SOURCE TEST REPORT

Total and Hexavalent Chromium Emissions

From Walker's Custom Chrome

Decorative Chromium Plating Tank

MONITORING AND LABORATORY DIVISION

STATIONARY SOURCE TESTING BRANCH

FILE NO: 06-05

DATE: July 5, 2006

APPROVED:

fJ~/~"T&

David Todd, Field Engineer

Source Test Section

fJ~no~~~

Source Test Section

tv\~T~- ~

Manjit Ahl}Ja, Chief"

Stationary Source Testing Branch

This report has been reviewed by the staff of the California Air Resources Board (ARB)

and approved for publication. Approval does not signify that the contents necessarily

reflect the views and policies of the ARB, nor does mention of trade names or

commercial products constitute endorsement or recommendation for use.
ACKNOWLEDGEMENTS

The project leader was Shobna Sahni assisted by Carla Takemoto and Robert Barrera

with ARB Stationary Source Division. The sampling team was led by David Todd and

included Angus MacPherson and Dan Leon with the ARB MLD and Robert Barrera with

ARB Stationary Source Division. Roxana Walker and Peter Samra with MLD Northern

Laboratory Branch conducted the laboratory analysis. Dominick Nole and Paramo

Hernandez with Alta Plating provided chrome plating assistance and expertise. Paramo

Hernandez of Alta Plating also provided onsite analyses for plating bath surface tension.

Additional plating bath analysis was provided by Anachem.

This report presents results based on samples collected and analyzed by the ARB staff

using ARB test methods. The results have been reviewed by the staff and are believed

to be accurate within the limits of the methods. However, data may have been affected

by variables that were not known to staff during sampling and review.
Page i

California Environmental Protection Agency

AIR RESOURCES BOARD

Monitoring and Laboratory Division

TABLE OF CONTENTS

I. INTRODUCTION..............................................................................................................1

II. PROCESS DESCRIPTION.............................................................................................1

III. WALKER'S CUSTOM CHROME SOURCE TEST......................................................2

IV. TEST METHODS .............................................................................................................5

V. QUALITY ASSURANCE/QUALITY CONTROL...........................................................7

VI. TEST RESULTS...............................................................................................................8

FIGURES

FIGURE II-1: Dummy Parts for Electroplating ......................................................................2

FIGURE III-1: ARB Capture Hood............................................................................................3

FIGURE III-2: ARB Sampling Location....................................................................................4

TABLES

TABLE VI. ARB Test Results .................................................................................................9

APPENDICES

A. ARB Sampling Results

B. ARB Laboratory Results

C. Field Data Sheets
Page ii

(This page is blank.)
Page 1

California Environmental Protection Agency

AIR RESOURCES BOARD

Monitoring and Laboratory Division

Total and Hexavalent Chromium Emissions from

Walker’s Custom Chrome

Decorative Chromium Plating Tank

I. INTRODUCTION

At the request of the Air Resources Board (ARB) Stationary Source Division (SSD), staff

of the Monitoring and Laboratory Division (MLD) performed emissions testing of a

decorative chrome electroplating tank operated by Walker’s Custom Chrome located at

2145 Grand Coulee Blvd. in Shasta Lake, California. Total and hexavalent chromium

emissions testing was conducted from February 15 through February 23, 2006.

II. PROCESS DESCRIPTION

Walker’s Custom Plating performs decorative chromium plating on a variety of small

parts including decorative automobile parts. Walker’s decorative chrome plating tank

has a capacity of about 500 gallons and is 96 inches long, 29 inches wide, and 42

inches deep. The plating tank is equipped with its own rectifier, and amperage and

voltage into the tank varies with the type and area of the parts to be plated. Plating bath

temperature was maintained at approximately 95 - 105° F during plating operations.

SSD staff periodically collected voltage, amperage, bath temperature, and amp-hour

readings for the plating tank during the source test.

Emissions from the plating tank are controlled through the use of a chemical fume

suppressant, Fumetrol 140, a South Coast Air Quality Management District (SCAQMD)

certified fume suppressant for chromium electroplating. Chemical fume suppressants

are used in plating baths to change the surface tension and reduce chromic acid mist

that is generated during plating operations. No plating tank ventilation system or

additional emissions controls are used (i.e. HEPA filter) at Walker’s. Any emissions

from the tank are emitted into the building and subsequently vented out through open

doors, windows, and vents.

As mentioned above, Walker’s normally performs decorative plating on a variety of

small parts. Normal usage is about 40 to 60 amp-hours per day for about two or three

days a week. For this source test decorative plating was increased to about 300 amphours per sample run (day) to insure a measured amount of chromium was collected.

Dummy parts were plated instead of Walker’s normal production. The dummy parts

were hollow metal tubes about 36 inches long and either 1.5 inches in diameter or 1.5

by 1.5 inches square. Both types were used at five to six dummies at a time. Examples

of the dummy parts are shown in Figure II-1. A total of 30 dummy parts were plated for
Page 2

each of three sample runs (W-11, W-12, and W-13). A fourth sample run (W-14) was

collected without any chromium electroplating in the tank.

