environmental resources management incenvironmental resources management inc 999 west chester pike...

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APPLICATION FOR PERMIT1

Discharge of Volatile Organics to Ait from a

Pilot Soil Decontamination Program

Submitted by:? Allied-Bendix Flight Systemsr i South Montrose, Pennsylvania

1 Prepared by:Environmental Resources Management, Inc.

999 West Chester Pike_ • West Chester, Pennsylvania

•* Date: June 11, 1985

I flB300573^^ •

EnvironmentalResourcesManagement Inc999 west Chester Pike • West Chester. Pennsylvania 19382 a (215) 696-9110

June 11, 1985

Ms. Celeste MillerAllied Bendix Flight SystemsRoute 29South Montrose, PA 18843

Dear Celeste:

Enclosed are four copies of the completed DER air quality permitapplications for the pilot program for the on-site soil purging atyour facility. As is typical with DER procedures, I expect that they willprobably send a review letter with at least some changes and/or addi-tional requests. Once this application is considered administratively vcomplete by the DER, it should require minimal additional effort to prepareany additional applications for future purging activities. \**/

I trust that this will get us on our way to an autumn 1985 pilot programfor the soil purging. If you have any questions or comments, please giveme a call.

Very truly yours,

Marilyn^. Hewitt, P.G.Project Manager

MAH:jmaEnclosurescc: Joseph Lewandoski

An affiliate of tne Environmental Resources Management Croup with offices InAnnaooiis. MO • aioomington, MN • Boston. MA • Brentwood. TN • Charleston, wv • Columbus. OH • East lansujg. Ml

Jackson. MS • Kansas city. MO • Marietta. CA • Mciean. VA • Palatine. H • Plamview. NY • Tampa. Fl • Walnut Greet CA • V>

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ER-AQ-1S: REV. 3/79 Page * of 13COMMONWEALTH OF PENNSYLVANIA ——

DEPARTMENT OF ENVIRONMENTAL RESOURCESBUREAU OF AIR QUALITY CONTROL

Application for Plan Approval to Construct.Modify or Reactivate an Air Contamination Source

and/or Air Cleaning Device and for a Permit to Operate

Read the instruction carefully before completing this form. Submit duplicate copies.

Section A Identity and Location of Air Contamination Source 1 A. Application is being made for:

(El Construction of New Source/Operating Permit

LJ Reactivation of a Source/Operating Permit

LJ Modification of Existing Source/Operating Permit

LJ Installation of Air Cleaning Device/Operating Permit

Q Amendment to a Previous ApplicationPrevious Anplication No.

IB. Type of source

Air Stripper for Volatile Organics in soil

1C. Plant in which source is located

CD NEW Lj3 EXISTING

OFFICIAL USE ONLY

Application No.Plant Code Unit IODate ReceivedReviewed by

Potential Emissions (TPY)

PM SO, VOCNOX . CO Other

Actual Emissions (TPY)

PM S02 VOCNOX CO Other

Change in Actual Emissions (•«• or -1

PM S03 VOCNOX CO Other

1O. If source is new, docs it replace another source 1 1 YES GD NO '^- Expected date of completion/ (describe sou-<e replaced)' . 12—31—86

2A. Owner of source

Allied Bendix Flight Systems26. Employer 1.0. No. (Federal IRS No.)

3A. Owners designation of source and/or plant if any 36. Location of source Political Subdivision County(Street address or Route No.) (Township, etc.)

South Montrose Plant Route 29 South Montrose Susquehanna3C. Mailing address (Street or P.O. Box, City. Zip Code) 3D. Telephone No.

Route 29 South Montrose Pennsylvania 18843 717-278-87084A. Person to contact regarding this 46. Mailing address (Street of P.O. Box, City, State, Zip Code) AC. Telephone No.

Application (name and title)Celeste Miller Route 29 South Hontri.se PA 18843 717-278-8708

5. Official signing application must be an agent of the Company having primary responsibilities for operation of the facility to which this applicationapplies. Although he may not have participated in the design of the facility he should be responsible for approval of the design.

