Storm Water Permits for Construction Activities

Transcription

1 Strm Water Permits fr Cnstructin Activities U.S. Army Envirnmental Center A Guide fr Installatins 29 March 1996 Prepared fr: U.S. Army Envirnmental Center Aberdeen Prving Grund, Maryland ffistbibcmom fftätdmiimt ^=t fösfcräiraüta Unlimited Prepared by: Lgistics Management Institute 2000 Crprate Ridge McLean, Virginia Department f Defense Cntract MDA C-0006 Task Order AR411R1 Printed n Recycled Paper mm qijauti msmumm, AEC Frm ^5,1 Feb 93 replaces THAMA Frm ks which is bslete.

2 Strm Water Permits fr Cnstructin Activities A Guide fr Installatins 29 March 1996 Prepared fr: U.S. Army Envirnmental Center Aberdeen Prving Grund, Maryland Prepared by: Lgistics Management Institute 2000 Crprate Ridge McLean, Virginia Department f Defense Cntract MDA C-0006 Task Order AR411R1 DTIC QUALITY USSFEWEED Printed n Recycled Paper

3 Preface OBJECTIVES OF THE GUIDE A majr gal f the Army's strm water prgram is t minimize the impacts f installatin activities n lcal water quality in the mst cst-effective manner. T supprt this gal, this guide prvides administrative guidance fr installatin envirnmental staff regarding their cmpliance duties assciated with cnstructin activities at Army installatins. This guide is nt intended t be used as a plicy r peratins dcument. It can be used as a stand-alne guide r as an appendix t training manuals fr new installatin envirnmental staff members. ORGANIZATION OF THIS GUIDE This guide is rganized t prvide step-by-step prcedures, accmpanying wrksheets, answers t cmmnly asked questins, and additinal references t guide the reader thrugh the permitting prcess in the mst efficient manner. It is meant t cmplement existing dcuments frm the U.S. Envirnmental Prtectin Agency and the U.S. Army Crps f Engineers by prviding practical advice fr the installatin envirnmental persnnel respnsible fr managing strm water permits. This guide is divided int the fllwing sectins: An verview and histry f the general strm water regulatins (Chapter 1) Rles and respnsibilities f installatin staff respnsible fr managing cnstructin activities subject t strm water regulatins (Chapter 1 and appendices) Guidelines fr btaining a Natinal Pllutant Discharge Eliminatin System strm water permit fr cnstructin activities (Chapter 2) Step-by-step prcedures t develp and implement a Strm Water Pllutin Preventin Plan fr cnstructin activities (Chapter 3) Summary f state cnstructin permit requirements, available references, sample checklists and wrksheets, frms and letters, and a list f the Army pints f cntact invlved with the strm water prgram (Appendices A thrugh F) Glssary (Appendix G). in

4 DRAFT - AR411RD1-04/10/96 Cntents Chapter 1. Strm Water Regulatins and Persnnel Respnsibilities fr Cnstructin Activities at Installatins l-i Chapter Objectives 1_1 Overview f Strm Water Regulatins l-i Understanding the Cnstructin Prcess and Permitting Requirements 1_4 Respnsibilities f the Installatin Offices, USACE Districts, and Private Cntractrs 1_5 Further Assistance and Infrmatin 143 Chapter 2. The NPDES General Permit Requirements fr Strm Water Discharges Assciated with Cnstructin Activities 2-1 Chapter Objectives 2-1 Permit Backgrund 2-1 Ntice f Intent Requirements 2-2 Strm Water Pllutin Preventin Plan fr Cnstructin Activities 2-3 Best Management Practices fr Cnstructin Activities 2-5 Summary f Certificatin Requirements 2-6 Mnitring and Inspectin Requirements 2-6 Nn-Strm-Water Discharges 2-7 Ntice f Terminatin Requirements 2-7 Recrd-Keeping Requirements 2-7 Penalties fr Nncmpliance 2-8 State General Permit Requirements 2-8 Chapter 3. Preparing Strm Water Pllutin Preventin Plans fr Cnstructin Activities 3-1 Chapter Objectives 3_1 Develping and Implementing an SWPPP fr Installatin- Managed Prjects 3_1

5 DRAFT - AR411RD1-04/10/96 Cntents (Cntinued) Appendix A. Summary f State and Federal General Permits fr Strm Water Discharges Assciated with Cnstructin Activity 1996 Appendix B. Sample Cnstructin Pllutin Preventin Plan Appendix C. Available References fr Strm Water Discharges Assciated with Cnstructin Activities Appendix D. Sample Checklists and Frms fr the Cnstructin General Permit Appendix E. Pints f Cntact fr the Army Strm Water Prgram Appendix F. U.S. Army Crps f Engineers: Cmmmly Asked Strm Water Questins and Answers Appendix G. Glssary VI

6 CHAPTER 1 Strm Water Regulatins and Persnnel Respnsibilities fr Cnstructin Activities at Installatins CHAPTER OBJECTIVES This chapter discusses the strm water permitting, planning, and implementatin phases f regulated cnstructin (als referred t as grund-disturbing) activities n Army installatins. It als identifies typical rles and respnsibilities f the envirnmental staff, U.S. Army Crps f Engineers (USACE), and private cntractrs. At the cmpletin f this chapter, readers shuld understand the regulatry backgrund, understand the cnstructin prcess at the installatin, identify respnsibilities f each participant, incrprate helpful hints int installatin plicies and cnstructin cntracts, and knw where t g fr mre infrmatin and assistance. OVERVIEW OF STORM WATER REGULATIONS Why Des EPA Regulate Strm Water Discharges frm Cnstructin Sites? Accrding t the U.S. Envirnmental Prtectin Agency's (EPA's) Natinal Water Quality Inventry, plluted strm water runff causes mst f the damage t the Natin's rivers, lakes, and streams. The mst frequently identified pllutant is sil carried by strm water runff thrugh pint and nnpint discharges frm grund-disturbing activities such as cnstructin. T address that prblem, the Federal Water Pllutin Cntrl Act (Sectin 402[p] f the 1987 Amendments), cmmnly referred t as the Clean Water Act (CWA), requires peratrs f certain cnstructin activities t btain Natinal Pllutant Discharge Eliminatin System (NPDES) permits fr pint-surce discharges f strm water int waters f the United States. Althugh cnstructin activities can release many different pllutants, the greatest impact n water quality is frm sil ersin. Grading activities that remve grass, rcks, pavement, and ther prtective grund cvers expse the underlying sil t the elements. When the grund surface is unprtected, sil and sand particles are easily erded (i.e., they are picked up by the wind r washed 1-1

7 away by rain r melting snw). The water carrying these particles eventually reaches a stream, river, r a lake where it slws dwn, allwing the particles t settle t the bttm. This prcess is called sedimentatin. Layers f clays and sediments build up in the stream beds, chking the river and stream channels and cvering the habitat where fish spawn and plants grw. Sediment in the water can als cause respiratin prblems fr fish and prevent light frm reaching the plants grwing in the water clumn. Clearing, grading, r therwise altering previusly undisturbed land increases the ersin rate by as much as 1,000 times the precnstructin rate. Millins f tns f sediment are generated annually by the cnstructin activities in the United States alne. In additin t the heavy sediment ladings, cnstructin activities can release excess nutrients (such as phsphrus and nitrgen), petrleum prducts, waste chemicals (such as slvents and caustics), and slid wastes. Transprted ff-site by strm water, these materials can harm aquatic rganisms and degrade water quality. Are Strm Water Discharges frm Cnstructin Activities Cvered by the Installatin's NPDES General Strm Water Permit? Strm water discharges frm regulated cnstructin sites n the installatin are nt cvered under the installatin's strm water baseline general, multisectr r individual permit fr industrial activities. The CWA Amendments f 1987 directed the EPA t develp regulatins fr strm water discharges assciated with certain activities that can pllute strm water runff. The EPA's final strm water regulatins, published n 16 Nvember 1990, listed 11 types f industrial activities requiring an NPDES permit fr strm water runff. 1 Althugh cnstructin activity is ne f the 11 listed activities, the EPA develped a separate, thugh similar, permit fr certain cnstructin activities. Each cnstructin activity requires a separate strm water cnstructin permit if it (1) meets the EPA's definitin f a cnstructin activity, (2) disturbs five acres r mre f land, and (3) results in a pint-surce discharge int waters f the United States. Similar t the strm water permitting prcess fr ther industrial activities, 2 the EPA issues bth general NPDES permits and individual NPDES permits fr strm water discharges frm cnstructin activities. General permits cntain preventive measures and mnitring requirements that apply t typical cnstructin activities. The regulatry agency will issue an individual permit when the characteristics f a particular site warrant special preventive measures r mnitring requirements. federal Register, "Natinal Pllutant Discharge Eliminatin System (NPDES) Permit Applicatin Regulatins fr Strm Water Discharges," Vlume 55, N. 222, Sectin VI (B), 16 Nvember U.S. Army Envirnmental Center, Army Strm Water Permit Implementatin Handbk,

