# Section Title

CBI Instruction General Instructions

Survey Definitions

Hydraulic Fracturing Study Questions

Formulation/Mixture #1 Questions U.S. EPA STUDY ON HYDRAULIC FRACTURING

Table of Contents

# Tab Name

Instructions

Definitions

CBI

Study Questions

Formulation #1 Questions

# Complete the questionnaire considering the following i nstructions:

When submitting maps, identify the scale of the map, th e map title and an explanation of what the map depi cts. When identifying

features on the map, either label he feature at its l ocation on the map or include in the map's legend the symbol used for identifying

the feature. ● Submit any documents you relied on in preparing you r response. Label each document submitted with the reque st number and

subpart (if applicable) to which it corresponds. Date stam p each document you submit. If anything is deleted from a document

produced in response to this request, state the reason for and the subject matter of the deletion.

If a document you submit is responsive to more than one request, please provide one copy of the document and id entify all the

requests, by number and subpart, to which it corresponds.

If you claim that an entire document responsive to this information request is a communication for which you asser t that a privilege

exists, identify the document and provide the basis for asserting the privilege. For any document for which you assert that a privilege

exists for a portion of it, provide the portion of th e document for which you are not asserting a privilege; identify the portion of the

document for which you are asserting the privilege; and provide the basis for such an assertion. Please note that regardless of the

assertion of any privilege, any facts contained in the d ocument which are responsive to this information request should be disclosed

in your response.

● Include the name, position, and title of each person( s) who provided information responsive to the request. ● For all questions and sections, read all instructions and definitions carefully.

● Each question posed should be answered. Do not leave a ny entry blank. If the answer is zero, write “0" or “z ero”. If a question is not

applicable, write “NA.” Hydraulic Fracturing

INSTRUCTIONS

● Your response is requested within 30 days of receipt of the questionnaire.

● If necessary, provide a separate narrative response to each question and/or clarify your responses in the Commen ts page.

# Instructions

When submitting maps, identify the scale of the map, th e map title and an explanation of what the map depi cts. When identifying

features on the map, either label he feature at its l ocation on the map or include in the map's legend the symbol used for identifying Submit any documents you relied on in preparing you r response. Label each document submitted with the reque st number and

subpart (if applicable) to which it corresponds. Date stam p each document you submit. If anything is deleted from a document

If a document you submit is responsive to more than one request, please provide one copy of the document and id entify all the

If you claim that an entire document responsive to this information request is a communication for which you asser t that a privilege

exists, identify the document and provide the basis for asserting the privilege. For any document for which you assert that a privilege

exists for a portion of it, provide the portion of th e document for which you are not asserting a privilege; identify the portion of the

document for which you are asserting the privilege; and provide the basis for such an assertion. Please note that regardless of the

assertion of any privilege, any facts contained in the d ocument which are responsive to this information request should be disclosed

Include the name, position, and title of each person( s) who provided information responsive to the request. Each question posed should be answered. Do not leave a ny entry blank. If the answer is zero, write “0" or “z ero”. If a question is not

If necessary, provide a separate narrative response to each question and/or clarify your responses in the Commen ts page.

# Term

"and" and "or"

"any"

Company

Concentration as

Delivered

Concentration as

Injected

Correspondence/

Communications

Describe Terms include, but are not limited to, all oral, writ ten, telephone, facsimile, and electronic correspondence

and/or communications.

To detail, depict, or give an account of the requested information, or to report the content of any oral an d/or

written correspondence, communication, or conversation, or to report the contents of any document,

including the title, the author, the position or titl e of the author, the addressee, the position or title of the

addressee, indicated or blind copies, date, subject matter , number of pages, attachment or appendices, and

all persons to whom the document was distributed, shown, or explained. Refers to the actual concentration of the chemical as it i s delivered to the site, before dilution.

Refers to the actual concentration of the chemical as it i s injected during the fracturing process following

mixing with source water. Hydraulic Fracturing

Any and all

The entity identified as the addressee on the cover let ter to this information request and all related and

affiliated corporate entities (including, but not limi ted to, parent corporations, subsidiaries, joint venture s,

partnerships, and affiliates) that perform hydraulic fr acturing services. Definition DEFINITIONS

Please use the following definitions for purposes of resp onding to the questions in this questionnaire. Except as otherwise defined below,

terms in this information request have the same definit ion used in the CWA, 33 U.S.C. §§

through 6992k, and TSCA, 15 U.S.C. §§ 2601 through 2 695d, and the regulations promulgated thereunder.

The terms shall be construed either disjunctively or conju nctively as necessary to bring within the scope of

this information request any information which might o therwise be construed to be outside its scope.

# Document(s)

Facility

Flowback Any information subject to any method of recording, sto rage, or transmittal, and shall include any

information now or formerly in your possession, custody o r control, or now or formerly in the possession,

custody or control of any agent acting on your behalf. "Document" shall include, but not limited to:

1. Writings of any kind, formal or informal, whether or not wholly or partially in handwriting, typed fo rm, or

printed form, including drafts, originals, and nonconfo rming copies that contain deletions, insertions,

handwritten notes or comments, and including (by way of illustration and not by way of limitation) any of t he

following:

a. invoices, receipts, endorsements, checks, bank drafts, cancele d checks, deposit slips, withdrawal slips,

orders;

b. letters, correspondences, faxes, telegrams, telexes, ele ctronic communications including, but not limited

to, e-mails and other correspondence using computers or ot her electronic communication devices;

c. minutes, memoranda of meetings and telephone and ot her conversations, telephone messages;

d. agreements, contracts, and the like;

e. log books, diaries, calendars, desk pads, journals;

f. bulletins, circulars, forms, pamphlets, statements;

g. reports, notice, analysis, notebook;

h. graphs, charts; or

i. records, pamphlets, surveys, manuals, statistical compilat ions, pictures.

2. Microfilm or other film record, photograph, or soun d recording on any type of device.

3. Any tape, disc, or other type of memory generally associated with computers and data processing,

together with:

a. the programming instructions and other written mate rial necessary to use such disc, disc pack, tape,

or other type of memory; and

b. printouts of such disc, disc pack, tape, or other type of memory.

4. Attachments to or enclosures with any document.

Land and all buildings, equipment structures, waste dispo sal units, pipes, and other stationary items (above

and below the surface) and characteristics/features, which a re located within the exterior boundaries of the

property or adjacent to the property owned or operat ed by the recipient of this information request.

The water mixture produced when the hydraulic fracturi ng procedure is completed and pressure is released,

and the direction of fluid flow reverses. The well is " cleaned up" by allowing water and excess proppant to

flow up through the wellbore to the surface. Both the process and the returned water are commonly referred

to as "flowback" and the term is used in both ways herein

.

# Identify/ Provide the

Identify Of

K

ow



# K

oc



# K d



# K H



# Molar Mass

Person

Produced Water

Responsible Corporate

Officer

Site

Waste/ Waste

Streams/ Wastewater Octanol-water partition coefficient, usually reported a s a unitless number

Organic carbon-water partition coefficient, units L kg -1



# Distribution coefficient, units L kg-1 With respect to a person to set forth: (a) the person's f ull name, (b) present or last known business and

home addresses and telephone numbers; (c) present or last known employer (including the full name and

address), with job title, position or business; and (d) t he person's social security number.

With respect to a corporation, partnership, business trust, government office or division, or other entity

(including a sole proprietorship), to set forth: (a) it s full name; (b) complete street address; (c) legal form

(e.g., corporation, partnership); (d) the state under whose laws the entity was organized; and (e) a brief

description of its business.

With respect to a document, to provide (a) its customary business description (e.g., letter, invoice); (b) its

date; (c) its number if any (e.g., invoice or purchase o rder number); (d) the identity of the author(s), the

address, and the addressee(s) and/or recipient(s); (e) and a summary of the substance or the subject

matter.

An individual, trust, firm, joint stock company, corporat ion (including a government corporation), limited

liability company, partnership, association, State, muni cipality, commission, political subdivision of a State,

or an interstate body.

The water mixture produced when the drilling and fra cturing of the well are complete, and water is produced

along with the natural gas. Some of this water is retu rned fracture fluid and some is natural formation wate r.

These produced waters move back through the wellhead wit h the gas.

Property where natural gas drilling and related activ ities occur, whether or not the property is owned or

leased by the Company, including all areas within the exterior boundaries of that property. Multiple wells

may be located at a single site. A president, secretary, treasurer, or vice-president of t he corporation in charge of a principal business

function, or any other person who performs similar poli cy or decision-making functions for the corporation. Henry's Law Constant, acceptable units atm L mol -1 

# or bar L mol

mol -1 

# or PA m 3 

# mol -1



# or Formula Weight units g mol -1



# By-products, residues, solid waste, hazardous waste, process w astewater, waste slurry or sludge, cooling

water, storm water runoff, and sanitary wastewater.

# Definitions

Terms include, but are not limited to, all oral, writ ten, telephone, facsimile, and electronic correspondence

To detail, depict, or give an account of the requested information, or to report the content of any oral an d/or

written correspondence, communication, or conversation, or to report the contents of any document,

including the title, the author, the position or titl e of the author, the addressee, the position or title of the

addressee, indicated or blind copies, date, subject matter , number of pages, attachment or appendices, and

all persons to whom the document was distributed, shown, or explained. Refers to the actual concentration of the chemical as it i s delivered to the site, before dilution.

Refers to the actual concentration of the chemical as it i s injected during the fracturing process following The entity identified as the addressee on the cover let ter to this information request and all related and

affiliated corporate entities (including, but not limi ted to, parent corporations, subsidiaries, joint venture s,

partnerships, and affiliates) that perform hydraulic fr acturing services. Definition Please use the following definitions for purposes of resp onding to the questions in this questionnaire. Except as otherwise defined below,

§§ 1251 through 1387, RCRA, 42 U.S.C. §§ 6901

through 6992k, and TSCA, 15 U.S.C. §§ 2601 through 2 695d, and the regulations promulgated thereunder.

The terms shall be construed either disjunctively or conju nctively as necessary to bring within the scope of

this information request any information which might o therwise be construed to be outside its scope.

# Any information subject to any method of recording, sto rage, or transmittal, and shall include any

information now or formerly in your possession, custody o r control, or now or formerly in the possession,

custody or control of any agent acting on your behalf. "Document" shall include, but not limited to:

1. Writings of any kind, formal or informal, whether or not wholly or partially in handwriting, typed fo rm, or

printed form, including drafts, originals, and nonconfo rming copies that contain deletions, insertions,

handwritten notes or comments, and including (by way of illustration and not by way of limitation) any of t he

a. invoices, receipts, endorsements, checks, bank drafts, cancele d checks, deposit slips, withdrawal slips,

b. letters, correspondences, faxes, telegrams, telexes, ele ctronic communications including, but not limited

to, e-mails and other correspondence using computers or ot her electronic communication devices;

c. minutes, memoranda of meetings and telephone and ot her conversations, telephone messages;

i. records, pamphlets, surveys, manuals, statistical compilat ions, pictures.

2. Microfilm or other film record, photograph, or soun d recording on any type of device.

3. Any tape, disc, or other type of memory generally associated with computers and data processing,

a. the programming instructions and other written mate rial necessary to use such disc, disc pack, tape,

b. printouts of such disc, disc pack, tape, or other type of memory.

Land and all buildings, equipment structures, waste dispo sal units, pipes, and other stationary items (above

and below the surface) and characteristics/features, which a re located within the exterior boundaries of the

property or adjacent to the property owned or operat ed by the recipient of this information request.

The water mixture produced when the hydraulic fracturi ng procedure is completed and pressure is released,

and the direction of fluid flow reverses. The well is " cleaned up" by allowing water and excess proppant to

flow up through the wellbore to the surface. Both the process and the returned water are commonly referred

# Octanol-water partition coefficient, usually reported a s a unitless number With respect to a person to set forth: (a) the person's f ull name, (b) present or last known business and

home addresses and telephone numbers; (c) present or last known employer (including the full name and

address), with job title, position or business; and (d) t he person's social security number.

With respect to a corporation, partnership, business trust, government office or division, or other entity

(including a sole proprietorship), to set forth: (a) it s full name; (b) complete street address; (c) legal form

(e.g., corporation, partnership); (d) the state under whose laws the entity was organized; and (e) a brief

With respect to a document, to provide (a) its customary business description (e.g., letter, invoice); (b) its

date; (c) its number if any (e.g., invoice or purchase o rder number); (d) the identity of the author(s), the

address, and the addressee(s) and/or recipient(s); (e) and a summary of the substance or the subject

An individual, trust, firm, joint stock company, corporat ion (including a government corporation), limited

liability company, partnership, association, State, muni cipality, commission, political subdivision of a State,

The water mixture produced when the drilling and fra cturing of the well are complete, and water is produced

along with the natural gas. Some of this water is retu rned fracture fluid and some is natural formation wate r.

These produced waters move back through the wellhead wit h the gas.

Property where natural gas drilling and related activ ities occur, whether or not the property is owned or

leased by the Company, including all areas within the exterior boundaries of that property. Multiple wells A president, secretary, treasurer, or vice-president of t he corporation in charge of a principal business

function, or any other person who performs similar poli cy or decision-making functions for the corporation. or bar L mol -1 

# or Pa L mol -1 

# or atm m 3 

# mol -1 

# or bar m 3



# By-products, residues, solid waste, hazardous waste, process w astewater, waste slurry or sludge, cooling

# To facilitate claims of business confidentiality, we have provided Confidential Business

Information (CBI) check boxes beside each request for which a claim of confidentiality may be

made. You may claim as confidential all information in cluded in the response to a request by

checking the CBI box next to the request. Hydraulic Fracturing

CONFIDENTIAL BUSINESS INFORMATION

Regulations governing the confidentiality of business in formation are contained in the Code of

Federal Regulations (CFR) at Title 40 Part 2, Subpar t B. Information covered by such a claim will

be disclosed by EPA only by the procedures set forth in 4 0 CFR Part 2, Subpart B. If no

confidentiality claim accompanies the information when E PA received it, the information may be

made available to the public by EPA without further notice to you.

If you wish EPA to treat any information or response a s "confidential," you must advise EPA and

comply with the following procedures. Place on or attach to the information at the time it is

submitted to EPA a cover sheet, stamped or typed legend , or other suitable form of notice

employing such language as trade secret, proprietary, or company confidential

identify allegedly confidential portions of otherwise non-confidential documents and you may want

to submit these separately to facilitate identification and handling by EPA. EPA will ask you to

substantiate each claim of confidential business informatio n by separate letter in accordance with

applicable EPA regulations, 40 CFR Part 2, Subpart B.

# CBI

To facilitate claims of business confidentiality, we have provided Confidential Business

Information (CBI) check boxes beside each request for which a claim of confidentiality may be

made. You may claim as confidential all information in cluded in the response to a request by CONFIDENTIAL BUSINESS INFORMATION

Regulations governing the confidentiality of business in formation are contained in the Code of

Federal Regulations (CFR) at Title 40 Part 2, Subpar t B. Information covered by such a claim will

be disclosed by EPA only by the procedures set forth in 4 0 CFR Part 2, Subpart B. If no

confidentiality claim accompanies the information when E PA received it, the information may be

If you wish EPA to treat any information or response a s "confidential," you must advise EPA and

comply with the following procedures. Place on or attach to the information at the time it is

submitted to EPA a cover sheet, stamped or typed legend , or other suitable form of notice

trade secret, proprietary, or company confidential . You must clearly

identify allegedly confidential portions of otherwise non-confidential documents and you may want

to submit these separately to facilitate identification and handling by EPA. EPA will ask you to