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1 . beingII.IVHHJ primary responsibility for the design and operation of thincluded in the foregoing application is true to the best of

G.-.orn to and subscribed before me thisday of

DAVIT

duly sworn according to law depose and say that 1 am the officiale facilities to which this application applies and that the informationmy knowledge, information and belief.

Signature

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Ert-AQ-16: 1/79 I Page_3_of 13

Section B — Source Information Continued* " *. i

€. Describe fully the facilities provided to monitor and record all operating conditions that may affect tha emission of air contaminants.Provide detailed information to show that tha facilities provided are adequate.

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See Attachment A

7. Describe modifications to process equipment in detail.

N.A.

i

i

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6. Type and method of disposal of all waste materials generated by this process

N.A.

Is • Solid Waste Disposal Permit Needed? O Yes D No

9. Briefly describe the method of handling the waste water from this process and its associated air pollution control equipment

N.A.

Is • Water Quality Management Permit needed? O Yes D No

10. Describe the economic or social benefits to be derived from the construction described in this application. This requirement applies onlyto new or modified sources which will increase actual emission rates of any regulated air contaminant in excess of 50 tons per year.

__Will allow abatement of on-going source of contamination to regional potableaquifer, without attendant hazards of transporting and disposing of the contaminated

_soil off-site. Will reduce mitiyation costs one order of magnitude below secure~disposal alternative.______________________________________________

11_ Attach any and all additional information necessary to adequately describe the process equipment and to perform t thorough evaluationof the extent and nature of its emissions.

See Attachments A and B*

T 4] . Pago_ of

«• Section C — Control Equipment

1. POTENTIAL PROCESS EMISSIONS (OUTLET FROM PROCESS. BEFORE ANY CONTROL EQUIPMENT)

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3

33

A.

B.

C

D.

Outlet paniculate loading (Ibs/hr or gr/SCF Dry)

N.A.

Specific gravity of paniculate (not bulk density)N.A.

Attach outlet particle sizt distribution informationN.A.

^

4

Specify gaseous contaminants and concentration

Conttmintnt Concentration VOC Contaminant* Conctntrition

(1) SOx ppm (Vol.) Ibs/hr (4) Benzene 2-0 ppm (Vol.) Ibs/hr

121 N0" ppm (Vol.) Ibs/hr (51 Toluene 700 ppni (VoU tbtltH

» c0 ppm (vol.) ibs/hr ,6,Trichloruethene 580 ppni,VdU ,te/hrPerchloruethylene 480

2. GAS CONDITIONER (IF APPLICABLE)N.A.

A.

a.

cD.

Water quenching D Yes D No

Water injection rate GPM

Radiation and convection cooling D Yes D No .

Air dilution D Yes D NoCFM

Gas conditioner outlet

ACFM 9 *F•

'x-X

3. SETTLING CHAMBERS (IF APPLICABLE)-

N.A.A.

B.

D.

F.

H.

•

K.

Manufacturer

Volume of gas handledACFM 9 *F

Length of expansion chamber (ft)

Height of expansion chamber (ft)

Inlet concentration 1. Outlet concentration(Ifat/hr or gr/SCF Dry) Dbs/hr or gr/SCF On

Water injection L. Water injection rate

O Yes D No

•

C. Gas velocity

E. Width of expansion chamber (ft)

G. Number of trayi

J. Overall efficiency (XI*)

(GPM) • M. Attach particle sueEfficiency curve

\

3. . (1R300578

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Page 5 of 13

Section C - Control Equipment, Continued

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4. INERTIAL AND CYCLONE COLLECTORS (IF APPLICABLE)N.A.

