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• APPENDIX A - SWMP (cont.
<br />Page 2-A
<br />You can then use the USGS map as a guide for preparing your site map, which will be more detailed. Regazdless of the
<br />source of the base map, the site map needs to be of suitable scale m show the i~ustrial portion of the facility and the
<br />features within it.
<br />Locations of stormwater outfalJs:
<br />If the site has a stormwater drainage system, the location of outfalls is a simple task. Indicate on the map where
<br />pipeline outfalls aze, as well as the general layout of the drainage system such as inlets, grates, pipelines, etc. If
<br />stormwater is wnveyed over land without a developed storm drainage system, the points where runoff collects and
<br />stns off must be located.
<br />Drainage basins for each outfall:
<br />Field inspection can usually accomplish this task with acceptable accuracy. Look for high aeeas such as crests of
<br />parking lots, roads, etc. which would form the division between drainages. Gullies and swales aze indicators of
<br />stormwater flow direction. Obviously, if runoff is observed during a storm, most uncertainties can be eliminated.
<br />Surface water bodies (including dry water courses):
<br />Mark on the site map any surface water bodies, including lakes, streams, springs, wetlands, detention ponds,
<br />roadside or irrigation ditches, etc. These do mt necessarily heed to be within the facility, but may be adjacent to it
<br />or impacted by stormwater runoff. Also include any existing storm sewers.
<br />Existing structural control measures to redact stormwater pollution:
<br />Show on the snap the location of any structural stormwater pollution control measures, such as detention ponds,
<br />diversion ditches, covered material storage areas, fuel farm secondary containment structtues, etc.
<br />In addition, there aze several other features which could be included to make the SWMP a more comprehensive and
<br />usable plan. For example, later sections of the SWMP will
<br />can include a site map showing where materials aze stared.
<br />information would be in one place on a single base map.
<br />Materials handling and loading areas
<br />-~ Materials storage areas
<br />-~ Paved and unpaved aeeas (for hydrologic assessments)
<br />include requirements for spill prevention procedures, which
<br />By including the following items on the site map, all
<br />2. QeseripsYon ojPatnstial Poi2t~mrt Sources/Mataial Ltor~ttorj
<br />The plan shall provrdt a description ojall potential sorrces (otttvitlts and materials) which may nasonably 6e
<br />expected to add pollutants to stormwater discharges. Such sources may rrtclude haul roads, equipment storage and
<br />maintenance areas, Joel storage areas, etc.
<br />In each case where stormweaer polhttion potentaa! exists, appropriate pnventive measures must be taken and
<br />documented
<br />This section of the SWMP summarizes the existing potential for stormwater contamination at the site. It is a narrative
<br />descripton which states what is stored, where it is stored, how it is used, what has been used, etc. These can include
<br />such pollutants as fuels, oils, detergents, pesticides, herbicides, fertilizers, etc.
<br />3. Stormwatei Qttaliij Controls
<br />Each mining site covered by this plan shall develop a description ojstormwoter quatiry consols appropriate jor
<br />that site, and implement such cowols. The appropriateness and priorrtits ojeontrols in the plan shall reJleet
<br />identJied potential sources ojpollutmtts at the site. The description ojswrmwater quality controls shall address
<br />the following minimum components, including a schedule jor unplementing such eorwols:
<br />This section of the SWMP, when completed, will spell out what the facility is doing to control stormwater pollution,
<br />what the facility will do in the future, when Best Management Practices (BMPs) will be implemented, and who at the
<br />facility is responsible for the plan.
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