Automated cars driverless testing regulation

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            <th scope="col">Contaminant</th>
            <th scope="col">Site-specific standard (Micrograms per cubic metre)</th>
            <th scope="col">General air standard comparison (Micrograms per cubic metre)</th>
            <th scope="col">Averaging time</th>
            <th scope="col">Approval date</th>
            <th scope="col">Expiring</th>
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            <td>Suspended particulate matter</td>
            <td>169 <abbr title="microgram">µg</abbr>/<abbr title="cubic metres">m³</abbr></td>
            <td>120 <abbr title="microgram">µg</abbr>/<abbr title="cubic metres">m³</abbr></td>
            <td>24-hour average</td>
            <td>March 27, 2015</td>
            <td>December 31, 2020</td>
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