HYDRO30035

• Permit No: C1981035
• IBM Index Class Name: Hydrology
• Doc Date: 6/2/1993
• To: MLRD
• Permit Index Doc Type: CORRESPONDENCE
• Media Type: D
• Archive: No

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999 V III
Harry Ranney
Reclamation Sper_ialist
Mined Land Reclamation Division
Colorado Dept. of Natural Resources RE.C~IV~ D
1313 Sherman St. Room 215
Denver CO 80203
JUN 2199
May 29, 1993
Division of ivlmerais a Geoioyg
Dear Harry,
At your request I have initiated work on a Contaminant
Containment Plan for National King Coal Mine. During a site visit
Jirn Del,azio and I identified 3 possible sources of chemicals
which could result in a spill. The first ins a 500 gallon diesel
storage tank located on the soutt, end of the scale house. The
other two are oil storage tanks. Located behind the scale ho,~se,
on the west side are 13-55 gallon barrels of motor oil. South of
this site, about halfway to the mine adit, is a larger tank of
oil which is used in the mine and recirculated. At this time I do
not know the volume of oil kept in this tank, but assuming it is
corr,pletely full a corsservative estimate would be about 3700
gallons. If all tanks and barrels are full this totals to a
maxirnurn potential of about 5000 gallons of petrochemicals on the
site. This is 0.015 acre feet. The act,.tal amo,ant co,ald be
substantially less than this estimate.
The regulations presented on pages 9 and 10, part 1, of the
Storm Water Management Plan, CDPS General Permit for Coal Mining
Facilities ... paragraph k), state that the intent of this;
Corstairsmerst Plan is to preverst and contain spills which have a
reasonable probability of having a visible or otherwise
detrimental impact on waters of the State. In footnote 2 an
exettsption is given to sites which can argue that a spill would
not impact waters of the State. These regulations imply that
waters of the State refer to surfar_e water s,.rch as lakes, streams
or ephemeral channels. Two pieces of documentation are required
for substantiation of an exemption. The first is the distance
from the chemical source to tYse nearest surfaces waters, and
second is a detailed desr_ription of any str,,rct,.rres which prohibit
the release of material onto the ground or into a conveyarsce
,ysterrs.
At the National King Coal Mirse there are several factors wFsich
might qualify it for an exemption. First, is the fact that the
total volurr,e of ct,ernicals is relatively small. Even at the
maxirnurn of 0.015 acre feet., which as s,ames all tanks are full and
completely spill at the carne time, this volume of fluid doesn't
go far irs an overland flow sit,aation. Spread o,at over an acre of
irnperrnable surface this would result irs a depth of less thars 0.2
inr_hes. If the intent iss to keep the r_ontaminar,ts from natural
surface waters, the drainage system at the mine has been designed
and constr,.rcted to prevent any flow generated on the site from