Fig II-1: A sample of the dummy parts chromium electroplated during emissions sampling.

III. WALKER’S CUSTOM CHROME SOURCE TEST

The source test consisted of four individual sample runs. Three sample runs were

collected from Walker’s decorative chrome plating tank on February 15, 16 and 17, 2006.

During these sample runs the surface tension of the plating solution was about 35

dynes/cm which is a normal operating condition for this facility. A fourth “blank” sample

run was collected February 23, 2006, while the plating tank remained “idle.”
Page 3

ARB Method 425 was used to determine hexavalent and total chromium emissions

collected during the source tests. Each sample was collected continuously over a

four-hour period except the first sample (W-11) which was collected over a two-hour

period. During sampling, “dummy” parts were plated in the tank. The dummy parts

were necessary to obtain a target of about 300 amp-hours per run. Walker’s Custom

Chrome staff prepared each dummy part for plating, including stripping, each time a part

reentered the plating tank.

ARB staff built a ventilation system to carry any chromium emitted by the plating tank to

the source sampling area,(See Figures III-1 and III-2.). This ventilation system

consisted of a capture hood with an open bottom, open front, and plastic sheeting on

three sides and the top. A 12-inch diameter exhaust duct near the top back center of

Fig III-1: Walker’s decorative chromium plating tank with ARB capture hood and ducting.

the capture hood carried plating tank emissions from the tank and capture hood through

a sample collection area and then out toward an exit door. Surfaces of the hood and

duct assembly were made of plastic sheeting and PVC flex hose and rigid tubing. This

system was designed to allow droplets to return to the tank but collect fumes that
Page 4

floated above the tank. Per SCAQMD’s procedures for plating tanks and fume

suppressant certification, the average "lift" velocity between the tank and the ventilation

system was designed to be less than 50 feet/minute.

Fig. III-2: ARB sampling location including vertical sampling pipe (12-inch diameter)

and sample collection setup.

The capture hood was suspended above and around the plating tank by PVC pipes.

When suspended and in use, the bottoms of the capture hood plastic sidewalls

overlapped the back and sides of the plating tank. The open front of the capture hood

was high enough and wide enough to allow plating parts to be placed in the tank without

interference. “Smoke” sticks were used before and during sample runs to prove there

was no emissions "leakage" out of the hood, including the open front. That “smoke,”

titanium oxides and hydrochloric acid does not interfere with ARB Method 425 sample

collection and analysis.

12" Duct

Sampling console

Sample

probe and

support

Sampling

Sample

Impinger Box
Page 5

Flexible and rigid (straight) 12-inch diameter PVC pipe directed tank emissions from the

capture hood to the ARB Method 425 sample collection area. Method 425 samples

were collected from a vertical (12-inch diameter, 67 inches long) PVC pipe sitting on the

inlet to a fan box. Samples were collected from two, three-inch diameter holes cut 90

degrees apart into the vent stack and located 18 inches (11⁄2 duct diameters) above the

fan box and 49 inches (four duct diameters) below the flexible pipe connected to the

capture hood.

The fan box includes a variable flow controlled fan with a 5-foot, 12-inch diameter PVC

rigid pipe to exhaust tank emissions.

IV. TEST METHODS

A. Source Sampling Procedures

Samples were collected and recovered by ARB’s Stationary Source Testing Branch.

Stack and duct flows were determined by ARB Stationary Source Test Method 1

(velocity traverse), Method 2 (stack velocity and flow rate), Method 3 (stack gas dry

molecular weight), and Method 4 (moisture content). For Method 3, atmospheric

concentrations of carbon dioxide, nitrogen, and oxygen were used to determine dry

molecular weight.

Hexavalent and total chromium samples were collected isokinetically in accordance

with ARB draft Method 425, “Determination of Total Chromium and Hexavalent

Chromium Emissions from Stationary Sources.” ARB Method 425 was originally

adopted January 22, 1987, and amended July 28, 2002. For chromium sampling at

Walker’s there were some approved modifications to ARB Method 425. These

include the use of unheated sample lines and probes, the use of 0.1 N sodium

bicarbonate impinger solution in place of 0.1 N sodium hydroxide solution, and

deletion of the sample train filter and filter heater.

Each test day consisted of a four-hour run using a single sample train, except for the

first run which was only two hours. During the first run (Run W-11), 300 amp-hours

of plating were unexpectedly completed within two hours. As a result, that run was

reduced to two hours and only one diameter was traversed.

The chromium sampling train consisted of a 48-inch glass-lined stainless steel probe

with a 3/8-inch diameter glass nozzle, and attached Pitot tube and thermocouple

assembly for monitoring stack conditions. A ten-foot Teflon line connected the

probe to three Greenburg-Smith impingers used to collect and stabilize any

chromium sample. The first two impingers contained 100 milliliters each of 0.1

normal (N) sodium bicarbonate solution. A third, empty impinger was followed by a

cylinder of silica gel (final moisture collection), and a 25-foot umbilical line connected

to an isokinetic (Method 5) sampling console. The sampling console includes a
Page 6

vacuum pump, a dry gas meter, and additional monitors and controls for collecting a

sample isokinetically.

