Attachment_26_-_Outfall_Flow_Masurements.pdf
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- BEP-RFP-15-0371
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Attachment 26 Outfall Flow Measurements
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Attachment 26
BUREAU OF ENGRAVING AND PRINTING
OUTFALL FLOW MEASUREMENT INFORMATION
ATTACHMENT 24 Page 1 of 3 Pages MNH
Reference number
Sewer Diameter (inches)
Descriptive Location of Sewer Connection or Discharge Point and Type of Discharge
Average Flow (GPD)
Open Manhole
Requirements
1 8
24" Diameter Manhole, Located 18' 7" from the West outter retaining wall and 13' 3" from the North outter retaining wall. This is on the West side of the Annex Building just North of the 14th Street Entrance of the building. 52,950
DC Permit Required
1A est 8 Annex building east side of 14th Street south or entrance. Covered and cannot be sampled. Sanitary 22,330
1B 14
30" Diameter Manhole, Located 63' 3" from the South corner retaining wall and 73' 8" from the West corner retaining wall. The is SW of the Annex Building in the street. East side of 14th Street at 14th and D Street SW.
This outfall is total of 1 and 1A and is used since 1A can not be sampled. Located in street at intersection.
Sanitary 75,280
DC Permit Required
2 12 South side of C Street between 13th and 14th streets SW. Storm NA
3 10
24" Diameter Manhole, Located 51' 2" from the Base of the metal handrail of the Annex Building 13th Street entrance and 52' 6" from the outside of the East outter retaining wall. This is on the East side of the Annex Building just South of the 13th Street Entrance of the building. East of center of street on 13th Street between C and D streets SW. Sanitary 17,300
DC Permit Required
4 12 North side of C Street between 13th and 14th Street SW.
Storm NA
5 8
24" Diameter Manhole, Located 16' 10" from the center of the Emergency Exit door from A-Wing and 37' 8" from the center of the turnstile at BM-12. 24,350
No DC Permit Required
6 10 South of Main Building at A Wing in the alleyway. Storm NA
7 NA
South of Main Building at A Wing midway between front and back of building. Steam return line to GSA NA
8 10 South side of Main Building A wing, in alleyway. Storm NA
9 8
24" Diameter Manhole, Located 50' 9" from the inside of the retaining wall just South of the steps and 28' 8" from the inside of the West retaining wall. This is on the West side of the Main Building near the Southern end of the building. 16,000
No DC Permit Required
OUTFALL FLOW MEASUREMENT INFORMATION
ATTACHMENT 24 Page 2 of 3 Pages MNH
Reference number
Sewer Diameter (inches)
Descriptive Location of Sewer Connection or Discharge Point and Type of Discharge
Average Flow (GPD)
Open Manhole
Requirements
10 8
24" Diameter Manhole, Located 50' 2" from the inside of the North retaining wall and 28' from the inside of the West retaining wall. This is on the West side of the Main Building near the Northern end of the building. 14,000
No DC Permit Required
11 10 East side of 15th Street located approximately 30 feet north of outfall 10. Storm NA
12 10 Northern side of Main Building. In midpoint of entrance way. Storm NA
13 10 Northern corner of Main Building. Storm NA
14 6
24" Diameter Manhole, Located 16' 6" from the center of the Emergency Exit door from D-Wing and 41' 9" from the NE corner of the closest column (1'8" Concrete Square Base) supporting the parking deck, which is SW of the manhole. 2,000
No DC Permit Required
15/16 8/8
28" Diameter Manhole, Located 11' 10" from the center of the Emergency Exit door from the PWPP and 37' 7" from the center of the Emergency Exit door on C-Wing. 2,000
No DC Permit Required
17 8
24" Diameter Manhole, Located 21' 10" from the center of the Emergency Exit door from B-Wing and 61' 10" from the center of the South overhead door at BM-5. 2,200
No DC Permit Required
18 3
24" Diameter Manhole, Located 23' 8" from the center of the Emergency Exit door from the WSWPP and 8' 4" from the SE corner of the closest column (1'8" Concrete Square Base) supporting the parking deck, which is NW of the manhole. 52,964
*2754
OUTFALL FLOW MEASUREMENT INFORMATION
ATTACHMENT 24 Page 3 of 3 Pages MNH
Reference number
Sewer Diameter (inches)
Descriptive Location of Sewer Connection or Discharge Point and Type of Discharge
Average Flow (GPD)
Open Manhole
Requirements
18A 3
West side of 14th Street located approximately 10 feet from end of C and D Wing. WSWPP and water conditioners from WSPP. Process 57,964
No DC Permit Required
*2796/3471
2. Monitoring for flow must take place a minimum of two (2) times or sampling periods. A sampling period consists of a one (1) week interval. Monitoring must be conducted in March and September of 2017.
1. Sampling for flow must be preceded by cleaning the outfall of any debris that will impede the flow measurement. If the measurement is impeded by debris the measurement must be repeated.
3. Outfalls 18 & 19 are measured by the process flow meters.
West side of 14th Street located approximately 10 feet from end of C Wing. PWPP. Process. 180
Note: Average flows are based on measurements taken for each outfall. Flow data for outfalls was collected from July 2007 and November 2007 and adjusted for 2013 usage, except for 18,18A, and 19 which is from 2013 flow data. Flow for outfall 3 is estimated due to meter fouling during both measurement periods, based on past data ratio and proportion.
Grey represents manholes/outfalls that cannot be sampled.
Yellow represents manholes/outfalls that must be sampled for flow.
BEP Manhole-Outfalls
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