GEPA

United States Environmental Protection Agency and Toxic Substances February 1988

Office of Pesticides €PA 56014-88-004k

Title 111 Section 313 Release Reporting Guidance

Estimating Chemical Releases Rom Paper and Paperboard Production

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Facilities engaged in paper and paper- board production may be required to report annually any releases to the environment of certain chemicals regulated under Section 313, Title III. of the Superfund Amendments and Rtauthorization Act (SARA) of 1986. If your facility is classified under SIC codes 20 through 39 (paper and paperboard facilities generally fall under SIC codes 262 1 and 2631) and has 10 or more full-time employ- ees, for calendar year 1987 you must report all environmental releases of any Section 3 13-listed chemical or chemical category manufactured or processed by your facility in an amount exceeding 75,000 pounds per year or otherwise used in an amount exceeding 1O.OOO pounds per year. For calendar years 1988 and 1989 (and beyond), the threshold reporting quantity for manufactured or processed chemicals drops to 50,OOO and 25.000 pounds per year. respecttvely.

This document has been developed to assist those engaged in paper and/or paper- board production in the completion of Part 111 (Chemical Specific Information) of the Taxic Chemtcal Release Inventory Fkporting Form. Included hereh is general information on tcvdc chemicals used and process wastes generated, along with several examples to demonstrate the types of data needed and various methodologies available for esti- mating releases. If your facility performs other operations in addition to paper or paperboard production, you must also include any releases of tordc chemicals from these operations.

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I Step One 1 Determine if your facility processes or uses any of the chemicals subject to I reporting under act ion 313. A suggested approach for determination

of the chemicals your facility uses that could be subject to reporting requirements is to make a detalled review of the chemicals and materials you have purchased. If you do not know the specific ingredients of a chemical formulation. consult your suppliers for thh Information. If they will not provide this infomation. you must follow the steps outlined to handle this eventuality in the in- structions provided with the TOXIC Chemical Release Inventory Reporting Form.

The list presented here Includes chemi- cals typically used in paper and paperboard production that are subject to reporting under Section 313. This list does not nec- essarily include all of the chemicals your facility uses that are subject to reporting. and it may include many chemicals that you do not use. You should also determine whether any of the listed chemicals are created during processing at your facility. Papennoking Mditiues

Sizing agents: Styrene-maleic anhydrlde copolymer (precursors). sulfuric acid. styrene-butadiene, acrylamide Wet- md dry-strength agents: Epichlorohydrin-based resin (precursors), melamine resin (precursors). urea- formaldehyde resin (precursors). formaldehyde

Adhesives: Acrylamide. ammonia Dyes and pigments: Acid Blue 9. Acid Green 3, Basic Red 1. Direct Blue 6. Direct Brown 95. Direct Black 38, Phthalocyanide Blue, potassium dichromate, lead compounds, benzidine. o-tolidine, cobaltic oxide, urea- formaldehyde resin (precursors) Bindem: Styrene-butadiene (precursors), polyvinyl acetate (precursors) Pigment fillers/coatings: Aluminum oxide, barium sulfate, styrene-butadiene polymer (precursors), titanium dioxide. zinc oxide. zinc sulfide, asbestos, phosphoric acid Humectants: Melamine-formaldehyde resin (precursors). urea-formaldehyde resin (precursors) Coatings: Ammonia. dibutyl phthalate, sodium hydroxide, potassium ferric cyanide. Oil-resistant additives: Fluorochemical chrome complex, ethylene glycol monobutyl ether (a glycol ether) Flame retardants: Ammonium sulfate, antimony trioxide

Machine Operating Aids Retention aids: Dicyano diamide, epichlorohydrin copolymer (precursors), asbestos Biocides and slime control agents: Acrolein. phenyl mercuric acetate, pentachlorophenol, ethylene glycol, 1,l. 1 -trichloroethane, trichlorophenol