8 What Is the EPA's Definitin fr a Regulated Cnstructin Activity? A regulated cnstructin activity is defined in Title 40 f the Cde f Federal Regulatins (40 CFR) (b)(14)(x) t include... all clearing, grading, and excavatin activities, except peratins that result in the disturbance f less than five acres [sme states with NPDES permitting authrity regulate sites smaller than five acres] 3 f ttal land area which are nt part f a cmmn plan f develpment r sale. The USAEC will use the Envirnmental Alert newsletter t infrm the installatins f any changes in EPA's definitin. Refer t Appendix F fr infrmatin n hw the five-acre rule applies t separate cnstructin prjects that cllectively exceed five acres. What Is the EPA Definitin fr a Strm Water Pint-Surce Discharge? The EPA defines "strm water" as... strm water runff, surface water runff, street wash waters related t street cleaning r maintenance, infiltratin (ther than infiltratin cntaminated by seepage frm sanitary sewers r by ther discharges) and drainage related t strm events r snw melt. 4 A "pint-surce discharge" is defined in 40 CFR as... any discernible cnfined, and discrete cnveyance, including but nt limited t, any pipe, ditch, channel, tunnel, cnduit, well, discrete fissure, cntainer, rlling stck, cncentrated animal feeding peratin, landfill leachate cllecting system, r vessel r ther flating craft frm which pllutants are r may be discharged. The term des nt include return flws frm irrigated agriculture r agricultural strm water runff. This definitin includes "cnveyances" that were nt created by the "discharger," as lng as they are "reasnably likely t be the means by which pllutants are ultimately depsited int [waters f the United States]." 5 3 After the EPA published Phase I regulatins f the Natinal Strm Water Prgram, the Natural Resurce Defense Cunsel (NRDC) filed suit against the EPA n several issues. The NRDC suit claimed, inter alia, that the EPA had n scientific r technical basis fr chsing a five-acre cutff fr permit requirements. On 4 June 1992, the 9th Circuit United States Curt f Appeals' remanded this five-acre rule. The curt may rule that the existing permit requirement fr greater than five acres may be mdified r eliminated. The EPA made it clear in the 18 December 1992 Federal Register that the existing five-acre limitatin remains in effect until further studies are dne. ^Federal Register, "Natinal Pllutant Discharge Eliminatin System (NPDES) Permit Applicatin Regulatins fr Strm Water Discharges," Vlume 55, N. 222, Sectin VI (B), 16 Nvember 1990, p Ibid.,p

9 UNDERSTANDING THE NSTRUCTION PROCESS AND PERMITTING REQUIREMENTS Many types f regulated cnstructin activities ccur n Army installatins; usually, several different ffices are invlved. It is imprtant, therefre, that the envirnmental staff understand the entire permitting prcess t ensure that respnsibilities are clearly delegated t the apprpriate ffices. Since the EPA's definitin fr a regulated cnstructin activity is quite brad, it can include grund-disturbing activities that are nt usually cnsidered as "cnstructin" in the traditinal sense. The envirnmental staff must understand the definitin f a regulated cnstructin activity in rder t evaluate whether certain activities require a permit. Wh Is Usually Invlved with Grund-Disturbing and Cnstructin Activities Occurring n the Installatin? Cnstructin activities ccurring at an installatin are usually a cllabrative effrt amng the installatin, USACE, and private cntractrs. Persnnel frm sme r all f the fllwing ffices can be invlved: Engineering Services Office Envirnmental Office Cntracting Office Strm Water Pllutin Preventin Team USACE District Office Military training units Private cntractrs architectural-engineering (A-E) firm (design phase) general cntracting firm (implementatin phase). Wh Is Respnsible fr Ensuring That Regulated Cnstructin Activities Cmply with the Law? The installatin cmmander is ultimately respnsible fr activities taking place n the installatin, but he/she usually delegates cmpliance respnsibility t the Envirnmental Office (EO), USACE, r private cntractr. They are then 1-4

10 charged with btaining and cmplying with all applicable strm water permits related t cnstructin activities where the installatin is the permittee. The installatin envirnmental ffice is best suited t ensure that the cmmander understands her/his envirnmental respnsibilities and clearly delegates these respnsibilities (if applicable) t the apprpriate party. Installatins manage the majrity f, but nt all, grund-disturbing activities ccurring at the installatin. 6 Fr example, the USACE, usually thrugh private cntractrs, manages mst large cnstructin prjects at Army installatins and therefre may be respnsible fr btaining all the related permits. In sme cases, the installatin and the USACE share site management respnsibilities and may be named as cpermittees n a strm water permit. This situatin is described in mre detail in Chapter 2. RESPONSIBILITIES OF THE INSTALLATION OFFICES, USACE DISTRICTS, AND PRIVATE NTRACTORS What Are the Installatin Envirnmental Office's Respnsibilities? Typically, the EO is respnsible fr cnsidering the envirnmental cnsequences f installatin activities and managing the apprpriate administrative duties accrding t the applicable envirnmental regulatins. Generally, the EO, in cnjunctin with the Engineering Services Office (ESO) r the USACE, must identify prjects that require a permit; btain an apprpriate permit; develp and implement a Strm Water Pllutin Preventin Plan (SWPPP) fr cnstructin activities; include the strm water permit prvisins in the request fr prpsals and cntracts fr cnstructin activities; ensure accuntability thrugh the use f certificatins; inspect the cnstructin r grund-disturbing activity; maintain and stre SWPPP and assciated recrds; crdinate with state and lcal authrities; 6 Telephne survey f 12 Army installatins f varius sizes frm the Army Materiel Cmmand (AMC), Frces Cmmand (FORSM), and Training and Dctrine Cmmand (TRADOC) cnducted by the Lgistics Management Institute (LMI) in February

11 budget fr necessary time and funds; and update installatin perating prcedures t clarify strm water cmpliance duties. The fllwing subsectins prvide an verview f the typical installatin cmpliance duties regarding strm water discharges frm cnstructin sites. IDENTIFY PROJECTS THAT REQUIRE A PERMIT Varius grund-disturbing prjects n Army installatins fall under the EPA definitin f a regulated cnstructin activity. In additin t traditinal cnstructin activities, sme nntraditinal grund-disturbing activities meet the EPA definitin f a regulated cnstructin activity and may require a permit. Typical activities that may require a permit include clearing f a drp zne; clearing f impact area r demlitin area; grading activities assciated with demlitin r remediatin; excavatin assciated with demlitin r remediatin; new rad building r full-depth recnstructin f existing rads; cnstructin f husing units, ffices, training facilities, r cmmissaries; and cmbat engineer cmpany training activities. These activities require a strm water permit fr cnstructin activities as lng as they (1) disturb five acres 7 r mre f land and (2) result in a pint-surce discharge int a water f the United States. Since the definitin given by the EPA f activities is quite brad, installatins shuld cntact the apprpriate Federal, state, and lcal regulatrs t determine whether an activity is regulated. OBTAIN AN APPROPRIATE PERMIT Once the installatin staff identifies a regulated cnstructin activity, the EO must btain the apprpriate permits r delegate that respnsibility t the ESO, USACE, r private cntractr. In mst instances, the installatin requests cverage under the Federal r state general permit fr strm water discharges frm cnstructin activities. Unlike ther NPDES permits, this permit des nt 7 Check state r lcal regulatins t see if areas less than five acres are regulated by state r lcal regulatins. Appendix A cntains a summary f state minimum acreage requirements. 1-6

12 establish discharge limits, but instead describes cnditins that must be met t discharge strm water frm the site. Applying fr a general permit requires permittees t submit plans describing hw they will cmply with the cnditins listed in the general permit. Such plans are called the Strm Water Pllutin Preventin Plans, r SWPPPs. Installatin staff members shuld cntact the apprpriate Federal EPA r state regulatr t request the cmplete general permitting package cntaining specific instructins and applicatin frms. Chapter 2 discusses the majr sectins f the Federal EPA's NPDES general permit and describes hw an installatin can btain cverage. Appendix A summarizes the permit requirements and pint f cntact (POC) infrmatin fr each state. DEVELOP AND IMPLEMENT AN SWPPP FOR NSTRUCTION ACTIVITIES The preparatin and implementatin f an SWPPP is the basic requirement f any strm water permit and can be rganized in six steps as shwn in Table 1-1. The six steps in preparing an SWPPP are (1) evaluate the cnstructin site, (2) calculate runff, (3) select site cntrls, (4) certify the SWPPP and make ntificatin, (5) implement the SWPPP and start cnstructin, and (6) stabilize the site and terminate the permit. Chapter 3 presents the six steps needed t prepare a SWPPP in greater detail. INCLUDE THE STORM WATER PERMIT PROVISIONS IN THE REQUEST FOR PROPOSALS AND NTRACTS FOR NSTRUCTION ACTIVITIES The general permit and, if already prepared, the SWPPP shuld be physically attached t, r fully incrprated within, the request fr prpsals (RFP) frm r cntract with the A-E firm and general cntractr. In additin, a special prvisin shuld be included in the cntract t put the cntractr n ntice that it will be bund by the terms f the permit and the SWPPP. Engineering Circular N , Engineering and Design Envirnmental Prtectin Guide Specificatin, prepared by USACE in March 1994, prvides envirnmental cmpliance prvisins fr Army cnstructin cntracts. Since the strm water permit cnditins are basically cntract requirements, the installatin engineer r envirnmental persnnel shuld administratively enfrce them as they wuld any ther cntract requirement. In the event that vilatins ccur, the EPA and /r state may require ther specific enfrcement actins t crrect the prblem. Cntracts shuld direct the cntractr t assume respnsibility fr any actins required as a result f failure t cmply with the general permit. Installatin envirnmental persnnel must direct all crrective actins thrugh the apprpriate cntracting fficer. 1-7

