Differences

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--- oil_and_grease_control [2022/05/11 09:22] – admin
+++ oil_and_grease_control [2023/06/15 14:29] (current) – admin
@@ Line 1: / Line 1: @@
 ====== Oil and Grease Control ======
-For commercial or industrial development with greater than 40 parking stalls or where the potential for pollution by oil and/or grease exists, the first half inch of runoff must be treated using the best technology available.  This requirement may be waived by the plan reviewer only when the applicant can demonstrate that installation of such practices is unnecessary.
+For development with greater than 40 parking stalls or where the potential for pollution by oil and/or grease exists, the first half inch of runoff must be treated using the best technology available.  This requirement may be waived by the plan reviewer only when the applicant can demonstrate that installation of such practices is unnecessary.
 =====Approved Practices=====
 ====Bioretention====
-Please see the [[Bioretention Basin]] page for information on this practice.
+Please see the [[Bioretention Device]] page for information on this practice.
 ====Sorbent Inlet Filters====
@@ Line 58: / Line 58: @@
   *Replacement of rock may be difficult
-The trench needs to have the volume to treat the first half inch of runoff, either through total void space or through hydrologic modeling. The trench must also have a way to draw down between storms, typically with an underdrain. Because this trench does not have pretreatment, it is assumed to be clogged and may not take credit for infiltration.
+The trench needs to have the volume to treat the first half inch of runoff, either through total void space or through hydrologic modeling. The trench must also have a way to draw down between storms, typically with an underdrain, and be lined with geotextile fabric to prevent soil migration. Because this trench does not have pretreatment, it is assumed to be clogged and may not take credit for infiltration.
-The trench must be inspected regularly to ensure that the device is functioning properly and rock replaced when it becomes ineffective. The rock will become blacker and less effective as it gets coated with oil and grease.
+The trench must be inspected regularly to ensure that it's functioning properly. Replace the rock when it becomes coated with oil or grease (i.e. black-colored) or if it becomes filled with sediment.