IRP Site 32 - Southeast Ravine

IR Site 32 is a 9-acre site near the southeastern corner of DFSP San Pedro. From 1943 through the 1970s, IR Site 32 received construction debris and uncontrolled waste materials. The ravine was originally 68 feet deep and is now completely filled in with debris and partially covered with fill soils. Debris placed in this area include concrete, asphalt, brick, and wood.

The Site Inspection was completed in 1993, and a remedial investigation (RI) was conducted in three phases in 2009, 2011, and 2012. Low levels of organic and inorganic chemicals including arsenic, lead, and manganese detected in soil and arsenic, cadmium, hexavalent chromium, and manganese detected in groundwater are believed to be associated with historical releases from debris, day-to-day operations at the tank farm, and surrounding industrial land uses. Risk assessment results from the RI indicate that site risk is within the risk management range. Additional sampling as part of a data gap investigation is proposed to determine whether site risk is still within the risk management range.