The civil engineer on our project made the following comment : "Item 6.2, quality control: all exfiltration trenches accepting rainwater discharge are "dry" and that is considered as pretreatment for quality control, best management practice in Dade County. Water not discharging to trenches will infiltrate in landscaped areas. In the past we have gotten this credit. HOWEVER, we can provide no evidence of removing 80% of suspended solids and there are no monitoring reports. If that's really required, it's a no go." Not being a civil engineer myself, I am looking for feedback on this please.

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Michael DeVuono

Regional Stormwater Leader

Arcadis North America

LEEDuser Expert

144 thumbs up

Tue, 11/12/2013 - 20:58

Tell him to cite the appropriate local BMP Manual, I'm sure they offer quidance on water quality. For instance, in PA, infiltration trench = 85% TSS removal. The reference manual also offers suggested removal rates, but this credit ultimately defers to the CE. Have him write up a report that details the removal efficiencies of the various BMPs. If he is comfortable with it, you should be fine.

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