L.A. Waterkeeper inspectors keep their minds on the gutters

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The environmental group’s DrainWatch program sends out Storm Water Assessment Teams to collect samples in an effort to force polluters to clean up. Their work has a black-ops feel. As they bottle up dirty water, investigators keep a low profile, look over their shoulders and eye passersby with suspicion -- and not without reason. Though they collect the samples from public sidewalks or streets, they’ve been chased off and even threatened by hostile property owners.