Hi Carole,
The deep cleaning of a commercial kitchen is not a job for the faint hearted or indeed the inexperienced!
You say you have already agreed to take this on, so we must make the best of a bad job.
Firstly, because of the involvement of the EHO, you must be able to supply your client with the following:-
1. Certificate of insurance (Public/Employers liability, if applicable) You should also make sure that any insurance you hold covers you for this type of wotk.
2. COSSH Sheets for any chemicals that you intend to use, you should also ensure that all chemicals are food safe.
3. Risk Assessments for each aspect of the job.
4. Although, not yet a legal requirement, you should also supply your client with a detailed method statement.
You should also realise that any cloths or wipes that you use on this job will as John has stated need to be thrown away, you will never be able to get them clean again, you will also use far far more than you first think! So your pricing needs to take this into account.
John is also correct in stating that the smell is pretty obnoxius, so getting an employee to work in hot, smelly conditions requires a good rate of pay, as the work is not at all easy either, unless your staff (if any) are very good, you could find that they may well refuse to attend the site the following day!
You should be aware, that all fittings will have to be moved in order to clean behind them, as well as to gain acces to the backs and sides of cookers, fridges etc.
Every inch, from the ceiling, walls, lights, pipes, appliancies, cupboards, switches, plugs, windows, ledges, floors etc will need to be cleaned.
Best way to clean is top down, using a commercial steam cleaner as the first method of attack, these are not cheap to buy, so see if you can hire one locally, again your pricing should take this into account! Failing that, food safe chemicals and lots and lots of hot water and hard graft!
Fridges, ovens, microwaves, grills will need cleaning inside and out, as will all hoses, pipes and electrical leads etc, ensure that these are all unplugged and switched off before cleaning.
You dont say anything about the size, fit out or the contents of this kitchen, so hard to say what sort of price you should have charged, but for even a small kitchen you should be talking at least a £1000.00, and sometimes much more, especially if you have to clean ducts, which again would probably need special equipment.
You must also remember, that before the kitchen will be allowed to re-open, EHO will need to visit to run some more tests, the officer will not just look to see if the kitchen is clean, he/she will aslo very likely take swab tests as well, if the kitchen fails these tests, they will not be allowed to re-open, and your client will expect you to come and clean the kitchen again so that it can pass these tests, and you can bet your life that the client will refuse point blank to pay you any extra for this work, and may well decide to sue for loss of earnings whilst the kitchen remains closed!
AS john said, it would be good to have feed back from you on how this job went, after all you requested help and advice, and your experience of completing this work could only help others.
Regards,
Rob