A. Manufacturer

D. Pressure Drop (water gage)

G. Design inlet volume (ACFM)

H. Inlet concentration(Ibs/hr or gr/SCF Dry)

B. Type

E. Inlet Gas Volume (ACFM)

1. Outlet concentration(Ibs/hr or gr/SCF Dry)

t

C. Model Number

F. Inlet Gas Temperature I F)

*

J. Overall efficiency (%J

K. Attach panicle size efficiency curve L. Number of individual cyclone (s)

M. Inlet diameter (ft) or duct area (ft2) of cyclone(s) N. Outlet diameter (ft) or duct area (ft2) of cyclone (s)

O. Length of cyclone (s) cylinder (ft) P. Length of cyclone (s) cone (ft)

Q. Diameter of cyclone (s) cylinder R. Outlet straightening vanes used?D Yes a No

5. CATALYTIC AND THERMAL AFTERBURNERS (IF APPLICABLE)N.A.

A. Manufacturer

D. Minimum temperaturemaintained ( F)

B. Type

E. Retention time at thistemperature (sec)

C Model No.

F. Volume of gases Bhandled (ACFM €> F)

G. Design inlet volume (ACFM) H. No. and capacity (BTU/hr) of burners

1. Catalyst used J- Expected temperature rise across catalyst

_K. Are temperature sensing devices being provided to measure the temperature rise across the catalyst? O Yes D No

L. Is a heat exchanger system used for heat recovery? Q Yes D No

M. Inlet concentration

ppm. (Vol.)

N. Outlet concentration

ppm (Vol.)

a Overall efficiency (X)

P. Attach dimensioned diagram of afterburner and stack

Cl Describe any temperature sensing and/or recording devices (including specific location of temperature probe).

/JR300579

of

Section C - Control Equipment, ContinuedS. FABRIC COLLECTORS (IF APPLICABLE)

N.A.A. Manufacturer

C. Air to cloth ratio (actual conditions)

E. Fabric Permeability (clean) 9 1/2" w.g. A P

CFM/ sq. ft.F. Pressure drop across collector (in. wg.) G. Volume of gases

B. Model No. U Pressurized designD Suction design *-*

O. Type of Fabric

Material D FeltedWeight os/sq yd D WovenThickness in O Felted-Woven

handled (ACFM) . H. Inlet gas temperature ('F)

1. Design inlet volume (ACFM)

J. Inlet concentration • K. Outlet conoantnllbs/hr or gr/SCF Dry) (Ibs/hr or gr/SC

M. No.

0. Can

P. Bag

of compartments N. No. of bags per

ition L. Overall efficiency (X)FDry) ,

compartment

each compartment be isolated for repairs and/or bag replacement?

dimensionsDiameter (or width if envelooe tvo* baa) —————— • ——————————

Q. If multiple walled bags provide detail

R. Method of bag cleaningD Shaker O Reverse jet (blow ring)D Reverse companrnental pulse D Reverse flowO Reverse bag pulse O Other ^~"

S. Oeaning initiated by Frequency if timer actuatedD Timer

O Pressure drop psig

T. Shaker cleaningO Mechanical D One compartment shaken at a timeD Manual D All compartments shaken at once

U. Reverse flow cleaning air supplySource

CFM

V. OthersFlushing pressure (psig)

W. Are temperature controls provided? (Describe in detail)

X. Is baghouse insulated

o. :.

Y. Maximum temcjeratura bagscan withstand ( Fl

Z. Dew point at maximumMoisture ( F)

flR30Q580

Page_T_ of-I ra9«_2_ ot n

Section C — Control Equipment, Continued

3

3

7. PAHTICULATE MATTER SCRUBBERS (IF APPLICABLE)N.A.

A. Manufacturer/

B. Type C. Model No.

D. Pressure drop (water gage) across scrubber only. Do not include duct or demister losses

J E. Gas temperatures ( Ft

at inlet _____ ____ outlet

3331

F. Volume of gases handled atinlet temperature (ACFM)

H. Water flow rate (GPM)

J. Inlet concentration(tbs/hr or gr/SCF Dry)

G.' Design inlet volume (ACFM)

1. Relative paniculate/gas velocity(ejector scrubbers)

K. Outlet concentration(Ibs/hr or gr/SCF Dry)

L. Overall efficiency (%)

M. Attach particle size efficiency curve

1

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N. Describe equipment provided to measure pressure drop and water flow rate to scrubber

O. Describe scrubber water supply system (amount of make-up and recirculating water, capacity of recirculating water system, etc.)

