Document JRqrzrmmOZ8VLYj5dDYZd162
FACT SHEET WATER POLLUTION CONTROL DIVISION
Conoco, Inc., Westlake Refinery
Conoco, Inc. owns and operates a petroleum refinery located in Westlake, Louisiana. The attached proposed permit is to coincide with the issuance of the EPA "second round" NPDES permit and includes updated language and monitoring requirements, and provisions for planned expansions. The permit limitations are based on the EPA 1982 final "BAT" guidelines for petroleum refineries.
I. Receiving Streams
A. Outfall 001 - Bayou Verdine B. Outfall 002 - Bayou Verdine C. Outfall 003 - Calcasieu River
II. Outfalls and Wastewater Sources
A. Present - flows based on May 29, 1981 EPA form 2C
1. Outfall 001 process wastewater - 1,538 gpm, 2.2 MGD
Desalter water, coker blowdown pond, ballast water, crude tank draw water, miscellaneous generation, cooling tower filter, backwash, boiler blowdown water, 105F pit overflow, cooling tower blowdown, sanitary sewer
2. Outfall 002 - stormwater runoff from process area - 0.12 MGD
3. Outfall 003 - stormwater runoff from tank farm area - 0.29 TO-------
B. Proposed - September, 1983, first stage of planned expansion
1. Outfall 001 - some increase in flow, however, no values are included in permit application
2. Outfall 002 and 003 - no change
C. Proposed - January, 1984, full attainment of planned expansion
1. Outfall 001 process wastewater - 1,783 gpm, 2.57 MGD
Desalter water, closed coker blowdown, ballast water, crude tank draw water, miscellaneous generation, cooling tower filter backwash, boiler blowdown, 105F pit overflow, cooling tower blowdown, sanitary sewer, fire water pond, stormwater diversion pond.
MCD 000002234
2. Outfa 11 002 - stormwater runoff from process area, 0.77 MGD
m3. Outfall 003 - stormwater runoff from tank farm area - 0.17 --
Treatment
A. Outfall 001
API separator, CPI separator, dissolved air flotation, equalization basin, activiated sludge, lagoon, additional dissolved air flotation. Coker blowdown undergoes initial Induced air flotation.
B. Outfall 002
C. Outfall 003
No treatment
Wastewater Characteristics
A- Present
1. Outfall 001 and 002 - (limitations apply to sum of 001 and 002} - Based on proposed permit limits
Approximate Effluent Characteristic Average concentration
Ib/day
Avg.
Max.
BOD Estimation not possible
TSS due to two separate
COD sources contributing
Oil & Grease
to total mass values
Phenol
Ammonia
Sulfide
Total Chromium
Hexavalent Chromium
pH
948 1 ,706 757 1 ,188 6,629 12 ,778 276 517
6.2 12.7 513 1 ,129
5.0 11.1
15.0 25.7 0.96 2.1
6- 9
2. Outfall 003 - based on proposed limits
Effluent Characteristic
Ib/day
Avg.
Max.
Oil & Grease TOC
pH
' 15 9-10 "--
B. Proposed with increase in vacuum distillation and delayed
coking - September, 1983
~
1. Outfall 001 and 002 (limitations apply to sum of 001 and
OUT)---------------------
Based on proposed limits
Effluent Characteristic
Ib/day
Avg.
Max.
BOD TSS COD Oil & Grease Phenol Ammonia Sulfide Total Chromium Hexavalent Chromium
1,278 1,021 8,933
372 8.3
693 6.7
10.3 1.3
2,300 1,602 17,218
697 17.1
1,525 15.0 34.7 2.8
2. Outfall 003
No change
C. Proposed with increase in thermal cracking - January 1984
1. nOuunt-fa--ll--0-0-1--a-n-d--0-0-2 - limitations apply to sum of 001 and
Effluent Characteristic
Ib/day
Avg.
Max.
BOD TSS COD Oil & Grease Phenol Ammonia Sulfide Total Chromium Hexavalent Chromium
1,393
2,508
1,114
1,747
9,740 18,772
405 760
9.L.
18.6
77.3
16.4
2.2
37.8
7J.4
__ 3.0
' 756 ' 1,663
2. Outfall 003
No change.
Plant History
A. December 16, 1970, SCC approved discharge permit.
B. 1974, a study on the Calcasieu Estuary recommended wasteload allocations for the area.
C. 1981, an industry sponsored study by AWARE, Inc. suggested that industrial discharges were not the major element in D.O. problems in the Calcasieu Estuary.
HCD oooo223e
D. 7983, an updated wasteload allocation study is due by the fall of this year.
E. During the 1982 calendar year, Conoco reported 8 excursions of federal permit limitations. This corresponds to greater than 99* compliance.
MCD 000002237