Waste Paper PuZp Preparation Chemicals Delnking agent#: Sodium hydroxide and solvents Bleaching chemicals: Chlorine, chlorine dioxlde, zinc hydrosulfite, sodium hydroxide, sulfuric acid, methanol, chromic sulfate

Chemic& imported in waste paper: Ink pigments, coating agents, binders, adhesives Other chemicals commonly found in paper mill wastes: Chloroform, phenol, toluene Many of these chemicals are polymers,

which are not listed as toxic: however, their monomer precursors are. These polymers usually contain a small percentage of the unreacted or fi-ee monomer. For example, urea-formaldehyde resin used as wet- strength agent USU~UY contain$ less than 1.5 percent fi-ee formaldehyde. The toxic chemicals in the wastepaper your facility imports probably contain many of the Same chemical additives used in your process plus various inks and coatings.

Step Two Determine if your facility surpassed the

threshold quantities established for reporting of listed chemicals last year. . -

You must submit a separate Toxic Chemi- cal Release Inventory Reporting Form for each listed chemical that is 'manufactured." 'processed." or 'otherwfse used" at your facility in excess of the threshold quantities presented earlier. Manufacture includes materials produced as byproducts or impu- rities. Toxic compounds that are incorpo- rated into your products (for example, a papermaking additive) would be considered 'processed" because they become part of the marketed finished product. Degreasing solvents, cleaning agents. and other chemi- cals that do not become part of the finished product (for example, machie operating aids) would be considered 'otherwise used."

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The amount of a chemical processed or othemse used at your facility represents the amount purchased during the year, adjusted for beginning and ending inventories. To ascertain the amount of chemical in a mked formulation, multiply the amount of the mixture (in pounds) by the concentration of the chemical (weight percent) to obtain the amount of chemical processed.

Example: Determining whether 1 *I ,1- ttlchloroethane was used in -dent quantity last year to require reporting under Section 31 3.

A slime control agent used on a Fourdrtnfer paper machtne contam 7.2 percent I , 1.1 -trichloroethane. In 1987, a plant purchased 18,000 pounds of this agent, had 3.000 pounds in storage at the begtnning of the year, and had 6.000 pounds in storage at the end of the year. ?he quantity of 1,1,l-tlichlomthane used by Wfacurty e q d :

(3,000 Ib x 0.0721 (beginning fnuentoy) + (18,000 Ib x 0.072) (p~rchased) - (6,000 Zb x 0.072) (ending fnventq) = 1 , 0 8 O I b

The slime-control agent is crmsldered “otherwise used so the threshold re- porting quantfty is 10.000poUndsper year. Therefore. thts facUrty did not have to report emlssions of 1.1.1-trlchloroethane for 1987 (assuming thls was the only source of W chemical). A listed chemical may be a component of

several formulations you purchase, so you may need to ask your supplier for informa- tion on the concentration (percentage) of the chemical in each. For chemical categories, your reporting obligations are determined by the total amounts of all chemicals in the category. For metal compounds, base threshold determinations on the amount of metal compound. not the amount of parent metal.

You must complete a report for each chemical for which a threshold is exceeded. The thresholds apply separately; therefore, if you both process and use a chemical and either threshold is exceeded. you must report for both activities. If neither threshold is exceeded. no report is needed.

Step Three I I Mentiry points of release for the chemical(s) subject to reporting.

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An effective means of evaluating points of release for listed twdc chemicals is to draw a process flow diagram identifying the opera- tions performed at your facility. The figure shown on the next page is an example flow diagram for papumaking. Because each facility is unique. you are strongly urged to develop a flow diagram for your particular operations that details the input of materials and chemicals and the waste sources re- sulting f” the operation of each unit.