P. Describe mist eliminator or separator (configuration, backflush capability, frequency)

ii

Q. pH monitoring and adjustment? Describe if yesO Yes D No

Section C — Control Equipment Continued

)

B. ELECTROSTATIC PRECIPITATOR (IF APPLICABLE)

N.A.A. Manufacturer B. Model No.

D. Pressure drop (water gage)

Across collector only

F. Maximum operating tamp. ( F)Actual operating temp: ( F)

.H. Dust resistivity (ohm/cm)

J. lout collecting surface area sq. ft.Collector plates size length ft x widthNo. of fields no. of collector plates/fieldSpacing between collector plates inchesMaximum gas velocity ft/secMinimum gas treatment time sec

K. Total discharge electrode length ftNumber of discharge electrodes

C. D Wet D Dry ^_>D Singls-Stage C Multi-Stage

E. Design inlet volume (ACFM)Actual volume handled (ACFMI «.

G. Maximum Dust Inlet Cone. (gr/DSCF)Maximum Dust Outlet Cone. (gr/DSCF)

1. Gas Distribution Grids

O Yes D No

ft

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L. Number And Size of Transformer Rectifier Sets By Electrical FieldNo. of Each Transformer Each Rectifier

Field No. Sets KVA KVAve/Peak Ma DC

M. Current density

Micro emoeres/ft.f. Number collecting electrode rappers

N. Corona power

Watts/1000 ACFM

Minimum acceleration rating for rappers a's

O. Corona power density

Watts/ft2

U. Flue gas conditioning equipment used? O Yes U NoO. scribe (If Yes)

\^

1Section C — Control Equipment

3- 9. ADSORPTION EQUIPMENT N.A.

, A. Manufacturer

KB. Type C. Model No.

D. Volume of gases handled ACFM

JF. Design inlet volume (ACFM)

H. Carbon charge per adsorber vessel end number of adsorber vessels

"J

E. Inlet temperature I F)

4

G. Percent concentration of solvent in exhaust gases

1. Adsorbent type, density and property

J. Vapor pressure of solvents at the inlet temperature

3K. Length of MTZ (supplied by the manufacturer based upon laboratory data)

J ________________________L. Percent relative saturation of each solvent at the inlet temperature

1 _______________________M. Breakthrough capacity [~ Ibs of solvent ~~J

*r 100 Ibs of adsorbent

*-v_N .Working capacity of adsorbent (X) O. Heel percent or unrecoverable solvent weight X in the adsorbent after regenerate

P. Adsorber diameter (ft) and area (ft2)

1Q. Adsorption bed depth (ft)

1

\

\

\

R. Available steam in pounds to regenerate carbon adsorber

S. Adsorption time per adsorption bed

T. Inlet concentrationItn/hr

U. Outlet concentrationIbs/hr

V. Overall efficiency (X)

«. Please supply any additional data to thoroughly evaluate the control equipment.

A

I - . flR'300583

~] P«g«10_of_13_

-| Section C — Control Equipment, Continued

33

l ABSORPTION EQUIPMENT (IF APPLICABLE)

N.A.A. Manufacturer

D. Volume of gases handled IACFM)

B. Type

E. Design inlet volume (ACFM)

G. ConfigurationD Countercurrent D Cross flow D Cocurrent flow

C.

F.

H.

Model No. S"

Inlet temperature ( F)4

Pressure drop (water gage)

1. Absorbent type and concentration J. Retention time (sec)

K. Inlet concentration L. Outlet concentration M.Overall efficiency (X)

N. Describe pH and/or other monitoring and controls

1

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O. Type packing and size (It applicable) P. Height of packing Ift) Q. No. of trays R. Diameter of tower (ft)

5. Attach equilibrium data for absorption (If applicable)

11. OTHER CONTROL EQUIPMENT (IF APPLICABLE)N.A.

A. M.iiiutjciurur

O. Volume of gases handled (ACFM)

G. Inlet concentration(Ibs/hr or gr/SCF Dry)

B. Type

E. Design inlet volume IACFM)

H. Outlet concentration(Ibs/hr or gr/SCF Dry)

C. Model No. j

F. Inlet temperature ( F)

1. Overall efficiency (X)

J. Attach particle size efficiency curve or other efficiency information

K. Describe fully giving important parameters and method of operation

J

J P«ot 11 of 13

Section C - Control Equipment, Continued

"\

\\. COSTSN.A.