substantiate each claim of confidential business informatio n by separate letter in accordance withNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)Study QuestionsStreet Address:City:State:Telephone Number:ext.Fax Number:Email:Convenient time to call between (Eastern Time):8:005:001Rob Kirsch, Esq. (Counsel for Patterson-UTI Energy,Inc.)Wilmer Cutler Pickering Hale and Dorr LLP60 State StreetBoston02130HYDRAULIC FRACTURING STUDY QUESTIONSHydraulic FracturingCompany:To help us track your responses, please fill in thefollowing identifying and contact information:(617) 526-5000rob.kirsch@wilmerhale.comtoZip Code:(617) 526-6779NoneThroughout the questionnaire, provide the general information requested. Please provide all free response answers in the yellow highlighted areas.Provide the name of each hydraulic fracturing fluidformulation/mixture distributed or utilized by theCompany within the past five years from the date of this letter. For each formulation/mixture, pleaseclick on the corresponding hyperlink which will redirect you to a page askingyou to provide information for each constituent ofsuch product. “Constituent” includes each and every component of the product, including chemical substances, pesticides, radioactive materials and any other components.Your Name and Title:MAampmFormulation/Mixture #1Formulation/Mixture #2Formulation/Mixture #3Formulation/Mixture #4Formulation/Mixture #5Formulation/Mixture #6Formulation/Mixture #7Formulation/Mixture #8Formulation/Mixture #9Formulation/Mixture #102Gelled Water for Cased Wells- Gas PresentPlease provide the titles for all data and studiesthat your Company has in possession.Gelled Water for Openhole Wells- Oil or GasGelled Water for Shallow Gas Wells with Nitrogen AssistCrosslinkAcid BreakdownProvide all data and studies in the Company’s possession relating to the human health and environmental impacts and effects of all products and constituents identified in Question 1. Are data and other studies attached to your submittal?Gelled Water for Cased Wells- Oil PresentSlickwater ShaleNitrogenFoamAcidName of Hydraulic Fracturing FluidNone.YesNoMAampmNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)3a.CBI?See November 19, 2010 Narrative ResponsesUniversal Well Services, Inc. Environmental Response Plan for Field Operations,October 10, 2008; see November 19, 2010 Narrative ResponsesModeling and actual choice of fracturing conditionssuch as pressures,temperatures, and fracturing material choicesPolicies, Practices or Procedures, Including Standard Operating Practices(SOPs)See October 12, 2010 Question 3 AddendumSee November 19, 2010 Narrative ResponsesProcedures for managing flowback and produced watersProcedures to address unexpected circumstances suchas loss of drillingfluid/mud, loss of circulation, spills, leaks or any emergency conditions (e.g.,blow outs), less than fully effective well completionDetermination of estimated volumes of flowback andproduced watersOperationDrilling in preparation for hydraulic fracturing including calculations or otherindications for choice and composition of drillingfluids/mudsWater quality characteristics needed to prepare fracturing fluidRelationships among depth, pressure, temperature, formation geology,geophysics and chemistry and fracturing fluid composition and projectedvolumeCommentsSee November 19, 2010 Narrative ResponsesFor all hydraulic fracturing operations for naturalgas extraction involving any of the products and constituents identified in the response to Question1, describe the process including the following:Please provide any policies, practices and procedures you employ, including any Standard Operating Procedures (SOPs) concerning hydraulic fracturing sites for all of the operations listed below. Describeyour particular operations that generally fall within these categories in thecomment field.See October 12, 2010 Question 3 AddendumDetermination of exact concentration of constituents in hydraulic fracturingSee October 12, 2010 Question 3 AddendumSee October 12, 2010 Question 3 AddendumYesYesYesYesYesYesYesYesOther, specify:Other, specify:Other, specify:Other, specify:Other, specify:Other, specify:Determination of dilution ratios for hydraulic fluidsDetermination of exact concentration of constituents in hydraulic fracturingfluid formulations/mixturesSee October 12, 2010 Question 3 AddendumSee October 12, 2010 Question 3 AddendumYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)CBI? 3b.4ai.Site IdentifierCBI?CBI? City CBI? State CBI? Zip CBI? Latitude and Longitude CBI?Date of HydraulicFracturing Fluid ServiceCBI?Describe how fracturing fluid products and constituents are modified at a site during the fluid injection process.Locations of Sites Where Service Was Provided Within the Last YearIdentify all sites where, and all persons to whom,the Company provided hydraulic fracturing fluid services that involve the use of hydraulic fracturingfluids for the year prior to the date you receivedthis questionnaire. Please provide a uniqueidentifier for each site where hydraulic fracturingfluids were used. Describe the specific hydraulicfracturing fluid services provided for each of thesites, including the identity of any contractor that the Company has hired to provide any portionof such services.Service PerformedSee October 12, 2010 Question 4 ListBeyond physical modifications resulting from mixingand diluting with water, the only modification made to the fracturing fluid products listed in response to Question 1 is a chemical reaction, which UWSinitiates by combining 15% hydrochloric acid (HCl)with ammonium bifluoridesalt (NH4HF2) to produce an aqueous mixture of hydrochloric acid and hydrofluoric acid (HF). The concentration of the resulting solution is typically 12% HCl and 3% HF.Street AddressSelectSelectSelectSelectSelectYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesSite IdentifierCBI?CBI?CBI? Phone Number CBI?0000AddressContact NameContact Information for Persons for Whom Service Was Provided Within the Last YearEmail AddressSee October 12, 2010 Question 4 ListSelectSelectSelectSelectSelectSelectSelectSelectSelectSelectYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesSelectSelectSelectSelectSelectSelectSelectSelectSelectSelectYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)000000Site IdentifierCBI?CBI?CBI? Email Address CBI? Phone Number CBI?0000Contact Information for Persons Hired for HydraulicFracturing Within the Last YearContact NameService PerformedAddressSee November 19, 2010 Response toQuestion 4(b)YesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYes0000004aii.Site IdentifierCBI?CBI? City CBI? State CBI? Zip CBI? Latitude and Longitude CBI?Future Date ofHydraulic FracturingFluid ServiceCBI?Street AddressSee November 19, 2010 Response toQuestion 4(a)(ii)Service to be PerformedLocations of Sites Where Service Will Be Provided Within the Next 12 MonthsIdentify all sites where, and all persons to whom,the Company plans to provide hydraulic fracturing fluid services that involve the use of hydraulic fracturing fluids during one year after the date you received this questionniare. Please provide aunique identifier for each site where hydraulic fracturing fluids were used. Describe the specific hydraulic fracturing fluid services to be provided foreach of the sites, including the identity of any contractor that the Company will hire to provideany portion of such services.SelectYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesQuestion 4(a)(ii)SelectYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)SelectSelectSelectSelectSelectSelectSelectSelectSelectYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesSite IdentifierCBI?CBI?CBI? Phone Number CBI?00000000AddressContact Information for Persons for Whom Service Will Be Provided Within the Next 12 MonthsEmail AddressContact NameSee November 19, 2010 Response toQuestion 4(a)(ii)SelectSelectSelectSelectSelectSelectSelectSelectSelectYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesSelectSelectSelectSelectSelectSelectSelectSelectSelectYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)00Site IdentifierCBI?CBI?CBI? Email Address CBI? Phone Number CBI?0000000Contact Information for Persons Hired for HydraulicFracturing Within the Next 12 MonthsContact NameService to be PerformedAddressSee November 19, 2010 NarrativeResponsesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYes0000YesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)Gelled Water forCased Wells- GasPresentFormulation/ MixtureNameChemical Name (UseIUPACNomenclature)CBI? Chemical Formula CBI?Chemical AbstractSystem (CAS) NumberCBI?Purpose of Chemical inHydraulic Fracturing FluidFormulation/MixtureCBI?Concentration asDelivered to Site(please indicate units)CBI?How was theConcentrationDetermined?CBI?Indicate Analytical Method used toDetermine Concentration (includeanalytical preparation methodwhere applicable)CBI?Is the MSDSAttached?Gelled Water for CasedWells- Gas PresentSuperSurf methanol 67-56-130-60%None AvailableGelled Water for CasedWells- Gas PresentCla-Chek LP ethylene glycol 107-21-130-60%None AvailableGelled Water for CasedWells- Gas PresentUnigel 19XL guar gum None Available> 95%None AvailableGelled Water for CasedWells- Gas PresentUnigel 5F guar gum None Available> 95%None AvailableGelled Water for CasedWells- Gas PresentUnigel 2XL guar gum None Available> 95%None AvailableGelled Water for CasedHydraulic FracturingFormulation/Mixture Specific QuestionsFORMULATION / MIXTURE SPECIFIC QUESTIONSPlease provide information on all constituents in the formulation/mixture. If Material Safety Data Sheets (MSDSs) are available, please attach them to your submittal.Formulation/Mixture Name:Table 1. Chemical ConstituentsCalculatedNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoSurfactantClay controlGelling agentGelling agentGelling agentGelling agentAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesGelled Water for CasedWells- Gas PresentUnigel 1XLR hydroxypropyl guar 39421-75-5> 95%None AvailableGelled Water for CasedWells- Gas PresentLEB-10X ethylene glycol 107-21-130-60%None AvailableGelled Water for CasedWells- Gas PresentIron Sta IIC ethylene glycol 107-21-110-30%None AvailableGelled Water for CasedWells- Gas PresentFlomax 50 (CESI)isopropanol, citrusterpenes67-63-0, 94266-47-41-15%, 1-15%None AvailableGelled Water for CasedWells- Gas PresentFlomax 50(Clearwater)alcohol ethoxylated (C8C10 4.5 mol), isopropylalcohol, ethylene glycol68439-45-2, 67-63-0, 107-21-110-30%, 10-30%, 7-13%None AvailableGelled Water for CasedWells- Gas PresentAP Breaker ammonium persulfate 7727-54-060-100%None AvailableGelled Water for CasedWells- Gas PresentEHT Breakerammonium persulfate,cured acrylic resin, silicacrystalline quartz7727-54-0, None Available,14808-60-7>75%, >16%, <10%None AvailableGelled Water for CasedWells- Gas PresentALPHA 3385(solvent naptha,petroleum aromatic),(poly(oxy-1,ethanediyl),a-(nonylphenol)-w-hydroxy64742-94-5, 51811-79-1,91-20-3Sand Control65-100%, 30-60%, 3-7%None AvailableGelled Water for CasedWells- Gas PresentUniflo isopropyl alcohol 67-63-040-70%None AvailableGelled Water for CasedWells- Gas PresentUnislik 30 (kemira)petroleum distillatehydrotreated light,alcohols (C10-16)-64742-47-8, 68002-97-1,68439-50-9, 68551-12-210-30%, ~2.0-3.5%, 2.0-3.5%, ~2.0-3.5%None AvailableCalculatedNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoSurfactantClay controlGelling agentGelling agentGelling agentGelling agentBreaker fluidAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesCalculatedNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoIron controlSurfactantBreaker fluidBreaker fluidOther, specify:SurfactantFriction reducerAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesNoYesNoCalculatedAnalyticallyYesNoSurfactantYesYesYesYesYesYesYesYesNoWells- Gas Presentalcohols (C10-16)-ethoxylated, C12-C1468439-50-9, 68551-12-23.5%, ~2.0-3.5%CalculatedNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoSurfactantClay controlGelling agentGelling agentGelling agentGelling agentBreaker fluidAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesCalculatedNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoIron controlSurfactantBreaker fluidBreaker fluidOther, specify:SurfactantFriction reducerAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesNoYesNoCalculatedAnalyticallyYesNoSurfactantYesYesYesYesYesYesYesYesNoNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)Gelled Water for CasedWells- Gas PresentUnislik 30 (champion)hydrotreated lightdistillates64742-47-8None AvailableNone AvailableGelled Water for CasedWells- Gas PresentBioClear 10002,2-dibromo-3-nitrilopropionamide10222-01-297.6%None AvailableGelled Water for CasedWells- Gas PresentUnibacisopropyl alcohol,methanol67-63-0, 67-56-130-60%, 10-30%None AvailableGelled Water for CasedWells- Gas PresentEC6116Adibromoacetonitrile, 2,2-dibromo-3-nitrilopropionamide,polyethylene glycol3252-43-5, 10222-01-2,25322-68-31-5%, 10-30%, 30-60%None AvailableGelled Water for CasedWells- Gas PresentHEX Activatoralcohols,C12-14-secondary-ethoxylated,Alcohols, C12-14-secondary84133-50-6, 126950-60-570-100%, 1-5%None AvailableGelled Water for CasedWells- Gas PresentResin Coated Sandphenol-formaldehyderesin, formaldehyde,hexamethylenetetramine, iron oxide (fume),9003-35-4, 50-00-0, 1009-7-0, 1309-37-1, 1332-58-7,108-95-2, 14808-60-71-6%, <0.01%,<1%,<15%, <5%,<0.01%, BalanceNone AvailableGelled Water for CasedWells- Gas PresentAPI Frac Sandcrystalline silica (quartz),aluminum oxide, ironoxide, titanium oxide14808-60-7, 1344-28-1,1309-37-1, 13463-67-799.0-99.9%, <0.8%,<0.1%, <0.1%None AvailableGelled Water for CasedWells- Gas PresentActivator BXL-A proprietary ingredient None Available40-70%None AvailableGelled Water for CasedWells- Gas PresentGBL-8X None Available None AvailableNone AvailableNone AvailableGelled Water for CasedWells- Gas PresentSulfamic Acidsulfamic acid5329-14-6100%None AvailableCalculatedNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoBiocideBiocideBiocideActivatorProppantProppantActivatorAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoBreaker fluidYesYesYesYesYesYesYesCalculatedAnalyticallyYesNopH controlYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoFriction reducerYesYesYesYesYesYesYesWells- Gas PresentSulfamic Acidsulfamic acid5329-14-6100%None AvailableGelled Water Fracs forCased Wells- GasPresentPotassium Chloride Potassium Chloride 7447-40-7100%None AvailableFormulation/MixtureNameChemical Name CBI?Solubility in Water(mg L-1)Viscosity (cP) andSpecifyTemperatureVapor Pressure(acceptableunits atm, bar,Pa, mm Hg)Other(pleasespecify)Gelled Water for CasedWells- Gas PresentSuperSurfNone Available None Available None AvailableGelled Water for CasedWells- Gas PresentCla-Chek LPNone Available None Available None AvailableGelled Water for CasedWells- Gas PresentUnigel 19XL"gels" None Available None AvailableGelled Water for CasedWells- Gas PresentUnigel 5F"gels" None Available None AvailableGelled Water for CasedWells- Gas PresentUnigel 2XL"gels" None Available None AvailableGelled Water for CasedWells- Gas PresentUnigel 1XLR"gels" None Available None AvailableGelled Water for CasedWells- Gas PresentLEB-10XNone Available None Available None AvailableGelled Water for CasedIron Sta IICNone Available None Available None Available1.205None AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableDensity(g cm3or g mL-1)0.9751.045None AvailableNone AvailableMolar Mass(g mol-1)None AvailableNone AvailableNone AvailableNone Available None AvailableOrganic Carbon-Water PartitionCoefficient KOC(L kg-1)None AvailableNone AvailableOctanol- Water PartitionCoefficient KowNone AvailableNone AvailableNone AvailableNone AvailableTable 2. Chemical and Physical Properties of Chemical ConstituentsPlease provide the chemical and physical properties of the chemical constituents listed in Table 1 above.KH(acceptable units atm L mol1or bar L mol-1or Pa L mol-1oratm m3mol-1or bar m3mol-1orPa m3mol-1)None AvailableDistribution Coefficient Kd(L kg-1)None AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone Available None Available 1.220None AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableYesYesYesYesYesYesYesYesCalculatedNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoBiocideBiocideBiocideActivatorProppantProppantActivatorAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoBreaker fluidYesYesYesYesYesYesYesCalculatedAnalyticallyYesNopH controlYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoFriction reducerYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoYesYesYesYesYesYesYesGelled Water for CasedWells- Gas PresentYesYesYesYesYesYesYesYesCalculatedNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoBiocideBiocideBiocideActivatorProppantProppantActivatorAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoBreaker fluidYesYesYesYesYesYesYesCalculatedAnalyticallyYesNopH controlYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoFriction reducerYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoYesYesYesYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)Gelled Water for CasedWells- Gas PresentFlomax 50 (CESI)"69-79%" None Available None AvailableGelled Water for CasedWells- Gas PresentFlomax 50(Clearwater)None Available None Available None AvailableGelled Water for CasedWells- Gas PresentAP Breaker559000 None Available None AvailableGelled Water for CasedWells- Gas PresentEHT Breaker"Partially soluble" None Available None AvailableGelled Water for CasedWells- Gas PresentALPHA 3385None Available None Available None AvailableGelled Water for CasedWells- Gas PresentUnifloNone Available None Available None AvailableGelled Water for CasedWells- Gas PresentUnislik 30 (kemira)"Limited byviscosity"None Available "similar to water"Gelled Water for CasedWells- Gas PresentUnislik 30 (champion)"water" "1,500 cPs veryviscous"> 0.13 mm HgGelled Water for CasedWells- Gas PresentBioClear 1000"1.5%" None Available None AvailableGelled Water for CasedWells- Gas PresentUnibacNone Available None Available None AvailableGelled Water for CasedWells- Gas PresentEC6116A"Complete" 138 cps @ 68F < 0.1 mm Hg @70FGelled Water for CasedWells- Gas PresentHEX Activator"Miscible" None Available < 0.01 mm Hg @70FGelled Water for CasedWells- Gas PresentResin Coated Sand"Insoluble" None Available None AvailableGelled Water for CasedAPI Frac Sand"Insoluble" None Available None AvailableNone AvailableNone Available None Available None Available 1.025None Available None Available None AvailableNone Available None AvailableNone Available 0.895None AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone Available None Available None Available1.056None AvailableNone Available None AvailableNone Available None AvailableNone AvailableNone Available None AvailableNone Available 0.995None Available None AvailableNone Available None Available None Available None AvailableNone Available None Available None Available None AvailableNone Available 0.975None Available 1.02None Available 0.925None Available None AvailableNone Available None AvailableNone Available None AvailableNone Available None Available None Available None AvailableNone AvailableNone Available None AvailableNone Available None AvailableNone AvailableNone AvailableNone Available None Available None AvailableNone Available None Available None AvailableNone Available None AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone Available None AvailableNone Available None Available1.2501.006None Available 2.65None AvailableNone AvailableNone AvailableNone Available 2.65None AvailableNone AvailableNone AvailableNone AvailableYesYesYesYesYesYesYesYesYesYesYesYesYesYesGelled Water for CasedWells- Gas PresentAPI Frac Sand"Insoluble"None AvailableNone AvailableGelled Water for CasedWells- Gas PresentActivator BXL-ANone Available None Available None AvailableGelled Water for CasedWells- Gas PresentGBL-8X"Complete" None Available None AvailableGelled Water for CasedWells- Gas PresentSulfamic Acid"6.5 parts water @32F, 2 parts water@ 176F"None Available None AvailableGelled Water Fracs forCased Wells- GasPresentPotassium Chloride281,000 None Available None AvailableFormulation/MixtureNameProppant Name CBI?ProppantSpecificationsCBI?Is the Proppant ResinCoated?CBI?Specify the Resin CoatingMaterials UsedCBI?Gelled Water for CasedWells- Gas PresentAPI Frac Sand10/20 down to 70/140meshNot ApplicableGelled Water for CasedWells- Gas PresentResin Coated Sand16/30, 20/40, 30/50,40/70 meshphenol-formaldehyde resin,formaldehyde,hexamethylenetetramine, ironoxide (fume), hydratedGelled Water for CasedWells- Gas PresentGelled Water for CasedWells- Gas PresentGelled Water for CasedWells- Gas PresentGelled Water for CasedWells- Gas Present2.15None AvailableNone Available None AvailableNone AvailableNone Available None Available None AvailableNone AvailableNone Available None Available None AvailableNone AvailableTable 3. Proppant ConstituentsPlease provide the chemical and physical properties of the proppants listed in Table 1 above.None Available 74.5597.1None Available None Available None AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone Available1.075None AvailableNone AvailableNone AvailableNone Available2.65None Available 1.1001.987None AvailableYesYesNoYesNoYesNoYesNoYesNoNoYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesWells- Gas PresentYesYesNoYesNoYesNoYesNoYesNoNoYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)Gelled Water for CasedWells- Gas PresentYesNoYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)NameTelephoneNumberCBI?Gelled Water for CasedWells- Gas PresentSuperSurfSee October 12, 2010Narrative Responses0.5 to 1 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Gelled Water for CasedWells- Gas PresentCla-Chek LPSee October 12, 2010Narrative Responses0.5 to 1 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Gelled Water for CasedWells- Gas PresentUnigel 19XLSee October 12, 2010Narrative Responses7 to 20 lb/1000 gal See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesHercules Incorporated Hercules Incorporated302-594-5000Gelled Water for CasedWells- Gas PresentUnigel 5FSee October 12, 2010Narrative Responses7 to 20 lb/1000 gal See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesHercules Incorporated Hercules Incorporated302-594-5000Gelled Water for CasedWells- Gas PresentUnigel 2XLSee October 12, 2010Narrative Responses7 to 20 lb/1000 galSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesHercules Incorporated Hercules Incorporated302-594-5000Gelled Water for CasedWells- Gas PresentUnigel 1XLRSee October 12, 2010Narrative Responses7 to 20 lb/1000 gal See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesHercules Incorporated Hercules Incorporated302-594-5000Gelled Water for CasedWells- Gas PresentLEB-10XSee October 12, 2010Narrative Responses0.05 to 0.2 qt/1000 galSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Gelled Water for CasedWells- Gas PresentIron Sta IICSee October 12, 2010Narrative Responses0.5 to 1 gptSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Gelled Water for CasedWells- Gas PresentFlomax 50 (CESI)See October 12, 2010Narrative Responses2 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesCESI Chemical CESI Chemical580-658-6608Gelled Water for CasedWells- Gas PresentFlomax 50(Clearwater)See October 12, 2010Narrative Responses2 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Gelled Water for CasedWells- Gas PresentAP BreakerSee October 12, 2010Narrative Responses1 to 5 lb/1000 gal See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Gelled Water for CasedWells- Gas PresentEHT BreakerSee October 12, 2010Narrative Responses1 to 3 lb/1000 galSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesFritz Industries Inc Fritz Industries Inc800-633-6451100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056500 Sam Houston Road Mesquite, TX 75149Hercules Plaza 1313 North Market StreetWilmington, DE 19894100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 150561004 S. Plainsman