Tokiwa-onsen Boiler Room

About safety,sanitary management

@@@mechanic systems inside boiler room,or the Bandai (watch stand)


Rose Bath ( April 20th )

      We had a rose bath this month following a jasmine bath last month.
      We tried two kinds of rose herbs,petals and berz from the herb factory.
      
      Wrapping them in filter paper and cloth,we made three bags of petals and
      two bags of barz using five hundred grams from each herb.We then placed them
      into the bathtub.
      We expected the berz to have a stronger aroma,but actually the petals did when placed 
      in the bath water.The herb bags themselves did not smell so much,but the bathrooms
      were filled with a subtle,rose scent.
      Some costomers said it had a strong scent,but approximately one-third of our customers
      said they didn't smell it at all.We might have to improve it by adding
      some rose extraction for example.
      The petals turned yellow in  hot water and nearly brown when our sento was closed.
      That was more than we expected.The bags of cloth were dyed dark yellow.
      It is said that this produces a melancholy effect and it seemed to be true.
      Even though it might sound a bit exaggerated,the rose bath gave me the feeling
      I was listening to "Always With Dreams" by Yuko Hara.
      In summary,fragrance is the most important factor in an herb bath.
      Our responsibility is to think of good ideas that will appeal to our customer's 
      sense of sight,hearing and smell.


Trouble during this season...

       Around March of every year,teenagers claiming  to be elementary pupils try to
      enter our sento for130yen( This is the fee for elementary school children).
      Junior-high students should pay the adult fee of 360yen.
      "I remember you came here around this time last year..."
      "I saw all of you in junior-high uniforms riding  bicycles..."
      This is a little problem we have during this season.

Problems Regarding Legionella

      The legionella germ,which in the past has caused serious problems for sentos and 
      hot springs,can be  easily eliminated by normal chlorine disinfections(more than 0.2ppm 
      residualchlorine).Recent reports of legionella in some places seems to
      have been caused by the fact that sento owners didn't use enough chlorine
      to sterilize the water.
      The reasons for such mistakes include ignorance of the problem or fear that 
      adding chlorine might kill the medicinal effects  or color of the bath water.
      How then should one sterilize the sento water everyday?
      Before opening the sento,we filter the water and add chlorine,settinb the 
      concentration  from 0.2ppm to 0.4ppm.Sometimes we add more chlorine  
      to keep the same concentration because residual chlorine runs out in about five 
      hours( affected by various conditions such as the number of customers,
      jet bath or bubble bath,etc).


      After closing the sento,we add chlorine again to set the concentration of residual 
      chlorine to 0.4ppm.This completely sterilizes the filtration system. 
      The procedure takes thirty minutes nomally.
      Most sentos follow the same practice.
      Experimenting with a germ culture,we found the bath water to be germ free 
      as long as the concentration was kept over 0.2ppm.Care must be taken to keep 
      the concentration levels over 0.2ppm mark because lower levels are not  
      identifiable to the human eye.
      The above procedures describe sterilization for the normal water.Sterilization of 
      medicinal seasonal baths is under survey now.The results will be released by September 2002.

Another problem we had recently

      Recently someone place soa in the bath water.We found it on at least four occasions.
      There is reason to believe this was done deliberately.Other sento owners in the neighborhood 
      said they had the same problem.It may be the same culprit.Now we have a notice
      informing customers to use care and avoid placing soaps in the water.
      When this happens,the water turns muddy instead of bubbling.At first,when the filter 
      absorbed the soap we didn't understand why the water was muddy.This is a very malicious action. 
      Please refrain from such acts.