13 Table 1-1. Installatin SWPPP Respnsibilities fr Cnstructin Activities Steps in preparing an SWPPP Step 1: Evaluate the cnstructin site r grund-disturbing activity t determine if it requires a strm water permit. Step 2: Assess the impact f the strm water discharges by calculating the runff cefficient and discharge rates frm the site fr bth precnstructin and pstcnstructin states. Step 3: Select site cntrls and prepare the SWPPP. Step 4: Certify the SWPPP and ntify the regulatrs and the public. Step 5: Implement the SWPPP and start cnstructin r grund-disturbing activity. Step 6: Stabilize the site, submit an NOT when cnstructin ends, and stre the apprpriate recrds fr the required time. Installatin respnsibilities ESO Develp the RFP t include SWPPP requirements. Attach r reference the general permit t the RFP fr A-E firm. EO Review the RFP t ensure it cntains the SWPPP fr each prject plan r develp an in-huse SWPPP. A-E firm (if cntracted) Cllect data and prepare plan. ESO/EO Review A-E calculatins fr adequacy r calculate required infrmatin. A-E firm (if cntracted) Calculate required infrmatin. ESO/EO Review draft plan fr adequacy r select cntrls and cmplete plan in huse. Attach the general permit and the SWPPP t the RFP fr the general cntractr (if applicable). A-E firm (if cntracted) Cmplete the SWPPP, prepare a descriptin f cntrls, and prepare the sequence f events. ESO/EO Obtain required signatures n the SWPPP, submit the NOI, and facilitate public access t the SWPPP. General cntractr (if applicable) Sign cntractr certificatin and cmply with cntract requirements. ESO/EO Inspect the cnstructin site r grund-disturbing activity and ensure the SWPPP is updated. General cntractr (if applicable) Implement and inspect cntrls and ntify the ESO/EO f changes r releases. Cntracting ffice Ensure cntracts are being fllwed and amended as needed. ESO/EO Inspect the site and ensure pst cntrls are in place, submit the NOT t the EPA, and stre related recrds. General cntractr (if applicable) Stabilize the site as required in the SWPPP and ntify the ESO/EO. 1-8

14 ENSURE ACUNTABILITY THROUGH THE USE OF CERTIFICATION All crrespndence, reprts, SWPPPs, ntices f intent (NOIs), NOTs, r ther infrmatin submitted t the regulatry fficials must be signed by the "authrized fficial." Fr the strm water permit requirements, an authrized fficial is a "senir executive fficer respnsible fr the verall peratin f a principal gegraphic unit f the agency." That peratr can be either the installatin cmmander r USACE district engineer. Hwever, the installatin cmmander r USACE district engineer may designate a representative installatin engineer, envirnmental crdinatr, divisin chief, r branch chief t be respnsible fr handling and signing all apprpriate dcuments. The signatry authrity must be delegated in writing and submitted t the regulatry agency having jurisdictin. A sample delegatin letter is in Appendix D. In signing the plan, the authrized representative assumes liability fr the plan and certifies that the infrmatin is true. INSPECT THE NSTRUCTION OR GROUND-DISTURBING ACTIVITY Strm water cntrl measures must be inspected at regular intervals as well as after every significant rainfall. 8 Althugh the inspectin is usually a cntractr's respnsibility, the installatin (r USACE district), as well as the cntractr, may receive a ntice f vilatin (NOV) fr nncmpliance. Therefre, it wuld be prudent t have persnnel frm the installatin's envirnmental ffice (r USACE representative) peridically inspect site cnditins t ensure that the installatin's persnnel r cntractrs are meeting cntract requirements. Since cntractrs usually are respnsible fr cmplying with the specific inspectin schedule, they shuld have the apprpriate inspectin frms n site. Installatin persnnel can then review the recrds t ensure they were filled ut at the required intervals. The general permits als require site peratrs t inspect the cntrl measures (i.e., best management practices [BMPs]) after a significant rain event. Therefre, the cntractr either must have a rain gauge n site r be able t easily btain the infrmatin. Installatin r cntractr persnnel perfrming site inspectins shuld be experienced in cnstructin, ersin, and sediment-cntrl practices. Althugh the EPA's general permit des nt have specific training requirements fr site inspectrs, sme authrized states d. Check with the state permit t determine the inspectr's qualificatins. In general, installatin r cntractr persnnel shuld be familiar with the fllwing: Strm water regulatins Lcatin and type f ptential prblems and cntrl measures Cnstructin requirements fr the cntrl measures 8 See Chapter 2 fr the Federal inspectin requirements and Appendix A fr a summary f the state inspectin requirements. 1-9

15 Inspectin and maintenance recrd-keeping requirements Site husekeeping and material management practices Spill respnse requirements. Chapter 3 details site inspectin requirements. MAINTAIN AND STORE SWPPP AND ASSOCIATED RERDS The installatin must maintain recrds fr each permitted cnstructin activity fr three years after submitting the NOT. Therefre, the installatin ESO (r delegated ffice) must arrange fr file strage and ensure that the site peratrs (cntractr r Crps engineer) submit final cpies f the SWPPP, NOI, certificatins (authrized persn and cntractrs), inspectin reprts, maintenance reprts, cnstructin activity reprts, related crrespndence with regulatrs, and NOT. Fr rganizatinal purpses, recrds shuld be retained in a binder (r prject file) with the NPDES permit number, cnstructin activity title, and the cnstructin dates nted n the spine f the binder. This will facilitate data strage and data retrieval. ORDINATE WITH STATE AND LOCAL AUTHORITIES Althugh similar t the Federal permitting prcess, mst states have the authrity t adpt stricter permit requirements fr Federal facilities. Therefre, it is imprtant that installatin persnnel cntact the state strm water POC r the lcal Sil Cnservatin Service fr mre infrmatin abut permit requirements, BMP apprpriateness, and design specificatins fr that specific area. Appendix A lists the state POCs. 1-10

16 BUDGET FOR NECESSARY TIME AND FUNDS As with any regulatry requirement, installatins may have t budget fr additinal funds fr permitting cnstructin r grund-disturbing activities t cver additinal direct and indirect csts. Mst direct csts will be cvered in the cnstructin cntract since the cntractr will be required t cmply with the regulatins. Hwever, the installatin may incur sme additinal prject related csts if the strm water requirements were nt included in the riginal cntract prvisins r if the installatin is cnducting its wn grund-disturbing activities. T develp current cst estimates fr BMPs, use the latest cst data and site infrmatin. The installatin EO may als incur csts t administer a permit, prepare an SWPPP, and implement required BMPs at installatin-managed, grunddisturbing activities. The USACE estimates that it takes n average an additinal 2 t 3 persn-days t review the plans and fill ut the permit applicatin (NOI) fr an rdinary cnstructin prject. The additinal staff time is als required because nging administrative tasks will vary with the number f cnstructin prjects managed and the size f each. UPDATE INSTALLATION OPERATING PROCEDURES TO CLARIFY STORM WATER MPLIANCE DUTIES Similar t cntracts specifying the strm water duties fr cntractrs, the installatin perating prcedures shuld clearly state the respnsibilities f installatin ffices, USACE, and private cntractrs. The EO shuld review all installatin perating prcedures assciated with cnstructin activities and ensure they reference the apprpriate regulatins and delegate strm water cmpliance duties. What Are the District Engineer's Respnsibilities fr USACE-Managed Cnstructin Activities? The USACE is respnsible fr all permits assciated with Crps-managed cnstructin prjects and, therefre, shuld apply fr any needed strm water permits. Hwever, the Crps may use cntractrs t prepare the NOI, SWPPP, r ther permit requirements. Althugh unlikely, sme cst-shared prjects may invlve strm water discharges that cntinue beynd the cmpletin f the prject. In these cases, the installatin shuld apply fr the strm water permits cvering these cntinuing discharges. The Crps wuld still apply fr thse permits cvering the actual cnstructin. The USACE will usually btain the apprpriate strm water permits (either individual r general) prir t cmpletin f the design phase f a prject. This ensures that any changes t the SWPPP can be made, r any specific permit 1-11

17 requirements can be addressed, prir t cncluding any cntractual relatinship it may have with a design firm. This als ensures that the SWPPP and any specific permit requirements are acceptable prir t the issuance f a slicitatin fr the cnstructin phase f the prject. It is imprtant t nte that even when cnstructin activities at the installatin are managed by the Crps, the regulating agency may send any NOV t an installatin if it is listed n the permit. Installatins shuld always clarify permitting respnsibilities when USACE manages prjects n installatin prperty. What Are the Cntractr Respnsibilities? Cnstructin activities n Army installatins can invlve many different (A-E) cntractrs and subcntractrs during the prject planning phase and the cnstructin phase. The installatin can (and in mst cases shuld) transfer mst f the permitting respnsibilities t the cntractr by identifying thse respnsibilities in the RFP and cntracts. Depending n the cntractual agreement, the A-E firm can be respnsible fr develping the SWPPP, while the general cntractr can be respnsible fr preparing and submitting the NOI, implementing the SWPPP, and submitting the NOT. Regardless f the cntractual relatinship, since the general cntractr is respnsible fr the day-t-day peratins at the site, it incurs sme respnsibility under the regulatin. In sme instances, the general cntractr may be respnsible fr filing an NOI alng with the installatin. Als, it is respnsible fr reviewing and signing the SWPPP. By signing the SWPPP, the cntractr acknwledges the terms and cnditins f the permit and SWPPP. An example f a cntractr's certificatin frm is in Appendix D. If pssible, the SWPPP and general permit shuld be included in the RFP. Once site activity starts, the general cntractr is respnsible fr cnstructing and inspecting the site cntrls prescribed in the SWPPP. The respnsibilities f the general cntractr with respect t the NPDES strm water permit are as fllws: File the NOI (as described previusly). Implement the strm water management activities and ther measures stated in the SWPPP. The SWPPP must identify the general cntractr. Sign a certificatin acknwledging the terms and cnditins f the permit. Subcntractrs d nt need t submit an NOI if the general cntractr cntinues t have day-t-day peratinal cntrl f the site and has already filed an NOI. Hwever, all subcntractrs must be identified by name in the SWPPP, must sign a certificatin statement shwing that they understand the permit requirements, and must implement the measures stated in the SWPPP. 1-12