In accordance with Method 1, the sampling location required 24 traverse points (12

sampling points on each diagonal ninety degrees apart). As indicated above, Run

W-11 was on only one diagonal. All the other sample runs including the blank (Run

W-14) were completed using two diagonals.

In accordance with Method 2, thermocouples and Type S Pitot tubes bundled with

the sampling probes were used to determine stack velocity. The weight of the

impinger solutions and silica gel were recorded before and after each test in order to

obtain the moisture content of the stack gas in accordance to Method 4. In addition,

stack temperature, ambient temperature, and barometric pressure were measured

and recorded during each sample run. Leak checks in accordance with Method 5

were performed on each sample train and Pitot tube setup before and after each

sample collection. Leak check results were documented on the Method 425 run

sheets.

After sampling, rinses of the sampling train nozzle, probe and transfer line, as well

as the catch from the impingers, were recovered into three, 500-ml glass sample jars

as follows (all sample jars were pre-cleaned and tested to ensure the absence of

chromium prior to the source test):

• Container 1 - rinses from the nozzle, sample probe, and transfer line;

• Container 2 – first impinger catch; and

• Container 3 – second and third impinger catches.

The pH of the sodium bicarbonate solution used for the probe rinse and impingers

was maintained at ≥ 8.0. Additionally, the impinger solution was chilled with ice to

4°C (39°F) or less during sample collection. All samples were also chilled with ice

and refrigeration to 4°C (39°F) or less during transport and storage prior to analysis

to minimize the conversion of hexavalent chromium to trivalent chromium. During

sample recovery prior to analysis, disposable vinyl gloves were worn to help prevent

contamination. At the conclusion of each sampling week, staff transported the

collected samples to the laboratory for storage and analyses.

Amperage and voltage supplied by the rectifier was monitored by SSD staff during

the source test runs. SSD staff also monitored tank temperature and totalizer

amp-hours. In addition, plating bath samples were collected for laboratory analysis

to determine plating bath surface tension and chromic acid content.

B. Analytical Procedures

Laboratory analyses for hexavalent and total chromium of the collected stack

samples was performed by ARB’s Northern Laboratory Branch. Hexavalent

chromium (also known as hex chrome, Cr (VI), or Cr+6) was measured using ion
Page 7

chromatography (IC) in accordance with ARB standard operating procedure (SOP)

MLD039. The limit of detection (LOD) of the analytical procedure for hexavalent

chromium is 0.2 nanograms per milliliter (ng/ml). Total chromium was determined

using an atomic absorption/ graphite furnace (GFAA) technique using ARB SOP

MLD005. The LOD of the analytical procedure for total chromium is 1.0 ng/ml.

V. QUALITY ASSURANCE / QUALITY CONTROL

To ensure that collected data are consistent, relevant, and defensible, appropriate field

and laboratory Quality Assurance (QA) procedures were followed throughout the source

test. A detailed explanation of the ARB’s standard field and laboratory QA procedures

are contained in ARB Quality Assurance manuals, Stationary Source Test Methods, and

laboratory SOPs.

As required by ARB Method 425, all surfaces that came into contact with a sample were

either glass or Teflon and were pre-cleaned using the following procedure:

• the glassware and Teflon lines were first washed with detergent;

• soaked with a 10% solution of nitric acid for several hours;

• flushed with liberal amounts of tap water;

• rinsed with de-ionized water; and

• rinsed with 0.1 N sodium bicarbonate solution.

Extra pre-cleaned equipment was deployed to ensure that no equipment needed to be

re-cleaned or re-used during field sampling.

A blank source test (Run W-14) sample was collected at Walker’s with the ARB capture

hood and ducting after sampling. Run W-14 was collected similar to runs W-12 and

W-13. No changes were made to the sampling results based upon the results of Run

W-14.

The Type S Pitot tubes used for stack velocity determinations met the required

specifications for a baseline coefficient of 0.84 as specified in ARB Method 2. The

console assembly, including Pitot tubes, passed leak checks before and after each

velocity determination. In addition, all sampling train assemblies passed leak checks

before and after each sample run.

All test samples were collected using iced impinger sets. After recovery, samples were

placed on ice to maintain their temperature at or below 4 °C (39 °F) as required by ARB

Method 425. Collected and recovered samples remained on ice while on site and

during transport to the laboratory for analyses. Staff of the Northern Laboratory Branch

ensured that the samples were maintained at or below 4 °C (39 °F) in a sample

refrigerator while awaiting analysis.
Page 8

During sample collection and transport, the pH of the sodium bicarbonate solution used

for the probe rinse and impinger charging was maintained at ≥ 8.0 as required by

Method 425. This is necessary to ensure that any collected hexavalent chromium is not

reduced to trivalent chromium. The pH of the impinger solutions and sample train

rinses were checked before sampling and during sample recovery.

Chain of custody was maintained for all collected samples. A chain of custody sheet

was prepared for each sample run.

