When does the Statute of Limitations start for CA?

[Tony]

When does the Statute of Limitations start for CA? I had a credit card with a major bank back in 2006. The ending balance was $1500.00. The last payment or and activity I made on the account was made on 2/2007 and the first 30 day notification that showed up on my credit report was in 4/2007. The account was charged off in 7/2007 and sent to a collection agency and from what I can tell was sent to a second collection agency in 2/2010. I would like to pay this debt off when I have to funds to do so. I wanted to know can this new collection agency still try to sue me or has the SOL expired ? What percentage of the amount they are asking for should I pay? Once it is paid off how long before it falls off my credit report? Any help would be greatly appreciated