- m e primary sources of wastewater at papermaking facilities are as follows:

Excess white water from savealls, sealing pits. or other tank overflows Rejects from stockcleaning devices (centrifugal cleaners, screens. and

Deinking wastewater from centrifugal cleaners, washers, deckers, and thickeners Bleachlng wastewater generated during preparation of hypochlorite and chlorine diwcide and that coming f” various washers Felt- and wire-cleaning waters Cooling-water discharges Boiler blowdown and other misctllaneous discharges

junk traps)

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DEINKED WASTEPAPER WLP VIRGIN RKP r WASTEPAPER PULP

I Y I PROCESS I WATER I I 1 1 I

FILTERED WHITEWATER .

WHITE WATER TANK STORAGE

REFINERS

......... ...% ............. ......... ......

PROCESS

SAMAU POINTS STUFF FIBER

BOX

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CLEANER REJECTS

(SWDWASTE)

WHITE WATER

WATER TANK

p q j

.................................... i ! .................... *l.....i ~ .I , , -

............................ ............................. PRESS

SEGREGATE

DRYER

1 ............ 4

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FINWING

- MAJNPROCESS SECONDARY PROCESS PROCESS WASTE UP€

Erample Flow Diagram of Paper Manufacturing Process

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The primary sources of solid waste are as follows:

Fibers, ffflers, and broke from the paper machine Coating residue and broke from Wshing operations Cleaner and junker rejects from wastepaper processing Wastewater treatment sludge

Air emissions from papermaking facilities are generally fugitive and they usually occur in the followlng process anas:

Bleach plant Paperdryers Papermachine Coating and finishing machines Mixing vats Wastewater treatment volatflfiation

You must account for all releases in your reportirig.

I Step Four 1 I Estimate releases of toxic chemicals. I After all of the tordc chemicals and waste

sources have been identifled. you can esti- mate the releases of the individual chemicals. Section 313 requires that releases to air. water, and land and transfers to offsite facilities be reported for each toxic chemical meeting the threshold reporting values. The usual approach entails first estimating re- leases from waste sources at your facility (that is. wastewater, air release points, and solid waste) and then. based on the disposal method used. determfning whether releases from a particular waste source are to air, water, land, or an offsite disposal facility.

In general. there are four types of release

Direct measurement Mass balance

estimation techniques:

Engineering calculations Emission factors

Descriptions of these techniques are provided in the EPA general Section 313 guidance document. Estimating Releases and Waste- Treatment Efnciencies for the Toxic Chemical Release Inventory Form.

Provisions of the Clean Alr Act. Clean Water Act, Resource Consemtion and Recovery Act. and other regulations require monitorlng of certain waste streams. If available, data gathered for these purposes can be used to estimate releases. When only a small amount of direct measurement data is available. you must decide if another estimation technique would give a more accurate estimate. Mass balance techniques and engineering assumptions and calcula- tions can be used in a variety of situations to estimate taxic releases. These methods of estimation rely heavily on process operating

arc*v&y site-spec&. Emission factors are available for some industries in publications referenced in the general Section 313 guid- ance document. Also, anission factors for your particular facility can be developed in- house by performing detailed measurements of wastes at different production levels.

Direct measurements of waste streams (sources) for most of the h t e d toxic chemi- cals typically found at papermaking facilities are not made routinely. Also, emission factors are not generally available; however, you may have developed some factors for your own facility. M a s s balances can be performed if infoxmation is available on the quantity of chemical purchased and the quantity retained in the paper product. The difference between these two quantities

parameters; thus, the techniques developed \

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represents the quantity of chemical released. assuming none of the chemical is destroyed during processing or treatment. This does not provide information on the media into which the chemical is released, however. If this information is unknown. you will have to use engineering calculations or assumptions to complete the estimation.

The following subsections present infor- mation on the estimation of releases via wastewater, air emissions. and solid waste. The discussions focus primarily on mass balances and engineering estimates. m e following table presents generalbed assump- tions regarding the fate of chemicals in paper production. These general assumptions are based on their point of input in the process and their relative volatility. These assump- tions may prove helpful durlng emission estimation; however, you should approach each reported chemical indvidually. The fates of compounds considered semivolatile or reactive are more dimcult to follow, and the assumptions in this table may not be applicable.