VI. TEST RESULTS

Results of the ARB Method 425 source tests for Walker’s Custom Chrome decorative

chromium plating tank are presented in Table VI-1. Chromium emission rates ranged

from 0.0050 to 0.016 milligrams per amp-hour (mg/amp-hr) for total chromium and

0.0037 to 0.012 mg/amp-hr for hexavalent chromium at a surface tension of about 35

dynes/cm. Emissions data and calculations are in Appendix A. Laboratory results are

presented in Appendix B.

There seems to be a significant difference in the emissions measured with Run W-11

compared to emissions measured with Runs W-12 and W-13. The reason for the

difference is not known. Run W-11 sampled for two hours on a single traverse

compared to four hours sampling on two traverses, 90o apart, for each of the other two

sample runs. For Run W-11, amp-hours were higher and surface tension slightly lower

than for Runs W-12 and W-13.
Page 9

Table VI

Walker’s Custom Chrome Chromium Plating Tank

Sampling Dates – February 15-23, 2006

Sampling Location

Sample Number W-11 W-12 W-13

Sampling Date 2/15/06 2/16/06 2/17/06

Plating Tank Data

Totalizer (amp-hours) 331 300 300

Production Rate (amp-hrs/hr) 165.5 75 75

Freeboard (inches to overflow) 4.75 4.5 5

Surface Tension (dynes/cm) 35.1 35.4 35.4

Chromic Acid Conc. (oz/gal) 34.8 34.8 34.8

Bath Temperature (oF) 90-100 92-105 98-107

Stack Data

Stack Temperature ( 0F) 65 61 61

Velocity (ft/sec) 19.2 20.2 21.6

Static Pressure ("H20) -0.26 -0.24 -0.25

Stack Area (sq. ft.) 0.785 0.785 0.785

Flow Rate (DSCFM) 899 958 1000

Moisture (% of v/v) 0.7 0.5 0.9

Sampling Data

Sampling Time (minutes) 120 240 240

Sample Volume (DSCF) 110.56 233.10 235.72

Chromium Data (ng/sample)

 Total Chromium 1700 5090 4680

 Hexavalent Chromium 1262 3232 3610

Isokinetic Rate (%) 105 104 101

EMISSIONS

Concentration (ng/dscm)

 Total Chromium 543 771 701

 Hexavalent Chromium 403 490 541

Emission Rate (mg/hr)

 Total Chromium 0.83 1.25 1.19

 Hexavalent Chromium 0.62 0.80 0.92

Emissions Factors

 (mg/amp-hr)

 Total Chromium 0.0050 0.017 0.016

 Hexavalent Chromium 0.0037 0.011 0.012

Standard Conditions = 68o F and 29.92 in. Hg. DSCF = dry standard cubic feet. DSCM = dry standard cubic meter.

DSCFM = dry standard cubic feet per minute.
(This page is blank.)
Appendix A

ARB Sampling Results
(This page is blank.)
A-1

MONITORING & LABORATORY DIVISION

STATIONARY SOURCE TEST BRANCH

TEST SUMMARY AND RESULTS

(FOR FIELD DATA RECORD)

FILE NO.: 06-05

PROJECT NAME: Walker's Chrome

RUN NO.: W-11

SUMMARY OF TEST DATA

---------------------

Volume of Gas Sampled (Vm): 111.72 cubic feet

Vm Meter Cal. Factor (Y) 0.973

Meter Temperature (Tm): 520 deg. R

Barometric Pressure (Pb): 29.79 inches Hg

Avg. delta H Orifice Press. (dH avg): 2.442 inches H2O

Pb + dH avg: 29.97 inches Hg.

O2 in Stack (%O2): 20.90 percent

CO in Stack (%CO): 0.0000 percent

CO2 in Stack (%CO2): 0.00 percent

N2 in Stack (%N2): 79.10 percent

Pitot Tube Factor (Cp) 0.84

Avg. of Sqrt. of Pitot Press. (/dP avg): 0.34 /(inches H2O)

Stack Temperature (Ts) 525 deg. R

Static Pressure -0.26 inches H2O

Absolute Stack Pressure (Ps) 29.77 inches Hg

Stack Dimensions 12 inches dia.

Stack Area (As) 0.785 square feet

H2O in Impingers and Silica Gel (Vlc): 16.7 milliliters

Sampling Time (t): 120 minutes

Nozzle Diameter (Dn): 0.375 inches

Total Chromium Mass Collected (Mn): 1,700 nanograms

Hexavalent Cr. Mass Collected (Mn): 1,262 nanograms

CALCULATED RESULTS

-------------------

Corrected Sample Volume (Vm std): 110.56 DSCF (68 deg.F)

Water Vapor in Stack (Bws): 0.7 percent by volume

Stack Gas Molecular Wt, Dry (Md): 28.84 lb/lbmole

Stack Gas Molecular Wt, Wet 28.76 lb/lbmole

Stack Gas Velocity (Vs): 19.20 feet/second

Stack Gas Flow Rate (Qs): 899 DSCFM(68 deg.F)

Isokinetic Ratio (%I): 105.0 percent

Total Cr Mass Conc. (Cs): 15.376453 nanograms/dscf

Hex. Cr. Mass Conc. (Cs): 11.414755 nanograms/dscf

Total Cr Mass Conc: 543 nanograms/dscm

Hex. Cr. Mass Conc: 403 nanograms/dscm

Total Cr. Emission Rate (Wm): 0.83 milligrams/hr Total Cr.