A. Cost ol all control equipment including installation costs (List individual controls separately)

6. Estimated annual operating costs of control equipment only

12. Describe modifications to control equipment in detail

N.A.

3

13. Describe in detail the method of dust removal from the air cleaning device and methods of controlling fugitive emissions from dust removal.handling and disposal. ,

N.A.

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14. Does air cleaning device employ hopper heaters, hopper vibrators or hopper level detectors? If so describe.

N.A.

IS. Attach manufacturer's performance guarantees and/or warrantees for each of the major components of the control system (or completesystem).

N.A.

16. Attach the maintenance schedule for the control equipment and any part of the process equipment that if in disrepair would increase the aircontam*nant emissions. Periodic maintenance reports are to be submitted to the Department.

N.A.

17. Attach any and all additional information necessary to thoroughly evaluate the control equipment.

N.A.

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Section D - Flue And Air Contaminant Emission Information

N.A.A. Exhauster static pressure in w.g. HP 9 RPM

B. Stack height above grade (ft)

Grade elevation (ft)

C. Stack diameter (ft) or outlet duct area (sq ft)>

D. Weather cap

O Yes a No

fc. Indicate on an anached sheet the location of sampling ports with respect to exhaust tans, breeching, etc. Givewl necessary dimensions.

F. Can the control equipment be bypassed? (If Yes. explain) O Yes O No

2. ATMOSPHERIC EMISSIONS_____N.A._____________________________________________________________________ J

A. Paniculate matter emissions (ibs/hr or gr/SCF Dry) v>«- '

]9. Gaseous contaminant emissions

Contaminant* Concentration VOC Contaminant* ' Concentration

111 so« _______ppm (Vol.) ___ibs/hr (4) Benzene 220 ftf)m Wot^___lbl/hr

I (2) NOx _________ppm (Vol.) ____Ibs/hr (5) Toluene 70° ppm (Vol.) ____Ibs/hr

(3) CO _______ppm ivoi.) ___ibs/hr (6)Tr ichlouethene 580I _ perchlouethylene 480

1| C. Outlet volume of exhaust gases

CFM

X Moisture

3JJ

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Page13 of 13

Section E — Miscellaneous Information

1. Describe fully facilities to monitor and record the emission of air contaminants. Provide detailed information to snow that the facilities providedare adequate. Include cost and maintenance information. Periodic maintenance reports are to be submitted to the Department.

D Opacity monitorO SOx monitorCS OtherIf checked provide manufacturer name, model no. and peninent technical specifications

See Attachment A

2. Attach Air Pollution Episode Strategy (if applicable)Should the OVA meter detect any compounds included in DER Guidelines at concentrationsover the guideline level at the plant property boundary, an air sample will be collectedin a teflon bag, soil purging will be halted, and resumed only with OER authorization

3. Briefly describe the general nature of the area in which the source is (coated.

The area is rural, characterized by rolling topography. About h mile to the west isthe small village of South Montrose. To the north and east are open land with no nearbyresidences. To the southeast are three residences, the closest being about 700 feet frothe excavation and purging area. The closest property boundary to the excavation andpurging areas are approximately 400 feet and 375 feet, respectively to the north andsouth.

4. Attach calculations and any additional information necessary to thoroughly evaluate compliance with all the applicable requirements of Article IIIof the Rules and Regulations of the Department ol Environmental Resources and those requirements promulgated by the Administrator of theUnited States Environmental Protection Agency pursuant to the provisions of the Clean Air Act.

See Attachments A and B

5. List all attachments made to this Application.

Attachment A - Pilot Soil Purging and Monitoring Program

Attachment B - Air Quality Modeling' and Results

4R300587'

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ATTACHMENT A

Pilot Soil Purging and Monitoring ProgramBackground

This application is submitted in support of proposed remedialactions to abate the contamination of groundwater by volatileorganics at the Allied Bendix South Montrose facility. ERH'shydrogeologic investigation and remedial action reports ofFebruary 1985 describe the details of the site, the extent ofcontamination, and the proposed remedial actions.

