BAY AREA AIR QUALITY
MANAGEMENT DISRICT
939 ELLIS STREET
SAN FRANCISCO, CALIFORNIA 94109
(415) 771-6000
Plant #1507  
Expires: OCT 1, 2000
This document does not permit the holder to violate any District regulation or other law.

No San Mateo County Sanitation District
153 Lake Merced Blvd
Daly City, CA 94015
S# DESCRIPTION [Schedule] PAID
1 STANDBY, Coml/Inst Reciprocating Engine, 5108 in3 displ
Methane Recovery Cogeneration System

Emissions at: P1 Stack

 [exempt] 0
8 Industrial Flare – Other (not refinery), 2750K BTU/hr max
Waste Gas Flare

[G1] 415
9 STANDBY, Reciprocating Engine – Elec Gen – Non-Cogen Only
 Emergency Generator #1

[exempt] 0
10 STANDBY, Reciprocating Engine – Elec Gen – Non-Cogen Only
Emergency Generator #2

[exempt] 0
11 Service Station G7423, 2 gasoline nozzles, Vehicle
Non Retail Gasoline Dispensing Facility

 [D] 48
15 Boiler for Space Heat only, 4188K BTU/hr max, Digester gas
Hot Water Boiler

 [B] 100
100 CHEM> Sewage, Wastewater treatment plant, Municipal sewage
Municipal Wastewater Treatment Plant

[F] 110
110 CHEM> Sewage, Preliminary treatment, Municipal sewage
Preliminary Treatment

Abated by: A3 Adsorption, Activated Carbon/Charcoal
  A4 Adsorption, Activated Carbon/Charcoal
  A7 Adsorption, Activated Carbon/Charcoal
Emissions at: P2 Stack

[G1] 415
120 CHEM> Sewage, Primary treatment, Municipal sewage
Primary Treatment

Abated by: A2 Adsorption, Activated Carbon/Charcoal
  A4 Adsorption, Activated Carbon/Charcoal
  A8 Adsorption, Activated Carbon/Charcoal
Emissions at: P3 Stack

[G1] 415
130 CHEM> Sewage, Flow equalization, Municipal sewage
Flow Equalization

Abated by: A2 Adsorption, Activated Carbon/Charcoal
  A7 Adsorption, Activated Carbon/Charcoal
Emissions at: P2 Stack

[F] 100
140 CHEM> Sewage, Secondary treatment, Municipal sewage
Secondary Treatment

Abated by: A6 Adsorption

 [F] 100
150 CHEM> Sewage, Secondary clarifiers, Municipal sewage
Secondary Clarifiers

[F] 100
160 CHEM> Sewage, Disinfection, Municipal sewage
Disinfection
[F] 100
170 CHEM> Sewage, Sludge handling processes, Municipal sewage
Sludge Handling Processes

[G1] 415
180 CHEM> Sewage, Digesters, Municipal sewage
Anaerobic Digesters

Abated by: A5 Adsorption
  A6 Adsorption

[G1] 415
The operating parameters described above are based on information supplied by permit holder and may differ from the limits set forth in the attached conditions of the Permit to Operate. The limits of operation in the permit conditions are not to be exceeded. Exceeding these limits is considered a violation of District regulations subject to enforcement action.


12 Permit Sources, 3 Exempt Sources
*** Permit Conditions ***
 ** Source Emissions **
** Plant Totals for Each Emitted Toxic Pollutant **

Source #1 subject to Condition ID #1460
Source #100 subject to Condition ID #3170
Source #170 subject to Condition ID #3168


CONDITION ID #1460
  1. S-1 shall be fired exclusively on digester sludge gas.
  2. Emissions of NOx (as NO2) from S-1 shall not exceed 8 grams/hp-hr, averaged over any one hour period.
  3. Emissions of NOx (as NO2) from S-1 shall not exceed 475 lb/day.
  4. Emissions of CO from S-1 shall not exceed 9 grams/hp-hr averaged over any one hour period.
  5. Emissions of CO from S-1, S-2 shall not exceed 535 lb/day.
  6. Within 60 days of the issuance of this permit, permittee shall submit to the District an engine maintenance plan and a source testing plan, which will ensure compliance with the above emissions limitations. This engine maintenance plan shall be certified by the manufacturer of the engine and both plans be subject to approval by the District. Failure by permittee to submit approvable plans to the District within the 60 days limit set forth herein shall constitute a violation of the conditions of this permit. Once such plans have been approved by the District, permittee's failure to comply with such plans shall constitute a violation of the conditions of this permit.
  7. Compliance with all of the above emission limitations shall be verified at least once per calendar year by means of a District-approved source test. This source test shall be performed in accordance with the plan to be submitted pursuant to condition #6 above.
  8. The District Permit Services Division and Source Test Group shall be notified, in writing, within 10 days of any schedule source test in order that District representatives may observe the test. Source test results shall be submitted to the Permit Services Division within 30 days of the performance of the source test. Source test data shall include fuel consumption, KW output, stack flowrate, O2 and NMHC, in addition to NOx and CO emissions.
  9. Any request for a change in these conditions (including but not limited to a request to change the conditions restricting simultaneous engine operation or use of fuels other than digester gas) shall require a new application for an Authority to Construct from the District. In the event that any such request for a change in these conditions will result in an increase in engine emissions above the level allowed under this permit, the engine shall be subject to the Best Available Control Technology level applicable to new internal combustion engines at the time of the request.

CONDITION ID #3168

  1. The total amount throughput of wastewater at this source shall not exceed 1022 million gallons. The total daily throughput of wastewater at this source shall not exceed 2.8 million gallons.
  2. This source shall be abated by an activated carbon scrubber with a control efficiency of 99% or greater.
  3. The daily throughput of wastewater shall be recorded in a District approved log and retained for at least two years from date of entry. This log shall be kept on site and made available to the District staff upon request.

CONDITION ID #3170
  1. The total amount throughput of wastewater at this source shall not exceed 10220 million gallons. The total daily throughput of wastewater at this source shall not exceed 28 million gallons.
  2. This source shall be abated by an activated carbon scrubber with a control efficiency of 99% or greater.
  3. The daily throughput of wastewater shall be recorded in a District approved log and retained for at least two years from date of entry. This log shall be kept on site and made available to the District staff upon request.

** SOURCE EMISSIONS **

Bay Area Air Quality
PLANT #1507

Management District Oct 21, 1999
Annual Average lbs/day
S# Source Description
PART
ORG
NOx
SO2
CO
1 Methane Recovery Cogeneration System
-
-
-
-
-
8 Waste Gas Flare
-
-
4
-
1
9 Emergency Generator #1
-
-
4
-
1
10 Emergency Generator #2
-
-
4
-
1
11 Non Retail Gasoline Dispensing Facility
-
85
-
-
-
15 Hot Water Boiler
-
-
7
1
2
100 Municipal Wastewater Treatment Plant
-
5
-
110 Preliminary Treatment
-
-
-
-
-
120 Primary Treatment
-
-
-
-
-
130 Flow Equalization
-
-
-
-
-
140 Secondary Treatment
-
-
-
-
-
150 Secondary Clarifiers
-
-
-
-
-
160 Disinfection
-
-
-
-
-
170 Sludge Handling Processes
-
-
-
-
-
180 Anaerobic Digesters
-
-
-
-
-
T O T A L S
90
19
1
5

** PLANT TOTALS FOR EACH EMITTED TOXIC POLLUTANT **

Pollutant Name
Emissions lbs/day
Benzene
.27
Formaldehyde
.08
Toluene
.87
Xylene
.10
Ethylbenzene
.06
Chloroform
.20
Methylene chloride
.13