Hex. Cr. Emission Rate (Wm): 0.62 milligrams/hr Hex. Cr.

During Run W-11 plating was twice as fast as designed. As a result the test run was

2 hours instead of 4 and only one diagonal was sampled instead of two.
A-2

MONITORING & LABORATORY DIVISION

STATIONARY SOURCE TEST BRANCH

TEST SUMMARY AND RESULTS

(FOR FIELD DATA RECORD)

FILE NO.: 06-05

PROJECT NAME: Walker's Chrome

RUN NO.: W-12

SUMMARY OF TEST DATA

---------------------

Volume of Gas Sampled (Vm): 234.74 cubic feet

Vm Meter Cal. Factor (Y) 0.973

Meter Temperature (Tm): 520 deg. R

Barometric Pressure (Pb): 29.87 inches Hg

Avg. delta H Orifice Press. (dH avg): 2.758 inches H2O

Pb + dH avg: 30.07 inches Hg.

O2 in Stack (%O2): 20.90 percent

CO in Stack (%CO): 0.0000 percent

CO2 in Stack (%CO2): 0.00 percent

N2 in Stack (%N2): 79.10 percent

Pitot Tube Factor (Cp) 0.84

Avg. of Sqrt. of Pitot Press. (/dP avg): 0.36 /(inches H2O)

Stack Temperature (Ts) 521 deg. R

Static Pressure -0.24 inches H2O

Absolute Stack Pressure (Ps) 29.85 inches Hg

Stack Dimensions 12 inches dia.

Stack Area (As) 0.785 square feet

H2O in Impingers and Silica Gel (Vlc): 26.7 milliliters

Sampling Time (t): 240 minutes

Nozzle Diameter (Dn): 0.375 inches

Total Chromium Mass Collected (Mn): 5,090 nanograms

Hexavalent Cr. Mass Collected (Mn): 3,232 nanograms

CALCULATED RESULTS

-------------------

Corrected Sample Volume (Vm std): 233.10 DSCF (68 deg.F)

Water Vapor in Stack (Bws): 0.5 percent by volume

Stack Gas Molecular Wt, Dry (Md): 28.84 lb/lbmole

Stack Gas Molecular Wt, Wet 28.78 lb/lbmole

Stack Gas Velocity (Vs): 20.21 feet/second

Stack Gas Flow Rate (Qs): 958 DSCFM(68 deg.F)

Isokinetic Ratio (%I): 103.9 percent

Total Cr Mass Conc. (Cs): 21.836082 nanograms/dscf

Hex. Cr. Mass Conc. (Cs): 13.865269 nanograms/dscf

Total Cr Mass Conc: 771 nanograms/dscm

Hex. Cr. Mass Conc: 490 nanograms/dscm

Total Cr. Emission Rate (Wm): 1.25 milligrams/hr Total Cr.

Hex. Cr. Emission Rate (Wm): 0.80 milligrams/hr Hex. Cr.
A-3

MONITORING & LABORATORY DIVISION

STATIONARY SOURCE TEST BRANCH

TEST SUMMARY AND RESULTS

(FOR FIELD DATA RECORD)

FILE NO.: 06-05

PROJECT NAME: Walker's Chrome

RUN NO.: W-13

SUMMARY OF TEST DATA

---------------------

Volume of Gas Sampled (Vm): 242.52 cubic feet

Vm Meter Cal. Factor (Y) 0.973

Meter Temperature (Tm): 520 deg. R

Barometric Pressure (Pb): 29.22 inches Hg

Avg. delta H Orifice Press. (dH avg): 2.925 inches H2O

Pb + dH avg: 29.44 inches Hg.

O2 in Stack (%O2): 20.90 percent

CO in Stack (%CO): 0.0000 percent

CO2 in Stack (%CO2): 0.00 percent

N2 in Stack (%N2): 79.10 percent

Pitot Tube Factor (Cp) 0.84

Avg. of Sqrt. of Pitot Press. (/dP avg): 0.38 /(inches H2O)

Stack Temperature (Ts) 521 deg. R

Static Pressure -0.25 inches H2O

Absolute Stack Pressure (Ps) 29.20 inches Hg

Stack Dimensions 12 inches dia.