To& Releases Via Wastewater ?Lpica.Uy. wastewater from all parts of a

papermaking facility are centrally collected and treated before they are discharged to a nearby body of water (direct discharge). a publicly owned treatment works (indirect discharge). or a land-application operation. Listed toxic compounds in the wastewater are considered released to water, transferred to an offsite facility, or released to land, de- pending on the method of discharge.

Your faciuty probably discharges waste- water under the authority of afi NPDES per- mit (direct discharge) or a local pretreatment permit (indirect discharge). These permits likely have discharge limits on zinc, penta- chlorophenol (PCP), and trlchlorophenol (TCP), and they may also have ltmits on other compounds. You can use the direct measure- ment data collected to monitor compliance with these permits to estimate releases of these chemicals. You also may use any other direct measurements of toxic compounds.

Chemical Fate Assumption8 in Papermaking

process Chemical input Relative

reporting status point volatility Probable fate in process

OtheIwise used Wet end Nonvolatile Wastewater, solid waste or imported Volatile Air emissions

Dry end Nonvolatile Solid waste Volatile Air emissions

Processed Wet end Nonvolatile Paper product, wastewater, solid waste Volatile Air emissions

Dry end Nonvolatile Paper product, solid waste Volatile Air emiSSions

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When direct measurement data are not available, an alternative method of estimation is needed. Mass balances can be made if sufficient information is available on the quantity of chemicals purchased and the quantity of chemicals retained in the product. An engineering assumption can then be used to determine what fraction of the waste chemical is released to wastewater, air. or solid waste.

This method of estimation lends itself well to those chemicals that are considered ‘otherwise used” (that is, they do not become part of the product), such as deinklng agents, bleaching chemicals, chemicals imported in the wastepaper, and slime-control agents. Because these chemicals do not become part of the paper product, the quantity as waste equals the amount used or imported (except for compounds that undergo chemical transformation during processing or waste treatment).

Example: Using a mass bdance and engineeving assumption to estimate releases of ethylene gZycoZ via wclsrewater.

12.200 pounds of ethylene glycol IEC) fn a biocide f?“ applied on the wet end of Its paper machine. To estimate releases of this c o n l m ff can be assumed that EGdoesnotbecomepartofthepaper product because Its mlscibffity fn water causes ff to be removed almost compktefy from thepaper web pressing functions. It canfiuther be assumed thatfueffiw a& emfssfiKls of EG are unlikely because of its low vdatuity ~wporpressure = 0.1 “ H g at law.

A_Aerfming andptessingfunc”

In 1987, a papennuking f d t y used

the forming and

are completed the whffe water in the system carries the EC through a sawad. A portfon of thefltered whtte water is discharged as wastewater, and the rest is recfrcutatedAssumingthntnoneis retained in the product OT emitted to air, on amass balance basis, d o f the EG will euentLLOUy end up in the wastewater. All

12,200 pounds of Ec was therefore contained fn tttisfaCaity’s wastewater.

water to a FOZW, a transfer of 12,200 pounds of EC to an oflsite disposal facirity would be reported Ifthe wastewater was pretreated before discharge, the amount of EG removedfrom the wastewater toould be subtractaifiom the 12.200 pounds. Mass balance estimation is more difncult

and less accurate for papermaking additives that become part of the paper product. In this case, engineering caldations and assumptions can be used alone. For non- volatile paper additives that enter the process before the formtng section, the concentration of chemicals in the white water discharged as wastewater can be set (“by engineering assumption) to be equal to their solubility in water. The engineering assumption is developed as follows. The finlshed solution entering the paper machine is saturated with the paper additive because it is retained as a solid in the paper as the web is formed. T h e white water generated from the forming section is also saturated because more solids arc removed from solution at the saveall. T h e wastewater discharged from the saveall or miGd in the sealing pits or coollng water and subsequently discharged can thus be assumed to be saturated. The solubility of a chemical in water is thus an apprordmation of the concentration of that chemical in the wastewater discharged from this section of the plant. Solubility data for many of the Section 313 chemicals can be found in Appendix B of the Section 313 general guid- ance document.

