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18 <br />Figure 3a: Field Screening Process <br />Screen outfall in high priority area No Check for signs of intermittent fl <br />flow <br />Flow found ~ Flow found I No flow <br />Inspect and sample flow <br />Investigate source of flow, <br />considering <br />the following: <br />• Jurisdiction-wide information <br />collected <br />• Field investigation of drainage <br />area of <br />outfall <br />Remove illegal discharge <br />Outfall OK <br />'" Checking for intermittent flow includes rechecking outfall at a later date as well as <br />visual observations far evidence of intermittent flow. <br />Note: Analytical monitoring is required only if an obvious source of the dry weather <br />flow cannot be determined through an investigation of the upstream stormwater <br />collection system. <br />