18 FURTHER ASSISTANCE AND INFORMATION Can I Order Additinal References? Appendix C lists regulatry manuals, infrmatin papers, and design guidance related t strm water discharges frm cnstructin sites. This appendix als prvides rdering infrmatin and csts fr the listed references. Where Can I Find Sample Checklists and Frms fr the Cnstructin General Permit? Appendix D cntains the fllwing checklists and sample frms: EPA Cnstructin General Permit Requirement Precnstructin Checklist (D-3) EPA Cnstructin General Permit Cnstructin/Implementatin Checklist (D-5) EPA Cnstructin General Permit Final Stabilizatin/Terminatin Checklist (D-7) Ersin and Sediment Cntrl Selectin Checklist (D-9) Cnstructin General Permit Inspectin and Maintenance Reprt Frm (D-ll) SWPPP Certificatin Frm (D-13) Ntice f Terminatin Frm (D-15) Sample Delegatin Letter (D-17) Sample Cntractrs Certificatin (D-19). Wh Are the Army Pints f Cntact fr Strm Water Issues? Appendix E lists the Army POCs fr strm water issues. Des USACE Prvide Additinal Guidance? Appendix F presents cmmnly asked questins with answers prvided by the USACE Office f the Chief Cunsel. 1-13

19 Is There On-line Assistance? The Defense Envirnmental Netwrk Exchange (DENIX) system prvides persnnel in the envirnmental arena access t envirnmental, legislative, cmpliance, restratin, cleanup, and DD guidance infrmatin thrugh an n-line cmputer bulletin bard system and the Internet's Wrld Wide Web (WWW). Users f DENIX can d the fllwing: Review n-line envirnmental publicatins. Send and receive electrnic mail via the DENIX hst and Internet related t many envirnmental tpics, including strm water issues. Discuss specific questins n varius envirnmental prblems (e.g., strm water prblems). Access listings f envirnmental training curses. Uplad and dwnlad files. Link t ther surces f envirnmental infrmatin. This system has a specific tpic area fr waste-water-related issues. Cntact the DENIX htline at t get a user identificatin passwrd. Yu can als sign up at the DENIX WWW hme page lcated at

20 CHAPTER 2 The NPDES General Permit Requirements fr Strm Water Discharges Assciated with Cnstructin Activities CHAPTER OBJECTIVES This chapter discusses in detail the backgrund and specific requirements f the Federal general permit fr strm water discharges frm cnstructin activities. It als presents the differences between the Federal and state (general) strm water permits fr cnstructin sites. At the cmpletin f this chapter, readers shuld understand the Federal and state permit requirements and assciated time lines. PERMIT BACKGROUND The EPA published the final NPDES general permit fr strm water discharges frm cnstructin activities in the Federal Register in September It will expire n 1 Octber In rder t make the prcess mre efficient and less expensive, EPA develped general permits t cver a brad categry f applicants with similar discharges. Instead f limiting the amunt f pllutin in a discharge, a general permit describes certain cnditins that a permit hlder must meet in rder t discharge strm water frm a cnstructin site. These cnditins include applying fr the permit, develping an SWPPP, implementing best management practices (BMPs), btaining required certificatins, and mnitring and inspecting the site. Under the general permitting prcess, applicants submit a site registratin applicatin r NOI t cmply with the general permit, instead f a lnger, mre cmplex individual permit applicatin (e.g., EPA NPDES Frm 1-C). Hwever, the general permit des nt authrize any nn-strm-water discharges frm the cnstructin activity. 1 Federal Register, "Final NPDES General Permits fr Strm Water Discharges frm Cnstructin Sites," Vlume 57, N. 187,25 September 1992, pp

21 NOTICE OF INTENT REQUIREMENTS The first step in btaining cverage under the general permit invlves filing an NOI with the EPA r the apprpriate state agency. This sectin explains the purpse f the NOI and the requirements fr cmpleting the NOI. An NOI ntifies the state r Federal EPA that the peratr f the cnstructin site will cmply with the terms f the general permit fr cnstructin activities. The Federal NOI requests the site lcatin, wner infrmatin, peratr (general cntractr) infrmatin, receiving water, existing NPDES permit number (if any), an indicatin f existing quantitative data, and a brief descriptin f the prject. Hwever, the specific infrmatin required n an NOI can differ frm state t state. Appendix A presents the telephne numbers f several apprpriate state r Federal strm water POCs and a summary f the state NOI requirements. Cmmnly asked questins cncerning the NOI are discussed in the fllwing subsectins. Wh Is Respnsible fr Submitting an NOI? The NOI is submitted by cnstructin site peratrs. The EPA defines the term "peratr" in tw ways: The peratr is the persn wh has peratinal cntrl ver the site specificatins. Because the installatin engineers r USACE district engineer generally has the ability t change the cnstructin specificatins, this definitin includes the installatin engineer and the USACE district engineer if either f them is managing the cnstructin. The peratr has day-t-day peratinal cntrl ver the site activities. Since the general cntractr usually maintains the cntrl f the site activities, this definitin als encmpasses the rle f the general cntractr. Under the EPA definitins, either the installatin engineer, USACE district engineer, r general cntractr can be respnsible fr filing an NOI. At sme sites where the USACE, installatin, and general cntractr are all invlved, all three may have t sign the NOI. In such cases, thse rganizatins will becme cpermittees. Cpermitting can be dne in ne f the fllwing ways: The installatin engineer (r USACE district engineer) and general cntractr can file a jint NOI. The installatin engineer (r USACE district engineer) and the general cntractr can file separate NOIs, but they shuld be filed at the same time (in the same envelpe) t ntify the EPA that they pertain t the same activity. The installatin engineer (r USACE district engineer) can file an NOI befre the general cntractr is selected; the general cntractr then can file an 2-2

22 amended NOI (which shuld include bth the cntractr's and wner's names) befre beginning wrk n the site. The EO shuld cntact the apprpriate state r Federal authrity t determine if a specific case requires cpermitting. Wh Can Sign the NOI? If the installatin submits the NOI, it must be signed by a respnsible (authrized) fficial such as the installatin cmmander, USACE district engineer, r the chief f the envirnmental ffice. If the cntractr als submits an NOI alng with the installatin's submissin, it must be signed by a respnsible fficial within the cnstructin cmpany. When Shuld the NOI Be Submitted? Installatins seeking cverage under the Federal NPDES cnstructin general permit must submit an NOI frm at least tw days befre cnstructin begins. The site peratr (installatin r USACE district engineer) must cmplete the SWPPP prir t submitting an NOI. Appendix A prvides mre detailed requirements since sme states with NPDES permitting authrity require the NOI earlier r require a cpy f the SWPPP with the NOI. Als, the installatin must submit a new NOI whenever the site peratr changes. Fr example, if a new general cntractr assumes cntrl f a cnstructin site at an Army installatin, it must submit a new NOI at least tw days befre beginning wrk at the site. The permit cverage f the previus peratr des nt carry frward t the new peratr. STORM WATER POLLUTION PREVENTION PLAN FOR NSTRUCTION ACTIVITIES The basic premise f a strm water permit is t develp a clear plan that details hw t prevent strm water cntaminatin frm ccurring in the first place. Cmmnly asked questins cncerning the SWPPP are discussed in the fllwing subsectins while Chapter 3 cntains a detailed discussin f the SWPPP's cntents. What Is the Purpse f the SWPPP? The purpse f the plan is t identify surces f ersin r cntaminatin at a cnstructin site and t select and carry ut actins that prevent r cntrl pllutin frm strm water discharges. Als, by preparing and implementing a 2-3

23 site-specific SWPPP, the site peratr demnstrates cmpliance with the EPA r state general permit. The installatin (r US ACE) must develp a separate sitespecific SWPPP fr each regulated cnstructin activity. When Must an Installatin Prepare the SWPPP? The permittee (installatin, USACE, r private cntractr) must cmplete the SWPPP prir t submitting the NOI. Federal regulatins require that the SWPPP be cmpleted at least 2 days befre cnstructin activities begin. Hwever, sme authrized states require the SWPPP be cmpleted up t 90 days befre cnstructin activities begin. See Appendix A fr the state requirements. D the Regulatrs Require a Cpy f the SWPPP? Usually, the Federal regulatrs d nt require that a cpy f the SWPPP be submitted with the NOI; it must be kept n site alng with the cntractr and subcntractr certificatins and inspectin reprts (as described later in this reprt). Hwever, sme states require the site peratr t submit a cpy f the SWPPP with the NOI. Appendix A lists the states r EPA regins that request a cpy f the SWPPP with the NOI. What Infrmatin Is Required in the SWPPP? The permit requires that the SWPPP cntain a site descriptin and a descriptin f the measures and cntrls installed t prevent r minimize pllutin f strm water. The cmpnents required in the SWPPP include an estimate f the ttal area f the site and f the area t be disturbed; infrmatin n the type f sils at the site and an estimate f the runff cefficient f the site after cnstructin is cmplete; the sequence f maj r cnstructin activities; the name f the receiving water; a list f the sediment and ersin cntrls and ther cntrls; the timing r staging f the sediment, ersin cntrls, and strm water management measures; the certificatin f cmpliance with Federal, state, and lcal regulatins; the prcedures fr maintenance and inspectin; an inventry f materials used fr site peratins; 2-4

