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  1. City of Diamond Bar, California

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  1. City of Diamond Bar 
    21810 Copley Drive
    Diamond Bar California 91765
    Phone: (909) 839-7000
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  1. Monday - Thursday
    7:30 a.m. - 5:30 p.m.

    Friday
    7:30 a.m. - 4:30 p.m.

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