CCB0053_Insp_20180906

Race Park USA (CCB0053) Coal Ash Structural Fill
Site Visit Notes and Photolog
9/6/2018 — DWR staff from the MRO conducted a site visit to observe/document site conditions regarding the coal ash
structural fill located on the property formerly owned by Race Park USA. Exposed coal ash was observed along a portion
of the construction road identified on the map below. Extensive coal ash deposits were also observed in the sediment
basin identified on the map below. Coal ash was also observed surficially and intermixed with soils in the northern berm
of the sediment basin. Surficial ash deposits were also observed on the southern side of the construction road identified
on the map below. MRO spoke with the construction superintendent who are currently building apartment complexes
on the west/northwestern side of the property. He informed MRO that there are future plans to build more apartment
complexes on the eastern portion of the site, which is where the documented 6-acre (45,000 cubic yard) coal ash
structural fill is located. MRO briefly discussed that any plans to disturb the coal ash structural fill would require
notification/coordination with DWR/DWM.

Photo 1: Exposed coal ash in "eroded ditch" along construction road (see map above).
Photo 2: Coal ash exposed in "eroded ditch" along construction road (see map above).

Photo 3: Sediment basin — coal ash was observed in extensive deposits. Also note, the berm located where the arrow
points, is where soils intermixed with ash material was observed.
Photo 4: Corrugated plastic pipe that conveys stormwater to the sediment basin.

Photo 5: Full view of sediment basin where coal ash deposits were observed.
Photo 6: View of pond which water from the sediment basin flows to. No coal ash was visually observed in the pond.