24 a list f prcedures fr materials management and prduct-specific spill preventin; certificatin signatures frm an authrized Army representative and cntractrs; and a site map indicating the drainage patterns and slpes after grading activities are cmpleted, area f sil disturbance, utline f the area t be disturbed, lcatin f stabilizatin measures and cntrls, and surface waters at the discharge pints. (An example f a site map is fund in Appendix B.) Wh Must Sign and Certify the SWPPP? Specific signatry requirements fr the SWPPP are listed in each NPDES strm water permit. Official signatures prvide a basis fr enfrcement actin t be taken against the persn signing the dcument. Sectin 309 f the CWA prvides fr significant penalties when the permittee prvides false infrmatin r vilates, either knwingly r negligently, the permit requirements. The plan must be signed by a respnsible (authrized) fficial such as the installatin cmmander, USACE district engineer, r the chief f the envirnmental ffice. (Signatry requirements are discussed further in Chapter 3.) Hw Des the SWPPP Relate t Other Sediment and Ersin Plans fr the Site? The SWPPP is intended t cmplement, nt replace, the site sediment and ersin cntrl plan. Where state and lcal prgrams (e.g., sediment and ersin cntrl, strm water management, and site zning requirements) exist, the peratr must certify that the SWPPP reflects, and is in cmpliance with, all state and lcal requirements. BEST MANAGEMENT PRACTICES FOR NSTRUCTION ACTIVITIES BMPs are the rutine prcedures and devices that reduce the amunt f pllutin in runff t prevent r minimize pllutin f strm water. The U.S. Army Cnstructin Engineering Research Labratry (USACERL) has published a reprt entitled, A Summary f Best Management Practices fr Nn-Pint Surce Pllutin, Technical Reprt EP-93/06 (August 1993), that prvides a cmprehensive review f current BMPs. Appendix C cntains a cmplete lists (and rdering 2-5

25 infrmatin) f the available references that cntain the design and cst infrmatin fr specific BMPs. The fllwing are the three main categries f BMPs: Ersin and sediment cntrls. This categry includes bth stabilizatin cntrls (seeding, mulching, etc.) and structural cntrls (sediment basins, silt fences, etc.) that prevent sil frm migrating ff site. Strm water management cntrls. This categry includes the measures (such as strm water detentin structures, infiltratin measures, etc.) that cntrl strm water runff after the cnstructin is cmplete. Other cntrls (gd husekeeping). This categry includes all f the measures taken at the cnstructin site that prevent cnstructin materials frm cming int cntact with strm water and include dust cntrl measures, ff-site vehicle tracking cntrls, prper waste dispsal at the site, and site sanitatin. SUMMARY OF CERTIFICATION REQUIREMENTS The EPA's general permit fr cnstructin activities relies largely n written certificatins (signatures) t ensure that respnsibilities are explicit. Tw types f certificatins must be made: Certificatin fr true, accurate, and cmplete infrmatin. The NOI, NOT, SWPPP, and inspectin reprts must include certificatins stating that the infrmatin presented is true, accurate, and cmplete. The NOI, NOT, and SWPPP are usually certified and signed by the installatin cmmander, Crps district engineer, r their duly authrized delegate (authrized in writing). The inspectin reprts are usually signed by the general cntractr r site inspectr (either a Crps r installatin representative). The EPA has the authrity t impse varius civil and criminal penalties fr making false statements in such certificatins. In signing the plan, the authrized representative certifies that the infrmatin is true and assumes liability fr the plan. Certificatin fr acknwledging the terms and cnditins f the general permit. The cntractr and subcntractr must certify that they understand and accept the terms and cnditins f the SWPPP. MONITORING AND INSPECTION REQUIREMENTS The SWPPP must cntain a maintenance and inspectin plan that clearly identifies the actins t be taken and the respnsible party. Althugh the Federal EPA's permit des nt require sampling f the permitted discharge, sme states d require visual r chemical mnitring. See Appendix A fr a summary f the state mnitring requirements. The EPA general permit and mst state 2-6

26 general permits require that site peratrs inspect all strm water cntrls every seven calendar days and within 24 hurs after any strm event that prduces mre than 0.5 inches f rainfall in a 24-hur perid. The bjective f inspectins is t ensure that the permit cnditins are being met. Chapter 3 describes the elements f a gd maintenance and inspectin plan. Usually, the inspectr prepares an inspectin reprt dcumenting the inspectin and findings. The inspectr shuld als be respnsible fr ntifying the respnsible parties (cntractrs) f any required maintenance r repairs. If the SWPPP is updated t allw fr site changes r requests frm the regulatry agencies, the inspectr shuld make the changes r ntify the persn respnsible fr the affected cntrl measure. Appendix D cntains a sample inspectin and maintenance reprt frm. NON-STORM-WATER DISCHARGES The general permit requires nn-strm-water discharges t be eliminated prir t the implementatin f the SWPPP. Hwever, it may allw fr a few specific classes f nn-strm-water discharges specified in the general permit. Review the general permit fr details. NOTICE OF TERMINATION REQUIREMENTS The NOT is a ne-page frm that must be submitted t the apprpriate regulatry authrity when a site has been stabilized r when an peratr f a cnstructin activity changes. Typically, it includes the lcatin f the cnstructin site, infrmatin n the peratr terminating cverage, the NPDES general permit number, an indicatin f why cverage shuld be terminated fr the peratr, and a signed certificatin statement. As defined by the EPA, final stabilizatin ccurs when (1) all the sil-disturbing activities at the site are cmpleted and (2) a unifrm perennial vegetative cver with a density f 70 percent f the cver fr unpaved areas nt cvered by permanent structures is established r equivalent permanent stabilizatin measures (such as the use f riprap, gabins, r getextiles) are in place. Appendix D cntains a sample NOT. RERD-KEEPING REQUIREMENTS During cnstructin, the permittees (whever filed the NOI) must keep cpies f the SWPPP, NOI, certificatins, and inspectin reprts at the site. Fllwing the terminatin f cnstructin activities, the permittees (whever filed the NOI) must keep cpies f the SWPPP, NOI, certificatins, inspectin reprts, and the NOT fr at least three years frm the date f final site stabilizatin. Furthermre, the EPA has the authrity t extend the recrds retentin perid, but it must ntify the site peratr in writing. 2-7

27 PENALTIES FOR NONMPLIANCE The CWA prvides significant penalties fr failure t cmply with the strm water permit requirements. Criminal penalties and civil penalties fr negligent vilatins may be assessed fr knwing vilatins; knwing endangerment; r making false statements n permit applicatins, inspectin reprts, r ther submittals. The criminal penalties can be up t 15 years in prisn r $25,000 a day per vilatin. STATE GENERAL PERMIT REQUIREMENTS Mst states have the authrity t issue Federal facilities their wn NPDES permits fr strm water discharges. Therefre, readers are encuraged t cntact state representatives t btain specific permitting infrmatin. Appendix A summarizes the general permit requirements and the state POCs. The fllwing features differ between state and Federal general permits: the expiratin date; the requirement t submit a cpy f the SWPPP with the NOI fr review; the number f days befre the start f cnstructin that the NOI must be submitted; the acreage regulated by state permits; the permitting fee; the requirements fr inspectin and recrd keeping, which can include different inspectin frequencies and different inspectr qualificatins; the requirement fr sampling and mnitring discharges frm cnstructin sites; the requirement that a prfessinal engineer certify the SWPPP; and the public ntice requirement that in sme states mandates that the peratr pst a ntice f cnstructin in a public frum such as a lcal newspaper. Appendix A summarizes each state's general permit fr strm water discharges frm cnstructin activities. 2-8

28 CHAPTER 3 Preparing Strm Water Pllutin Preventin Plans fr Cnstructin Activities CHAPTER OBJECTIVES At the end f this chapter, the reader shuld understand the elements f an SWPPP and be able t identify apprpriate design references. This chapter utlines the steps that must be taken t prepare a basic SWPPP fr cnstructin activities r grund-disturbing activities. It is intended nly t utline the EPA's requirements fr a general permit and nt t prvide detailed design guidance fr preparing cmplex SWPPPs. USACE Engineering Circular N , Engineering and Design Handbk fr the Preparatin f Strm Water Pllutin Preventin Plans, prvides detailed guidance n preparing and designing mre cmplex SWPPPs. DEVELOPING AND IMPLEMENTING AN SWPPP FOR INSTALLATION-MANAGED PROJECTS Under the requirements f the NPDES permit fr strm water discharges frm cnstructin sites, the EPA and all authrized states require installatins t develp and implement SWPPPs fr all regulated cnstructin activities. In general, the prcess f develping an SWPPP fr cnstructin activities can be divided int the fllwing six steps: 1. Evaluate the site and develp the site plan. 2. Calculate the strm water runff fr precnstructin and pstcnstructin sites. 3. Select site cntrls and cmplete the site plan. 4. Certify the SWPPP and ntify the regulatrs and the public. 5. Implement cntrls and start cnstructin. 6. Stabilize the site, ntify the regulatrs, and stre the recrds. 3-1