Example: Uoing an mgtreerfng assumption to estlmate releases of zinc oxide ufa wastewater.

Dwiw 1987, apapennaMngfaclllty cirscharged an auerage of 200,000 gallons of treated wastewater per day to a nearby m. zlncax&ie, whfchwasusedasa paperJuler, was added b therejbm. An esttmated 45 percent [or 90,000 gallons per day1 of the wastewaterfroom the entire

Ifthe facirrty discharged the waste-

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f i t y was generatedfrom the area in whfch the zfnc oxide was used Assmlng that the zfnc axlde concent" in the wastewater Ls equal to Its sdubQlty in water (0.00042 pound per 100 pounds H,O). the quantrty of zinc in the raw wastewater can be calculated as fdlows: Amount of Zn in raw wastewater =

0.00042 lb ZnO/ 100 Ib H,O x 8.34 lb H , O / l gal H,O x 9O.OOO gal H,O/1 day x 0.802 Ib Zn/ 1 Ib ZnO = 2.52 lb

If the plant operated 350 days during the year, the total amount of zinc released from the process into the wastewater would therefore be 882 pounds.

The preceding calculations were used to estimate the quantrty of zinc fn the mw wastewater. The operators of this facirity developed a treatment factor to consider the treatment befire discharge for various toxic compounds. They reviewed the ltierature on waste treatment inpaper- making fifties (see the refmeme section at the end of thfs pamphletl, focusing on infmnatlon applicable to the production process and treatment system at theb fa. l k y found that 80 percent of the z&tc fs removedfim the facUrty waste- water. Because zinc cannot be destroyed during treatment the amount removed was actuclrty transfmed to the waste- water sludge, which was subsequently landfilled on site. Thus, this ztnc must be considered as hawing been released as

the ztnc (1 76 pounds) passed through treatment and was released to watet; 80 percent (706 pounds) was partltroned to the wastewater sludge, whfch Is sub-

solid waste. m remafnfng 20percent of

sequently landfilled on site. using this approach. the plant fn thIs emunple could

pounds of ztnc. therefore report a release to land of 7 1 0

The waste treatment efficiency in the preceding example was derived from the literature. The best method of estimating treatment emdency is by direct measurement of the treatment process influent and efflu- ent. A treatment efficiency can be developed for any number of chemicals by conducting a direct measurement test program (monitoring the influent and effluent throughout the year is not necessary). In lieu of direct measure- ment, the use of literature sources is prob- ably the best method of estimating treatment diciency.

or base. but that acid or base is effectively neutralized in use or during wastewater treatment (to pH 6 to 9, as required by most effluent standards). no release quantities should be reported for these substances. If the acid or base is transformed into a re- portable substance, however, the quantity of this substance manufactured must be esti- mated to determine if the 'manufactured" threshold value has been reached. For exam- ple, sulfuric acid neutralized by sodium hydradde yields sodium sulfate, which is a listed chemical.

T d e Releases Via Solid Waste

for most of the lfsted tadc compounds, and emission factors are not generally available. Mass balances can be performed to determine toxlc releases, provided sufncient data are available on the quantity of chemicals in the product and/or wastewater. Engineering calculations that assume the chemical con- centration in the solid waste is the same as that in the paper product can also be used. In the case of wastewater sludge, however, dLrect measurement would be requlred or an estimate would have to be based on the treatment of the raw wastewater.

