Dear All, I have been searching for a wide case study like this, for some time now. We had a case 2.5 years back, where a freezer was left without power, and then it “died” during our vacation. You can all imagine the smell after rotten meat, that was creeping out on the floor, in our basement. After getting rid of the freezer our insurance company should oversee getting rid of the smell. They did a short time ozone treatment, and when we returned back home from the vacation, then we couldn’t breath for the smell of dead.. The Insurance/cleaning company decided to re-house us for 12 days, and then they planned for a huge ozone operation inhouse. The used the ozone machine for some 43 hours in a row, we checked the kilowatt used, as this was the only consumer inhouse at that time. We were send back to de-airing of the house for 2 days, before moving back in, and this was done during office hours before the weekend. We came back home on the Sunday, after the 14 days, and the living room was filled up with 25 boxes of cleaned clothes, blankets etc. from an external company. We started to unpack all these boxes, but immediately we discovered a strange smell from all the boxes. After ½ hour my wife started to get blue fingertips, feeling cold, got a fewer, despite outside temp. of 22 degrees (August). Even the dog was looking strange and blinked constantly. I was getting same symptoms, as my wife after 1 hour We then called the cleaning company to get rid of all 25 boxes, and was of the believe that then everything was ok again. It later turned out that the smelling from the clothes was an extreme de-gassing, after the ozone treatment, that couldn’t even be stopped by a professional cleaning. We then stayed in the house for a few more days, but my wife, who is not working, was getting strange symptoms, and after consulting with our doctor, we again left the house. I only had headache, but again, I was at work the most of the time. We then demanded our insurance company to perform a throughout investigation by the Danish Technological Institute, Construction and Plant. I have attached the report outcome below, for you all to see the real impact, when overdoing ozone treatments. It turns out, that ozone are attacking all organic materials and these are then starting to de-gas. It’s however very hard to find de-gassing examples, as to see how long time it’s being active. Also furniture will hold back these gasses to a certain extent, and this also goes for the ozone, I guess.. Please see link for material overview, for damages by Ozone, on page 12 in the PDF. Interesting reading.. https://ozonesolutions.com/content/DefinitiveGuide.pdf We ended up in getting all in-house belongings covered by the insurance company, and the house was bought by the insurance company too, as we couldn’t move back into the house either. All building material are also being attacked, Paint, sealings, rubber, wooden materials Etc. We know they ended up renting a huge carbon filter machine (In Sweden) for 8 weeks and then we learned that they again sold our house to a family near by. Now 2.5 years after my wife has got issues with her lungs, and following has been diagnosed: Air trapping, bronchiectasis, bronchial wall thickening, scar tissues, pleurisy and with a proven 25% decreased lung capacity. We are now looking into a strange thing called “causation” and as there has been no similar cases ever in Denmark for this, then I’m looking abroad for associates, as to find cases that have been handled by local courts Etc. below was all the different type of gasses/positionings found in our house, 10 days after we moved out of the house again. You will see that a lot of the gasses are normally newer found in living areas, so can only imagine what they can do in in conjunction The identified components are listed in the table below as concentrations in µg/m³ in the attached pictures!!! I hope someone can support for getting on here... From a deperate couple from Denmark Lene and Jens

We bought a 50's house last year that had the same problem. The previous owner painted the entire house and basement. He carpeted the second floor, the stairs as well as steps into the basement. There was a chemically smell that caused the back of my DH's throat and eyes to burn and gave him headaches. We tore out the carpet and left the windows open all last summer to air it out. It finally went away. Have you checked for sewer problems? We had a new sump pump installed and our basement waterproofed. That smelled for awhile until it finished airing out. Here are a few links that might be helpful: Mysterious odor! Can a new roof installation make your house stink ths.gardenweb.com/forums/load/disaster/msg0421443316706.html?5 Building Odor Guide: How to Find, Test, & Remove Odors, Odor Detection and Methods to Remove Smells, & Gases in Buildings inspectapedia.com/sickhouse/Odor-Diagnosis-Cure.htm An architect with Multiple Chemical Sensitivity writes about healthy houses www.thecanaryreport.org/2009/02/03/prescriptions-for-a-healthy-house/ What Are the Dangers of Breathing Sewer Gas? /www.ehow.com/list_6371930_dangers-breathing-sewer-gas_.html The Invisible Epidemic Causing Headaches, Fatigue and Depression articles.mercola.com/sites/articles/archive/2011/12/26/how-to-purify-the-air-in-your-home.aspx?e_cid=20111226_DNL_art_1

I have about 20 large, commercial ozone generators which I use in a number of different restoration situations and this isnÂt one of them. Yes I have tried ozone on cat urine and it doesnÂt work. The ozone will clean the surface air and make everything smell nice for a week or two but that nasty cat smell is coming back. Cat urine is super strong and in its dry state its non-soluble salt crystals. These crystals set into most hard surfaces including tile so you can imagine how these crystals embed into carpet, padding and wood subfloor. When humidity hits these crystals, that nasty cat odor comes right back. These salt crystals are resistant to bleach and just about the strongest cleaners. Cat urine can cause thousands of dollars in damage and thereÂs only one way to solve the problem from my experience. Remove all the effected carpet and pad, which is usually the entire house if the cats have been allowed access. Sand down all areas of the subfloor with an orbital screen so a sealer can be applied to a clean and dry surface. Then apply two good coats of B-I-N Primer by Zinsser. Then relay new carpet after the primer has been allowed to dry and off gas for at least a few days but I prefer a week. Warnings: B-I-N Primer is nasty. Make sure you ventilate the area real well and wear the proper respirator. If not your head will be spinning and possibly sick to your stomach from breathing it. Ozone also occurs in nature such as during a lightning storm. Ozone however is not a friendly gas and care should be taken with true ozone generators. Ozone dissipates rather quickly but in concentrations it will kill plants and pets and can ruin rubber products in the home. You shouldnÂt be in the home breathing ozone.

The smells you are used to living with will never bother you (hmmm -- except maybe in extreme circumstances when the odor sucks all the oxygen out of the room! Yes, I was in real estate and experienced that.) You may think your cats ALWAYS used the litter box but obviously, others know better. Dogs aren't so bad because they don't spray the walls BUT they can also smell if you don't let them out and bathe them often enough. As far as wood floors go, you can't sand out cat urine. It will be there as long as the floor stays. Sorry --- you enjoyed your pets and this is the price. You will finally sell your house at a discount because you enjoyed those pets. Someone buying your house may have to replace drywall and floors and will expect you to pay for that. Sad but true.