/L
Off-siteLauzon near road leading to Mas de Flore 7.11
am
N° 8
1.91 mg/L87.8 µg/L28.4 µg/L16,7 µg/L5.9 µg/L5.2 µg/LValue < 15 μg/L
Off-siteN7 after bridge
N°9
  72.4 µg/L25.9 µg/L12.3 µg/L6.2 µg/LValue < 15 μg/L
Off-site90° bend before houses
N°10
  702 µg/L90.8 µg/L17.3 µg/L5.3 µg/LValue < 15 μg/L
Off-siteSouth of airfiled
N°11
  2.3 µg/L57.8 µg/L20.6 µg/L11.1 µg/LValue < 15 μg/L
Off-siteBelow old PSE bridge
N°12
  2.4 µg/L63.4 µg/L21.6 µg/L11.4 µg/LValue < 15 μg/L
Off-siteMouth of Rhône on Lauzon side
N°13
  2.5 µg/L93.5 µg/L31.2 µg/L12 µg/LValue < 15 μg/L
Off-siteUpstream of the Rhône
N°14
  1.6 µg/L1.4 µg/L1.4 µg/L1.9 µg/LValue < 15 μg/L


For information:
The US-EPA (the US environmental protection agency) recommends values less than 30μg/L
For water intended for human consumption and drunk regularly, the WHO recommends concentrations of less than 15μg/L


WATER TABLEResults
July 8, 2008
6.30 am
Results
July 8, 2008
10 pm
Results
July 9,, 2008
11 am
ET 27 SOCATRI5.0 mg/l5.7 mg/l5.5 mg/l
ET 28 SOCATRI6.7 mg/l4.5 mg/l4.5 mg/l
ET 9 EURODIF2.4 mg/l2.6 mg/l2.6 mg/l
ET 10 EURODIF1.5 mg/l1.6 mg/l1.6 mg/l
These results are perfectly normal. The readings are comparable to those normally recorded by these piezometers.


LAKESJuly 8, 2008July 9, 2008
Lac  Les Girardes < 2 mg/l< 2 mg/l
 Lac Trop long3.75 mg/l3.47 mg/l
Lac Baltras (reading wrongly transcribed on the previous update)-3.21 mg/l
These results are perfectly normal.

DOMESTIC WELLS July 8, 2008 
July 9, 2008
5 pm
 
July 9, 2008
9 pm
 Point AEP2 Near Guérinés 2.0 µg/L 3.2 µg/L-
 Point AEP4 SERIGNAN household 2.4 µg/L 10.5 µg/L (*) 3.1 µg/L (*)
 Point AEP5 Chaix farm 2.0  µg/L 1.1 µg/L-
(*) A sample was taken here on July 9, 2008. The reading was abnormally high (64 μg/L), and it was decided to take a control sample at 5 pm, for which the reading was 10.5 μg/L.
A third sample was taken at 9 pm on July 9, 2008. The reading this time was
3.1 μg/L.

Press contact  :
Catherine Dalverny
06 89 09 64 51
Gilles Salgas
06 77 02 15 32