If your facility uses a listedmineral acid

Solid wastes are rarely measured directly

Example: Using a mass balance and an engfneering assumption to estimate reteases qftitanfum dioxide.

produced 150,OOO reams (1 ream = 3,300 1987, a papermakinsfkUtty

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square feet) of afine paper with a coating wetght Of 45 pounds per r e m The coating was applied by a& knife at the dry end of the f d r t y . According to operating records, the coattng contatned 4.3 percent titanium dioxide RiOJ on a dry basts. EPA has proposed to remove Ti0,jkm the Section 3 13 list; however, this example ts also representative of the use of a mass balance and an engineering assumption to estimate releases of other simflar com- pounds. The quantity of no, leaving the facffityfntheproductcanthusbe calculated as follows: . Amount of TiO, =

150,000 reams x 45 lb dry coating/l ream x 0.043 lb nO, / l lb dry coating = 290.250 Ib

A review of purchasing and stomge records at the f d r t y shows that 300,000 pounds of TiO, was processed last year. By mass balance. the quantity of TiO, lost to waste is calculated by determining the diflkrence behoeen the amom processed and the amount in the product Amount of TiO, released as solid waste =

300.000 Ib processed - 290.250 lb in product = 9,750 lb

Because no, is nonvolatile, no air emis- TiO, waste is assumed b be released as a solid waste (coating r e s b and broke

plant in this example could therefme report releases via solid waste of 9,800 pounds

sions would be txpeced and all of the

fiomfinishfngd* using this approach, the

of no,. Toxic Releases to Air

releases. these emissions are not often measured directly, and emission factors are

Because of the fugitive aspect of most air

generally not available for most compounds, For bleach plant air releases of chlorine and chlorine dioxide, however, the following emission factors (taken from the EPA publi- cation. Envfronmental Pollution Control in the hrlp and Paper Industry) can be used.

When vacuum rotary drum washers are used, total uncontrolled chlorine emissions from the bleach tower vent and from the hood vent of the sue- ceeding washing stage amount to about 1.0 pound of CJ per ton of Pulp. If a bleach plant has two chlorine dicudde stages, C10, is emitted from both the washer hood vents after the bleach towers and from the ClO, manufacturing process. If vacuum rotary drum washers are used, total ClO, emissions amount to about 0.6 pound of ClO, per ton of pulp. Plants that use pressure washers or continuous Musers will have lower emissions for both Cl, and CIO,.

Air emissions of paper additives and machine operating aids can occur from numumus locations in the process (for exam- ple. mixing and formulation, paper forming, drying. coating, finishing). As a result, all emissions of highly volatile compounds are likely to be to air. The release estimate will thus consist of simply detennining how much of the chemical was introduced in the process and then assuming that all of it is emitted to air.

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Estimating the release of other com- pounds that are only semivolatile or that chemically react du- the process is not as simple. You must first evaluate the physical properties of the chemicals (for example. solubility and vapor pressure) and then use simplifying engineering assumptions and calculations based on operattng conditions of the pmcess to tstimate emissions.

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Example: Using a mass balance with an engineering assumption to estimate air releases of fonnaldehyde.

During 1987, a papermakfng facility used 100 tons of urea-formaldehyde resin as a wet-strength agent in the wet end of its process and 200 tons as a coating component in the dry end The urea- formaldehyde resin contafned ap- proximately 1.5 percent of thefiee- formaldehyde precursor. Thus, 3,000 and 6.000 pounds offiee formaldehyde were processed as part of the resin An ad- ditional 1 7,000 pounds of fotmaldehyde was used as a wet-strength addftiw. Altogether, a total of 26.000 pounds of formaldehyde was processed at the facility.

Formaldehyde is volatile, but ft is also highly soluble in water. Formaldehyde releases can be estimated for both the wet end and the dry end of the process. In the dry end, thefree formaldehyde is con- tained in the coating formulation After the coating is added, the paper is transported through a dyer, where all of the formal- dehyde can be assumed to be released to air (6.000 pounds).