29 Althugh cntractrs r USACE usually develp the site SWPPP, many installatins find it cst-effective t prepare basic plans using in-huse persnnel. The fllwing subsectins describe a six-step prcess that qualified installatin persnnel can fllw t prepare basic SWPPPs fr cnstructin sites. Evaluating the Site and Develping the Site Plan The first step in preparing an SWPPP fr a cnstructin site is t define the characteristics f the site and the type f cnstructin r grund-disturbing activity that will take place. This step is divided int fur tasks: cllect site infrmatin, develp the preliminary site plan, prepare a narrative descriptin f the cnstructin activity, and prepare the SWPPP site map. LLECT SITE INFORMATION It is necessary t cllect infrmatin abut the existing cnditins at the site. The EPA's general permit requires that the SWPPP include the fllwing infrmatin: A map f the existing cnditins at the site. That map will be the starting pint fr the site map required by the SWPPP. Thugh nt required by the general permit, it shuld be t scale, be tpgraphic, and indicate the existing land use (e.g., wded area, pen grassed area, pavement, and building) as well as the lcatin f surface waters (surface waters include wetlands, streams, rivers, lakes, pnds, etc.). Mst installatins have cmplete tpgraphic maps available at their ESO. If nt available at the installatin, then tpgraphic maps may be available frm the USACE district r the U.S. Gelgical Survey (USGS). USGS maps are the least desirable fr use as a site map fr an SWPPP because they are nly available in a large scale (1:24,000). The scale f the map used in an SWPPP shuld be small enugh t distinguish imprtant features such as drainage swales and cntrl measures. The types f sils present n the site. Any available infrmatin that describes the sil at a cnstructin site in the SWPPP is helpful. This infrmatin shuld be based n data frm the site rather than n reginal sil characteristics. The ESO r EO shuld have this infrmatin available frm previus reprts, sil brings, r general installatin recrds. If n infrmatin is available at the installatin, check with the Sil Cnservatin Service fr the site's sil infrmatin and maps f the area. Als, check if sil brings were cnducted fr the design f fundatins r ther structures at the site. The name f the bdy r bdies f water that will receive runff frm the cnstructin site. If the receiving water is a tributary, include the name f the receiving bdy f water if pssible. Receiving waters include creeks, runs, streams, rivers, lakes, wetlands, estuaries, and ceans. If the site drains int a separate municipal strm sewer system, identify the system and indicate 3-2

30 the receiving water t which the municipality discharges. Such infrmatin is usually available frm installatin, cunty, state, r USGS maps. Precipitatin data fr the site. Precipitatin infrmatin, ften referred t as "design strm," is necessary fr the design f strm water management measures. Design strms are typically described in terms f the average amunt f time that passes befre the same amunt f rain falls again and by the duratin f the rain event (e.g., the 10-year, 24-hur strm). The state r lcal strm water prgram agencies (as listed in Appendix A) can prvide the design strm criteria fr the specific site. Check with the installatin meterlgical ffice t btain rainfall data. If the installatin des nt have such an ffice, ther pssible surces f rainfall data include the fllwing: Natinal Weather Service, Five t 60-Minute Precipitatin Frequency fr the Eastern and Central United States, Technical Memrandum NWS HYDRO-35, Natinal Oceangraphic and Atmspheric Administratin, U.S. Department f Cmmerce, Maryland, Natinal Weather Service, Rainfall Frequency Atlas f the United States, Technical Paper N. 40, U.S. Department f Cmmerce, Washingtn, DC, Natinal Weather Service, Tw-t-Ten-Day Precipitatin fr Return Perids f 2 t 100 Years in the Cntiguus United States, Technical Paper N. 49, U.S. Department f Cmmerce, Washingtn, D.C., Existing runff water quality. Cllect any infrmatin that may be available n the quality f the runff frm the site. The general permit requires that such infrmatin, if cllected, be included in the SWPPP. In mst cases, there will be n water-quality data available frm runff cllected specifically frm a site. Hwever, in a few cases, water-quality data may have been cllected frm the site if it is lcated n r next t an industrial facility r if it drains t a separate municipal strm sewer in a city with a ppulatin greater than 100,000. Cntact either the installatin EO r the municipal strm sewer authrity that will receive the strm water frm the prpsed cnstructin site, and ask whether they have perfrmed any analyses n the strm water frm the site. DEVELOP THE PRELIMINARY SITE PLAN A preliminary site plan is usually develped fr cnstructin activities t assist planners in determining the prper site layut and the general sequence f events. This plan will frm the basis f the SWPPP site map. The prject/site planner can minimize the ultimate impact t lcal surface waters near the cnstructin activity by cnsidering the fllwing pllutin preventin principles: Disturb the smallest vegetated area pssible. 3-3

31 Keep the amunt f cut and fill t a minimum. Avid r limit impacts t sensitive areas such as steep and/r unstable slpes; surface waters, including wetlands; areas with erdible sils; and existing drainage channels. By meeting these bjectives, an installatin can reduce pllutin in strm water runff frm the site; at the same time, it can reduce cnstructin csts fr grading and landscaping, reduce the amunt f sediment and strm water management cntrls, and imprve the aesthetics f the cmpleted prject. PREPARE A NARRATIVE DESCRIPTION OF THE NSTRUCTION ACTIVITY Develp the preliminary site plan t include a narrative descriptin f the cnstructin activity in the SWPPP. The narrative shuld prvide a brief descriptin f the prject, including its purpse, the majr sil-disturbing activities that will be necessary t cmplete the prject, and the apprximate time it will take t cmplete the prject. When preparing the descriptin, use the fllwing general guidelines: Describe the purpse f the grund-disturbing activity (gal r prject result). Examples fr military installatins include the fllwing: ffice cnstructin, residential husing develpment, industrial facility cnstructin, rad cnstructin, parking lt, recreatinal areas, site remediatin activities, undergrund utility, r military training activities. List the sil-disturbing activities, including the fllwing: clearing and grubbing, excavatin and stckpiling, rugh grading, final area finish grading, preparatin fr seeding r planting, excavatin f trenches, and demlitin. The activity descriptins need nly address activities that will affect the quality f strm water. PREPARE AN SWPPP SITE MAP When the site plan fr the cnstructin prject is cmplete, this infrmatin shuld be transferred nt the SWPPP site map. Usually, the cnstructin site plan and the SWPPP site map are the same. Alng with the lcatin and identity f the surface waters, the map must shw the fllwing: Slpes after grading n the same map as the existing grades. Display the infrmatin as dashed lines fr existing tpgraphic cnturs and slid lines fr 3-4

32 prpsed tpgraphic cnturs. A map cntaining bth existing and prpsed cnturs clearly shws the areas that must be disturbed fr regrading. If the site map des nt cntain detailed tpgraphic infrmatin, examine the site plan and indicate the apprximate lcatin, directin, and steepness f slpes n the site map. Yu may use arrws (pinting frm high t lw) t indicate the lcatin and directin f the slpe. Indicate what the steepness f slpes will be after grading. Slpe steepness is usually expressed as a rati f the length (in feet) required t decrease ne ft in height (e.g., 2:1 indicates that it takes tw feet hrizntally fr the slpe t drp ne ft vertically). Entire area that mil be disturbed by the cnstructin activity. Indicate where the sil-disturbing activities will take place by drawing a "limit f disturbance" line n the site plan. The limit f disturbance line shuld be a clsed bundary arund the entire disturbed area s that any sil-disturbing activity will ccur inside the area frmed by the line. Include rads fr cnstructin vehicles unless thse rads are paved (r stabilized) and have measures t reduce tracking f sediments. When designating the area n the map, leave rm fr the cntrl structures. Als, designate any undisturbed areas lcated inside the limit f disturbance. Drainage patterns after the majr grading activities, including the lcatin f the discharge pints n the site map. Designate drainage bundary features n the site map. If pssible, use a tpgraphic site map that indicates drainage basin bundaries and drainage pipes. A drainage basin is an area f the site in which water drains t a cmmn utlet such as a strm drain pipe. Draw the drainage bundaries as clsed lines that start and end at the cmmn utlet. Typically the line will fllw the high pints t enclse an area that drains t the utlet. A site can have ne r mre drainage basins. The site map shuld indicate the drainage bundaries after the majr grading has ccurred r structural cntrls have been installed. If a tpgraphic site map is nt available, use arrws t indicate the directin in which water will flw. Shw the verland flw areas and the lcatin f swales r channels. Shw any new r prpsed undergrund strm drain system n the site, including the diameter f the pipe, its slpe, and discharge lcatin. Runff cntrls and sil stabilizatin. The gal f preparing the SWPPP is t cntrl runff. Therefre, the map is nt cmplete until it includes the lcatins f the majr cntrl structures and the majr stabilizatin areas. Calculating the Strm Water Runff fr Precnstructin and Pstcnstructin After identifying the characteristics f the site, the next step in develping an SWPPP is t calculate the final runff cefficient frm the site. The general permit requires that this cefficient be calculated fr the site cnditins after the cnstructin activity ccurs. This cefficient represents the amunt f strm water that becmes runff fr a particular land surface. Site engineers als will use 3-5

33 it t estimate the quantity f strm water runff frm the site and t select the site cntrls. The steps that shuld be fllwed t estimate the strm water runff frm a site include the fllwing: Measure the ttal and disturbed areas f the cnstructin site. Measure the area f the drainage basin that drains thrugh the site. Calculate the runff cefficients n the basis f the site cnditins befre and after the cnstructin. Estimate the quantity f strm water runff (site engineer shuld cmplete). MEASURE THE NSTRUCTION SITE AREA The SWPPP must include estimates f the ttal site area and the ttal disturbed area. The ttal area f the site usually is listed n the prject site plan. Include the entire area inside the prject's prperty bundaries, easements, and rights f way. Remember that the ttal area includes bth the disturbed and undisturbed areas. Next, measure the area that will be disturbed by the cnstructin activity. The net disturbed area is ften nted n the cnstructin site plan r the grading plan. It equals the area enclsed by the limit f disturbance line drawn n the site map minus any undisturbed areas within the limit f disturbance. Express the area infrmatin in acres runded t the nearest tenth f an acre (such as 16.5 acres f ttal site area and 5.4 acres f disturbed area). If this infrmatin is nt already nted n the site maps, it can be calculated using varius methds. The mst accurate methd f measuring it frm the site map is with a planimeter r digitizer. A planimeter is a device that can measure the area n a drawing by tracing its utline. Planimeters are available frm engineering and surveyr supply stres. A digitizer is an electrnic device that can be used t trace the utline f a shape n a drawing and transfer the crdinates f the shape t a cmputer, where a prgram (such as a cmputer-aided design prgram) can cmpute the enclsed area. One methd that prvides a gd estimate f the site area is the grid methd. This methd requires nly a transparent graph r grid paper and requires the fllwing steps: 1. Place the graph r grid paper ver the scale drawing and trace the utline f the entire prperty. 2. Cunt the ttal number f cmplete squares within the site area; cunt every tw partial squares alng the edges f the site as ne square. 3-6

