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<br />B&B Eccavating, Inc. - Mougomery Gravel Pit Stormwater Management Pfau Page 7 <br />~r~ <br />L: <br />1 <br /> <br />1 <br /> <br /> <br /> <br />1 <br /> <br /> <br />If discharge of stormwater does occur, sampling will be performed in accordance with the <br />requirements of the Colorado Department of Health's (CDOH) sand and gravel construction <br />stotmwater dischazge permit. These sampling requirements are summarized below: <br />Effluent Parameter <br />Flow, MGD <br />Oil and Grease, mg/1 <br />pH, s. u. <br />Total Suspended Solids (T'SS), mg/1 <br />Total Dissolved Solids, mg/1 <br />Total Phosphorus, mg/1 <br />Measurement Frequency Sample Tyke <br />Weekly Instantaneous <br />Weekly Visual <br />Monthly Grab <br />Monthly Grab <br />Quarterly Grab <br />Quarterly Grab <br />*Or when a stormwater discharge occurs. <br />:.. ... <br />;.. <br />,. <br />:..:........:.: STORMWATER MANAGEMENT CONTROLS .;:, :: ;':; : ; :;:':; :;;.;.; <br />A.' ..::::$WMP: AD1yIINLSTRATOR .::. <br />The safety team is responsible for daily SWMP (Stormwater Management Plan) administration. <br />Local B&B contacts are Scott Hoover (General Manager) and Betsy Murry (Safety Coordinator). <br />,. <br />B~ :.::.RLSg IDENT)T'ICATION AND ASSFSSMIIVT .. <br />It is anticipated that no stormwater dischazges will occur from either Basin A or B. The <br />perimeter berm as required in the Special Use Perini[ will capture on-site runoff produced by <br />the 100-yeaz storm event and will hydraulically disconnect the site from Skillman Gulch and the <br />Eagle River. <br />As a result, the risk of pollutant loading via a surface water discharge is considered low. A <br />summary of estimated risks for the pollutant parameters required by the stormwater discharge <br />permit is presented below: <br />