Should I send low SAT subject test scores to UCs?

Tomorrow I will take SAT test on Math II and Chem. My self-test on Barron Math II and Chem are 610 and 550, respectively. Can I not to send low SAT subject test scores to UCs even though I really want to get science major(s)?
Btw I was an ESL student years ago, right now even though I have honors american lit but I did very bad on SAT reasoning test, a 1580 (R400+M690+W490). Math 690 in SAT I is about top 10% but 610 in Math II is way below average. Do you guys think SAT with a score of 1580 can apply a good UC college or not?

Those are really low scores…Reconsider your college list…Unless you cured cancer or something…

I’m done with the sat subject tests this morning. Math was not as hard as those on Barron, i can barely found 3 or 4 questions that based on trigonometry. Chemistry also was not that hard btw.

Glad they went well. Do not send bad subject test scores unless the school requires them. You should consider retaking your regular SATs to improve your score.

I have no more chance to retake SAT, senior is here.