34 3. T determine the area f the site in units f square inches, divide the ttal number f squares by the number f squares in ne square inch f grid paper. 4. T btain the estimate in units f square feet, multiply the result f step 3 by the number f square feet in a ne-inch square based n the scale f the drawing. 5. Divide the number f square feet n the site by 43,560. The result is an estimate f the site area in acres. (Repeat this methd using the utline f the disturbed area t find the estimated acreage f sil-disturbing activities.) MEASURE THE DRAINAGE BASINS Measure the area f each drainage basin in the cnstructin site. Althugh the SWPPP des nt list the size f each drainage area, site planners need that infrmatin t design the specific cntrls fr that basin (e.g., retentin pnds, sediment cntrls, and strm water runff cntrls). Use ne f the methds suggested previusly t measure the area f each land use in the drainage basins. The EPA general permit requires the use f a temprary r permanent sediment basin in any lcatin at which mre than 10 acres are disturbed at ne time. The sediment basin must prvide at least 3,600 cubic feet f strage fr every acre f land that it drains (flws frm upland areas that are undisturbed may be diverted arund the basin). CALCULATE THE RUNOFF EFFICIENT The next step in the assessment phase is t estimate the runff cefficient fr the final site cnditins and t recrd it n the NOI. The runff cefficient (C) represents the amunt f the ttal rainfall that becmes runff. Table 3-1 lists the different types f land uses and the assciated runff cefficient. The less rainfall absrbed (infiltrated) int the grund, evaprated, r therwise absrbed n site, the higher the C value. Fr example, the C value f a lawn area is 0.2, which means that nly 20 percent f the rainfall landing n that area will run ff, the rest will be absrbed r evaprate. A paved parking area wuld have a C value f 0.9, which means that 90 percent f the rainfall landing n that area will run ff. The C value calculated fr the SWPPP is the ne that represents the cnditin f the site after cnstructin is cmpleted. T determine the runff cefficients fr sites with mre than ne land use, calculate a weighted average n the basis f the area f the runff cefficients fr each land use. A frmula used t determine the weighted C is as fllws T A l C l +A 2 C A x C x rc C - A 1+ A A X ' [Ec l- 3-1] 3-7

35 Table 3-1. Runff Cefficients fr Varius Land Uses Land use descriptin Runff cefficients Business Dwntwn areas Neighbrhd areas Residential Single-family areas Multi units, detached Multi units, attached Residential (suburban) Apartment dwelling areas Industrial Light areas Heavy areas Parks, cemeteries Playgrunds Railrad yard areas Unimprved areas Streets Asphalt Cncrete Brick Drives and walks Rfs Lawns carse-textured sil (greater than 85 percent sand) Slpe: Flat, 2 percent Average: 2 t 7 percent Steep: 7 percent Lawns fine-textured sil (greater than 40 percent clay) Slpe: Flat, 2 percent Average: 2 t 7 percent Steep: 7 percent Surce: "Design and Cnstructin f Sanitary and Strm Sewers," American Sciety f Civil Engineers Manual f Practices,

36 where C = weighted C value fr the site, A = area in acres f each majr land surface type, C = existing runff cefficient fr each majr land surface type, and x = number f different land surface types. Example calculatin: An unimprved lt cntaining 20 acres will be cnverted int an apartment cmplex. The final site will cntain 6 acres f apartment dwellings, 4 acres f paved areas, and 10 acres f unimprved areas. Therefre, using the average values frm Table 3-1, the weighted C fr the final site is calculated as fllws: g (6)(0.6) +(4X0.8) + (10X0.2) ESTIMATE THE QUANTITY OF STORM WATER RUNOFF One methd used fr calculating the flw rate f strm water runff is the "ratinal methd," which uses the frmula: Q = CxIxA, [Eq.3-2] where Q = the rate f runff frm an area (cubic feet per secnd), I = rainfall intensity (inches per hur), and A = area f the drainage basin (acres). Many methds can be used t estimate the amunt f runff frm a site. The EPA des nt require the use f the ratinal methd t design strm water cnveyances r management measures. Hwever, state r lcal design guides may describe specific methds fr estimating design flw rates frm each cnstructin activity n the basis f its size. 3-9

37 Selecting Site Cntrls and Cmpleting the SWPPP After estimating the strm water runff frm the site, the site engineer (a cntractr, USACE district engineer, r installatin engineer) will select and design the site cntrls. When selecting the cntrls, the site engineer shuld fllw these steps: Review and incrprate state and lcal requirements. Select bth the temprary and permanent ersin and sediment cntrls. Select ther, nnstructural pllutin preventin measures. Indicate lcatin f cntrls n the site map. Prepare an inspectin and maintenance plan. Prepare a descriptin f cntrls. Prepare the sequence f majr events. The fllwing subsectins expand n each f these steps. Hwever, this infrmatin is nly intended t prvide a general verview f the steps invlved in selecting site cntrls. It is nt t be used as a design reference. Ensure that the site cntrls are selected and designed by a qualified engineer familiar with the EPA's general permit requirements and the Engineering Circular N , Engineering and Design Handbk fr the Preparatin f Strm Water Pllutin Preventin Plans, prepared by the USACE. REVIEW AND INRPORATE STATE AND LOCAL REQUIREMENTS Many states and lcal authrities have sediment and ersin cntrl r strm water management regulatins in place. The NPDES strm water permit is nt intended t supersede state r lcal requirements. Instead, it ensures that site peratrs prvide a minimum level f pllutin preventin. Furthermre, the EPA general permit specifically instructs all permittees t meet state and lcal requirements. Cnsult state r lcal authrities t determine what, if any, requirements exist fr sediment and ersin cntrl n cnstructin prjects. Many states and lcal authrities prvide their wn design manuals r guidance t assist in preparing a plan that meets their requirements. If the state r lcal authrity requires review and apprval f the sediment and ersin cntrl plan, attach an apprved cpy f that plan with the SWPPP. Appendix A lists the state POCs fr cnstructin issues. Althugh many f the prvisins f the Federal EPA's NPDES strm water permits fr cnstructin activities are cnsistent with mst state and lcal 3-10

38 requirements, differences may exist in the specific requirements fr cntrl measures. When a difference ccurs in EPA, state, and lcal requirements, fllw the mre stringent requirement. SELECT THE TEMPORARY AND PERMANENT EROSION AND SEDIMENT NTROLS The SWPPP must include a descriptin f bth the temprary and permanent cntrl measures. The site engineer must describe the temprary r permanent sil ersin and sediment cntrl practices in the SWPPP. When selecting the cntrl measures, incrprate the fllwing bjectives: Stabilize the sil. Minimize the amunt f disturbed sil, using stabilizatin practices such as permanent seeding, sd stabilizatin, getextile stabilizatin, reinfrced sil-retaining systems, r gabins. Under the Federal EPA's general permit, disturbed areas f the cnstructin site that will nt be redisturbed fr 21 days r mre must be stabilized by the 14th day after the last disturbance. The permit als requires the installatin f silt fabric fences fr all slpe and dwn-slpe site bundaries. Hwever, n ther structural practices are required fr a site f less than 10 acres if a sediment basin with a vlume f 3,600 cubic feet per acre f drainage area is prvided. Dissipate flw velcity. Minimize the runff flw acrss the site using measures such as check dams and surface rughening. The EPA general permit requires this fr all regulated cnstructin activities. Manage strm water. Prevent runff frm ff-site areas frm flwing acrss disturbed areas, using measures such as earth dike, drainage swales, and pipe slpe drains. Capture sediment. Remve sediment frm n-site runff befre it leaves the site, using measures such as silt fences, straw bale barriers, sediment traps, strm drain-inlet prtectin, and brush barriers. Temprary Site Cntrls Temprary site cntrls are nly in place during the cnstructin activity. The selectin f the mst apprpriate temprary site cntrls is dependent n the nature f the cnstructin activity and the characteristics f the site. An excellent reference is Technical Reprt EP-93/06, A Summary f Best Management Practices fr Nn-Pint Surce Pllutin, prepared by the U.S. Army Cnstructin Engineering Research Labratry (USACERL). Anther excellent reference is the Engineering Circular N Appendix C f this dcument prvides additinal references and rdering infrmatin. 3-11

