Gathering contact details

I am working on a project with a company that has visited hundreds of schools to provide safety presentations. They now want to get back in touch by e-mail to conduct a survey, but they do not have e-mail addresses.

This project requires someone to go through a spreadsheet of school name and addresses and find about 600 e-mail addresses by googling the school's website and getting an e-mail address of the secretary or equivalent off the website.

This is legitimate because the communications will come from a company that has a relationship with each school in the list and therefore the communication is a 'follow up' not 'unsolicited'.

Not the most interesting of jobs in the world, and I am looking for a fixed price for 600. I estimate this will be about ten hours concentrated work, more if you include coffee breaks and the need to occasionally walk around to clear your head.