Tainted groundwater from old Rocketdyne plant stirs concern anew

Officials with the Los Angeles Regional Water Quality Control Board are reviewing findings from RTX Corp., the owner of the former Rocketdyne site, seeking to test soil and groundwater at several businesses, homes and the Westfield Shopping Mall for contamination. The vast 47-acre property in Warner Center sits across the street from bustling Westfield Topanga Mall, and is one of the largest undeveloped sites in Los Angeles.

The former Rocketdyne parcel has been undergoing an extensive...