2002 W Alton Ave - Soils Report - Laserfiche WebLink

Home Browse Search

Project No. D-3885-06 Christ Our Savior Catholic Parish It should be noted that the soils are susceptible to excessive erosion if exposed to running water. We recommend that all surface runoff should not be allowed to pond above or flow freely over adjacent slope surfaces. Collected water should be conveyed via a non- erosive device to a suitable storm drain system. Groundwater was encountered within the depth of l4 to 23 feel al the time of our drilling. Groundwater is anticipated to affect the site adversely. However, these observations reflect site conditions at the time of the investigation and do not preclude changes in local groundwater conditions, localized seepage due to variations in rainfall, heavy inigation, damaged structure (pipes, etc.), or altered site drainage pattem(s). Historic high groundwater depth was approximately S-feet based on CGS Newport Beach Quadrangle Map, released April 17,1997. The potential for ground water to rise to the ground surface in the site area is considered to be very unlikely. Faulting and Seismicity There are no known or mapped active faults, which, if projected would trend through or near the site. The property does not lie within an Alquist-Priolo Earthquake Fault Zone as designated by the California Geological Survey (CGS). For these reasons, the potential for direct surface fault rupture at the site is considered very low. The closest known active fault is the San Joaquin Hills Blind Thrust fault. The fault is located 0.69-mile to the south of the site. The San Joaquin Hills Fault has been assigned maximum magnitude of 6.6 and a slip rate of 0.5 mm per year. The other active fault close to the site is the Newport-lnglewood (L.A. Basin) Fault which is 5.51 miles (8.82 km) away. Newport-Inglewood (L.A. Basin) fault has been assigned maximum magnitude of 7.1 and a slip rate of 1.5 mm/year. Newport-lnglewood (L.A. G roundwater 5