In the wet end of the process, thefree formakkhyde is contained in thejZnish that enters thepaper mhine. During paper foming, a portion of the f i - dehyde will volatilize as the web fm on the paper machine, aportion will leave fn the white water durbzg pressing, and another portion will remain in the web and volatilize as the web passes through the dyer. One portion of the white water is recouered in the saueall and returned to the process; another por#on is released to the facility sewer or recycled as sealing water or cooling water for subsequent

release to the sewer. In either case, it is probably safe to assume that all of the formaldehyde will be uolatilized either in the process or during wastewater treatment Determining whfch portions of less-volatile chemicals are released to water or air would require an assumption based on the specf@.c layout of the f d r t y .

Other Toxic ReZeases Other wastes in the paper and paper-

board production industry from which toxic chemicals may be released include:

Residues from pollution control

Wash water from equipment

Product rejects Used equipment Empty chemical containers

Releases from these sources may already

devices

cleaning

have been accounted for, depending on the release estimation methods used. These items (and any other of a similar nature) should be included in your development of a process flow diagram.

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I Step Five Complete the Toxic Chemical Release I Inventory Reporting Form. After estimating the quantity of each

chemical released via wastewater. solid waste, and air emissions, you must deter- mine the amount of each chemical released to water, land, or air or transferred to an offsite disposal facility. This determination will be based on the disposal method you use for each of your waste streams. Enter the re- lease estimates for each chemical or chemical category in Part 111 of the Toxic Chantcal Release hentory Reporting Form. Also enter the code for each treatment method used, the weight percent by which the treatment reduces the chemical in the treated waste stream, and the concentration of the chemi- cal in the influent to treatment (see instruc- tions). Report treatment methods that do not a fh t the chemical by entering '0" for removal emciency.

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ore Inform

Emergency Planning (800) 535-0202 and Community or

Hotline (in Washington, D.C. Right-tO-KIIOw (202) 479-2449

and Alaska)

Small Business (800) 368-5888

Hotline (703) 557-1938 Ombudsman or

(in Washington. D.C. and Virginia)

The EPA brochure. Emergency Planning and Community Right-to-Know Act, Section 3 13 Release Reporting Requirements (EPA 560/4-88-001) presents an overview of the new law. It identifies the types of facilities that come under the provisions of Section 3 13. the threshold chemical volumes that trigger reporting requirements, and what must be reported. It also contains a complete listing of the chemicals and chemical cate- gories subject to Section 313 reporting. The EPA publication. Estimating Releases and Waste-Treatment Efficiencies for the Toxic Chemical Release Inventory Form (EPA 560/ 4-88-0021, presents more detailed informa- tion on general release estlmation techniques than is included in this document.

Additional Sources of IrCformation on Releases From Paper and Paperboard Production U.S. Environmental Protection Agency. Fate of Toxic and Nonconventional Pollutants in Wastewater Treatment Systems Within the Pulp, Paper, and Paperboard Industry. EPA-

Cincinnati, Ohio. August 1981. US. Environmental Protection Agency. De- velopment Document for Effluent Limitations Guidelines and Standards for the Pulp, Paper, and Paperboard Point Source Cate-

163949. Washington, D.C. US. Environmental Protection Agency. Paper Production and Processing - Occupational Exposure and Environmental Release Study.

Cincinnati. Ohio. July 1984. US. Environmental Protection Agency. Com- pilation of Air Pollutant -ion Factors, Fourth-Ehon. AP-42. Research Mangle Park, North Carolina. September 1985. U.S. Environmental Protection Agency. Environmental Pollution Control in the Pulp and Paper Industry - Part I/Air. EPA-625/7-

600/2-81/158. NIlS PB81-24,7405.

gory. EPA-440/1-82/025. NTIS PB83-

EPA-600-2-84-120. NTIS PB84-215730.

76-001. NTIS PB-261708. Cincinnati. Ohio.