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E/VGEO <br /> <br />INCORPORATED <br /> <br />GHAD Administrator or if requested by concerned residents. Specific inspection tasks include <br />the following: <br /> <br />The Engineer and/or Geologist retained by the GHAD shall carry out an inspection of surface <br />drainage ditches a minimum of twice each year. The inspection shall check for <br />sedimentation and cracking or shifting of the concrete-lined ditches. Repairs and <br />maintenance as needed should be undertaken including removal of excess silt or sediment in <br />ditches and patching or replacement of cracked or broken ditches. <br /> <br />Outlets of subsurface drains shall be checked. This inspection shall take place at least twice <br />annually, once in August and once in the spring. Any suspicious interruption or reduction in <br />flow should signal a need to unplug or clean by flushing the affected drain. <br /> <br />Piezometers measuring groundwater level and any instruments such as inclinometers or <br />settlement monuments measuring potential slope instability shall be monitored quarterly. <br /> <br />The GHAD will notify the City of Pleasanton when a GHAD inspection identifies a <br />condition on City property that could adversely affect GHAD property and/or the Covered <br />Area. Such conditions would include, but not be limited to, evidence of landslides, mud <br />flows, uncontrolled and/or diverted drainage and/or standing water. <br /> <br />Inspections of the curb, gutter and roadway surfaces on those portions of the GHAD property <br />that cross a landslide repair or are proximate to a mapped area of slope instability shall be <br />made. The inspections should check for cracking or offset of the roadway, curbs and/or <br />gutters. Any measurable separation of cracks along the road should be recorded. Any <br />suspicious cracking or offsets should be reported to the GHAD to determine whether further <br />geotechnical studies are necessary. <br /> <br />An annual inspection shall be made by the Geotechnical Engineer or Engineering Geologist <br />each August to assess the effectiveness of the preventive maintenance program and to make <br />recommendations as to what landslide or erosion control measures should be undertaken in <br />the next calendar year. An appropriate site-specific study of landslide or erosion conditions <br />shall be determined at that time. Consultants, if necessary, will be retained to undertake the <br />needed studies. The Engineer or Engineering Geologist shall prepare an annual inspection <br />report to the GHAD. <br /> <br />4992.5.001.01 <br />February28,2003 13 DRAFT2 <br /> <br /> <br />