# Appendix B

Development of Adjusted New, Revised, and

Deleted Data Element Counts
Petroleum and Natural Gas Systems (Subpart W)

## Tables B

- 1 through B

- 8 show how the adjusted counts of new, revised, and deleted data

element s were developed for each of the petroleum and natural gas systems source category (subpart W) industry segments. In each table, the data in columns A through D are derived from
Tables 1 through 4, respectively. The data in columns E through G are calculate d by multiplying
the percentages in column D by the counts in columns A through C, respectively. The totals in
columns E through G represent the adjusted counts for the industry segment that are presented in

Tables 5 and 6.

Table B

- 1

. Onshore Petroleum and Natural Gas Production

Data Element Category Number of

New Data

Elements

(A) Number of

Revised

Data

Elements

(B) Number of

Deleted

Data

Elements

(C) Percentage

of facilities
reporting

these data

elements

(D) New Data

Elements
Adjusted

(E) Revised

Data

Elements
Adjusted

(F) Deleted

Data

Elements
Adjusted

(G)

Natural Gas Pneumatic Device Venting 3 0 0 83.50% 2.5 0 0

Natural Gas Pneumatic Pump Venting 2 0 0 69.38% 1.4 0 0

Acid Gas Removal 16 2 0 5.57% 0.9 0.1 0

Dehydrators 18 0 0 51.49% 9.3 0 0

Well Venting for Liquids Unloading 12 1 0 50.30% 6.0 0.5 0

Completions and Workovers with
Hydraulic Fracturing 7 1 4 39.36% 2.8 0.4 1.6

Completions and Workovers without
Hydraulic Fracturing 9 2 0 38.17% 3.4 0.8 0

Onshore Production Storage Tanks 10 1 11 83.70% 8.4 0.8 9.2

Well Testing Venting and Flaring 5 0 0 2.19% 0.1 0 0

Associated Natural Gas Venting and
Flaring 6 0 0 29.82% 1.8 0 0

Flare Stack Emissions 3 0 0 42.74% 1.3 0 0

Equipment Leaks by Population Counts 5 0 0 94.63% 4.7 0 0

EOR Injection Pump Blowdown 5 1 0 1.39% 0.1 0 0

EOR Hydrocarbon Liquid Dissolved

CO2 2 0 0 2.58% 0.1 0 0

Combustion 5 0 1 91.25% 4.6 0 0.9

Onshore Petroleum and Natural Gas

Production 13 0 0 100% 13 0 0

Totals 1 2 1 8 1 6

--- 60 3 12



## B

- 2

## Table B

- 2. Offshore Petroleum and Natural Gas Production

Data Element Category Number of

New Data

Elements

(A) Number of

Revised

Data

Elements

(B) Number of

Deleted

Data

Elements

(C) Percentage

of facilities
reporting

these data

elements

(D) New Data

Elements
Adjusted

(E) Revised

Data

Elements
Adjusted

(F) Deleted

Data

Elements
Adjusted

(G)

Offshore Petroleum and Natural Gas

Production 2 0 0 100% 2 0 0

Totals 2 0 0

--- 2 0 0



## Table B

- 3 . Onshore Natural Gas Processing

Data Element Category Number of

New Data

Elements

(A) Number of

Revised

Data

Elements

(B) Number of

Deleted

Data

Elements

(C) Percentage

of facilities
reporting

these data

elements

(D) New Data

Elements
Adjusted

(E) Revised

Data

Elements
Adjusted

(F) Deleted

Data

Elements
Adjusted

(G)

Acid Gas Removal 16 2 0 55.56% 8.9 1.1 0

Dehydrators 18 0 0 72.22% 13.0 0 0

Blowdown Vent Stacks 8 0 7 66.92% 5.4 0 4.7

Flare Stack Emissions 3 0 0 73.99% 2.2 0 0

Centrifugal Compressors 33 1 6 29.04% 9.6 0.3 1.7

Reciprocating Compressors 33 1 3 74.24% 24.5 0.7 2.2

Equipment Leaks by Leak Detection 3 0 2 93.69% 2.8 0 1.9

Onshore Natural Gas Processing 7 0 0 100% 7 0 0

Totals 121 4 1 8

--- 73 2 11



## B

- 3

## Table B

- 4 . Onshore Natural Gas Transmission Compression

Data Element Category Number of

New Data

Elements

(A) Number of

Revised

Data

Elements

(B) Number of

Deleted

Data

Elements

(C) Percentage

of facilities
reporting

these data

elements

(D) New Data

Elements
Adjusted

(E) Revised

Data

Elements
Adjusted

(F) Deleted

Data

Elements
Adjusted

(G)