Road Marlow, OK 73055100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056CBI?Quantity ofConstituent used inHydraulic Fracturing(please specify units)Concentration ofConstituent as Injected(please indicate units)CBI? CBI?Person Who Sold the Product and/or ConstituentsHercules Plaza 1313 North Market StreetWilmington, DE 19894Hercules Plaza 1313 North Market StreetWilmington, DE 19894Specifications to Meet SiteRequirementsRationale for SiteRequirementsManufacturer ofProduct and/orConstituentsCBI?Formulation/MixtureNameConstituentTable 4. Formulation/Mixture SpecificationsCBI? CBI?100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056Hercules Plaza 1313 North Market StreetWilmington, DE 19894AddressYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesWells- Gas PresentNarrative ResponsesNarrative ResponsesNarrative ResponsesGelled Water for CasedWells- Gas PresentALPHA 3385See October 12, 2010Narrative Responses1.5 gal/1000 lb of proppantSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Gelled Water for CasedWells- Gas PresentUnifloSee October 12, 2010Narrative Responses0.5 to 1 gptSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Gelled Water for CasedWells- Gas PresentUnislik 30 (kemira)See October 12, 2010Narrative Responses0.5 to 1 gptSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesKemira Water SolutionsIncKemira Water Solutions Inc800-879-6353Gelled Water for CasedWells- Gas PresentUnislik 30 (champion)See October 12, 2010Narrative Responses0.5 to 1 gptSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesChampion Technologies Champion Technologies724-318-1050Gelled Water for CasedWells- Gas PresentBioClear 1000See October 12, 2010Narrative Responses2 lb/500 bbl See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Gelled Water for CasedWells- Gas PresentUnibacSee October 12, 2010Narrative Responses1 to 2 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Gelled Water for CasedWells- Gas PresentEC6116ASee October 12, 2010Narrative Responses0.1 to 0.5 gptSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesNalco Nalco281-263-7000Gelled Water for CasedWells- Gas PresentHEX ActivatorSee October 12, 2010Narrative Responses10 to 20 gptSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesHexion Hexion614-225-4000Gelled Water for CasedWells- Gas PresentResin Coated SandSee October 12, 2010Narrative Responses1 to 5 lb/galSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesSantrol, Inc Santrol, Inc281-431-0670Gelled Water for CasedWells- Gas PresentAPI Frac SandSee October 12, 2010Narrative Responses0.25 to 5 lb/galSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesVariousSee October 12, 2010 NarrativeResponsesGelled Water for CasedWells- Gas PresentActivator BXL-ASee October 12, 2010Narrative Responses1 to 2 gptSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Gelled Water for CasedWells- Gas PresentGBL-8XSee October 12, 2010Narrative Responses0.05 to 0.2 qt/1000 galSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesCESI Chemical CESI Chemical580-658-6608Gelled Water for CasedWells- Gas PresentSulfamic AcidSee October 12, 2010Narrative Responses0.5 to 5 lb per 1000 galSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesSagar Enterprises; seeNovember 19, 2010Narrative ResponsesSagar Enterprises; see November19, 2010 Narrative Responses412-331-2850Gelled Water Fracs forCased Wells- GasPresentPotassium ChlorideSee October 12, 2010Narrative Responses0.17 to 0.34 lb/galSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesVariousSee October 12, 2010 NarrativeResponsesNichol Avenue M.R.I.E. Bldg 162/163/164McKees Rocks, PA 151361004 S. Plainsman Road Marlow, OK 73055100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 150567705 Highway 90-A Sugar Land, TX 77478PO Box 639 Fresno, TX 77545808 East Main Street Lakeland, FL 33801Table 5. Formulation/Mixture/Water Specifications100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056180 East Broad Street Columbus, OH 432153200 Southwest Freeway, Suite 2700 Houston,TX 77027100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056YesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesTable 5. Formulation/Mixture/Water SpecificationsYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)High Volume CBI? Average Volume CBI? Low VolumeCBI?Gelled Water forCased Wells- GasPresentRefer to responseprovided under"Range of TotalFluid Injected."See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative Responses15,000 to 120,000 gal perstage; 1 to 6 stages perwellSee October 12, 2010Narrative ResponsesSee October 12, 2010Question 3 AddendumSee October 12, 2010 Question 3AddendumSee October 12,2010 Question 3AddendumCBI?Geological Factors Associated with Low, Average, High Volumes Injected (Type of Geologic Media, Depthof Job,Extent of Fracturing Desired)CBI? CBI? CBI? CBI?Formulation/MixtureNameQuantity of WaterUsed(gallons)Incoming WaterSourceQuality of WaterRange of Total FluidInjected(Low to High)(gallons)Average Volume ofTotal Fluid Injected(gallons)YesYesYesYesYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)Gelled Water forCased Wells- OilPresentFormulation/ MixtureNameChemical Name (UseIUPACNomenclature)CBI? Chemical Formula CBI?Chemical AbstractSystem (CAS) NumberCBI?Purpose of Chemical inHydraulic Fracturing FluidFormulation/MixtureCBI?Concentration asDelivered to Site(please indicate units)CBI?How was theConcentrationDetermined?CBI?Indicate Anlytical Method used toDetermine Concentration (includeanytical preparation method whereapplicable)CBI?Is the MSDSAttached?Gelled Water for CasedWells- Oil PresentSuperSurf methanol 67-56-130-60%None AvailableGelled Water for CasedWells- Oil PresentCla-Chek LP ethylene glycol 107-21-130-60%None AvailableGelled Water for CasedWells- Oil PresentUnigel 19XL guar gum None Available> 95%None AvailableGelled Water for CasedWells- Oil PresentUnigel 5F guar gum None Available> 95%None AvailableGelled Water for CasedWells- Oil PresentUnigel 2XLguar gumNone Available> 95%None AvailableHydraulic FracturingFormulation/Mixture Specific QuestionsFORMULATION / MIXTURE SPECIFIC QUESTIONSPlease provide information on all constituents in the formulation/mixture. If Material Safety Data Sheets (MSDSs) are available, please attach them to your submittal.Table 1. Chemical ConstituentsFormulation/Mixture Name:CalculatedNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoSurfactantClay controlGelling agentGelling agentGelling agentAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesWells- Oil PresentUnigel 2XLguar gumNone Available> 95%None AvailableGelled Water for CasedWells- Oil PresentUnigel 1XLR hydroxypropyl guar 39421-75-5> 95%None AvailableGelled Water for CasedWells- Oil PresentLEB-10X ethylene glycol 107-21-130-60%None AvailableGelled Water for CasedWells- Oil PresentGBL-8X None Available None AvailableNone AvailableNone AvailableGelled Water for CasedWells- Oil PresentIron Sta IIC ethylene glycol 107-21-110-30%None AvailableGelled Water for CasedWells- Oil PresentNDL-100toluene, xylene,isopropyl alcohol,ethylbenzene108-88-3, 1330-20-7, 67-63-0, 100-41-4Fluid Leakoff Control30-60%, 30-60%, 15-40%, 10-30%None AvailableGelled Water for CasedWells- Oil PresentFlomax 50 (CESI)isopropanol, citrusterpenes67-63-0, 94266-47-41-15%, 1-15%None AvailableGelled Water for CasedWells- Oil PresentFlomax 50(Clearwater)alcohol ethoxylated (C8C10 4.5 mol), isopropylalcohol, ethylene glycol68439-45-2, 67-63-0, 107-21-110-30%, 10-30%, 7-13%None AvailableGelled Water for CasedWells- Oil PresentALPHA 3385(solvent naptha,petroleum aromatic),(poly(oxy-1,ethanediyl),a-(nonylphenol)-w-hydroxy64742-94-5, 51811-79-1,91-20-3Sand Control65-100%, 30-60%, 3-7%None AvailableCalculatedNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoSurfactantClay controlGelling agentGelling agentGelling agentGelling agentBreaker fluidAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesCalculatedNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoBreaker fluidIron controlOther, specify:SurfactantOther, specify:AnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoSurfactantYesYesYesYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)Gelled Water for CasedWells- Oil PresentNE-50isopropyl alcohol,methanol67-63-0, 67-56-1Non-emulsifier30-60%, 10-30%None AvailableGelled Water for CasedWells- Oil PresentNE-70methanol, naphthalene,2-ethylhexanol67-56-1, 91-20-3, 104-76-7Non-emulsifier5-10%, 3-7%, 3-7%None AvailableGelled Water for CasedWells- Oil PresentNE-90methanol, heavyaromatic naphtha,polyethylene glycol,isopropanol, (EO-C7-9-67-56-1, 64742-94-5,25322-68-3, 67-63-0,78330-19-5, 78330-20-8,104-76-7, 91-20-3Non-emulsifier30-60%, 1-5%, 1-5%, 5-10%, 1-5%, 1-5%, 5-10%, 0.1-1%None AvailableGelled Water for CasedWells- Oil PresentUniflo isopropyl alcohol 67-63-040-70%None AvailableGelled Water for CasedWells- Oil PresentUnislik 30 (kemira)petroleum distillatehydrotreated light,alcohols (C10-16)-ethoxylated, C12-C1464742-47-8, 68002-97-1,68439-50-9, 68551-12-210-30%, ~2.0-3.5%, 2.0-3.5%, ~2.0-3.5%None AvailableGelled Water for CasedWells- Oil PresentUnislik 30 (champion)hydrotreated lightdistillates64742-47-8None AvailableNone AvailableGelled Water for CasedWells- Oil PresentBioClear 10002,2-dibromo-3-nitrilopropionamide10222-01-297.6%None AvailableGelled Water for CasedWells- Oil PresentUnibacisopropyl alcohol,methanol67-63-0, 67-56-130-60%, 10-30%None AvailableGelled Water for CasedWells- Oil PresentEC6116Adibromoacetonitrile, 2,2-dibromo-3-nitrilopropionamide,3252-43-5, 10222-01-2,25322-68-31-5%, 10-30%, 30-60%None AvailableCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoOther, specify:Other, specify:YesYesYesYesYesYesYesYesYesYesYesYesYesYesCalculatedNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoOther, specify:SurfactantFriction reducerBiocideBiocideBiocideAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoFriction reducerYesYesYesYesYesYesYesWells- Oil Presentnitrilopropionamide,polyethylene glycol25322-68-3Gelled Water for CasedWells- Oil PresentParaSurftoluene, xylene,ethylbenzene108-88-3, 1330-20-7, 100-41-440-70%, 30-60%, 15-40%None AvailableGelled Water for CasedWells- Oil PresentParanoxglycol ethers, toluene,xylene, 2-ethylhexanol,ethylbenzene111-76-2, 108-88-3, 1330-20-7, 104-76-7, 100-41-4paraffin crystal modifier5-10%, 40-70%, 30-60%, 3-7%, 15-40%None AvailableGelled Water for CasedWells- Oil PresentParasol IIethylbenzene, solventnaphtha, toluene, xylene100-41-4, 64742-88-7, 108-88-3, 1330-20-77-13%, 40-70%, 30-60%, 15-40%None AvailableGelled Water for CasedWells- Oil PresentMutual Solvent (MS10)EB-Butyl Cellosolve 111-76-2> 60%None AvailableGelled Water for CasedWells- Oil PresentHEX Activatoralcohols,C12-14-secondary-ethoxylated,Alcohols, C12-14-secondary84133-50-6, 126950-60-570-100%, 1-5%None AvailableGelled Water for CasedWells- Oil PresentResin Coated Sandphenol-formaldehyderesin, formaldehyde,hexamethylenetetramine, iron oxide (fume),9003-35-4, 50-00-0, 1009-7-0, 1309-37-1, 1332-58-7,108-95-2, 14808-60-71-6%, <0.01%,<1%,<15%, <5%,<0.01%, BalanceNone AvailableGelled Water for CasedWells- Oil PresentAPI Frac Sandcrystalline silica (quartz),aluminum oxide, ironoxide, titanium oxide14808-60-7, 1344-28-1,1309-37-1, 13463-67-799.0-99.9%, <0.8%,<0.1%, <0.1%None AvailableGelled Water for CasedWells- Oil PresentParahib 2000xylene, ethylbenzene,light aromatic naphtha,1,2,4- Trimethylbenzene,1,3,5- trimethylbenzene1330-20-7, 100-41-4,64742-95-6, 95-63-6, 108-67-8paraffin inhibitor30-60%, 5-10%, 1-5%, 1-5%, 0.1-1%None AvailableGelled Water for CasedWells- Oil PresentUAD 100Ethoxylated fatty acidester, alkylaryl sulfonatetrade secret, trade secretNone Available, NoneAvailableNone AvailableCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoOther, specify:Other, specify:YesYesYesYesYesYesYesYesYesYesYesYesYesYesCalculatedNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoOther, specify:SurfactantFriction reducerBiocideBiocideBiocideSurfactantAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesCalculatedNoOther, specify:AnalyticallyYesYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoSolventSolventActivatorProppantYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesCalculatedNoProppantAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesCalculatedNoOther, specify:AnalyticallyYesYesYesYesYesYesYesYesCalculatedNoOther, specify:AnalyticallyYesYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoFriction reducerYesYesYesYesYesYesYesWells- Oil PresentUAD 100ester, alkylaryl sulfonatetrade secret, trade secretacid emulsifierAvailableNone AvailableCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoOther, specify:Other, specify:YesYesYesYesYesYesYesYesYesYesYesYesYesYesCalculatedNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoOther, specify:SurfactantFriction reducerBiocideBiocideBiocideSurfactantAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesCalculatedNoOther, specify:AnalyticallyYesYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoSolventSolventActivatorProppantYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesCalculatedNoProppantAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesCalculatedNoOther, specify:AnalyticallyYesYesYesYesYesYesYesYesCalculatedNoOther, specify:AnalyticallyYesYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoFriction reducerYesYesYesYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)Gelled Water for CasedWells- Oil PresentXylene Xylene 1330-20-790-100%None AvailableFormulation/MixtureNameChemical Name CBI?Solubility in Water(mg L-1)Viscosity (cP)and SpecifyTemperatureVapor Pressure(acceptableunits atm, bar,Pa, mm Hg)Other(pleasespecify)Gelled Water for CasedWells- Oil PresentSuperSurfNone Available None Available None Available None AvailableGelled Water for CasedWells- Oil PresentCla-Chek LPNone Available None Available None Available None AvailableGelled Water for CasedWells- Oil PresentUnigel 19XL"gels" None Available None Available None AvailableGelled Water for CasedWells- Oil PresentUnigel 5F"gels" None Available None Available None AvailableGelled Water for CasedWells- Oil PresentUnigel 2XL"gels" None Available None Available None AvailableGelled Water for CasedWells- Oil PresentUnigel 1XLR"gels" None Available None Available None AvailableGelled Water for CasedWells- Oil PresentLEB-10XNone Available None Available None Available None AvailableGBL-8X"Complete"None AvailableNone AvailableNone AvailableNone AvailableOctanol- Water PartitionCoefficient KowNone AvailableNone AvailableTable 2. Chemical and Physical Properties of Chemical ConstituentsPlease provide the chemical and physical propertiesof the chemical constituents listed in Table 1 above.None AvailableNone AvailableNone Available1.100None AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableOrganic Carbon-Water PartitionCoefficient KOC(L kg-1)None AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableDistribution Coefficient Kd(L kg-1)None AvailableNone AvailableNone AvailableNone AvailableNone AvailableKH(acceptable units atm L mol1or bar L mol-1or Pa L mol-1oratm m3mol-1or bar m3mol-1orPa m3mol-1)None AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone Available None AvailableDensity(g cm3or g mL-1)0.9751.045None AvailableMolar Mass(g mol-1)None AvailableNone AvailableNone Available1.205YesYesYesYesYesYesYesYesCalculatedNoSolventAnalyticallyYesYesYesYesYesYesYesYesGelled Water for CasedWells- Oil PresentGBL-8X"Complete"None AvailableNone AvailableNone AvailableGelled Water for CasedWells- Oil PresentIron Sta IICNone Available None Available None Available None AvailableGelled Water for CasedWells- Oil PresentNDL-100None Available None Available None AvailableNone AvailableGelled Water for CasedWells- Oil PresentFlomax 50 (CESI)"69-79%" None Available None Available None AvailableGelled Water for CasedWells- Oil PresentFlomax 50(Clearwater)None Available None Available None Available None AvailableGelled Water for CasedWells- Oil PresentALPHA 3385None Available None Available None Available None AvailableGelled Water for CasedWells- Oil PresentNE-50None Available None Available None AvailableNone AvailableGelled Water for CasedWells- Oil PresentNE-70None Available None Available None AvailableNone AvailableGelled Water for CasedWells- Oil PresentNE-90"dispersible" "7 cst @ 100F" None AvailableNone AvailableGelled Water for CasedWells- Oil PresentUnifloNone Available None Available None Available None AvailableGelled Water for CasedWells- Oil PresentUnislik 30 (kemira)"Limited byviscosity"None Available "similar to water" None AvailableGelled Water for CasedWells- Oil PresentUnislik 30 (champion)"water" "1,500 cPs veryviscous"> 0.13 mm Hg None AvailableNone Available1.025None Available 1.02None Available None AvailableNone Available 1.06490.925None Available None AvailableNone AvailableNone Available None Available None Available None Available0.995None Available None Available None Available None AvailableNone AvailableNone Available 0.975None Available 0.88None Available None Available None Available None AvailableNone Available 0.8949None AvailableNone Available None Available None AvailableNone AvailableNone AvailableNone Available None Available None AvailableNone AvailableNone Available None AvailableNone AvailableNone AvailableNone AvailableNone Available1.056None Available None Available None AvailableNone Available0.8799None Available None Available1.100None Available None Available None Available None Available None Available 1.220None AvailableNone AvailableNone Available None AvailableNone AvailableNone AvailableNone AvailableNone Available None AvailableYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesCalculatedNoSolventAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesCalculatedNoSolventAnalyticallyYesYesYesYesYesYesYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)Gelled Water for CasedWells- Oil PresentBioClear 1000"1.5%" None Available None Available None AvailableGelled Water for CasedWells- Oil PresentUnibacNone Available None Available None Available None AvailableGelled Water for CasedWells- Oil PresentEC6116A"Complete" 138 cps @ 68F < 0.1 mm Hg @70FNone AvailableGelled Water for CasedWells- Oil PresentParaSurfNone Available None Available None AvailableNone AvailableGelled Water for CasedWells- Oil PresentParanoxNone Available None Available None AvailableNone AvailableGelled Water for CasedWells- Oil PresentParasol IINone Available None Available None AvailableNone AvailableGelled Water for CasedWells- Oil PresentMutual Solvent (MS10)None Available None Available None AvailableNone AvailableGelled Water for CasedWells- Oil PresentHEX Activator"Miscible" None Available < 0.01 mm Hg @70FNone AvailableGelled Water for CasedWells- Oil PresentResin Coated Sand"Insoluble" None Available None Available None AvailableGelled Water for CasedWells- Oil PresentAPI Frac Sand"Insoluble" None Available None Available None AvailableGelled Water for CasedWells- Oil PresentParahib 2000"negligible" None Available 5.7 mm Hg @21CNone AvailableGelled Water for CasedWells- Oil PresentUAD 100"dispersible" None Available 0.93 mm Hg @21CNone AvailableGelled Water for CasedXylene146 -175None AvailableNone AvailableNone AvailableNone Available 0.890None Available None Available None Available None AvailableNone Available None Available None Available None Available None Available 2.65None Available None AvailableNone Available None Available None Available None AvailableNone Available None AvailableNone Available 0.8527None Available 0.9015None Available 2.65None Available None Available None Available None AvailableNone Available 1.006None Available None Available None Available None AvailableNone Available 0.8699None Available None AvailableNone Available None Available None Available None AvailableNone Available None Available0.8949None Available None Available None Available None Available None Available 1.250None Available None Available None Available None Available None Available 0.895None Available None Available None Available None Available None Available None AvailableNone AvailableNone Available106.160.84None AvailableNone Available None Available None Available None Available None Available 1.0112.77 - 3.15None AvailableYesYesYesYesYesYesYesYesYesYesYesYesYesGelled Water for CasedWells- Oil PresentXylene146 -175None AvailableNone AvailableNone AvailableFormulation/MixtureNameProppant Name CBI?ProppantSpecificationsCBI?Is the Proppant ResinCoated?CBI?Specify the Resin CoatingMaterials UsedCBI?Gelled Water for CasedWells- Oil PresentAPI Frac Sand10/20 down to 70/140meshNot ApplicableGelled Water for CasedWells- Oil PresentResin Coated Sand16/30, 20/40, 30/50,40/70 meshphenol-formaldehyde resin,formaldehyde,hexamethylenetetramine, ironGelled Water for CasedWells- Oil PresentGelled Water for CasedWells- Oil PresentGelled Water for CasedWells- Oil PresentGelled Water for CasedWells- Oil PresentGelled Water for CasedWells- Oil PresentTable 3. Proppant ConstituentsPlease provide the chemical and physical propertiesof the proppants listed in Table 1 above.None Available106.160.84None Available2.77 - 3.15None AvailableYesYesNoYesNoYesNoYesNoYesNoYesNoNoYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesNoNoYesYesYesYesYesYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)NameTelephoneNumberCBI?Gelled Water for CasedWells- Oil PresentSuperSurfSee October 12, 2010Narrative Responses0.5 to 1 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Gelled Water for CasedWells- Oil PresentCla-Chek LPSee October 12, 2010Narrative Responses0.5 to 1 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Gelled Water for CasedWells- Oil PresentUnigel 19XLSee October 12, 2010Narrative Responses7 to 20 lb/1000 gal See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesHercules Incorporated Hercules Incorporated302-594-5000Gelled Water for CasedWells- Oil PresentUnigel 5FSee October 12, 2010Narrative Responses7 to 20 lb/1000 gal See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesHercules Incorporated Hercules Incorporated302-594-5000Gelled Water for CasedWells- Oil PresentUnigel 2XLSee October 12, 2010Narrative Responses7 to 20 lb/1000 galSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesHercules Incorporated Hercules Incorporated302-594-5000Gelled Water for CasedWells- Oil PresentUnigel 1XLRSee October 12, 2010Narrative Responses7 to 20 lb/1000 gal See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesHercules Incorporated Hercules Incorporated302-594-5000Gelled Water for CasedWells- Oil PresentLEB-10XSee October 12, 2010Narrative Responses0.05 to 0.2 qt/1000 galSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Gelled Water for CasedWells- Oil PresentGBL-8XSee October 12, 2010Narrative Responses0.05 to 0.2 qt/1000 galSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesCESI Chemical CESI Chemical580-658-6608Gelled Water for CasedWells- Oil PresentIron Sta IICSee October 12, 2010Narrative Responses0.5 to 1 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Gelled Water for CasedWells- Oil PresentNDL-100See October 12, 2010Narrative Responses0.5 to 2 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Gelled Water for CasedWells- Oil PresentFlomax 50 (CESI)See October 12, 2010Narrative Responses2 gptSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesCESI Chemical CESI Chemical580-658-6608Table 4. Formulation/Mixture SpecificationsCBI? CBI?Specifications to Meet SiteRequirementsRationale for SiteRequirementsCBI? CBI?Formulation/MixtureNameConstituentQuantity of Constituentused in HydraulicFracturing (pleasespecify units)Concentration ofConstituent as Injected(please indicate units)Hercules Plaza 1313 North Market StreetWilmington, DE 19894Hercules Plaza 1313 North Market StreetWilmington, DE 19894Hercules Plaza 1313 North Market StreetWilmington, DE 19894Manufacturer ofProduct and/orConstituentsCBI?Hercules Plaza 1313 North Market StreetWilmington, DE 19894100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 150561004 S. Plainsman Road Marlow, OK 