Stack Area (As) 0.785 square feet

H2O in Impingers and Silica Gel (Vlc): 44.7 milliliters

Sampling Time (t): 240 minutes

Nozzle Diameter (Dn): 0.375 inches

Total Chromium Mass Collected (Mn): 4,680 nanograms

Hexavalent Cr. Mass Collected (Mn): 3,610 nanograms

CALCULATED RESULTS

-------------------

Corrected Sample Volume (Vm std): 235.72 DSCF (68 deg.F)

Water Vapor in Stack (Bws): 0.9 percent by volume

Stack Gas Molecular Wt, Dry (Md): 28.84 lb/lbmole

Stack Gas Molecular Wt, Wet 28.74 lb/lbmole

Stack Gas Velocity (Vs): 21.63 feet/second

Stack Gas Flow Rate (Qs): 1000 DSCFM(68 deg.F)

Isokinetic Ratio (%I): 100.6 percent

Total Cr Mass Conc. (Cs): 19.854152 nanograms/dscf

Hex. Cr. Mass Conc. (Cs): 15.314848 nanograms/dscf

Total Cr Mass Conc: 701 nanograms/dscm

Hex. Cr. Mass Conc: 541 nanograms/dscm

Total Cr. Emission Rate (Wm): 1.19 milligrams/hr Total Cr.

Hex. Cr. Emission Rate (Wm): 0.92 milligrams/hr Hex. Cr.
A-4

MONITORING & LABORATORY DIVISION

STATIONARY SOURCE TEST BRANCH

TEST SUMMARY AND RESULTS

(FOR FIELD DATA RECORD)

FILE NO.: 06-05

PROJECT NAME: Walker's Chrome

RUN NO.: W-14

SUMMARY OF TEST DATA

---------------------

Volume of Gas Sampled (Vm): 230.59 cubic feet

Vm Meter Cal. Factor (Y) 0.973

Meter Temperature (Tm): 520 deg. R

Barometric Pressure (Pb): 29.42 inches Hg

Avg. delta H Orifice Press. (dH avg): 2.708 inches H2O

Pb + dH avg: 29.62 inches Hg.

O2 in Stack (%O2): 20.90 percent

CO in Stack (%CO): 0.0000 percent

CO2 in Stack (%CO2): 0.00 percent

N2 in Stack (%N2): 79.10 percent

Pitot Tube Factor (Cp) 0.84

Avg. of Sqrt. of Pitot Press. (/dP avg): 0.37 /(inches H2O)

Stack Temperature (Ts) 532 deg. R

Static Pressure -0.24 inches H2O

Absolute Stack Pressure (Ps) 29.40 inches Hg

Stack Dimensions 12 inches dia.

Stack Area (As) 0.785 square feet

H2O in Impingers and Silica Gel (Vlc): 26.6 milliliters

Sampling Time (t): 240 minutes

Nozzle Diameter (Dn): 0.375 inches

Total Chromium Mass Collected (Mn): 1,010 nanograms

Hexavalent Cr. Mass Collected (Mn): 317 nanograms

CALCULATED RESULTS

-------------------

Corrected Sample Volume (Vm std): 225.53 DSCF (68 deg.F)

Water Vapor in Stack (Bws): 0.6 percent by volume

Stack Gas Molecular Wt, Dry (Md): 28.84 lb/lbmole

Stack Gas Molecular Wt, Wet 28.78 lb/lbmole

Stack Gas Velocity (Vs): 20.92 feet/second

Stack Gas Flow Rate (Qs): 956 DSCFM(68 deg.F)

Isokinetic Ratio (%I): 100.7 percent

Total Cr Mass Conc. (Cs): 4.4784383 nanograms/dscf

Hex. Cr. Mass Conc. (Cs): 1.4056089 nanograms/dscf

Total Cr Mass Conc: 158 nanograms/dscm

Hex. Cr. Mass Conc: 50 nanograms/dscm

Total Cr. Emission Rate (Wm): 0.26 milligrams/hr Total Cr.

Hex. Cr. Emission Rate (Wm): 0.08 milligrams/hr Hex. Cr.

Run W-14 was run similar to W-12 and W-13 but without any plating in the tank during

Run W-14. Amp-hours and amp-hours/hour were zero and bath temperature was 104oF.
Appendix B

Laboratory Results
(This page is blank.)
B-1

Chromium Source Testing Results

Project: Walker's Custom Chrome

Sample Collection: February 2006

Probes and Impingers

ml of sample Total Cr Total Cr Cr(VI) Cr(VI) Cr (VI) as

Sample ID collected ng/ml ng recovered ng/ml ng recovered % of Total Cr

W11-P 82.7 13.0 1100 8.2 680 61.8%

W11-I1 104.6 5.7 600 5.3 550 91.7%

W11-I2 105.7 <1.0 <110 0.3 32

Totals: 1,700 1,262 74.2%

W12-P 78.6 54.0 4300 33.0 2600 60.5%

W12-I1 93.2 7.3 680 6.3 590 86.8%

W12-I2 103.8 1.1 110 0.4 42 38.2%

Totals: 5,090 3,232 63.5%

W13-P 103.0 28.0 2900 18.0 1900 65.5%

W13-I1 106.1 15.0 1600 15.0 1600 100.0%

W13-I2 105.1 1.7 180 1.0 110 61.1%

Totals: 4,680 3,610 77.1%

W14-P 73.8 8.7 640 2.7 200 31.3%

W14-I1 93.8 2.5 230 0.7 66 28.7%

W14-I2 101.3 1.4 140 0.5 51 36.4%

Totals: 1,010 317 31.4%

The limit of detection (LOD) for Cr by GFAA is 1.0 ng/ml. The LOD for Cr 6+ by IC is 0.2 ng/ml.
B-2