In meetings with the Pennsylvania DER, it has been determinedthat air quality permits will be required for some of theproposed remedial actions at the site. Three activities havebeen proposed by ERM which will require air permits:

• Air stripping of volatile organics from excavated soils• Air stripping of volatile organics from in-situ soils• Air stripping of volatile organics from recovered

groundwater jThe first two items, entailing the removal of volatile organ-ics from soils, are innovative technologies which are ex-pected to result in the elimination of significant ongoingsources of volatile organic contamination to the groundwatersystem. Such remediation is critical to effective ground-water quality restoration. ERM has proposed to conduct thesetwo actions in phases, each being tested for effectivenesswith a pilot program, after which a full-scale program willbe conducted if the pilot-scale program is successful. Thispermit application is submitted for fchp pilot program for ^jr"stripping of excavated soils. The soils will be excavatedand placed in winUroWU, opfHrO-xlmately 30 ft x 5 ft x 5 ft,and aerated from below at a rate of approximately 200 scfro.

Both the excavation and the aeration will result in releaseof volatile organics to the air. Field studies haveindicated that in-soil concentrations of total volatileorganics of z.ooo ppm are n iy *ft ho roleas£.3,mo3t of thiscoming off during excavation. The aeration will oe perrormeaBy forcing compressed air tnrough perforated pipe air linesplaced beneath each soil windrow, as in an enhancedcomposting operation. Since much of the volatile organiccontent will be released during excavation, it is expectedthat the air stripping operation will emit something lessthan 2,000 ppm of total volatile organics.

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The ERM Group

Air Quality Modeling

Field studies have indicated that the volatile organics pre-sent in the soil are:

Toluene 35%Trichloroethylene 29%Perchloroethylene 24%Benzene 11%Other 1%

Applicable DER Recommended Ambient Air Quality Guidelinesare:

Benzene 24 ppbTrichlorethylene 1200 ppbPerchloroethylene 1200 ppb

These are the guideline maximum values for volatile organicsleaving the plant property. To demonstrate conditionsexpected during the pilot soil purging program, ERM engineershave simulated conditions for both the excavation and purgingoperations using the Industrial Source Complex Short-TermModel. Attachment B is a memo describing the modeling andresults. In summary, the plant boundary area was examined inthe model at 16 locations for total volatile organic andbenzene concentrations using actual meteorological andmixing-height data obtained from the closest availablestations. The results indicate that the worst case expectedcondition would be a total of 12.567 ppb total volatileorganics, with 1.38 ppb benzene at the property boundary 112meters distant from the emission source at an angle of 202.5from north. These values are well within the DER guidelines.

Air Quality Monitoring During Pilot Purging

Monitoring of the air emissions is proposed during this pilotpurging program. The program itself is expected to be amaximum of two weeks in duration. During that time, actualexcavation and purging will be conducted 5 days a week for amaximum of 10 hours per day. - Emissions from the excavationarea will be monitored hourly during times of operation usinga Foxboro flame ionization detector Century OVA meter. Emis-sions from the windrow being purged also will be monitored onan hourly basis. The presence of the major compounds beingemitted will be determined using the GC mode on the meter.Purging of each windrow is expected to continue untilequilibrium is reached in the air directly above the pile, oruntil OVA readings reach background, whichever occurs first.

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The ERM Group

During hours of operation, wind directions will be determinedusing an anemometer. Based on the wind direction, air qual-ity readings will be taken on an AID photo ionization detec-tor model 580 OVA meter at the downwind plant boundary everyhour during operation. This instrument will be used at theplant boundary due to its ability to quantify total volatileorganics in the ppb range. Should any volatile organics bedetected, the approximate concentration of each major com-pound will be 'calculated using the emission percentage asdetermined at the excavation and purging areas. Should anyof these property boundary concentrations exceed the DERguidelines, an air sample will be collected in a Teflon bagfor analysis for volatile organics. The purging operationwill be suspended pending analytical results, and will notresume until authorized by the DER.Following the completion of the pilot soil purging program, areport will be prepared detailing the air quality monitoringprogram and its results. Any recommendations for modifica-tions for monitoring of the Phase 2 soil purging programwill be made.