Natural Gas Pneumatic Device Venting 3 0 0 70.84% 2.1 0 0

Blowdown Vent Stacks 8 0 7 93.52% 7.5 0 6.5

Transmission Storage Tanks 10 0 0 23.11% 2.3 0 0

Flare Stack Emissions 3 0 0 0% 0 0 0

Centrifugal Compressors 33 1 6 64.15% 21.2 0.6 3.8

Reciprocating Compressors 33 1 3 60.69% 20.0 0.6 1.8

Equipment Leaks by Leak Detection 3 0 0 93.52 % 2.8 0 0

Onshore Natural Gas Transmission
Compression 5 0 0 100% 5 0 0

Totals 9 8 2 1 6

--- 61 1 12



## Table B

- 5. Underground Natural Gas Storage

Data Element Category Number of

New Data

Elements

(A) Number of

Revised

Data

Elements

(B) Number of

Deleted

Data

Elements

(C) Percentage

of facilities
reporting

these data

elements

(D) New Data

Elements
Adjusted

(E) Revised

Data

Elements
Adjusted

(F) Deleted

Data

Elements
Adjusted

(G)

Natural Gas Pneumatic Device Venting 3 0 0 77.55% 2.3 0 0

Flare Stack Emissions 3 0 0 0% 0 0 0

Centrifugal Compressors 33 1 6 18.37% 6.1 0.2 1.1

Reciprocating Compressors 33 2 3 95.92% 31.7 1. 0 2.9

Equipment Leaks by Leak Detection 3 0 0 83.67% 2.5 0 0

Equipment Leaks by Population Count 3 0 0 79.59% 2.4 0 0

Underground Natural Gas Storage 3 0 0 100% 3 0 0

Totals 81 3 9

--- 48 1 4



## B

- 4

## Table B

- 6. Natural Gas Distribution

Data Element Category Number of

New Data

Elements

(A) Number of

Revised

Data

Elements

(B) Number of

Deleted

Data

Elements

(C) Percentage

of facilities
reporting

these data

elements

(D) New Data

Elements
Adjusted

(E) Revised

Data

Elements
Adjusted

(F) Deleted

Data

Elements
Adjusted

(G)

Equipment Leaks by Leak Detection 9 1 0 56.04% 5 0 .5 0

Equipment Leaks by Population Counts 7 0 0 0.00% 0 0 0

Combustion 5 2 1 46.70% 2 0.9 0

Natural Gas Distribution 7 0 0 100.00% 7 0 0

Totals 28 3 1

--- 14 1 0



## Table B

- 7 . LNG Import and Export Equipment

Data Element Category Number of

New Data

Elements

(A) Number of

Revised

Data

Elements

(B) Number of

Deleted

Data

Elements

(C) Percentage

of facilities
reporting

these data

elements

(D) New Data

Elements
Adjusted

(E) Revised

Data

Elements
Adjusted

(F) Deleted

Data

Elements
Adjusted

(G)

Blowdown Vent Stacks 8 0 7 87.5% 7 0 6.1

Flare Stack Emissions 3 0 0 0% 0 0 0

Centrifugal Compressors 33 1 6 37.5% 12.4 0.4 2.3

Reciprocating Compressors 33 1 3 87.5% 28.9 0.9 2.6

Equipment Leaks by Leak Detection 3 0 0 100% 3 0 0

Equipment Leaks by Population Counts 3 0 0 62.5% 1.9 0 0

LNG Import and Export Equipment 2 0 0 100.00% 2 0 0

Totals 85 2 1 6

--- 55 1 11



## B

- 5

## Table B

- 8. LNG Storage

Data Element Category Number of

New Data

Elements

(A) Number of

Revised

Data

Elements

(B) Number of

Deleted

Data

Elements

(C) Percentage

of facilities
reporting

these data

elements

(D) New Data

Elements
Adjusted

(E) Revised

Data

Elements
Adjusted

(F) Deleted

Data

Elements
Adjusted

(G)

Flare Stack Emissions 3 0 0 0% 0 0 0

Centrifugal Compressors 33 1 6 0% 0 0 0

Reciprocating Compressors 33 1 3 40.0% 13.2 0. 4 1.2

Equipment Leaks by Leak Detection 3 0 0 60.0% 1.8 0 0

Equipment Leaks by Population Count 3 0 0 0% 0 0 0

LNG Storage 3 0 0 100% 3 0 0

Totals 78 2 9

--- 18 0 1



## B

- 6