Tenant's personal indoor AC unit leaked. Damaged flooring

[Jon L.]

Our tenant just moved in 3 months ago and brought his personal/portable AC unit. It leaked water into the next unit, out to the exterior, and warped half the family room laminates, which were installed a week before he moved in. 

His deposit is $1200k but I don't want to take from that now since he has another 9 months left on his lease. Am I allowed to bill about $4/sq ft to replace the laminates and baseboards or do I have to just take it from the deposit when he moves out? This is in California