RES 97128 - Laserfiche WebLink

b.l rVLV - I N C O Q P O Q A f ~ 0 early April (at the end of the rainy season). At least one midwinter site inspection could be added as dictated by heavy rainfall activity. The frequency of the additional inspections depends on the intensity and recurrence of rainfall. Site inspections will increase commensurate with increases in rainfall. At a minimum, inspections shall be made within 5 days whenever rainfall __ exceeds 2 inches in a 24-hour period as reported by the nearest Alameda County Flood Control District monitoring station. Additional inspections may be performed at the discretion of the GRAD Administrator or if requested by concerned residents. Specific inspection tasks include the following: • The engineer and/or geologist retained by the GRAD shall carry out an inspection of surface drainage ditches a minimum of twice per year. The inspection shall check for sedimentation - and cracking or shifting of the concrete-lined ditches. Repairs and maintenance as needed should be undertaken including removal of excess silt or sediment in ditches and patching or replacement of cracked or broken ditches. • Outlets of subsurface drains and horizontal drilled drains, if any, shall be checked. This - inspection shall take place at least twice annually, once in August and once in the spring. Any suspicious interruption or reduction in flow should signal a need to unplug or clean by flushing the affected drain. • Piezometers measuring ground-water level and any instruments such as inclinometers or __ settlement monuments measuring potential slope instability shall be monitored quarterly. • The GRAD will notify the City of Pleasanton when a GHAD inspection identifies a - condition on City property which could adversely affect GHAD property and/or the Covered Area. Such conditions would include, but not be limited to, evidence of landslides, mud flows, uncontrolled and/or diverted drainage, and/or standing water. • Inspections of the curb, gutter and roadway surfaces on those portions of the GRAD property - that cross a landslide repair or are proximate to a mapped area of slope instability shall be made. The inspections should check for cracking or offset of the roadway, curbs and/or gutters. Any measurable separation of cracks along the road should be recorded. Any suspicious cracking or offsets should be reported to the GRAD to determine whether further geotechnical studies are necessary. 4291-W2 July 17, 1997 _ Revised October 9, 1997 Revised October 22, 1997 t 5