73055100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056CBI?Address100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056Person Who Sold the Product and/or Constituents1004 S. Plainsman Road Marlow, OK 73055YesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesWells- Oil PresentFlomax 50 (CESI)Narrative ResponsesNarrative ResponsesNarrative ResponsesCESI ChemicalCESI Chemical580-658-6608Gelled Water for CasedWells- Oil PresentFlomax 50(Clearwater)See October 12, 2010Narrative Responses2 gptSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Gelled Water for CasedWells- Oil PresentALPHA 3385See October 12, 2010Narrative Responses1.5 gal/1000 lb of proppantSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Gelled Water for CasedWells- Oil PresentNE-50See October 12, 2010Narrative Responses0.5 to 1 gptSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Gelled Water for CasedWells- Oil PresentNE-70See October 12, 2010Narrative Responses0.5 to 1 gptSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Gelled Water for CasedWells- Oil PresentNE-90See October 12, 2010Narrative Responses0.5 to 1 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesNalco Nalco281-263-7000Gelled Water for CasedWells- Oil PresentUnifloSee October 12, 2010Narrative Responses0.5 to 1 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Gelled Water for CasedWells- Oil PresentUnislik 30 (kemira)See October 12, 2010Narrative Responses0.5 to 1 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesKemira Water SolutionsIncKemira Water Solutions Inc800-879-6353Gelled Water for CasedWells- Oil PresentUnislik 30 (champion)See October 12, 2010Narrative Responses0.5 to 1 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesChampion Technologies Champion Technologies724-318-1050Gelled Water for CasedWells- Oil PresentBioClear 1000See October 12, 2010Narrative Responses2 lb/500 bblSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Gelled Water for CasedWells- Oil PresentUnibacSee October 12, 2010Narrative Responses1 to 2 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Gelled Water for CasedWells- Oil PresentEC6116ASee October 12, 2010Narrative Responses0.1 to 0.5 gptSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesNalco Nalco281-263-7000Gelled Water for CasedWells- Oil PresentParaSurfSee October 12, 2010Narrative Responses25 to 50 gal per stageSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Gelled Water for CasedWells- Oil PresentParanoxSee October 12, 2010Narrative Responses25 to 50 gal per stage See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Gelled Water for CasedWells- Oil PresentParasol IISee October 12, 2010Narrative Responses25 to 50 gal per stage See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Gelled Water for CasedWells- Oil PresentMutual Solvent (MS10)See October 12, 2010Narrative Responses25 to 50 gal per stageSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-10507705 Highway 90-A Sugar Land, TX 77478100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 150563200 Southwest Freeway, Suite 2700 Houston,TX 77027100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 150567705 Highway 90-A Sugar Land, TX 77478100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056808 East Main Street Lakeland, FL 33801100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 150561004 S. Plainsman Road Marlow, OK 73055100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056YesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesWells- Oil Present10)Narrative ResponsesNarrative ResponsesNarrative ResponsesChemistryClearwater Engineered Chemistry724-318-1050Leetsdale, PA 15056YesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)Gelled Water for CasedWells- Oil PresentHEX ActivatorSee October 12, 2010Narrative Responses10 to 20 gptSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesHexion Hexion614-225-4000Gelled Water for CasedWells- Oil PresentResin Coated SandSee October 12, 2010Narrative Responses1 to 5 lb/galSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesSantrol, Inc Santrol, Inc281-431-0670Gelled Water for CasedWells- Oil PresentAPI Frac SandSee October 12, 2010Narrative Responses0.25 to 5 lb/galSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesVariousSee October 12, 2010 NarrativeResponsesGelled Water for CasedWells- Oil PresentParahib 2000See October 12, 2010Narrative Responses5 to 10 gal per 500 bblSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesAquaness Chemical Aquaness Chemical800-231-3606Gelled Water for CasedWells- Oil PresentUAD 100See October 12, 2010Narrative Responses1 to 5 gptSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesAquaness Chemical Aquaness Chemical800-231-3606Gelled Water for CasedWells- Oil PresentXyleneSee October 12, 2010Narrative Responses25 to 50 gal per stageSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050High Volume CBI? Average Volume CBI? Low VolumeCBI?Gelled Water forCased Wells- OilPresentRefer to responseprovided under"Range of TotalFluid Injected."See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative Responses15,000 to 120,000 gal perstage; 1 to 6 stages perwellSee October 12, 2010Narrative ResponsesSee October 12, 2010Question 3 AddendumSee October 12, 2010 Question 3AddendumSee October 12,2010 Question 3AddendumTable 5. Formulation/Mixture/Water SpecificationsFormulation/MixtureNameQuantity of WaterUsed(gallons)Incoming WaterSourceQuality of WaterRange of Total FluidInjected(Low to High)(gallons)Average Volume ofTotal Fluid Injected(gallons)CBI? CBI? CBI? CBI?12645 W. Airport Blvd. PO Box 5050 Sugarland,TX 77487180 East Broad Street Columbus, OH 43215PO Box 639 Fresno, TX 77545CBI?Geological Factors Associated with Low, Average, High Volumes Injected (Type of Geologic Media, Depthof Job,Extent of Fracturing Desired)100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 1505612645 W. Airport Blvd. PO Box 5050 Sugarland,TX 77487YesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)Slickwater ShaleFormulation/ MixtureNameChemical Name (UseIUPACNomenclature)CBI? Chemical Formula CBI?Chemical AbstractSystem (CAS) NumberCBI?Purpose of Chemical inHydraulic Fracturing FluidFormulation/MixtureCBI?Concentration asDelivered to Site(please indicate units)CBI?How was theConcentrationDetermined?CBI?Indicate Analytical Method used toDetermine Concentration (includeanalytical preparation methodwhere applicable)CBI?Is the MSDSAttached?Slickwater Shale Unislik ST 50hydrotreated lightdistillate64742-47-810-30%None AvailableSlickwater Shale FRP-121 None Available None AvailableNone AvailableNone AvailableSlickwater Shale Flomax 50 (CESI)isopropanol, citrusterpenes67-63-0, 94266-47-41-15%, 1-15%None AvailableSlickwater ShaleFlomax 50(Clearwater)alcohol ethoxylated (C8C10 4.5 mol), isopropylalcohol, ethylene glycol68439-45-2, 67-63-0, 107-21-110-30%, 10-30%, 7-13%None AvailableSlickwater Shale EC6116Adibromoacetonitrile, 2,2-dibromo-3-nitrilopropionamide,polyethylene glycol3252-43-5, 10222-01-2,25322-68-31-5%, 10-30%, 30-60%None AvailableFormulation/Mixture Name:Table 1. Chemical ConstituentsHydraulic FracturingFormulation/Mixture Specific QuestionsFORMULATION / MIXTURE SPECIFIC QUESTIONSPlease provide information on all constituents in the formulation/mixture. If Material Safety Data Sheets (MSDSs) are available, please attach them to your submittal.CalculatedNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoFriction reducerFriction reducerSelectSelectScale inhibitorAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesSurfactantYesYesYesYesBiocideYesYesYesYesCalculatedAnalyticallyYesNoSelectYesYesYesYesYesYesYesSurfactantYesYesYesYesSlickwater Shale ScaleHib 100 ethylene glycol 107-21-130-60%None AvailableSlickwater Shale Iron Sta IIC ethylene glycol 107-21-110-30%None AvailableSlickwater Shale Unigel CMHPGcarboxymethylhydroxypropyl guar blendNone AvailableNone AvailableNone AvailableSlickwater Shale LEB-10X ethylene glycol 107-21-130-60%None AvailableSlickwater Shale GBL-8X None Available None AvailableNone AvailableNone AvailableSlickwater Shale O2 Scavenger ammonium bisulfite 10192-30-065-100%None AvailableSlickwater Shale Adomite Aquatalc, oxyalkylatedalcohol, perlite14807-96-6, Proprietary,93763-70-3, 55465-40-2fluid leakoff control5-10%, 1-5%, 5-10%None AvailableSlickwater ShaleAdomite Regain (FLC-100)starch 9005-25-8fluid leakoff control30-60%None AvailableSlickwater Shale NCL ethylene glycol 107-21-130-60%None AvailableCalculatedNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoFriction reducerFriction reducerSelectSelectScale inhibitorSelectGelling agentAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesCalculatedNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoSelectSelectOxygen scavengerOther, specify:Other, specify:Clay controlAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesSurfactantYesYesYesYesBiocideYesYesYesYesIron controlYesYesYesYesBreaker fluidYesYesYesYesBreaker fluidYesYesYesYesCalculatedAnalyticallyYesNoSelectYesYesYesYesYesYesYesSurfactantYesYesYesYesCalculatedNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoFriction reducerFriction reducerSelectSelectScale inhibitorSelectGelling agentAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesCalculatedNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoSelectSelectOxygen scavengerOther, specify:Other, specify:Clay controlAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesSurfactantYesYesYesYesBiocideYesYesYesYesIron controlYesYesYesYesBreaker fluidYesYesYesYesBreaker fluidYesYesYesYesCalculatedAnalyticallyYesNoSelectYesYesYesYesYesYesYesSurfactantYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)Slickwater Shale Resin Coated Sandphenol-formaldehyderesin, formaldehyde,hexamethylenetetramine, iron oxide (fume),9003-35-4, 50-00-0, 1009-7-0, 1309-37-1, 1332-58-7,108-95-2, 14808-60-71-6%, <0.01%,<1%,<15%, <5%,<0.01%, BalanceNone AvailableSlickwater Shale Ceramic Proppant corundum, mullite 1302-74-5, 1302-93-840-60%, 35-60%None AvailableSlickwater Shale API Frac Sandcrystalline silica (quartz),aluminum oxide, ironoxide, titanium oxide14808-60-7, 1344-28-1,1309-37-1, 13463-67-799.0-99.9%, <0.8%,<0.1%, <0.1%None AvailableFormulation/MixtureNameChemical Name CBI?Solubility in Water(mg L-1)Viscosity (cP)and SpecifyTemperatureVapor Pressure(acceptableunits atm, bar,Pa, mm Hg)Other(pleasespecify)Slickwater ShaleUnislik ST 50"inverted emulsion" None Available None AvailableNone AvailableSlickwater ShaleFRP-121"completelymiscible"None Available None AvailableNone AvailableSlickwater ShaleFlomax 50 (CESI)"69-79%" None Available None Available None AvailableSlickwater ShaleFlomax 50(Clearwater)None Available None Available None Available None AvailableEC6116A"Complete"138 cps @ 68F< 0.1 mm Hg @None AvailableNone Available None AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone Available1.2500.995Octanol- Water PartitionCoefficient KowNone AvailableNone AvailableNone AvailableNone Available None AvailableMolar Mass(g mol-1)None AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone Available1.056None AvailableDensity(g cm3or g mL-1)1.03None AvailableKH(acceptable units atm L mol1or bar L mol-1or Pa L mol-1oratm m3mol-1or bar m3mol-1orPa m3mol-1)None AvailableDistribution Coefficient Kd(L kg-1)Organic Carbon-Water PartitionCoefficient KOC(L kg-1)Table 2. Chemical and Physical Properties of Chemical ConstituentsPlease provide the chemical and physical propertiesof the chemical constituents listed in Table 1 above.None AvailableNone Available None AvailableYesYesYesYesCalculatedAnalyticallyYesNoSelectYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoProppantYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoSelectYesYesYesYesYesYesYesProppantYesYesYesYesProppantYesYesYesYesYesSlickwater ShaleEC6116A"Complete"138 cps @ 68F< 0.1 mm Hg @70FNone AvailableSlickwater ShaleScaleHib 100None Available None Available None AvailableNone AvailableSlickwater ShaleIron Sta IICNone Available None Available None Available None AvailableSlickwater ShaleUnigel CMHPG"miscible with water,limited by viscosity""25 cps" None AvailableNone AvailableSlickwater ShaleLEB-10XNone Available None Available None Available None AvailableSlickwater ShaleGBL-8X"complete" None Available None Available None AvailableSlickwater ShaleO2 Scavenger"soluble" None Available None AvailableNone AvailableSlickwater ShaleAdomite Aqua"complete" None Available None AvailableNone AvailableSlickwater ShaleAdomite Regain (FLC-100)"complete" None Available None AvailableNone AvailableSlickwater ShaleNCLNone Available None Available None AvailableNone AvailableSlickwater ShaleResin Coated Sand"Insoluble" None Available None Available None AvailableSlickwater ShaleCeramic Proppant"insoluble" None Available None AvailableNone AvailableSlickwater ShaleAPI Frac Sand"Insoluble" None Available None Available None AvailableNone AvailableNone Available None AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone Available None AvailableNone Available 1.205None AvailableNone AvailableNone AvailableNone Available 1.340None Available1.100None AvailableNone AvailableNone AvailableNone Available1.2501.1751.220None AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone Available None Available None AvailableNone Available None Available None AvailableNone Available None Available None AvailableNone Available None Available None AvailableNone Available None Available None Available None Available None AvailableNone Available None Available None AvailableNone AvailableNone AvailableNone Available None Available None Available None AvailableNone Available None Available None AvailableNone AvailableNone AvailableNone Available None AvailableNone AvailableNone Available None Available None Available2.65None Available3.3None AvailableNone AvailableNone Available 1.045None Available2.65YesYesYesYesYesYesYesCalculatedAnalyticallyYesNoSelectYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoProppantYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoSelectYesYesYesYesYesYesYesYesProppantYesYesYesYesProppantYesYesYesYesYesSlickwater ShaleYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoSelectYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoProppantYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoSelectYesYesYesYesYesYesYesYesProppantYesYesYesYesProppantYesYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)Formulation/MixtureNameProppant Name CBI?ProppantSpecificationsCBI?Is the Proppant ResinCoated?CBI?Specify the Resin CoatingMaterials UsedCBI?Slickwater Shale Resin Coated Sand16/30, 20/40, 30/50,40/70 meshphenol-formaldehyde resin,formaldehyde,hexamethylenetetramine, ironSlickwater Shale Ceramic Proppant 40/80Not ApplicableSlickwater Shale API Frac Sand20/40, 30/50, 40/70,70/140Not ApplicableSlickwater ShaleSlickwater ShaleSlickwater ShaleSlickwater ShaleTable 3. Proppant ConstituentsPlease provide the chemical and physical propertiesof the proppants listed in Table 1 above.YesYesNoYesNoYesNoYesNoYesNoYesNoNoYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesNoYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)NameTelephoneNumberCBI?Slickwater Shale Unislik ST 50See October 12, 2010Narrative Responses0.5 to 1.5 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesCESI Chemical CESI Chemical580-658-6608Slickwater Shale FRP-121See October 12, 2010Narrative Responses3 to 7 lb/1000 gal See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesSNF, Inc SNF, Inc912-884-3366Slickwater Shale Flomax 50 (CESI)See October 12, 2010Narrative Responses2 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesCESI Chemical CESI Chemical580-658-6608Slickwater ShaleFlomax 50(Clearwater)See October 12, 2010Narrative Responses2 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Slickwater Shale EC6116ASee October 12, 2010Narrative Responses0.1 to 0.5 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesNalco Nalco281-263-7000Slickwater Shale ScaleHib 100See October 12, 2010Narrative Responses0.1 to 0.4 gptSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Slickwater Shale Iron Sta IICSee October 12, 2010Narrative Responses0.2 to 0.5 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Slickwater Shale Unigel CMHPGSee October 12, 2010Narrative Responses25 to 50 lb per stageSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesHerculed Incorporated Hercules Incorporated302-594-5000Slickwater Shale LEB-10XSee October 12, 2010Narrative Responses0.05 to 0.2 qt/1000 galSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Slickwater Shale GBL-8XSee October 12, 2010Narrative Responses0.05 to 0.2 qt/1000 gal See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Slickwater Shale O2 ScavengerSee October 12, 2010Narrative Responses0.1 to 0.5 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050CBI?Hercules Plaza 1313 North Market StreetWilmington, DE 19894100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056CBI?Address1004 S. Plainsman Road Marlow, OK 730551 Chemical Plant Road Box 250, Riceboro, GA31323Person Who Sold the Product and/or Constituents100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056Rationale for SiteRequirements100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 150561004 S. Plainsman Road Marlow, OK 730557705 Highway 90-A Sugar Land, TX 77478100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056Table 4. Formulation/Mixture SpecificationsCBI? CBI?Formulation/MixtureNameConstituentQuantity of Constituentused in HydraulicFracturing (pleasespecify units)Concentration ofConstituent as Injected(please indicate units)Specifications to Meet SiteRequirementsCBI? CBI?Manufacturer ofProduct and/orConstituentsYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesNarrative ResponsesNarrative ResponsesNarrative ResponsesChemistrySlickwater Shale Adomite AquaSee October 12, 2010Narrative Responses50 to 200 lb per stageSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesNalco Nalco281-263-7000Slickwater ShaleAdomite Regain (FLC-100)See October 12, 2010Narrative Responses50 to 200 lb per stageSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesNalco Nalco281-263-7000Slickwater Shale NCLSee October 12, 2010Narrative Responses2 to 3 gptSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Slickwater Shale Resin Coated SandSee October 12, 2010Narrative Responses1 to 5 lb per gallonSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesSantrol, Inc Santrol, Inc281-431-0670Slickwater Shale Ceramic ProppantSee October 12, 2010Narrative Responses1 to 5 lb per gallonSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesCarbo Ceramics Carbo Ceramics281-921-6400Slickwater Shale API Frac SandSee October 12, 2010Narrative Responses0.1 to 4 lb per gallonSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesVariousSee October 12, 2010 NarrativeResponsesHigh Volume CBI? Average Volume CBI? Low VolumeCBI?Slickwater Shale Refer to responseprovided under"Range of TotalFluid Injected."See October 12, 2010Narrative ResponsespH: 5 to 8, Temperature:32 to 100F, Chlorides: <50,000 mg/l, Iron: < 50mg/l, sulfates: < 50 mg/l300,000 to 500,000 gal perstage; 8 to 16 stages perwellSee October 12, 2010Narrative ResponsesSee October 12, 2010Question 3 AddendumSee October 12, 2010 Question 3AddendumSee October 12,2010 Question 3AddendumEnergy Center II, 575 N. Dairy Ashford Suite300 Houston, TX 77079PO Box 639 Fresno, TX 77545CBI?Geological Factors Associated with Low, Average, High Volumes Injected (Type of Geologic Media, Depthof Job,Extent of Fracturing Desired)7705 Highway 90-A Sugar Land, TX 774787705 Highway 90-A Sugar Land, TX 77478100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056Leetsdale, PA 15056CBI? CBI?Range of Total FluidInjected(Low to High)(gallons)Formulation/MixtureNameQuantity of WaterUsed(gallons)Incoming WaterSourceQuality of WaterTable 5. Formulation/Mixture/Water SpecificationsAverage Volume ofTotal Fluid Injected(gallons)CBI? CBI?YesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)NitrogenFormulation/ MixtureNameChemical Name (UseIUPACNomenclature)CBI? Chemical Formula CBI?Chemical AbstractSystem (CAS) NumberCBI?Purpose of Chemical inHydraulic Fracturing FluidFormulation/MixtureCBI?Concentration asDelivered to Site(please indicate units)CBI?How was theConcentrationDetermined?CBI?Indicate Analytical Method used toDetermine Concentration (includeanalytical preparation methodwhere applicable)CBI?Is the MSDSAttached?Nitrogen Nitrogen Nitrogen 7727-37-9Gas Fracturing Fluid100%None AvailableNitrogen Flomax 50 (CESI)isopropanol, citrusterpenes67-63-0, 94266-47-41-15%, 1-15%None AvailableNitrogenFlomax 50(Clearwater)alcohol ethoxylated (C8C10 4.5 mol), isopropylalcohol, ethylene glycol68439-45-2, 67-63-0, 107-21-110-30%, 10-30%, 7-13%None AvailableNitrogen BioClear 10002,2-dibromo-3-nitrilopropionamide10222-01-297.6%None AvailableNitrogen Cla-Chek LP ethylene glycol 107-21-130-60%None AvailableHydraulic FracturingFormulation/Mixture Specific QuestionsFORMULATION / MIXTURE SPECIFIC QUESTIONSPlease provide information on all constituents in the formulation/mixture. If Material Safety Data Sheets (MSDSs) are available, please attach them to your submittal.Formulation/Mixture Name:Table 1. Chemical ConstituentsCalculatedNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoOther, specify:SelectSelectSelectSelectAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesCalculatedAnalyticallyClay controlYesYesYesYesYesYesCalculatedAnalyticallyBiocideYesYesYesYesYesYesCalculatedAnalyticallySelectYesYesYesYesYesYesSurfactantYesYesYesYesCalculatedAnalyticallyYesNoSelectYesYesYesYesYesYesYesCalculatedAnalyticallySelectYesYesYesYesYesYesSurfactantYesYesYesYesYesYesYesYesNitrogenNitrogenNitrogenFormulation/MixtureNameChemical NoneAvailablemeCBI?Solubility in Water(mg L-1)Viscosity (cP)and SpecifyTemperatureVapor Pressure(acceptableunits atm, bar,Pa, mm Hg)Other(pleasespecify)NitrogenNitrogenNone Available None Available None AvailableNone AvailableNitrogenFlomax 50 (CESI)"69-79%" None Available None Available None AvailableNitrogenFlomax 50(Clearwater)None Available None Available None Available None AvailableNitrogenBioClear 1000"1.5%" None Available None Available None AvailableNitrogenCla-Chek LPNone Available None Available None Available None AvailableNone AvailableNone AvailableTable 2. Chemical and Physical Properties of Chemical ConstituentsPlease provide the chemical and physical propertiesof the chemical constituents listed in Table 1 above.Octanol- Water PartitionCoefficient KowNone AvailableOrganic Carbon-Water PartitionCoefficient KOC(L kg-1)None Available None Available None AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableDensity(g cm3or g mL-1)None Available1.056None AvailableKH(acceptable units atm L mol1or bar L mol-1or Pa L mol-1oratm m3mol-1or bar m3mol-1orPa m3mol-1)None AvailableNone AvailableNone AvailableNone AvailableNone AvailableDistribution Coefficient Kd(L kg-1)None AvailableNone AvailableNone AvailableMolar Mass(g mol-1)28.020.9951.045CalculatedNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoOther, specify:SelectSelectSelectSelectSelectSelectAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesCalculatedAnalyticallyClay controlYesYesYesYesYesYesCalculatedAnalyticallyBiocideYesYesYesYesYesYesCalculatedAnalyticallySelectYesYesYesYesYesYesSurfactantYesYesYesYesCalculatedAnalyticallyYesNoSelectYesYesYesYesYesYesYesCalculatedAnalyticallySelectYesYesYesYesYesYesSurfactantYesYesYesYesYesYesYesYesYesNitrogenCalculatedNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoOther, specify:SelectSelectSelectSelectSelectSelectAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesCalculatedAnalyticallyClay controlYesYesYesYesYesYesCalculatedAnalyticallyBiocideYesYesYesYesYesYesCalculatedAnalyticallySelectYesYesYesYesYesYesSurfactantYesYesYesYesCalculatedAnalyticallyYesNoSelectYesYesYesYesYesYesYesCalculatedAnalyticallySelectYesYesYesYesYesYesSurfactantYesYesYesYesYesYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)Nitrogen0Nitrogen0Nitrogen0Formulation/MixtureNameProppant