I use about 2 to 3 oz 35% Food grade H2O2 (Hydrogen-Peroxid) in a sink full of water to treat all my veggies, fish, meats, chicken etc. Works for me.
As far as E Coli bacteria, it's the most prolific form of bacteria on the planet and present in our bodies in large numbers at any given time. An overabundance or infection of E Coli in the intestinal tract would cause intestinal gas, pain and bloating, vomiting and diahhrea (sp?) The intake of additional probiotics lessen the effects. It is a bacteria easily killed by H2O2.

If you are eating raw foods then get a cheap ozonator wash everyting in ozonated water. Ozone will also neutralize most toxins left over from fertalizers plus kill parasites and most of their eggs, and of course without bacteria all stays fresher in the fridge for longer.

Hi, excellent question!
I asked Humaworm a similar question. He recommended using vinegar rather than baking soda. He did not say how much to use, so I can only report on what I've done. I wash the more solid veggies in hot water and organic soap recommended for vegetable washing - quickly, so as to not kill the enzymes in the vegetables. The leafy vegetables, I soak in the same water briefly. I rinse all off carefully with cold water (unfortunately unfiltered, at this time, I recommend a filter when you can get one) and then soak all the vegetables for 3 - 5 minutes in vinegar. Then I rinse all the vegetables again in cold running tap water and put them in brown paper bags in the fridge. They seem to last longer in paper bags or wrapped in a towel than in plastic or open.//www.curezone.org/forums/fm.asp?i=127348

Here is a link to an excellent suggestion for spraying vegetables (maybe better than washing and scrubbing in hot soapy water):

//www.curezone.org/forums/fm.asp?i=127348

The food grade H202 is probably a good alternative. I've also heard that mixing ascorbic acid powder (a kind of vinegar and Vitamin C) in the wash water might help. Washing with ozonated water would be excellent. But ozonaters are expensive, so in the meantime, you could try any of these solutions.
Any other ideas out there? Specific information about amounts of cleaners to use in water/use of hot versus cold water/timing would be helpful!