I am going to add to what others have said.
First, you will have to put more effort into your writing. What you write, whether it be a statement of purpose or a thread in a forum, is a reflection of what you are capable of.
Second, you are very involved in chemical and biochemical science through the ACS, UC Berkeley, and San Francisco State University. You should highlight how involvement with these three institutions has developed your critical thinking ability. If professors involved with these institutions can vouch to your ability in their letters, since your ability may not be highlighted in your GPA, then you have a chance at being accepted to many PhD programs.
Last, apply to private universities as opposed to public ones. There is a lot of funding issues with supporting international PhD students at public universities. Thus, international students may have a harder time competing for public PhD programs.
Best,
A SFSU alum