Capturing rainwater and discharge to the public sewer

The FAQ of SSc6.2 (http://www.leeduser.com/credit/NC-2009/SSc6.2#sthash.3UFoAJvd.dpuf) suggests that capturing the rainwater into tanks and discharging it into the public sewers after the rainstorm is acceptable way for meeting SS6.2 requirements as follows: “Is it an acceptable strategy to capture the rainwater into tanks and discharge it into the public sewers after the rainstorm reducing the peak discharge? This is a common strategy for reducing peak rate, which will help you comply with SSc6.1, but you'll need to add onsite reuse or infiltration to meet SSc6.2 requirements.” However considering the credit’s intent, i.e. “To limit disruption of natural hydrology by reducing impervious cover, increasing on-site infiltration, reducing or eliminating pollution from stormwater runoff and eliminating comtaminants, we feel that the mention strategy does not reduce the runoff but only delay the runoff to the latter time and the pollutions collected by the runoff still be released to the public sewer which should not meet the credit’s intent. In fact, We are interested to deploy this strategy for our project in order to comply with SSc6.1 but we still have some doubt. Could anyone affirm that this strategy help meet the SSc6.1 requirements.