SAN DIEGO (FOX 5/KUSI) -- HAZMAT was busy Sunday night cleaning a pool chemical spill after a pickup truck overturned on an El Cajon road. El Cajon Police, Heartland Fire and HAZMAT were called to a one-car accident at 4:24 p.m. Sunday at West Main Street and N Marshall Avenue in El Cajon. Service restored for Point Loma residents after water main break As you can see in the photo below, a pickup truck overturned onto its roof on N Marshall Ave in front of the Nissan car dealership near the intersection with West Main Street. HAZMAT was called in to clean what appears to be pool chemicals that spilled and mixed together on the road. HAZMAT cleaning pool chemical spill on El Cajon road (FOX 5/KUSI) What led up to the accident is unclear at this time, however officials did confirm DUI was not believed to be a factor. A few lanes of traffic were impacted, but are expected to reopen by 7 p.m. Sunday night. The accident remains under investigation.