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→Amendments
<tr><td>[[Iron filings (ZVI)]]</td><td>-</td><td>Proprietary</td></tr>
<tr><td>[[Iron filings (ZVI)]]</td><td>-</td><td>Proprietary</td></tr>
<tr><td>[[Red sand]]</td><td>Proven phosphorous retention</td><td>Proprietary</td></tr>
<tr><td>[[Red sand]]</td><td>Proven phosphorous retention</td><td>Proprietary</td></tr>
<tr><td>[[Sorptive media<sup>TM</sup>]]</td><td>Proven phosphorous retention</td><td></td></tr>
<tr><td>[[Sorptive media]]<sup>TM</sup></td><td>Proven phosphorous retention</td><td></td></tr>
<tr><td>[[Water treatment residuals]]</td><td>Waste product reuse</td><td>Proprietary</td></tr>
<tr><td>[[Water treatment residuals]]</td><td>Waste product reuse</td><td>Proprietary</td></tr>
</table>
</table>