(August 13, 2015, 11:42 AM EDT) -- SAN FRANCISCO — A commercial general liability insurer had at least a partial duty to defend an insured and an additional insured against allegations arising from breach of quiet enjoyment and demolition in an underlying lawsuit filed by tenants seeking damages for asbestos damages in a construction project, a California federal judge ruled Aug. 12 (Parklyn Bay Company LLC v. Liberty Surplus Insurance Corp., No. 13-3124, N.D. Calif.; 2015 U.S. Dist. LEXIS 106231)....