I worked 7 days in a row with a total of 56 hours.My boss is paying me
time and a half for the 16 hours.Should I get double time for the 6
hours on the 7th day?

Hi mistyblue56,

No, sorry, you are not entitled to double time for the six hours on
the seventh day.

Double time only starts after twelve hours in one day, or after eight
hours on the seventh consecutive day of work.  So six hours on the
seventh day doesn't qualify either way.

References:

Overtime page from the California Division of Labor Standards Enforcement
http://www.dir.ca.gov/dlse/FAQ_Overtime.htm

A more readable summary from Compensation.BLR.com
http://compensation.blr.com/compensation/california_overtime_laws.cfm

--efn

Thank you!

CALIFORNIA LAW 

http://www.leginfo.ca.gov/calaw.html

Industrial Wefare Commision wage orders(required to be posted b employer)

http://www.dir.ca.gov/IWC/WageOrderIndustries.htm

You might want to contact a labor orginization close to you about
organizing. Its a challenge, but with success comes fairness and other
benefits. But be carefull.