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Redwood City <br /> Water Quality Monitoring Program Plan <br /> <br /> <br />© 2014 DKF Solutions Group, LLC Page 25 of 41 <br /> <br />H. Surface Water Maps <br /> Maps of surface waters in the Redwood City service area that may be impacted by an SSO <br />are located in Attachment F. <br /> <br />I. Follow Up Sampling <br />1. Sampling will be repeated every 24 hours, or as directed by the RWQCB or San Mateo <br />Environmental Health Department, until such time as one of the following criteria have <br />been met: <br /> The San Mateo Environmental Health Department or the RWQCB indicates follow up <br />sampling is no longer required, or <br /> Both the ammonia and bacteria levels downstream are approximately equal to or less <br />than the upstream levels; or <br /> The concentration of ammonia is at or below that of the upstream sample, or the un- <br />ionized ammonia is below 0.4 mg/L as N; or <br /> The concentration of Enterococcus Bacteria levels are below the applicable acute <br />water quality objective listed in the table below, which was excerpted from the Basin <br />Plan. <br /> <br /> <br />Table 9.1 Excerpt of Table 3-1 of the June 2013 SF Bay Area Basin Plan <br />Beneficial Use Fecal Coliform <br />(MPN/100mL) <br />Total Coliform <br />(MPN/100mL) <br />Enterococcus Bacteria <br />(MPN/100mL) <br />E. coli <br />(MPN/100mL <br />) <br />Estuarine and <br />Marine <br />Fresh <br />Water <br />Fresh <br />Water <br />Water Contact <br />Recreation <br />90th percentile <br />< 400 <br />no sample <br />> 10,000 <br />no sample <br />> 104 Max at 89 Max at 298 <br />Shellfish Harvesting 90th percentile < <br />43 <br />90th percentile <br />< 230 -- -- -- <br />Non-contact Water <br />Recreation <br />90th percentile <br />< 4,000 -- -- -- -- <br /> <br />J. Surface Water Sampling SOP <br /> The Surface Water Sampling SOP, Attachment 2, provides step-by-step procedures to collect <br />samples and deliver them for analysis in accordance with Sections 6, 7 and 9. <br /> <br />6.2.A. - Page 191