4R300590

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The ERM Group ATTACHMENT DAir Quality Modeling and Results

Date: May 21. 1985

To: Marilyn Hewitt

From: Phil Rosten

Re: Bendix Site Air Modeling

This memo reports the result of the air quality modeling that has beencompleted for the Bendix Aviation Products Site. The modeling was doneusing Industrial Source Complex Short Term (ISCST) model. This model iscapable of simulation of the air quality resulting using hourlymeteorological station surface and mixing height data. Simulations weremade for the months of August. September, and October for the two years(1977 and 1978) that surface data was available from the Wilkes-BarreScranton met station and mixing height was available from Albany. NY.Simulations made include 1-hr, 8-hr, 24-hr, and total simulation timeaverages at locations on the property line at ground level. Sixteenlocations were chosen at equal angle intervals. The program listed themaximum and second highest values for each receptor location for eachtime interval in addition to the highest 50 values for all receptorlocations for each time interval.

The attached definition sketch (Figure 1) shows the relative locationsof the property boundary, the emission source location, and the receptorsite locations.

EMISSION CHARACTERIZATION

The emissions were characterized as to separate sources: one from theloading or removal operations, and the other from the actual strippingoperations. The release rate for the removal operations was calculatedas releasing the pore space gas from 10 cu. yards of contaminated soilin a 15 minute period. From measurements, a VOC concentration for thepore space gas of 2000 ppm was used. For the purposes of thesimulations, it was assumed that the resulting emission rate wascontinuous during the daily operation. Operations were simulated forthe hours of 8:00 AM to 6:00 PM.

._i The emission from the strippingoperation was characterized as resultingfrom the flow of 200 scfm of air through soil dumped in a ridge

-. formation, 30 ft. long and 5 ft. high, with an average width of 5 ft. A. VOC concentration of 2000 ppm for the air exiting the pile was used.

The emission sources were simulated as area sources. The removalj operation was simulated as an 13 m area source at an elevation of 2

•* meters with an emission rate of 8.11X10"° gm/sec-m . The strippingoperation was simulated as a 13 m area source at an elevation of 1

"» meter with an emission rate of .0058 gm/sec-m . These mass rates were± calculated using the molecular weight of toluene as representitive of

the total VOC.

AR3Q059

1111

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The ERM Group

Of primary concern in the simulations is the resulting concentration ofbenzene at the property boundary compared to the guideline concentrationof 24 ppb as an annual average. From measurements, a mole fraction of11% benzene in the VOC was used to calculate the benzene concentrationsfroa the total VOC simulations.

METEOROLOGIC DATA

The mcteoroloiric data used, as stated abovn, was for the years, 1977 and1978. The surface data was obtained for the Scranton net station andused with the mixing height data for Albany, NY. Since it isanticipated that the operation will take place over a three month-period, during the fall of the year, simulations were Halted to thedays of the year from 214 to 304 for which data was not missing from thecontinuous record. Five wind speed catagorles (1.54, 3.09, 5.14. 8.23,and 10.8 m/sec max.) and atmospheric stability catagories A-F were usedto classify the met data. The program provided default values for thewind profile exponent values and vertical potential temperature gradientwere used.

RESULTS

Summaries of the results for the two years of simulations are presentedin Tables 1 and 2. The concentrations for both the total VOC andbenzene are presented. Also included in Attachments 1 and 2 are theISCST output files from which the tables are constructed. For the twoyears of simulation, the maximum 1-hr concentration simulated at theproperty boundary was 1.4 ppb compared to the 24 ppb annual average.This value was obtained at a location on the southside of the site atthe nearest distance from the source location; 112 meters at an angle of202.5 degrees from north. Due to variations in meteorologicalconditions, concentrations for the 1977 simulation were approximatelytwice the concentrations for 1978, but still. all simulatedconcentrations for all integrating times were well below the guidelinevalues for benzene.

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