Name CBI?ProppantSpecificationsCBI?Is the Proppant ResinCoated?CBI?Specify the Resin CoatingMaterials UsedCBI?Nitrogen Not ApplicableNitrogenNitrogenNitrogenNitrogenNitrogenTable 3. Proppant ConstituentsPlease provide the chemical and physical propertiesof the proppants listed in Table 1 above.YesYesNoYesNoYesNoYesNoYesNoNoYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesNitrogenYesYesNoYesNoYesNoYesNoYesNoYesNoNoYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)NameTelephoneNumberCBI?Nitrogen NitrogenSee October 12, 2010Narrative Responses100% except whiledropping frac ballsSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesVariousSee October 12, 2010 NarrativeResponsesNitrogen Flomax 50 (CESI)See October 12, 2010Narrative Responses2 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesCESI Chemical CESI Chemical580-658-6608NitrogenFlomax 50(Clearwater)See October 12, 2010Narrative Responses2 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Nitrogen BioClear 1000See October 12, 2010Narrative Responses2 lb/500 bbl See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Nitrogen Cla-Chek LPSee October 12, 2010Narrative Responses0.5 to 1 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Nitrogen0Nitrogen0Nitrogen0NitrogenNitrogen0Nitrogen0CBI? CBI?Specifications to Meet SiteRequirementsRationale for SiteRequirementsFormulation/MixtureNameConstituentQuantity of Constituentused in HydraulicFracturing (pleasespecify units)Concentration ofConstituent as Injected(please indicate units)Manufacturer ofProduct and/orConstituentsCBI? CBI? CBI?100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056Table 4. Formulation/Mixture Specifications100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056CBI?Address1004 S. Plainsman Road Marlow, OK 73055Person Who Sold the Product and/or ConstituentsYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesNitrogen0Nitrogen0Nitrogen0Nitrogen0High Volume CBI? Average Volume CBI? Low VolumeCBI?NitrogenRefer to responseprovided under"Range of TotalFluid Injected."See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative Responses200 to 2,000 gal per stage;9 to 25 stages per wellSee October 12, 2010Narrative ResponsesSee October 12, 2010Question 3 AddendumSee October 12, 2010 Question 3AddendumSee October 12,2010 Question 3AddendumFormulation/MixtureNameQuantity of WaterUsed(gallons)Incoming WaterSourceQuality of WaterRange of Total FluidInjected(Low to High)(gallons)Average Volume ofTotal Fluid Injected(gallons)CBI? CBI? CBI? CBI?Table 5. Formulation/Mixture/Water SpecificationsCBI?Geological Factors Associated with Low, Average, High Volumes Injected (Type of Geologic Media, Depthof Job,Extent of Fracturing Desired)YesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)CrosslinkFormulation/ MixtureNameChemical Name (UseIUPACNomenclature)CBI? Chemical Formula CBI?Chemical AbstractSystem (CAS) NumberCBI?Purpose of Chemical inHydraulic Fracturing FluidFormulation/MixtureCBI?Concentration asDelivered to Site(please indicate units)CBI?How was theConcentrationDetermined?CBI?Indicate Analytical Method used toDetermine Concentration (includeanalytical preparation methodwhere applicable)CBI?Is the MSDSAttached?Crosslink Unigel 19XL guar gum None Available> 95%None AvailableCrosslink Unilink 8.5ethylene glycol, boricacid,proprietarycomponent107-21-1, 10043-35-3,Proprietary15-40%, 3-7%, 15-40%None AvailableCrosslink Flomax 50 (CESI)isopropanol, citrusterpenes67-63-0, 94266-47-41-15%, 1-15%None AvailableCrosslinkFlomax 50(Clearwater)alcohol ethoxylated (C8C10 4.5 mol), isopropylalcohol, ethylene glycol68439-45-2, 67-63-0, 107-21-110-30%, 10-30%, 7-13%None AvailableCrosslink LEB-10X ethylene glycol 107-21-130-60%None AvailableCrosslink GBL-8X None Available None AvailableNone AvailableNone AvailableCrosslinkSuperSurfmethanol67-56-130-60%None AvailableHydraulic FracturingFormulation/Mixture Specific QuestionsFORMULATION / MIXTURE SPECIFIC QUESTIONSPlease provide information on all constituents in the formulation/mixture. If Material Safety Data Sheets (MSDSs) are available, please attach them to your submittal.Formulation/Mixture Name:Table 1. Chemical ConstituentsCalculatedNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoSelectCross-linkerSelectSelectSelectSelectAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoGelling agentYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoSelectYesYesYesYesYesYesYesSurfactantYesYesYesYesCalculatedCalculatedAnalyticallySelectSelectAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesBreaker fluidYesYesYesYesBreaker fluidYesYesYesYesCalculatedSurfactantAnalyticallyYesYesYesYesYesYesCalculatedAnalyticallyYesNoSelectYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoSelectYesYesYesYesYesYesYesSurfactantYesYesYesYesYesYesYesYesYesYesYesYesCrosslinkSuperSurfmethanol67-56-130-60%None AvailableCrosslink Cla-Chek LP ethylene glycol 107-21-130-60%None AvailableCrosslink NE-50isopropyl alcohol,methanol67-63-0, 67-56-1Non-emulsifier30-60%, 10-30%None AvailableCrosslink NE-90methanol, heavyaromatic naphtha,polyethylene glycol,isopropanol, (EO-C7-9-67-56-1, 64742-94-5,25322-68-3, 67-63-0,78330-19-5, 78330-20-8,104-76-7, 91-20-3Non-emulsifier30-60%, 1-5%, 1-5%, 5-10%, 1-5%, 1-5%, 5-10%, 0.1-1%None AvailableCrosslink Soda Ash sodium carbonate 497-19-8None AvailableNone AvailableCrosslink ALPHA 3385(solvent naptha,petroleum aromatic),(poly(oxy-1,ethanediyl),a-(nonylphenol)-w-hydroxy64742-94-5, 51811-79-1,91-20-3Sand Control65-100%, 30-60%, 3-7%None AvailableCrosslink API Frac Sandcrystalline silica (quartz),aluminum oxide, ironoxide, titanium oxide14808-60-7, 1344-28-1,1309-37-1, 13463-67-799.0-99.9%, <0.8%,<0.1%, <0.1%None AvailableCrosslink BioClear 10002,2-dibromo-3-nitrilopropionamide10222-01-297.6%None AvailableCrosslink NCL ethylene glycol 107-21-130-60%None AvailableCalculatedNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoSelectCross-linkerSelectSelectSelectSelectSelectAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoSelectSelectpH controlSelectYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoSelectYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoGelling agentYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoSelectYesYesYesYesYesYesYesSurfactantYesYesYesYesCalculatedCalculatedAnalyticallySelectSelectAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesBreaker fluidYesYesYesYesBreaker fluidYesYesYesYesCalculatedSurfactantAnalyticallyYesYesYesYesYesYesCalculatedAnalyticallyClay controlYesYesYesYesYesYesCalculatedAnalyticallyOther, specify:YesYesYesYesYesYesCalculatedOther, specify:AnalyticallyYesYesYesYesYesYesCalculatedAnalyticallyOther, specify:YesYesYesYesYesYesCalculatedProppantAnalyticallyYesYesYesYesYesYesCalculatedAnalyticallyYesNoSelectYesYesYesYesYesYesYesCalculatedProppantAnalyticallyYesYesYesYesYesYesCalculatedAnalyticallyBiocideYesYesYesYesYesYesCalculatedAnalyticallyYesNoSelectYesYesYesYesYesYesYesCalculatedProppantAnalyticallyYesYesYesYesYesYesCalculatedAnalyticallyBiocideYesYesYesYesYesYesCalculatedAnalyticallyClay controlYesYesYesYesYesCalculatedAnalyticallyYesNoSelectYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoSelectYesYesYesYesYesYesYesSurfactantYesYesYesYesYesYesYesYesYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)Formulation/MixtureNameChemical Name CBI?Solubility in Water(mg L-1)Viscosity (cP)and SpecifyTemperatureVapor Pressure(acceptableunits atm, bar,Pa, mm Hg)Other(pleasespecify)CrosslinkUnigel 19XL"gels" None Available None Available None AvailableCrosslinkUnilink 8.5None Available None Available None AvailableNone AvailableCrosslinkFlomax 50 (CESI)"69-79%" None Available None Available None AvailableCrosslinkFlomax 50(Clearwater)None Available None Available None Available None AvailableCrosslinkLEB-10XNone Available None Available None Available None AvailableCrosslinkGBL-8X"Complete" None Available None Available None AvailableCrosslinkSuperSurfNone Available None Available None Available None AvailableCrosslinkCla-Chek LPNone Available None Available None Available None AvailableCrosslinkNE-50None Available None Available None AvailableNone AvailableCrosslinkNE-90"dispersible" "7 cst @ 100F" None AvailableNone AvailableSoda Ash"17% solution @None AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone Available2.533None Available None AvailableNone AvailableNone AvailableNone Available None Available None Available None Available None Available 0.881.2051.1000.9751.045None Available None Available None Available 0.8949None AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone Available1.056None AvailableNone Available None Available 0.995None AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableDistribution Coefficient Kd(L kg-1)None AvailableKH(acceptable units atm L mol1or bar L mol-1or Pa L mol-1oratm m3mol-1or bar m3mol-1orPa m3mol-1)None AvailableDensity(g cm3or g mL-1)None AvailableMolar Mass(g mol-1)None Available1.105None AvailableNone AvailableNone AvailableNone AvailableOrganic Carbon-Water PartitionCoefficient KOC(L kg-1)None AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableOctanol- Water PartitionCoefficient KowNone AvailableTable 2. Chemical and Physical Properties of Chemical ConstituentsPlease provide the chemical and physical propertiesof the chemical constituents listed in Table 1 above.None AvailableNone AvailableYesYesYesYesYesYesYesYesYesYesYesCrosslinkSoda Ash"17% solution @20C"None AvailableNone AvailableNone AvailableCrosslinkALPHA 3385None Available None Available None Available None AvailableCrosslinkAPI Frac Sand"Insoluble" None Available None Available None AvailableCrosslinkBioClear 1000"1.5%" None Available None Available None AvailableCrosslinkNCLNone Available None Available None AvailableNone AvailableFormulation/MixtureNameProppant Name CBI?ProppantSpecificationsCBI?Is the Proppant ResinCoated?CBI?Specify the Resin CoatingMaterials UsedCBI?Crosslink API Frac Sand 16/30, 20/40, 30/50Not ApplicableCrosslinkCrosslinkCrosslinkCrosslinkCrosslinkCrosslinkNone AvailableNone AvailableNone Available None Available None Available1.045None Available 2.65None Available None AvailableNone Available None AvailableNone AvailableNone Available None Available None Available None AvailableNone Available None Available None AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone Available2.533None Available 0.975None AvailableNone AvailableTable 3. Proppant ConstituentsPlease provide the chemical and physical propertiesof the proppants listed in Table 1 above.YesYesNoYesNoYesNoYesNoYesNoYesNoNoYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesCrosslinkYesYesNoYesNoYesNoYesNoYesNoYesNoNoYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)NameTelephoneNumberCBI?Crosslink Unigel 19XLSee October 12, 2010Narrative Responses15 to 40 lb per 1000 galSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesHercules Incorporated Hercules Incorporated302-594-5000Crosslink Unilink 8.5See October 12, 2010Narrative Responses2 to 3 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Crosslink Flomax 50 (CESI)See October 12, 2010Narrative Responses2 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesCESI Chemical CESI Chemical580-658-6608CrosslinkFlomax 50(Clearwater)See October 12, 2010Narrative Responses2 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Crosslink LEB-10XSee October 12, 2010Narrative Responses0.05 to 0.4 qt per 1000 galSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Crosslink GBL-8XSee October 12, 2010Narrative Responses0.05 to 0.4 qt per 1000 galSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesCESI Chemical CESI Chemical580-658-6608Crosslink SuperSurfSee October 12, 2010Narrative Responses0.5 to 1 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Crosslink Cla-Chek LPSee October 12, 2010Narrative Responses0.5 to 1 gptSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Crosslink NE-50See October 12, 2010Narrative Responses0.5 to 1 gptSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Crosslink NE-90See October 12, 2010Narrative Responses0.5 to 1 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesNalco Nalco281-263-7000Crosslink Soda AshSee October 12, 2010Narrative Responses3 to 10 lb per 1000 galSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Crosslink ALPHA 3385See October 12, 2010Narrative Responses1.5 gal per 1000 lbproppantSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Crosslink API Frac SandSee October 12, 2010Narrative Responses2 to 10 lb per gallonSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesVariousSee October 12, 2010 NarrativeResponsesSee October 12, 20102 lb per 500 bblSee October 12, 2010See October 12, 2010Clearwater Engineered100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056100 Leetsdale Industrial Drive, Suite A100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056CBI?AddressHercules Plaza 1313 North Market StreetWilmington, DE 19894100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056CBI? CBI? CBI? CBI? CBI?Specifications to Meet SiteRequirementsRationale for SiteRequirementsPerson Who Sold the Product and/or Constituents7705 Highway 90-A Sugar Land, TX 77478100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056Table 4. Formulation/Mixture Specifications1004 S. Plainsman Road Marlow, OK 730551004 S. Plainsman Road Marlow, OK 73055100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056Formulation/MixtureNameConstituentQuantity ofConstituent used inHydraulic Fracturing(please specify units)Concentration ofConstituent as Injected(please indicate units)Manufacturer ofProduct and/orConstituentsYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesCrosslink BioClear 1000See October 12, 2010Narrative Responses2 lb per 500 bblSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Crosslink NCLSee October 12, 2010Narrative Responses2-3 gptSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050High Volume CBI? Average Volume CBI? Low VolumeCBI?CrosslinkRefer to responseprovided under"Range of TotalFluid Injected"See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative Responses10,000 to 50,000 gal perstage; 1 to 5 stages perwellSee October 12, 2010Narrative ResponsesSee October 12, 2010Question 3 AddendumSee October 12, 2010 Question 3AddendumSee October 12,2010 Question 3Addendum100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056CBI?Geological Factors Associated with Low, Average, High Volumes Injected (Type of Geologic Media, DepthofJob, Extent of Fracturing Desired)Table 5. Formulation/Mixture/Water Specifications100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056Formulation/MixtureNameQuantity of WaterUsed(gallons)Incoming WaterSourceQuality of WaterRange of Total FluidInjected(Low to High)(gallons)Average Volume ofTotal Fluid Injected(gallons)CBI? CBI? CBI? CBI?YesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy, Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)Gelled Water forOpenhole Wells- Oilor GasFormulation/ MixtureNameChemical Name (UseIUPACNomenclature)CBI? Chemical Formula CBI?Chemical AbstractSystem (CAS) NumberCBI?Purpose of Chemical inHydraulic Fracturing FluidFormulation/MixtureCBI?Concentration asDelivered to Site(please indicate units)CBI?How was theConcentrationDetermined?CBI?Indicate Analytical Method used toDetermine Concentration (includeanalytical preparation methodwhere applicable)CBI?Is the MSDSAttached?Gelled Water forOpenhole Wells- Oil orGasUniflo IIdocecylbenzene sulfonicacid, glycol ethers,isopropyl alcohol27176-87-0, 111-76-2, 67-63-05-10%, 3-7%, 15-40%None AvailableGelled Water forOpenhole Wells- Oil orGasCla-Chek A ethylene glycol 107-21-140-70%None AvailableGelled Water forOpenhole Wells- Oil orGasNE-50isopropyl alcohol,methanol67-63-0, 67-56-1Non-emulsifier30-60%, 10-30%None AvailableGelled Water forOpenhole Wells- Oil orGasNE-90methanol, heavyaromatic naphtha,polyethylene glycol,isopropanol, (EO-C7-9-67-56-1, 64742-94-5,25322-68-3, 67-63-0,78330-19-5, 78330-20-8,104-76-7, 91-20-3Non-emulsifier30-60%, 1-5%, 1-5%, 5-10%, 1-5%, 1-5%, 5-10%, 0.1-1%None AvailableGelled Water forOpenhole Wells- Oil orGasUnigel 19XL guar gum None Available> 95%None AvailableHydraulic FracturingFormulation/Mixture Specific QuestionsFORMULATION / MIXTURE SPECIFIC QUESTIONSPlease provide information on all constituents in the formulation/mixture. If Material Safety Data Sheets (MSDSs) are available, please attach them to your submittal.Formulation/Mixture Name:Table 1. Chemical ConstituentsCalculatedNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoSurfactantClay controlSelectSelectSelectAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesCalculatedAnalyticallySelectYesYesYesYesYesYesCalculatedAnalyticallyOther, specify:YesYesYesYesYesYesCalculatedAnalyticallySelectYesYesYesYesYesYesCalculatedOther, specify:AnalyticallyYesYesYesYesYesYesCalculatedSelectAnalyticallyYesYesYesYesYesYesCalculatedAnalyticallyGelling agentYesYesYesYesYesYesGasGelled Water forOpenhole Wells- Oil orGasUnigel 5F guar gum None Available> 95%None AvailableGelled Water forOpenhole Wells- Oil orGasICA-1 citric acid 77-92-990-100%None AvailableGelled Water forOpenhole Wells- Oil orGasLEB-10X ethylene glycol 107-21-130-60%None AvailableGelled Water forOpenhole Wells- Oil orGasGBL-8X None Available None AvailableNone AvailableNone AvailableGelled Water forOpenhole Wells- Oil orGasBenzoic Acid Flakes Benzoic Acid 65-85-0diverting agentNone AvailableNone AvailableGelled Water forOpenhole Wells- Oil orGasAPI Frac Sandcrystalline silica (quartz),aluminum oxide, ironoxide, titanium oxide14808-60-7, 1344-28-1,1309-37-1, 13463-67-799.0-99.9%, <0.8%,<0.1%, <0.1%None AvailableCalculatedNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoSurfactantClay controlSelectSelectSelectSelectIron controlAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoSelectSelectOther, specify:SelectYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesCalculatedAnalyticallySelectYesYesYesYesYesYesCalculatedAnalyticallyOther, specify:YesYesYesYesYesYesCalculatedAnalyticallySelectYesYesYesYesYesYesCalculatedOther, specify:AnalyticallyYesYesYesYesYesYesCalculatedSelectAnalyticallyYesYesYesYesYesYesCalculatedAnalyticallyGelling agentYesYesYesYesYesYesCalculatedAnalyticallyGelling agentYesYesYesYesYesYesCalculatedAnalyticallyCalculatedAnalyticallySelectSelectYesYesYesYesYesYesYesYesYesYesYesYesCalculatedCalculatedAnalyticallySelectSelectAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesBreaker fluidYesYesYesYesBreaker fluidYesYesYesYesCalculatedAnalyticallySelectYesYesYesYesYesYesCalculatedProppantAnalyticallyYesYesYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy, Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)Formulation/MixtureNameChemical Name CBI?Solubility in Water(mg L-1)Viscosity (cP) andSpecifyTemperatureVapor Pressure(acceptableunits atm, bar,Pa, mm Hg)Other(pleasespecify)Gelled Water forOpenhole Wells- Oil orGasUniflo IINone Available None Available None AvailableNone AvailableGelled Water forOpenhole Wells- Oil orGasCla-Chek ANone Available None Available None AvailableNone AvailableGelled Water forOpenhole Wells- Oil orGasNE-50None Available None Available None AvailableNone AvailableGelled Water forOpenhole Wells- Oil orGasNE-90"dispersible" "7 cst @ 100F" None AvailableNone AvailableGelled Water forOpenhole Wells- Oil orGasUnigel 19XL"gels" None Available None Available None AvailableGelled Water forOpenhole Wells- Oil orGasUnigel 5F"gels" None Available None Available None AvailableGelled Water forOpenhole Wells- Oil orGasICA-1576000 None Available None AvailableNone AvailableGelled Water forOpenhole Wells- Oil orGasLEB-10XNone Available None Available None Available None AvailableGelled Water forOpenhole Wells- Oil orGasGBL-8X"Complete" None Available None Available None AvailableGelled Water for Benzoic Acid Flakes"Slight (0.3%)" None Available "negligible @None AvailableTable 2. Chemical and Physical Properties of Chemical ConstituentsPlease provide the chemical and physical propertiesof the chemical constituents listed in Table 1 above.-1.72 @ 20COctanol- Water PartitionCoefficient KowNone AvailableNone Available None Available None AvailableNone Available 1.205None AvailableNone Available None AvailableNone Available None Available None AvailableNone Available None Available None Available1.100None Available 1.32None AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone Available None AvailableDensity(g cm3or g mL-1)0.9651.0520.89490.88Organic Carbon-Water PartitionCoefficient KOC(L kg-1)None AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableMolar Mass(g mol-1)None AvailableNone AvailableNone AvailableKH(acceptable units atm L mol1or bar L mol-1or Pa L mol-1oratm m3mol-1or bar m3mol-1orPa m3mol-1)None AvailableNone AvailableNone AvailableDistribution Coefficient Kd(L kg-1)None AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone Available1.542None AvailableNone AvailableNone AvailableYesYesYesYesYesYesYesYesYesYesGelled Water forOpenhole Wells- Oil orGasBenzoic Acid Flakes"Slight (0.3%)"None Available"negligible @20C)"None AvailableGelled Water forOpenhole Wells- Oil orGasAPI Frac Sand"Insoluble" None Available None Available None AvailableFormulation/MixtureNameProppant Name CBI?ProppantSpecificationsCBI?Is the Proppant ResinCoated?CBI?Specify the Resin CoatingMaterials UsedCBI?Gelled Water forOpenhole Wells- Oil orGasAPI Frac Sand 10/20, 16/30,20/40Not ApplicableGelled Water forOpenhole Wells- Oil orGasGelled Water forOpenhole Wells- Oil orGasGelled Water forOpenhole Wells- Oil orGasGelled Water forOpenhole Wells- Oil orGasGelled Water forOpenhole Wells- Oil orGasGelled Water forOpenhole Wells- Oil orGasNone AvailableTable 3. Proppant ConstituentsPlease provide the chemical and physical propertiesof the proppants listed in Table 1 above.None Available None AvailableNone AvailableNone AvailableNone Available None AvailableNone Available1.32None Available 2.65None AvailableYesYesNoYesNoYesNoYesNoYesNoYesNoNoYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy, Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)Gelled Water forOpenhole Wells- Oil orGasGelled Water forOpenhole Wells- Oil orGasGelled Water forOpenhole Wells- Oil orGasGelled Water forOpenhole Wells- Oil orGasNameTelephoneNumberCBI?Gelled Water forOpenhole Wells- Oil orUniflo IISee October 12, 2010Narrative Responses0.5 to 1 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Gelled Water forOpenhole Wells- Oil orCla-Chek ASee October 12, 2010Narrative Responses0.5 to 1 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Gelled Water forOpenhole Wells- Oil orNE-50See October 12, 2010Narrative Responses0.5 to 1 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Gelled Water forOpenhole Wells- Oil orNE-90See October 12, 2010Narrative Responses0.5 to 1 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesNalco Nalco281-263-7000Gelled Water forOpenhole Wells- Oil orGasUnigel 19XLSee October 12, 2010Narrative Responses5 to 20 lb per 1000 galSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesHercules Incorporated Hercules Incorporated302-594-5000Gelled Water forUnigel 5FSee October 12, 20105 to 20 lb per 1000 galSee October 12, 2010See October 12, 2010Hercules IncorporatedHercules Incorporated302-594-5000Rationale for SiteRequirementsCBI?Table 4. Formulation/Mixture SpecificationsCBI? CBI?Specifications to Meet SiteRequirementsFormulation/MixtureNameConstituentQuantity of Constituentused in HydraulicFracturing (pleasespecify units)Concentration ofConstituent as Injected(please indicate units)CBI?CBI?7705 Highway 90-A Sugar Land, TX 77478Manufacturer ofProduct and/orConstituentsHercules Plaza 1313 North Market Street100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056Hercules Plaza 1313 North Market StreetWilmington, DE 19894CBI?Address100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056Person Who Sold the Product and/or ConstituentsYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesNoYesNoYesNoYesNoYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesGelled Water forOpenhole Wells- Oil orUnigel 5FSee October 12, 2010Narrative Responses5 to 20 lb per 1000 galSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesHercules Incorporated Hercules Incorporated302-594-5000Gelled Water forOpenhole Wells- Oil orICA-1See October 12, 2010Narrative Responses1 to 10 lb per 1000 galSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Gelled Water forOpenhole Wells- Oil orGasLEB-10XSee October 12, 2010Narrative Responses0.05 to 0.2 qt per 1000 galSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Gelled Water forOpenhole Wells- Oil orGBL-8XSee October 12, 2010Narrative Responses0.05 to 0.2 qt per 1000 gal See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesCESI Chemical CESI Chemical580-658-6608Gelled Water forOpenhole Wells- Oil orBenzoic Acid FlakesSee October 12, 2010Narrative Responses25 to 100 lb per stage See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Gelled Water forOpenhole Wells- Oil orGasAPI Frac SandSee October 12, 2010Narrative Responses0.25 to 3 lb per gallonSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesVariousSee October 12, 2010 Question 3AddendumGelled Water forOpenhole Wells- Oil or0Gelled Water forOpenhole Wells- Oil or0Gelled Water forOpenhole Wells- Oil orGas0High Volume CBI? Average Volume CBI? Low VolumeCBI?Gelled Water forOpenhole Wells- Oil orGasRefer to responseprovided under"Range of TotalFluid Injected"See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative Responses5,000 to 10,000 gal perstage; 5 to 30 stages perwellSee October 12, 2010Narrative ResponsesSee October 12, 2010Question 3 AddendumSee October 12, 2010 Question 3AddendumSee October 12,2010 Question 3AddendumFormulation/MixtureNameQuantity of WaterUsed(gallons)Incoming WaterSourceQuality of WaterTable 5. Formulation/Mixture/Water SpecificationsRange of Total FluidInjected(Low to High)(gallons)Average Volume ofTotal Fluid Injected(gallons)CBI? CBI? CBI? CBI?Hercules Plaza 1313 North Market StreetWilmington, DE 19894100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 150561004 S. Plainsman Road Marlow, OK 73055100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056CBI?Geological Factors Associated with Low, Average, High Volumes Injected (Type of Geologic Media, Depthof Job,Extent of Fracturing Desired)YesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesNoYesNoYesNoYesNoYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesNoYesNoYesNoYesNoYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)Gelled Water forShallow Gas Wellswith Nitrogen AssistFormulation/ MixtureNameChemical Name (UseIUPACNomenclature)CBI? Chemical Formula CBI?Chemical AbstractSystem (CAS) NumberCBI?Purpose of Chemical inHydraulic Fracturing FluidFormulation/MixtureCBI?Concentration asDelivered to Site(please indicate units)CBI?How was theConcentrationDetermined?CBI?Indicate Analytical Method used toDetermine Concentration (includeanalytical preparation methodwhere applicable)CBI?Is the MSDSAttached?Gelled Water forShallow Gas Wells withNitrogen AssistUnigel 19XL guar gum None Available> 95%None AvailableGelled Water forShallow Gas Wells withNitrogen AssistUnigel 5F guar gum None Available> 95%None AvailableGelled Water forShallow Gas Wells withNitrogen AssistUnigel 2XL guar gum None Available> 95%None AvailableGelled Water forShallow Gas Wells withNitrogen AssistUnigel 1XLR hydroxypropyl guar 39421-75-5> 95%None AvailableGelled Water forShallow Gas Wells withFRP-121None AvailableNone AvailableNone AvailableNone AvailableTable 1. Chemical ConstituentsHydraulic FracturingFormulation/Mixture Specific QuestionsFORMULATION / MIXTURE SPECIFIC QUESTIONSPlease provide information on all constituents in the formulation/mixture. If Material Safety Data Sheets (MSDSs) are available, please attach them to your submittal.Formulation/Mixture Name:CalculatedNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoSelectSelectSelectSelectSelectAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesGelling agentGelling agentGelling agentGelling agentFriction reducerShallow Gas Wells withNitrogen AssistFRP-121None AvailableNone AvailableNone AvailableNone AvailableGelled Water forShallow Gas Wells withNitrogen AssistNitrogen Nitrogen 7727-37-9Gas Fracturing Fluid100%None AvailableGelled Water forShallow Gas Wells withNitrogen AssistSuperSurf methanol 67-56-130-60%None AvailableGelled Water forShallow Gas Wells withNitrogen AssistIron Sta IIC ethylene glycol 107-21-110-30%None AvailableGelled Water forShallow Gas Wells withNitrogen AssistCla-Chek LP ethylene glycol 107-21-130-60%None AvailableGelled Water forShallow Gas Wells withNitrogen AssistFlomax 50 (CESI)isopropanol, citrusterpenes67-63-0, 94266-47-41-15%, 1-15%None AvailableGelled Water forShallow Gas Wells withNitrogen AssistFlomax 50(clearwater)alcohol ethoxylated (C8C10 4.5 mol), isopropylalcohol, ethylene glycol68439-45-2, 67-63-0, 107-21-110-30%, 10-30%, 7-13%None AvailableGelled Water forShallow Gas Wells withNitrogen AssistGBL-8X None Available None AvailableNone AvailableNone AvailableGelled Water forShallow Gas Wells withNitrogen AssistLEB-10X ethylene glycol 107-21-130-60%None AvailableGelled Water forCalculatedNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoSelectSelectSelectSelectSelectSelectSelectAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoSelectSelectSelectSelectSelectSelectYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesGelling agentGelling agentGelling agentGelling agentFriction reducerOther, specify:SurfactantIron controlClay controlSurfactantBreaker fluidBreaker fluidSurfactantCalculatedAnalyticallyYesNoSelectYesYesYesYesYesYesYesSurfactantYesYesYesYesYesYesYesYesYesYesYesYesGelled Water forShallow Gas Wells withNitrogen AssistUniflo Isopropyl alcohol 67-63-040-70%None AvailableCalculatedNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoSelectSelectSelectSelectSelectSelectSelectAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoSelectSelectSelectSelectSelectSelectYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesGelling agentGelling agentGelling agentGelling agentFriction reducerOther, specify:SurfactantIron controlClay controlSurfactantBreaker fluidBreaker fluidSurfactantCalculatedAnalyticallyYesNoSelectYesYesYesYesYesYesYesSurfactantYesYesYesYesYesYesYesYesYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)Gelled Water forShallow Gas Wells withNitrogen AssistBioclear 10002,2-dibromo-3-nitrilopropionamide10222-01-297.6%None AvailableGelled Water forShallow Gas Wells withNitrogen AssistAPI Frac Sandcrystalline silica (quartz),aluminum oxide, ironoxide, titanium oxide14808-60-7, 1344-28-1,1309-37-1, 13463-67-799.0-99.9%, <0.8%,<0.1%, <0.1%None AvailableFormulation/MixtureNameChemical Name CBI?Solubility in Water(mg L-1)Viscosity (cP)and SpecifyTemperatureVapor Pressure(acceptableunits atm, bar,Pa, mm Hg)Other(pleasespecify)Gelled Water forShallow Gas Wells withNitrogen AssistUnigel 19XL"gels" None Available None Available None AvailableGelled Water forShallow Gas Wells withNitrogen AssistUnigel 5F"gels" None Available None Available None AvailableGelled Water forShallow Gas Wells withNitrogen AssistUnigel 2XL"gels" None Available None Available None AvailableGelled Water forShallow Gas Wells withNitrogen AssistUnigel 1XLR"gels" None Available None Available None AvailableGelled Water forShallow Gas Wells withNitrogen AssistFRP-121"completelymiscible"None Available None AvailableNone AvailableGelled Water forShallow Gas Wells withNitrogen AssistNitrogenNone Available None Available None AvailableNone AvailableGelled Water forSuperSurfNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone Available0.975None AvailableNone Available28.02None AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableDensity(g cm3or g mL-1)None AvailableNone AvailableNone AvailableDistribution Coefficient Kd(L kg-1)KH(acceptable units atm L mol1or bar L mol-1or Pa L mol-1oratm m3mol-1or bar m3mol-1orPa m3mol-1)None AvailableOrganic Carbon-Water PartitionCoefficient KOC(L kg-1)Octanol- Water PartitionCoefficient KowNone Available None AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableTable 2. Chemical and Physical Properties of Chemical ConstituentsPlease provide the chemical and physical propertiesof the chemical constituents listed in Table 1 above.None AvailableMolar Mass(g mol-1)YesYesYesYesYesYesYesCalculatedAnalyticallyYesNoSelectYesYesYesYesYesYesYesCalculatedAnalyticallySelectYesYesYesYesYesYesCalculatedAnalyticallySelectYesYesYesYesYesYesCalculatedProppantAnalyticallyYesYesYesYesYesYesCalculatedAnalyticallyYesNoSelectYesYesYesYesYesYesYesBiocideCalculatedNoAnalyticallyYesYesYesYesYesYesYesGelled Water forShallow Gas Wells withNitrogen AssistSuperSurfNone AvailableNone AvailableNone AvailableNone AvailableGelled Water forShallow Gas Wells withNitrogen AssistIron Sta IICNone Available None Available None Available None AvailableGelled Water forShallow Gas Wells withNitrogen AssistCla-Chek LPNone Available None Available None Available None AvailableGelled Water forShallow Gas Wells withNitrogen AssistFlomax 50 (CESI)"69 - 79%" None Available None Available None AvailableGelled Water forShallow Gas Wells withNitrogen AssistFlomax 50(clearwater)None Available None Available None Available None AvailableGelled Water forShallow Gas Wells withNitrogen AssistGBL-8X"Complete" None Available None Available None AvailableGelled Water forShallow Gas Wells withNitrogen AssistLEB-10XNone Available None Available None Available None AvailableGelled Water forShallow Gas Wells withNitrogen AssistUnifloNone Available None Available None AvailableNone AvailableGelled Water forShallow Gas Wells withNitrogen AssistBioclear 1000"1.5%" None Available None Available None AvailableGelled Water forShallow Gas Wells withNitrogen AssistAPI Frac Sand"Insoluble" None Available None AvailableNone AvailableNone AvailableNone Available1.100None Available None Available None Available None Available None AvailableNone Available None Available None AvailableNone Available None Available None Available None Available None Available 0.9249None Available None Available None Available None Available None Available 0.995None Available None AvailableNone Available None Available None Available None Available None Available 2.65None Available None Available None Available None Available1.2051.220None Available None Available None Available 1.056None Available None Available None Available 1.045None Available None Available None Available None Available None AvailableNone Available0.975None AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableYesYesYesYesYesYesYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoSelectYesYesYesYesYesYesYesCalculatedAnalyticallySelectYesYesYesYesYesYesCalculatedAnalyticallySelectYesYesYesYesYesYesCalculatedProppantAnalyticallyYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoSelectYesYesYesYesYesYesYesBiocideCalculatedNoAnalyticallyYesYesYesYesYesYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)Formulation/MixtureNameProppant Name CBI?ProppantSpecificationsCBI?Is the Proppant ResinCoated?CBI?Specify the Resin CoatingMaterials UsedCBI?Gelled Water forShallow Gas Wells withNitrogen AssistAPI Frac Sand10/20 down to 70/140meshNot ApplicableGelled Water forShallow Gas Wells withNitrogen AssistGelled Water forShallow Gas Wells withNitrogen AssistGelled Water forShallow Gas Wells withNitrogen AssistGelled Water forShallow Gas Wells withNitrogen AssistGelled Water forShallow Gas Wells withNitrogen AssistGelled Water forShallow Gas Wells withNitrogen AssistTable 3. Proppant ConstituentsPlease provide the chemical and physical propertiesof the proppants listed in Table 1 above.YesYesNoYesNoYesNoYesNoYesNoYesNoNoYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)NameTelephoneNumberCBI?Gelled Water forShallow Gas Wells withUnigel 19XLSee October 12, 2010Narrative Responses10 to 30 lb/1000 gallons See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesHercules Incorporated Hercules Incorporated302-594-5000Gelled Water forShallow Gas Wells withUnigel 5FSee October 12, 2010Narrative Responses10 to 30 lb/1000 gallons See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesHercules Incorporated Hercules Incorporated302-594-5000Gelled Water forShallow Gas Wells withUnigel 2XLSee October 12, 2010Narrative Responses10 to 30 lb/1000 gallons See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesHercules Incorporated Hercules Incorporated302-594-5000Gelled Water forShallow Gas Wells withUnigel 1XLRSee October 12, 2010Narrative Responses10 to 30 lb/1000 gallons See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesHercules Incorporated Hercules Incorporated302-594-5000Gelled Water forShallow Gas Wells withNitrogen AssistFRP-121See October 12, 2010Narrative Responses3 to 7 lb/1000 gallonsSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesSNF INC SNF INC912-884-3366Gelled Water forShallow Gas Wells withNitrogenSee October 12, 2010Narrative Responses50000 to 100000 scfSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesVariousSee October 12, 2010 NarrativeResponsesGelled Water forShallow Gas Wells withSuperSurfSee October 12, 2010Narrative Responses0.5 to 1 gptSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Gelled Water forShallow Gas Wells withNitrogen AssistIron Sta IICSee October 12, 2010Narrative Responses0.5 to 2 gptSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Gelled Water forShallow Gas Wells withCla-Chek LPSee October 12, 2010Narrative Responses0.5 to 2 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Gelled Water forShallow Gas Wells withFlomax 50 (CESI)See October 12, 2010Narrative Responses2 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesCESI Chemical CESI Chemical580-658-6608Gelled Water forShallow Gas Wells withFlomax 50(clearwater)See October 12, 2010Narrative Responses2 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050CBI? CBI?Table 4. Formulation/Mixture SpecificationsHercules Plaze 1313 North Market StreetWilmington, DE 19894100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056Hercules Plaze 1313 North Market StreetWilmington, DE 19894Rationale for SiteRequirementsManufacturer ofProduct and/orConstituentsCBI? CBI? CBI?AddressHercules Plaze 1313 North Market StreetWilmington, DE 19894Hercules Plaze 1313 North Market StreetWilmington, DE 19894Person Who Sold the Product and/or Constituents100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 150561004 S. Plainsman Road Marlow, OK 73055PO Box 250 Riceboro, Georgia 31323Specifications to Meet SiteRequirementsFormulation/MixtureNameConstituentQuantity of Constituentused in HydraulicFracturing (pleasespecify units)Concentration ofConstituent as Injected(please indicate units)CBI?YesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesShallow Gas Wells with(clearwater)Narrative ResponsesNarrative ResponsesNarrative ResponsesChemistryClearwater Engineered Chemistry724-318-1050Gelled Water forShallow Gas Wells withNitrogen AssistGBL-8XSee October 12, 2010Narrative Responses0.05 to 0.2 qt / 1000gallonsSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesCESI Chemical CESI Chemical580-658-6608Gelled Water forShallow Gas Wells withLEB-10XSee October 12, 2010Narrative Responses0.05 to 0.2 qt / 1000gallonsSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Gelled Water forShallow Gas Wells withUnifloSee October 12, 2010Narrative Responses0.5 to 1 gptSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Gelled Water forShallow Gas Wells withBioclear 1000See October 12, 2010Narrative Responses2 lb / 500 bblSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Gelled Water forShallow Gas Wells withNitrogen AssistAPI Frac SandSee October 12, 2010Narrative Responses0.5 to 4 lb per gallonSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesVariousSee October 12, 2010 NarrativeResponsesHigh Volume CBI? Average Volume CBI? Low VolumeCBI?Gelled Water forShallow Gas Wells withNitrogen AssistRefer to responseprovided under"Range of TotalFluid Injected"See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative Responses5,000 to 50,000 gal perstage; 1 to 2 stages perwellSee October 12, 2010Narrative ResponsesSee October 12, 2010Question 3 AddendumSee October 12, 2010 Question 3AddendumSee October 12,2010 Question 3AddendumLeetsdale, PA 15056100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 150561004 S. Plainsman Road Marlow, OK 73055100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056CBI?Geological Factors Associated with Low, Average, High Volumes Injected (Type of Geologic Media, Depthof Job,Extent of Fracturing Desired)Table 5. Formulation/Mixture/Water SpecificationsFormulation/MixtureNameQuantity of WaterUsed(gallons)Incoming WaterSourceQuality of WaterRange of Total FluidInjected(Low to High)(gallons)Average Volume ofTotal Fluid Injected(gallons)CBI? CBI? CBI? CBI?YesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)FoamFormulation/ MixtureNameChemical Name (UseIUPACNomenclature)CBI? Chemical Formula CBI?Chemical AbstractSystem (CAS) NumberCBI?Purpose of Chemical inHydraulic Fracturing FluidFormulation/MixtureCBI?Concentration asDelivered to Site(please indicate units)CBI?How was theConcentrationDetermined?CBI?Indicate Analytical Method used toDetermine Concentration (includeanalytical preparation methodwhere applicable)CBI?Is the MSDSAttached?Foam Unigel 19XL guar gum None Available> 95%None AvailableFoam Unigel 5F guar gum None Available> 95%None AvailableFoam Unigel 2XL guar gum None Available> 95%None AvailableFoam Unigel 1XLR hydroxypropyl guar 39421-75-5> 95%None AvailableFoam FRP-121 None Available None AvailableNone AvailableNone AvailableFormulation/Mixture Specific QuestionsFORMULATION / MIXTURE SPECIFIC QUESTIONSPlease provide information on all constituents in the formulation/mixture. If Material Safety Data Sheets (MSDSs) are available, please attach them to your submittal.Hydraulic FracturingFormulation/Mixture Name:Table 1. Chemical ConstituentsCalculatedNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoSelectSelectSelectSelectSelectSelectAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesGelling agentGelling agentGelling agentGelling agentFriction reducerOther, specify:Foam Nitrogen Nitrogen 7727-37-9Gas Fracturing Fluid100%None AvailableFoam Unifoam Glycol Ethers 111-76-215-40%None AvailableFoam SuperSurf methanol 67-56-130-60%None AvailableFoam Flomax 50 (CESI)isopropanol, citrusterpenes67-63-0, 94266-47-41-15%, 1-15%None AvailableFoamFlomax 50(Clearwater)alcohol ethoxylated (C8C10 4.5 mol), isopropylalcohol, ethylene glycol68439-45-2, 67-63-0, 107-21-110-30%, 10-30%, 7-13%None AvailableFoam NCL ethylene glycol 107-21-130-60%None AvailableFoam LEB-10X ethylene glycol 107-21-130-60%None AvailableFoam Bioclear 10002,2-dibromo-3-nitrilopropionamide10222-01-297.6%None AvailableFoam NE-90Methanol, Isopropanol,Heavy Aromaticnaphtha, PolyethyleneGlycol, EO-C7-9-iso, C867-56-1, 67-63-0, 64742-94-5, 25322-68-3, 78330-19-5, 78330-20-8, 104-76-7, 91-20-3Non-Emulsifier30-60%, 1-5%, 1-5%, 5-10%, 1-5%, 1-5%, 5-10%, 0.1-1%None AvailableCalculatedNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoSelectSelectSelectSelectSelectSelectSelectAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesCalculatedNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoSelectSelectSelectSelectSelectSelectAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesGelling agentGelling agentGelling agentGelling agentFriction reducerOther, specify:Foaming agentSurfactantSurfactantClay controlBreaker fluidBiocideOther, specify:CalculatedNoAnalyticallyYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoSelectYesYesYesYesYesYesYesSurfactantYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesnaphtha, PolyethyleneGlycol, EO-C7-9-iso, C819-5, 78330-20-8, 104-76-7, 91-20-3Non-Emulsifier10%, 0.1-1%CalculatedNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoSelectSelectSelectSelectSelectSelectSelectAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesCalculatedNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoSelectSelectSelectSelectSelectSelectAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesGelling agentGelling agentGelling agentGelling agentFriction reducerOther, specify:Foaming agentSurfactantSurfactantClay controlBreaker fluidBiocideOther, specify:CalculatedNoAnalyticallyYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoSelectYesYesYesYesYesYesYesSurfactantYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)Foam GBL-8X None Available None AvailableNone AvailableNone AvailableFoam NE - 50Isopropyl alcohol,Methanol67-63-0, 67-56-1Non-Emulsifier30-60%, 10-30%None AvailableGelled Water forShallow Gas Wells withNitrogen AssistAPI Frac Sandcrystalline silica (quartz),aluminum oxide, ironoxide, titanium oxide14808-60-7, 1344-28-1,1309-37-1, 13463-67-799.0-99.9%, <0.8%,<0.1%, <0.1%None AvailableGelled Water forShallow Gas Wells withNitrogen AssistTransfoamisopropyl alcohol, glycolethers67-63-0, 111-76-215-40%, 3-7%None AvailableGelled Water Frac forShallow Gas Wells withNitrogen AssistCarbon Dioxide Carbon Dioxide 124-38-9Other: Gas Fracturing Fluid> 99%None AvailableFormulation/MixtureNameChemical Name CBI?Solubility in Water(mg L-1)Viscosity (cP)and SpecifyTemperatureVapor Pressure(acceptableunits atm, bar,Pa, mm Hg)Other(pleasespecify)FoamUnigel 19XL"gels" None Available None Available None AvailableFoamUnigel 5F"gels" None Available None Available None AvailableOctanol- Water PartitionCoefficient KowNone AvailableTable 2. Chemical and Physical Properties of Chemical ConstituentsPlease provide the chemical and physical propertiesof the chemical constituents listed in Table 1 above.Molar Mass(g mol-1)None AvailableNone AvailableKH(acceptable units atm L mol1or bar L mol-1or Pa L mol-1oratm m3mol-1or bar m3mol-1orPa m3mol-1)None AvailableOrganic Carbon-Water PartitionCoefficient KOC(L kg-1)None AvailableNone AvailableNone AvailableNone AvailableNone AvailableDensity(g cm3or g mL-1)None AvailableDistribution Coefficient Kd(L kg-1)None AvailableNone AvailableYesYesCalculatedAnalyticallyYesNoSelectYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoSelectYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesBreaker fluidSurfactantSelectOther, specify:CalculatedAnalyticallyYesNoSelectYesYesYesYesYesYesYesCalculatedAnalyticallySelectYesYesYesYesYesYesCalculatedAnalyticallySelectYesYesYesYesYesYesCalculatedProppantAnalyticallyYesYesYesYesYesYesCalculatedAnalyticallyYesNoSelectYesYesYesYesYesYesYesCalculatedAnalyticallySelectYesYesYesYesYesYesCalculatedAnalyticallySelectYesYesYesYesYesYesCalculatedFoaming agentAnalyticallyYesYesYesYesYesYesCalculatedAnalyticallyYesNoYesYesYesYesYesYesYesCalculatedAnalyticallyYesYesYesYesYesYesCalculatedAnalyticallyYesYesYesYesYesYesCalculatedAnalyticallyYesYesYesYesYesYesFoamUnigel 2XL"gels" None Available None Available None AvailableFoamUnigel 1XLR"gels" None Available None Available None AvailableFoamFRP-121"completelymiscible"None Available None AvailableNone AvailableFoamNitrogenNone Available None Available None AvailableNone AvailableFoamUnifoamNone Available None Available None AvailableNone AvailableFoamSuperSurfNone Available None Available None Available None AvailableFoamFlomax 50 (CESI)"69 - 79%" None Available None Available None AvailableFoamFlomax 50(Clearwater)None Available None Available None Available None AvailableFoamNCL None Available None Available None Available None Available None Available 1.0499None Available None Available None AvailableNone AvailableFoamLEB-10XNone Available None Available None Available None AvailableFoamBioclear 1000"1.5%" None Available None Available None AvailableNone Available None Available None AvailableNone AvailableNone AvailableNone Available None Available None Available None AvailableNone AvailableNone Available None AvailableNone AvailableNone AvailableNone AvailableNone Available1.205None Available None Available None Available0.995None AvailableNone Available None Available