Chromium Source Testing Results

Project: Walkers Chrome

Date ml of sample Total Cr Total Cr Cr(VI) Cr(VI)

Analyzed Sample ID collected ng/ml

ng

recovered ng/ml ng recovered

3/28/2006 W11-I1 104.6 5.7 600 5.3 550

3/28/2006 W11-I2 105.7 <1.0 <110 0.3 32

3/28/2006 W11-Probe 82.7 13 1100 8.2 680

3/28/2006 W12-I1 93.2 7.3 680 6.3 590

3/28/2006 W12-I2 103.8 1.1 110 0.4 42

3/28/2006 W12-Probe 78.6 54 4300 33 2600

3/28/2006 W12-Probe 78.6 54 4300 34 2600

3/28/2006 W13-I1 106.1 15 1600 15 1600

3/28/2006 W13-I2 105.2 1.7 180 1 110

3/28/2006 W13-Probe 103 28 2900 18 1900

3/28/2006 W14-I1 93.8 2.5 230 0.7 66

3/28/2006 W14-I2 101.3 1.4 140 0.5 51

3/28/2006 W14-Probe 73.8 8.7 640 2.7 200
B-3

Subject: Walker Chrome plating bath analysis by Anachem

Date: Tue, 16 May 2006 08:25:37 -0700

From: Robert Barrera <rbarrera@arb.ca.gov>

To: David Todd <dtodd@arb.ca.gov>, Carla Takemoto <ctakemot@arb.ca.gov>

The analysis on the chromium plating bath sample from Walker's has been

completed except for the Hull Cell test. The results are as follows:

Date: May 11, 2006

Lab#: B16229

SA# 054005

 Chromic Acid 34.8 oz/gal

Sulfate 0.40 oz/gal

 Ratio 87/1

 Trivalent Chromium0.5%

 Surface Tension 28.9 dynes/cm

 Baume 24.4

 Chloride <25 mg/L

 Iron 0.91 g/L

 Copper 2.08 g/L

 Zinc 0.51 g/L

The Hull Cell result will be in this week.

 Robert Barrera <rbarrera@arb.ca.gov>

 Air Resources Engineer

 California Air Resources Board

 Stationary Source Division
(This page is blank.)
c,.,

Appendix C

Field Data Sheets

.

010

~ ~~.~~c "' ~- ~"""~-- ,...""~, cC
O 

t No ~~o -oC"- T -

§: ~ 1-- >-' ::::.

-w _\ '7'""" -W.:J "1 > a:

!,:: w :=.-.;.O)a:t-'~~>Q

~L.L:r:CJ)- --

,\- A !l- ~ -~ , > > ,.-- " :";'.C/) 0 N ,.. > > -

~ z2:t-'2:(J)w

=~ S) !l- 6 W ~!l- ct) 2: 0 8 :?: 2:

~ \ .;r w(J)a:OOCOO

o.J ~ u Z ~ I-zt-'I-~c-WW~WLJ.J a: "C;;2:z2:2:~ ...

\~LJ.Jf-..W '-'--

V ~JZffiw .f-..~:J:J=>:J

o~t-'CI:.;r~(J)(J)CJ)w

\ CI:~~w~f-..C/)C/)C/)CJ)U)

~-L~~~2:C[)'!?-~~~~~ -

-, ~~- ..

~ ~ . ~-~~a.. "- "

\ c.

I ~I c~

-'+- 1" ~ p

'~ -.,

0 "::f'..' ~ ':;;

CI: ~ t-' ":

0 ..u (

u ~ ~ .

.w

.-CI:

ft.", ~ .

"A

ijo

--'"

., ~

u- ~wI

!:!:! at-'

~ I-w

0 01I;

iJJ ':( " 

u- 2:'t-'

...

ro-Z >- --

~ Q w t-' .0

r""'uJ~ -N -

~ u ~-

t-'. N w 0 -a I -j'

CD ON .~ ..L~

, 0 Cw c: -

!::Oa: > :=- ""

~Z!l- ~

'~

..-

--

C

~

Q

>

E

~ -

u w ..

02; ~

~j:::; aI

urf-....c

I

!: \i

I i

iI:. .--: : -" ,;---,..' --i- I

J r- oQ)-"",,;\-, r--eQ~-=.~~~~~~~~~ ::\:.., ~

011 '\~ r

~~-,:z ...

-"';' ,...

c.~. ~---
~

o~ --

--

-<"'1- ~~ :r: 0

-, w .-,

.:-cr: f"">-

:J -w

W .--w o>cr:

!:!;:; -.-' OJ 0: I- ~ 0' > 0

C- .UJ ~ '- cn 0 NO> > .

~ Ll.I:Jcn « 0--:, -N»

~2:~~cn~2:0U~2: <{ w cn 0:. 0 0 0 0 0

a- Q..; « ..::: CD ~ « « «.« « cr:-J~~«l-cncncncnU)

0« I-cr:«wcncncncn

-'ZiXiW.I-!:>:J:J:J:J

~1-~cr:~~~2222

I-ZI-I-Wa.WUJI:UWUJ

~

!

