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MOUNTAIN HOUSE SAN JOAQUIN COUNTY MITIGATION MONITORING PROGRAM Impact' Mltlgatlorl Measure Monitoring Person/Agency Timing or Requirements Responsible' Frequency of STORM DRAINAGE Monitorin ' M4.4.3-1 a)Any proposed plans for construction or grading which Include a detention basin Review Operations SJCBD DP The accumulation of floating debris and shall Include a proposed schedule and description of necessary routine and Maintenance petroleum residual In detention ponds could maintenance activities for such detention basins)(including access roads). The Manual. create a nuisance condiWn(e.g.,odors, maintenance plans may be in the form of a general operations and maintenance mosquito Infestation,and excessive algae manual or may be specific to the detention basin(s)for which conslructlon/grading growth)and cause adverse aesthetic effects. plans are being submitted. GAS AND ELECTRICITY 4.4.4-1 a)Construction plans shall be submitted to PG&E and other easement owners for Documentation from SJCCDD C in applicable The Master Plan does not provide review prior to construction in applicable specific plan areas.In particular,the PG&E areas specifications for moving existing utilities and construction plans should identify proposed land uses in utility easements,and establishing easements. procedures for movement of heavy machinery over pipelines installed In non- roadway areas which may not be designed to withstand forces exerted by heavy loads. HYDROLOGYAND WATER QUALITY M4.7-1 The Specific Plan for Neighborhood K should Include the following Objective, SP for SJCDPW SP for K Increased sedimentation within Old River Policy,and Implementations under Parks and Recreation as mitigation measures Neighborhood K. would be caused by runoff from Mountain for reduction of sedimentation Impacts related to construction and operation of the House Creek and operation of the proposed proposed marina: marina. Objective: To ensure that the design and operation of private recreation areas do not adversely affect water resources. Policy: The marina on Old River shall be designed,constructed,operated,and maintained to minimize the accumulation of sediment within the marina and the Old River Channel. Implementation: a) A dredging plan shall be developed at the specific plan stage for the Marina Review of Plan. SJCDPW SP for portion of Neighborhood K along Old River for removal of accumulated sediment Neighborhood K from the Old River channel in the area of the proposed marina outlet. This plan shall comply with the requirements of dredging permits Issued by the U.S.Army Corps of Engineers and shall have provisions for controlling turbidity during dredging. b) Prior to obtaining a dredging permit,a disposal area for the dredged sediments shall be established by the applicant and approved by the Central Valley Regional Review of disposal SJCDPW DP for the Marina Water Quality Control Board. The disposal area shall be Identified in the and sampling plan, recommended dredging plan. The characteristics and design of the dredge disposal area shall minimize the potential discharge of sediments to surface water and potential discharge of contaminants to the surface water or groundwater. A sampling plan to evaluate the potential levels of contaminants within the sediments shall be incorporated In the recommended dredging plan. The collected samples shall,as a minimum,be analyzed for trace metals,salts,pesticides,and herbicides. PAGE