Under a negligence theory, Kesner v. Superior Court holds that manufacturers owe a duty of care to prevent harm resulting from secondary exposure to hazardous substances, such as asbestos or chemicals, 226 Cal. App. 4th 251, 171 Cal. Rptr. 3d 811 (2014). California’s duty to exercise an ordinary standard of care is defined by California Civil Code Section 1714 and the seminal 1968 case of Rowland v. Christian. 69 Cal. 2d 108, 443 P.2d 561 (1968). To determine whether a defendant met the ordinary standard of care …