I.

' ~ cr: .a w

I. ~

: J «:

.j-' .'. ,J

} cn.c c --<-

I w:-'-I-~ 0

'M I- J U) W

.'" CI! ~ LU ~ cr:

0 a: '-..\'-. « ~ I- '\):) Ci5

f- LU ' w,~ W

0 I- '-J «\I'") =\..

()

cc a Z I\.e:: CDlI:- >- -

UJ ~ ~ ~ « w w. .

u.~I-::J -'" -J

<1: LU.I ;t. z~ LU'

:J LU ~ :Jo I- 0

I-LU-J ~LUUJ 1-Ll. -N -J w ~-J W u,... I-" N \ \"i a.. 0: 0: L- CD. 0 ~ I

CD ~ O UJr;- "C

.0 NO 2' I- 0 -J-

!:::Oa: «1tu.1-' ~ .§ c,Q

Q..;ZO- cnCC«O: > . tU .

,

~

,a- 0: ~

.0 UJ C'{

0 1-' I- ..

Z' U). UJ ~

W -' ..2: a)

z lJ:X2:1I: « ...C- O O I-

'0 CDi=" 0 0- I- I- I zl- «cr:-JU) ~ «UJa:LU<1: u I- I

Z U I- LU I- U « z I

,i =>o<1:c..Wo I-E@J6 I

) II:-JQP~-J.'- U)::Ioo;J: a.. ; 012 -,., ~ In r-. ~ ~ ~ ~ - -...~ r-- -0 ~ ~ -

..,.'" "'0\" Ot

III

.<:

~~. ~.,.~ c ,oj
N~

00

-~-;. ~ ~

=-a: 1->-

~W a: -~ W.::> ~ 0 > C/)

w ~---OJa:I-~~>O UJ

CJ u.I~C/)- --a:.

\ ,~ .W ~ ~:'-"~ "6 3 (j::S: ::s: ."j::

-J.4- O~W C/)W~ U~~ ~

<J<j Z~f-~C/)a:OOOOO' a:

f-Zf-f-W!l-WWWWW i3::

JI uL-z a: £=U2~~~2 " ~

~ ~ Wr-W '""-- ..:::: ~ -"OJz-w .j-~~~~::> W

-~ OIDf-a:<!WUJUJC/)CI) ff." 0- Coo ~2: CD cn- ~ ~ <;t: ~ <;t:

...1'0 a:5~w~j-U)U)(/)C/)C/)

Jj .J

of ;=:..

~:) ~ , .,{ ~

I c"'"' "

-'+- ~ 

<;t:

U

j-

~

;;:{

'i

" r-

"'" ,:

~ -,t.

~ ..1

V:>

~'

~

~

~

"""

' ,.

...""

~

~':"-..

~-¥

--" " -

~~

II') ~

~ '" ~

1~

Vi :\"

~ 

3,rJ

1 ~

~ ..

~ ,.J

-' ~

!l-

.0

xw~

Z' U).

0 Iz .rr.o~a:

-0 °mi=-;:(

zf- ~a:-Ico

0- j- f-

<;t:Wa:w<;t:

ZuJ--wl-u

, ~O~O-Wo

,.:: a:-lQP~-I.. -.: I

j r..;~~~~~

,
.~

No ~-:;

O~ -

--

-0 0"-

:-a: I--

-' UJ .-~

::I:

-w>

<9 --,-C]cr:.-~o>a 

UJ Li::" -w,:J -~ > a: CJ') w

« a..~~::)~ a::

C- .UJ ~ .:- U) 0 NON ~ -~ .::)

0 a.. (1)~0 .-

Z::2::~~CJ)WL. U~2«

« UJCJ)a:aoooo' a:

'-ZI--I--WO-UJUJI:LJUJUJ W

- \ u z (I:~ C-

-cf Q,. UJ'- UJ a:: c- ~ ..::: ::2:: ~ ~ ~ " ~

,.., .Z m I--UJ .'- z:J :J :J ::J :J UJ

"" 0« (I: «(/)(1)U)CJ)U) .-

II a:: -J ~ W « .-U) U) U) CJ) U)

~

\ -C-C-«2£D~«««««

~ ~

!t I ~ 

«

-J

.:J

I--

0 

a:: .-0

-c:

LL .

_I

UN . LUO

"tJ- «

I U0

UJ

U)

(I: W

«a:-:

CJ)

> ==

UJ c:

-J .

0-0

U c-.~

I- 0

>- -

," W +-'. '-'.-'+- ~

0 - (I:~U

>-w;j

0- a:: ~

.' 0 W U UJ

0 I- "- O~.

Z' U). W -J -: W j:: ". ~ U J-o

.Z ~3~a:: ~ .

Zf- «(I:-.J'" ~

OQ I--£DI-~ 0

«UJ(I:W« U

Z U I- UJ I-- U « :JO«C-WO f-E@J

O:-3Q.o~-.J -(J))-"::J: I

014'

. iDi.t