None Available None AvailableNone AvailableNone AvailableNone Available0.975None Available1.056None AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone Available None AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone Available28.02None AvailableNone AvailableNone AvailableNone Available1.0499YesYesYesYesYesYesYesCalculatedAnalyticallyYesNoSelectYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoSelectYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesBreaker fluidSurfactantSelectOther, specify:CalculatedAnalyticallyYesNoSelectYesYesYesYesYesYesYesCalculatedAnalyticallySelectYesYesYesYesYesYesCalculatedAnalyticallySelectYesYesYesYesYesYesCalculatedProppantAnalyticallyYesYesYesYesYesYesCalculatedAnalyticallyYesNoSelectYesYesYesYesYesYesYesCalculatedAnalyticallySelectYesYesYesYesYesYesCalculatedAnalyticallySelectYesYesYesYesYesYesCalculatedFoaming agentAnalyticallyYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoYesYesYesYesYesYesYesCalculatedAnalyticallyYesYesYesYesYesYesCalculatedAnalyticallyYesYesYesYesYesYesCalculatedAnalyticallyYesYesYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)FoamNE-90 None Available None Available None Available NoneAvailable None Available 0.88"Dispersible" "7 cst @ 100 F/38C"None AvailableNone AvailableFoamGBL-8X"Complete" None Available None Available None AvailableFoamNE - 50None Available None Available None Available None AvailableFoamAPI Frac Sand"Insoluble" None Available None AvailableNone AvailableFoamTransfoamNone Available None Available None AvailableNone AvailableFoam FracsCarbon Dioxide"0.90 vol/vol @ 68Fand 1 atm"None Available "838 psig @ 70F"None AvailableFormulation/MixtureNameProppant Name CBI?ProppantSpecificationsCBI?Is the Proppant ResinCoated?CBI?Specify the Resin CoatingMaterials UsedCBI?Foam API Frac Sand10/20 down to 70/140meshNot ApplicableFoamFoamFoamNone Available None AvailableNone AvailableNone AvailableNone Available None Available None AvailableNone Available None Available0.8949None Available None Available 1.0399None Available None Available None AvailableNone Available None Available None Available None AvailableTable 3. Proppant ConstituentsPlease provide the chemical and physical propertiesof the proppants listed in Table 1 above.2.65None AvailableNone Available1.10044.01 0.763None Available None Available None Available None AvailableYesYesNoYesNoYesNoNoYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesNoYesYesYesYesYesFoamFoamFoamYesYesNoYesNoYesNoYesNoYesNoYesNoNoYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesNoYesYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)NameTelephoneNumberCBI?Foam Unigel 19XLSee October 12, 2010Narrative Responses15 to 30 lb/1000 gal See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesHercules Incorporated Hercules Incorporated302-594-5000Foam Unigel 5FSee October 12, 2010Narrative Responses15 to 30 lb/1000 gal See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesHercules Incorporated Hercules Incorporated302-594-5000Foam Unigel 2XLSee October 12, 2010Narrative Responses15 to 30 lb/1000 gal See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesHercules Incorporated Hercules Incorporated302-594-5000Foam Unigel 1XLRSee October 12, 2010Narrative Responses15 to 30 lb/1000 gal See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesHercules Incorporated Hercules Incorporated302-594-5000Foam FRP-121See October 12, 2010Narrative Responses3 to 7 lb/1000 galSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesSNF INC SNF INC912-884-3366Foam NitrogenSee October 12, 2010Narrative Responses200,000 to 2,000,000scf/stageSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesVariousSee October 12, 2010 NarrativeResponsesFoam UnifoamSee October 12, 2010Narrative Responses3 to 5 gptSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Foam SuperSurfSee October 12, 2010Narrative Responses5 gptSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Foam Flomax 50 (CESI)See October 12, 2010Narrative Responses2 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesCESI Chemical CESI Chemical580-658-6608FoamFlomax 50(Clearwater)See October 12, 2010Narrative Responses2 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Foam NCLSee October 12, 2010Narrative Responses2 to 3 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Hercules Plaze 1313 North Market StreetWilmington, DE 19894Hercules Plaze 1313 North Market StreetWilmington, DE 19894PO Box 250 Riceboro, Georgia 31323CBI? CBI? CBI? CBI? CBI?Specifications to Meet SiteRequirementsTable 4. Formulation/Mixture SpecificationsRationale for SiteRequirementsManufacturer ofProduct and/orConstituentsFormulation/MixtureNameConstituentQuantity of Constituentused in HydraulicFracturing (pleasespecify units)Concentration ofConstituent as Injected(please indicate units)100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 150561004 S. Plainsman Road Marlow, OK 73055100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056CBI?AddressHercules Plaze 1313 North Market StreetWilmington, DE 19894Hercules Plaze 1313 North Market StreetWilmington, DE 19894Person Who Sold the Product and/or ConstituentsYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesNarrative ResponsesNarrative ResponsesNarrative ResponsesChemistryFoam LEB-10XSee October 12, 2010Narrative Responses0.05 to 0.2 qt/1000 galSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Foam Bioclear 1000See October 12, 2010Narrative Responses2 lb / 500 bblSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Foam NE-90See October 12, 2010Narrative Responses0.5 to 1 gptSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesNalco Nalco281-263-7000Foam GBL-8XSee October 12, 2010Narrative Responses0.05 to 0.2 qt/1000 galSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesCESI Chemical CESI Chemical580-658-6608Foam NE - 50See October 12, 2010Narrative Responses0.5 to 1 gpt/1000 galSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Foam API Frac SandSee October 12, 2010Narrative Responses0.5 to 5 lb per gallonSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesVariousSee October 12, 2010 NarrativeResponsesFoam TransfoamSee October 12, 2010Narrative Responses5 gptSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Foam Fracs Carbon DioxideSee October 12, 2010Narrative Responses80 to 160 tons per jobSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesVariousSee October 12, 2010 NarrativeResponsesHigh Volume CBI? Average Volume CBI? Low VolumeCBI?Quantity of WaterUsed(gallons)Incoming WaterSourceQuality of WaterTable 5. Formulation/Mixture/Water SpecificationsRange of Total FluidInjected(Low to High)(gallons)Average Volume ofTotal Fluid Injected(gallons)CBI? CBI? CBI? CBI?Formulation/MixtureName1004 S. Plainsman Road Marlow, OK 73055Leetsdale, PA 15056CBI?Geological Factors Associated with Low, Average, High Volumes Injected (Type of Geologic Media, Depthof Job,Extent of Fracturing Desired)100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 150567705 Highway 90-A Sugar Land, TX 77478100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056YesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)FoamRefer to responseprovided under"Range of TotalFluid Injected"See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative Responses5,000 to 30,000 gal perstage; 1 to 5 stages perwellSee October 12, 2010Narrative ResponsesSee October 12, 2010Question 3 AddendumSee October 12, 2010 Question 3AddendumSee October 12,2010 Question 3AddendumYesYesYesYesYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)AcidFormulation/ MixtureNameChemical Name (UseIUPACNomenclature)CBI? Chemical Formula CBI?Chemical AbstractSystem (CAS) NumberCBI?Purpose of Chemical inHydraulic Fracturing FluidFormulation/MixtureCBI?Concentration asDelivered to Site(please indicate units)CBI?How was theConcentrationDetermined?CBI?Indicate Analytical Method used toDetermine Concentration (includeanalytical preparation methodwhere applicable)CBI?Is the MSDSAttached?Acid AGA-150 Isopropyl Alcohol 67-63-040-70%None AvailableAcid Acid Pensurf2-Ethylhexanol,Dodecylbenzenesulfonate isopropanolamine104-76-7, 42504-46-140-70%, 30-60%None AvailableAcid ABF SaltAmmonium Biflouride,Ammonium Fluoride1341-49-7, 12125-01-8> 94%, 4%None AvailableAcid HCL Acid Hydrochloric Acid 7647-01-032% to 3%None AvailableAcid Acetic Acid Acetic Acid 64-19-720% to 5%None AvailableFormulation/Mixture Specific QuestionsFORMULATION / MIXTURE SPECIFIC QUESTIONSPlease provide information on all constituents in the formulation/mixture. If Material Safety Data Sheets (MSDSs) are available, please attach them to your submittal.Formulation/Mixture Name:Hydraulic FracturingTable 1. Chemical ConstituentsCalculatedNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoSelectSelectSelectSelectSelectSelectAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesViscosifierSurfactantSelectAcid treatmentSelectAcid treatmentSelectAcid treatmentSelectIron controlAcid Iron Chekhydroxyacetic acid,Methyl Alcohol79-14-1, 67-56-130-60%, 15-40%None AvailableAcid Iron Sta IIC ethylene glycol 107-21-110-30%None AvailableAcid AR-1 Isopropyl Alcohol 67-63-0Acid Retarder30-60%None AvailableAcid Unihib A######################67-56-1, 68002-97-1,Proprietary, 64741-68-0,64742-95-6, Proprietary,8008-20-6, 64742-47-8,10-30%, 10-30%, 5-10%, 5-10%, 5-10%, 1-5%, 1-5%, 1-5%, 1-5%,1-5%, 1-5%, 0.1-1%, 0.1-None AvailableAcid Unihib OEthylene Glycol,Isopropyl alcohol107-21-1, 67-63-065-100%, 3-7%None AvailableAcid Unihib 250Propargyl Alcohol, GlycolEthers, Isopropyl alcohol107-19-7, 111-76-2, 67-63-015-40%, 15-40%, 15-40%None AvailableCalculatedNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoSelectSelectSelectSelectSelectSelectSelectAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoSelectSelectSelectSelectYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesViscosifierSurfactantSelectAcid treatmentSelectAcid treatmentSelectAcid treatmentSelectIron controlSelectIron controlSelectOther, specify:SelectCorrosion inhibitorSelectCorrosion inhibitorSelectCorrosion inhibitorNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)Formulation/MixtureNameChemical Name CBI?Solubility in Water(mg L-1)Viscosity (cP)and SpecifyTemperatureVapor Pressure(acceptableunits atm, bar,Pa, mm Hg)Other(pleasespecify)AcidAGA-150None Available None Available None AvailableNone AvailableAcidAcid PensurfNone Available None Available None AvailableNone AvailableAcidABF Salt630000 None Available None AvailableNone AvailableAcidHCL Acid"Soluble" None Available 25 mmHg @ 20CNone AvailableAcidAcetic AcidNone Available None Available None AvailableNone AvailableAcidIron ChekNone Available None Available None AvailableNone AvailableAcidIron Sta IICNone Available None Available None Available None AvailableAcidAR-1 None Available None Available None Available NoneAvailable None Available 0.9149None Available None Available None AvailableNone AvailableAcidUnihib A"Oil" "10-14 cPs" None AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone Available None AvailableNone AvailableNone AvailableNone Available None AvailableNone AvailableOctanol- Water PartitionCoefficient KowNone AvailableKH(acceptable units atm L mol1or bar L mol-1or Pa L mol-1oratm m3mol-1or bar m3mol-1orPa m3mol-1)None AvailableNone AvailableNone AvailableNone AvailableDistribution Coefficient Kd(L kg-1)None AvailableNone AvailableNone AvailableNone AvailableMolar Mass(g mol-1)Organic Carbon-Water PartitionCoefficient KOC(L kg-1)Table 2. Chemical and Physical Properties of Chemical ConstituentsPlease provide the chemical and physical propertiesof the chemical constituents listed in Table 1 above.None Available0.91991.51.161.0649None AvailableNone Available1.11.2200.964None AvailableNone AvailableNone Available None AvailableNone AvailableNone AvailableNone AvailableNone AvailableDensity(g cm3or g mL-1)0.8749None AvailableNone AvailableNone Available None AvailableYesYesYesYesYesYesYesYesYesAcidUnihib ONone Available None Available None AvailableNone AvailableAcidUnihib 250 None Available None Available None Available None Available None Available 0.9749None Available None Available None AvailableNone AvailableFormulation/MixtureNameProppant Name CBI?ProppantSpecificationsCBI?Is the Proppant ResinCoated?CBI?Specify the Resin CoatingMaterials UsedCBI?Acid Not ApplicableAcidAcidAcidAcidAcidAcid1.0849Table 3. Proppant ConstituentsPlease provide the chemical and physical propertiesof the proppants listed in Table 1 above.None Available None AvailableNone AvailableNone Available None AvailableYesYesNoYesNoYesNoYesNoYesNoYesNoNoYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesAcidYesYesNoYesNoYesNoYesNoYesNoYesNoNoYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)NameTelephoneNumberCBI?Acid AGA-150See October 12, 2010Narrative Responses20 to 40 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Acid Acid PensurfSee October 12, 2010Narrative Responses1 to 2 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Acid ABF SaltSee October 12, 2010Narrative Responses400 lb per 1000 gallons tomake 12/3 HCL/HF acidSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesSolvay Fluorides LLC Solvay Fluorides LLC877-765-8292Acid HCL AcidSee October 12, 2010Narrative Responses3 to 32% See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesVariousSee October 12, 2010 NarrativeResponsesAcid Acetic AcidSee October 12, 2010Narrative Responses5 to 20%See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Acid Iron ChekSee October 12, 2010Narrative Responses10 to 20 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Acid Iron Sta IICSee October 12, 2010Narrative Responses10 to 20 gptSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Acid AR-1See October 12, 2010Narrative Responses5 to 10 gptSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Acid Unihib ASee October 12, 2010Narrative Responses1 to 4 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesChampion Technologies Champion Technologies724-318-1050Acid Unihib OSee October 12, 2010Narrative Responses1 to 4 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Acid Unihib 250See October 12, 2010Narrative Responses1 to 4 gptSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056CBI?Address100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 150563200 Southwest Freeway, Suite 2700 Houston,TX 77027100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056Person Who Sold the Product and/or ConstituentsCBI? CBI?CBI?Formulation/MixtureNameConstituentRationale for SiteRequirementsCBI?Quantity of Constituentused in HydraulicFracturing (pleasespecify units)Concentration ofConstituent as Injected(please indicate units)Manufacturer ofProduct and/orConstituentsPO Box 27328 Houston, TX 77227Table 4. Formulation/Mixture SpecificationsCBI?Specifications to Meet SiteRequirements100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056YesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesAcidUnihib 250Narrative ResponsesNarrative ResponsesNarrative ResponsesChemistryClearwater Engineered Chemistry724-318-1050Acid0Acid0Acid0High Volume CBI? Average Volume CBI? Low VolumeCBI?AcidRefer to responseprovided under"Range of TotalFluid Injected"See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative Responses1,000 to 20,000 gal acidper stage; 1 to 5 stages perwellSee October 12, 2010Narrative ResponsesSee October 12, 2010Question 3 AddendumSee October 12, 2010 Question 3AddendumSee October 12,2010 Question 3AddendumLeetsdale, PA 15056CBI?Geological Factors Associated with Low, Average, High Volumes Injected (Type of Geologic Media, Depthof Job,Extent of Fracturing Desired)CBI? CBI?Range of Total FluidInjected(Low to High)(gallons)Average Volume ofTotal Fluid Injected(gallons)Table 5. Formulation/Mixture/Water SpecificationsFormulation/MixtureNameQuantity of WaterUsed(gallons)Incoming WaterSourceQuality of WaterCBI? CBI?YesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)Acid BreakdownFormulation/ MixtureNameChemical Name (UseIUPACNomenclature)CBI? Chemical Formula CBI?Chemical AbstractSystem (CAS) NumberCBI?Purpose of Chemical inHydraulic Fracturing FluidFormulation/MixtureCBI?Concentration asDelivered to Site(please indicate units)CBI?How was theConcentrationDetermined?CBI?Indicate Analytical Method used toDetermine Concentration (includeanalytical preparation methodwhere applicable)CBI?Is the MSDSAttached?Acid Breakdown HCL Acid Hydrochloric Acid 7647-01-032% to 3%None AvailableAcid Breakdown Acetic Acid Acetic Acid 64-19-720% to 5%None AvailableAcid Breakdown Acid Pensurf2-Ethylhexanol,Dodecylbenzenesulfonate isopropanolamine104-76-7, 42504-46-140-70%, 30-60%None AvailableAcid Breakdown ABF SaltAmmonium Biflouride,Ammonium Fluoride1341-49-7, 12125-01-8> 94%, 4%None AvailableAcid Breakdown Iron Sta IIC ethylene glycol 107-21-110-30%None Available67-56-1, 68002-97-1,10-30%, 10-30%, 5-Table 1. Chemical ConstituentsHydraulic FracturingFormulation/Mixture Specific QuestionsFORMULATION / MIXTURE SPECIFIC QUESTIONSPlease provide information on all constituents in the formulation/mixture. If Material Safety Data Sheets (MSDSs) are available, please attach them to your submittal.Formulation/Mixture Name:CalculatedNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoSelectSelectSelectSelectSelectSelectAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesAcid treatmentAcid treatmentSurfactantAcid treatmentIron controlCorrosion inhibitorYesAcid Breakdown Unihib A ###################67-56-1, 68002-97-1,Proprietary, 64741-68-0,64742-95-6, Proprietary,8008-20-6, 64742-47-8,10-30%, 10-30%, 5-10%, 5-10%, 5-10%, 1-5%, 1-5%, 1-5%, 1-5%,1-5%, 1-5%, 0.1-1%, 0.1-None AvailableAcid Breakdown Unihib OEthylene Glycol,Isopropyl alcohol107-21-1, 67-63-065-100%, 3-7%None AvailableAcid Breakdown MRA isopropyl alcohol 67-63-0non-emulsifier15-40%None AvailableAcid Breakdown Iron Chekhydroxyacetic acid,methyl alcohol79-14-1, 67-56-130-60%, 15-40%None AvailableCalculatedNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoSelectSelectSelectSelectSelectSelectSelectAnalyticallyYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesAcid treatmentAcid treatmentSurfactantAcid treatmentIron controlCorrosion inhibitorCorrosion inhibitorCalculatedAnalyticallyYesNoCalculatedAnalyticallyYesNoSelectSelectYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesIron controlOther, specify:YesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)Formulation/MixtureNameChemical Name CBI?Solubility in Water(mg L-1)Viscosity (cP)and SpecifyTemperatureVapor Pressure(acceptableunits atm, bar,Pa, mm Hg)Other(pleasespecify)Acid BreakdownHCL Acid"Soluble" None Available 25 mmHg @ 20CNone AvailableAcid BreakdownAcetic AcidNone Available None Available None AvailableNone AvailableAcid BreakdownAcid PensurfNone Available None Available None AvailableNone AvailableAcid BreakdownABF Salt630000 None Available None AvailableNone AvailableAcid BreakdownIron Sta IICNone Available None Available None Available None AvailableAcid BreakdownUnihib A"Oil" "10-14 cPs" None AvailableNone AvailableAcid BreakdownUnihib ONone Available None Available None AvailableNone AvailableAcid BreakdownMRANone Available None Available None AvailableNone AvailableAcid BreakdownIron ChekNone Available None Available None AvailableNone AvailableOrganic Carbon-Water PartitionCoefficient KOC(L kg-1)None AvailableTable 2. Chemical and Physical Properties of Chemical ConstituentsPlease provide the chemical and physical propertiesof the chemical constituents listed in Table 1 above.None AvailableOctanol- Water PartitionCoefficient KowNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone Available None Available None AvailableNone Available None Available None Available1.0849None AvailableNone AvailableNone Available None Available 1.11.220None AvailableDensity(g cm3or g mL-1)1.161.0649None AvailableNone AvailableNone AvailableNone AvailableNone AvailableKH(acceptable units atm L mol1or bar L mol-1or Pa L mol-1oratm m3mol-1or bar m3mol-1orPa m3mol-1)0.9199None AvailableNone Available None Available 1.0299None AvailableNone AvailableNone Available1.50.964Molar Mass(g mol-1)None AvailableNone AvailableNone AvailableDistribution Coefficient Kd(L kg-1)None AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableNone AvailableYesYesYesYesYesYesYesYesYesFormulation/MixtureNameProppant Name CBI?ProppantSpecificationsCBI?Is the Proppant ResinCoated?CBI?Specify the Resin CoatingMaterials UsedCBI?Acid Breakdown Not ApplicableAcid BreakdownAcid BreakdownAcid BreakdownAcid BreakdownAcid BreakdownAcid BreakdownTable 3. Proppant ConstituentsPlease provide the chemical and physical propertiesof the proppants listed in Table 1 above.YesYesNoYesNoYesNoYesNoYesNoYesNoNoYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesNovember 19, 2010 Response of Patterson-UTI Energy,Inc. toSeptember 9, 2010 Request of U.S. Environmental Protection Agency(supersedes prior version)NameTelephoneNumberCBI?Acid Breakdown HCL AcidSee October 12, 2010Narrative Responses3 to 32% See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesVariousSee October 12, 2010 NarrativeResponsesAcid Breakdown Acetic AcidSee October 12, 2010Narrative Responses5 to 20% See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Acid Breakdown Acid PensurfSee October 12, 2010Narrative Responses1 to 2 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Acid Breakdown ABF SaltSee October 12, 2010Narrative Responses400#/1000 gal for 12/3HCL/HF AcidSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesSolvay Fluorides LLC Solvay Fluorides LLC877-765-8292Acid Breakdown Iron Sta IICSee October 12, 2010Narrative Responses10 to 20 gptSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Acid Breakdown Unihib ASee October 12, 2010Narrative Responses1 to 4 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesChampion Technologies Champion Technologies724-318-1050Acid Breakdown Unihib OSee October 12, 2010Narrative Responses1 to 4 gptSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Acid Breakdown MRASee October 12, 2010Narrative Responses30 gptSee October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Acid Breakdown Iron ChekSee October 12, 2010Narrative Responses10 to 20 gpt See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative ResponsesClearwater EngineeredChemistryClearwater Engineered Chemistry724-318-1050Acid Breakdown 0Acid Breakdown 0CBI? CBI?Formulation/MixtureNameConstituentQuantity of Constituentused in HydraulicFracturing (pleasespecify units)Concentration ofConstituent as Injected(please indicate units)Specifications to Meet SiteRequirementsRationale for SiteRequirementsManufacturer ofProduct and/orConstituentsCBI? CBI? CBI?Table 4. Formulation/Mixture Specifications100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056PO Box 27328 Houston, TX 77227100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 150563200 Southwest Freeway, Suite 2700 Houston,TX 77027CBI?Address100 Leetsdale Industrial Drive, Suite ALeetsdale, PA 15056Person Who Sold the Product and/or ConstituentsYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesAcid Breakdown0Acid Breakdown 0Acid Breakdown 0Acid Breakdown 0High Volume CBI? Average Volume CBI? Low VolumeCBI?Acid BreakdownRefer to responseprovided under"Range of TotalFluid Injected"See October 12, 2010Narrative ResponsesSee October 12, 2010Narrative Responses350 to 5,000 gal of acid perstage; 1 to 16 stages perwellSee October 12, 2010Narrative ResponsesSee October 12, 2010Question 3 AddendumSee October 12, 2010 Question 3AddendumSee October 12,2010 Question 3AddendumFormulation/MixtureNameQuantity of WaterUsed(gallons)Incoming WaterSourceQuality of WaterRange of Total FluidInjected(Low to High)(gallons)Average Volume ofTotal Fluid Injected(gallons)CBI? CBI? CBI? CBI?Table 5. Formulation/Mixture/Water SpecificationsCBI?Geological Factors Associated with Low, Average, High Volumes Injected (Type of Geologic Media, Depthof Job,Extent of Fracturing Desired)YesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYes

# November 19, 2010 Response of Patterson-UTI Energy, Inc. to

September 9, 2010 Request of U.S. Environmental Pro tection Agency

(supersedes prior version)



# Question Number

CBI?

CBI?

CBI?

CBI?

CBI?

CBI?

CBI? Hydraulic Fracturing

Cross reference your comments by question number and indi cate the confidential status of your comment by checking th e

box next to “Yes” under "CBI?" (Confidential Business I nformation).

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes 

# CBI?

CBI?

CBI?

CBI?

CBI?

CBI?

CBI? Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

# November 19, 2010 Response of Patterson-UTI Energy, Inc. to

September 9, 2010 Request of U.S. Environmental Pro tection Agency

(supersedes prior version)



# CBI?

CBI?

CBI?

CBI?

CBI?

CBI?

CBI?

CBI?

CBI?

CBI? Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes 

# CBI?

CBI?

CBI?

CBI?

CBI?

CBI? Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

# November 19, 2010 Response of Patterson-UTI Energy, Inc. to

September 9, 2010 Request of U.S. Environmental Pro tection Agency

(supersedes prior version)



# CBI?

CBI?

CBI?

CBI? Yes

Yes

Yes

Yes

# November 19, 2010 Response of Patterson-UTI Energy, Inc. to

September 9, 2010 Request of U.S. Environmental Pro tection Agency

(supersedes prior version)



# Comments

Cross reference your comments by question number and indi cate the confidential status of your comment by checking th e

box next to “Yes” under "CBI?" (Confidential Business I nformation).

Comment

# November 19, 2010 Response of Patterson-UTI Energy, Inc. to

September 9, 2010 Request of U.S. Environmental Pro tection Agency

(supersedes prior version)

# November 19, 2010 Response of Patterson-UTI Energy, Inc. to

September 9, 2010 Request of U.S. Environmental Pro tection Agency

(supersedes prior version)

# November 19, 2010 Response of Patterson-UTI Energy, Inc. to

September 9, 2010 Request of U.S. Environmental Pro tection Agency

(supersedes prior version)

# November 19, 2010 Response of Patterson-UTI Energy, Inc. to

September 9, 2010 Request of U.S. Environmental Pro tection Agency

(supersedes prior version)

# November 19, 2010 Response of Patterson-UTI Energy, Inc. to

September 9, 2010 Request of U.S. Environmental Pro tection Agency

(supersedes prior version)

# November 19, 2010 Response of Patterson-UTI Energy, Inc. to

September 9, 2010 Request of U.S. Environmental Pro tection Agency

(supersedes prior version)

# November 19, 2010 Response of Patterson-UTI Energy, Inc. to

September 9, 2010 Request of U.S. Environmental Pro tection Agency

(supersedes prior version)

# November 19, 2010 Response of Patterson-UTI Energy, Inc. to

September 9, 2010 Request of U.S. Environmental Pro tection Agency

(supersedes prior version)

# November 19, 2010 Response of Patterson-UTI Energy, Inc. to

September 9, 2010 Request of U.S. Environmental Pro tection Agency

(supersedes prior version)

# Transportation-Related Municipal Separate Storm Sew er Systems (MS4s) Questionnaire

Drop Down Tables

State Names and Abbreviations

Select

AL

AK

AS

AZ

AR

CA

CO

CT

DE

DC

FM

FL

GA

GU

HI

ID

IL

IN

IA

KS

KY

LA

ME

MH

MD

MA

MI

MN

MS

MO

MT

NE

NV

NH

NJ

NM

NY

NC

ND

MP

OH

OK

OR

PW

PA

PR

RI

SC

SD

TN

TX

UT

VT TEXAS

UTAH PENNSYLVANIA

PUERTO RICO

RHODE ISLAND

SOUTH CAROLINA No Answer

VERMONT SOUTH DAKOTA

TENNESSEE OHIO

OKLAHOMA

OREGON

PALAU NEW YORK

NORTH CAROLINA

NORTH DAKOTA

NORTHERN MARIANA ISLANDS NEVADA

NEW HAMPSHIRE

NEW JERSEY

NEW MEXICO MISSISSIPPI

MISSOURI

MONTANA

NEBRASKA MARYLAND

MASSACHUSETTS

MICHIGAN

MINNESOTA KENTUCKY

LOUISIANA

MAINE

MARSHALL ISLANDS ILLINOIS

INDIANA

IOWA

KANSAS GEORGIA

GUAM

HAWAII

IDAHO FEDERATED STATES OF MICRONESIA

FLORIDA ARKANSAS

CALIFORNIA

COLORADO

CONNECTICUT ALABAMA

ALASKA

AMERICAN SAMOA

ARIZONA

DELAWARE

DISTRICT OF COLUMBIA

# Transportation-Related Municipal Separate Storm Sew er Systems (MS4s) Questionnaire

Drop Down Tables

VI

VA

WA

WV

WI

WY

Yes/No Yes/No DB Codes

Select No Answer

Yes Yes

No No

am/pm am/pm DB Codes

Select No Answer

am am

pm pm

Purpose Table 1 Purpose Table 1DB Codes WEST VIRGINIA

WISCONSIN

WYOMING VIRGIN ISLANDS

VIRGINIA

WASHINGTON