39 Permanent Site Cntrls Permanent strm water management cntrls are cnstructed and left in place t cntrl pllutin f strm water after the cnstructin is cmpleted. Very little specific guidance is available frm the EPA as t what will meet the requirements fr strm water management cntrls. They may be the same as the temprary ersin and sediment cntrl measures. In additin t ersin cntrl, many state and lcal regulatins require that the permanent cntrls restrict the pstcnstructin runff rate t the precnstructin flw rate fr a given design strm. If n lcal guidance is available n the type f permanent strm water management cntrls, refer t the USACE and USACERL dcuments fr BMP guidance and design criteria. Generally, permanent cntrls include strm water detentin structures (including wet pnds); strm water retentin structures; pen vegetated swales; natural depressins; infiltratin measures; and velcity dissipatin measures, such as utlet prtectin. SELECT OTHER POLLUTION PREVENTION MEASURES The SWPPP must include infrmatin abut "gd husekeeping and sanitatin" cntrls fr ther ptential pllutant surces that may exist n a particular cnstructin site. Pllutants, ther than sil, that may enter the strm water frm cnstructin sites include fuel ils, such as gasline, diesel il, hydraulic fluid, mtr lubricants, and clants; paints, slvents, detergents, and sealants; cnstructin litter and debris; and fertilizers and pesticides. The SWPPP shuld list all pllutants t be used at the site that have a reasnable ptential t cntaminate strm water runff. Site planners can use this list as a guide t designate areas fr equipment maintenance, prvide fr strage f chemicals, plan fr adequate waste receptacles, and schedule rutine waste cllectin. 3-12

40 INDICATE THE LOCATION OF NTROLS ON THE SITE MAP Indicate the lcatin f each measure used fr ersin and sediment cntrl and strm water management n the site map. Gd husekeeping and sanitatin cntrls, hwever, d nt have t be shwn n the site map. After indicating the cntrls n the site map, check the initial limit f disturbance and /r the drainage bundaries t see if they need t be revised. Diversin structures ften change the drainage bundaries by diverting runff frm ne drainage basin t anther. Therefre, the drainage patterns n the SWPPP site map must reflect the final site drainage patterns. The final SWPPP site map must shw drainage patterns, apprximate slpes after grading, areas f sil disturbance, lcatin f majr structural and nnstructural cntrls, and lcatin f surface waters. PREPARE AN INSPECTION AND MAINTENANCE PLAN The general permit requires that an peratr prepare a descriptin f the prcedures in place t maintain the pllutin preventin measures n site. These cntrls must be in gd perating cnditin until the area they prtect has been cmpletely stabilized r the cnstructin prject is cmpleted. The EPA's general permit requires that peratrs (r qualified individuals) inspect the cntrls nce every seven days and within 24 hurs after a rainfall with an intensity greater than 0.5 inches. Appendix A summarizes the difference in inspectin requirements between Federal and state permits. (Nte: Sme states have specific definitins f what qualifies a persn t inspect the site cntrls [e.g., Michigan].) A gd inspectin plan shuld address areas t be inspected and maintained, cntrl measures t be inspected and maintained, inspectin schedule, maintenance prcedures, inspectin and maintenance frms, names f inspectrs (r titles), and inspectr qualificatins. 3-13

41 Prepare an inspectin and maintenance checklist that addresses each f the cntrl measures prpsed fr the facility. Include blank cpies f the checklist in the SWPPP and make it available n site. The inspectr shuld cmplete a cpy f a new checklist during each inspectin. Cnsult state r lcal manuals fr specific maintenance requirements. Appendix D cntains sample checklists fr the inspectin and maintenance required by the SWPPP. DESCRIBE NTROLS After planning the cnstructin activities and selecting the cntrls, prepare a list f each type f cntrl planned fr the site. Include in that list a descriptin f each cntrl, its purpse, and why it is apprpriate in this lcatin. The descriptin shuld als include specific design infrmatin such as size, retentin capacity, materials, and methds f cnstructin. DESCRIBE THE SEQUENCE OF MAJOR ACTIVITIES Prepare a brief descriptin f majr activities required in the cnstructin f cntrl measures, sil-disturbing activities, and maintenance activities fr cntrl measures. List these activities in the rder in which they will ccur. Specific timing requirements fr installatin and maintenance f cntrl measures will depend upn the cnstructin activities. Hwever, cnsider several general principles when develping the sequence f majr activities: Install dwn-slpe and side-slpe perimeter cntrls befre starting a landdisturbing activity. Disturb the smallest area pssible and nly when necessary t prceed with cnstructin. Cver r stabilize disturbed land as sn as pssible. Time activities t limit the effect f seasnal climate changes r weather events. Delay cnstructin f infiltratin measures t the end f the cnstructin prject when upstream drainage areas have been stabilized. D nt remve temprary perimeter cntrls until after all upstream areas are stabilized. Certifying the SWPPP and Ntifying the Regulatrs and Public The installatin (r Crps district) must certify the SWPPP and submit an NOI t the apprpriate agencies nce they have cmpleted the site descriptin and cntrl sectins. The checklist prvided in Appendix D can be useful in 3-14

42 evaluating whether all the required items are included in the cnstructin SWPPP prir t certifying the plan r submitting an NOI. CERTIFY THE SWPPP The EPA's general permit requires that an authrized representative f each peratr sign and certify the plan t ensure that the SWPPP is cmpletely develped and adequately implemented. The representative shuld be at r near the tp f the chain f cmmand, such as an installatin cmmander, USACE district engineer, r smene wh has been delegated the authrity t sign and certify this type f dcument (Chief, installatin engineer, r prject fficer). In signing the plan, the authrized representative certifies that the infrmatin is accurate and assumes liability fr the plan. Typically, cnstructin cntractrs r subcntractrs are respnsible fr implementing the cntrls specified in the plan but may nt have the authrity t design r mdify the plan. Many NPDES permits require that thse cntractrs certify that they understand the requirements f the permit and the plan and will implement the measures fr which they are respnsible. Appendix D cntains a sample cntractr's certificatin letter. SUBMIT THE NOTICE OF INTENT The EPA's general permit fr strm water discharges frm cnstructin activities requires that an peratr (either the installatin engineer r Crp district engineer) submit an NOI at least tw days prir t beginning cnstructin. Since state permits have different requirements, cnsult the permit (summarized in Appendix A) t determine the exact deadline fr submitting an NOI. The site peratr must cmplete the SWPPP befre submitting the NOI. In cases in which mre than ne party meets the definitin f an "peratr" f a cnstructin activity, all thse parties may need t submit an NOI and becme cpermittees. SUBMIT THE SWPPP FOR REGULATORY REVIEW Sme state NPDES strm water permits fr cnstructin activities require the site peratr t submit the SWPPPs t the regulatrs fr review. Hwever, the EPA general permit merely requires that plans be maintained n site. Permitting authrities may prefer nt t receive the permits in rder t reduce the administrative burden f reviewing a large number f SWPPPs. Appendix A cntains a list f the states that require the SWPPP with the NOI. The EPA als reserves the right t review the SWPPP. When the EPA requests the SWPPP, permittees shuld submit it in a timely manner. When requested, they shuld als submit their plan t state r lcal sediment and ersin r strm water management agencies r t a municipal peratr when 3-15

43 the site discharges water thrugh an NPDES strm water permitted separate municipal strm sewer system. Examine each permit carefully t determine the requirements fr submitting plans the facility must fllw. Implementing Cntrls and Starting Cnstructin MAINTAIN THE SWPPP AT THE SITE The EPA's general permit requires that a cpy f the SWPPP be kept at the cnstructin site frm the time cnstructin begins until the site is finally stabilized. Bth the general cntractr and the installatin shuld maintain a cpy f the SWPPP since it may be mdified during the cnstructin activity. Ntify the site peratr f any changes and update the SWPPP. While maintaining the SWPPP n site, cmpile all recrds and supprting dcuments in an rderly fashin since EPA's general permit requires that all recrds be stred fr three years after prject cmpletin. This prvisin ensures that all recrds will be available in case a legal situatin arises fr which dcumentatin is necessary. Refer back t the recrd-keeping discussin in Chapter 2 f this reprt. IMPLEMENT NTROLS After cmpleting the SWPPP and submitting the NOI, the site peratr can begin cnstructin activities. Hwever, the peratr is nw bligated t implement the cntents f the SWPPP. The first step is t cnstruct r apply the specific cntrl measures in accrdance with state r lcal specificatins. If state r lcal specificatins fr cntrl measures d nt exist, cnstruct the cntrls accrding t USACE Engineering Circular N This dcument lists typical design standards fr structural cntrl measures. Cnstruct the cntrl measures and apply the stabilizatin measures in the rder indicated in the sequence f majr activities. Ensure that wrk crews wh install the measures are trained t install and implement site cntrls crrectly. Imprperly installed cntrls can have little r n effect and may increase the rate f ersin. All ther wrkers n the cnstructin site shuld be made aware f the cntrls s that they d nt inadvertently disturb r remve them. INSPECT AND MAINTAIN NTROLS Inspectin and maintenance f the cntrl measures are actins that are as imprtant t pllutin preventin as prper planning and design. Site peratrs (r designated inspectrs) must inspect the cntrl measures at the frequency specified in the SWPPP r the permit. EPA's general permit requires an 3-16

44 inspectin every seven days r within 24 hurs f a strm with an intensity f 0.5 inches r greater in a 24-hur perid. Operatrs must inspect all disturbed areas f the site, areas fr material strage, lcatins at which vehicles enter and exit the site, and all the ersin and sediment cntrls. The inspectr shuld lk at each measure t determine whether it is still effective based n the descriptin included in the SWPPP. USACE prvides sample checklists fr specific BMPs in Engineering Circular N The inspectr shuld lk fr three basic things when inspecting a pllutin preventin measure: Whether the measure was installed prperly Whether the measure has been damaged since it was installed What steps are necessary t crrect any prblems with the measure. The inspectr must recrd any damages r deficiencies in the cntrl measures n the inspectin reprt frm prvided fr that purpse (Appendix D cntains sample reprt frms). These reprts dcument the inspectin f pllutin preventin measures. The peratr shuld crrect damage r deficiencies as sn as practicable after the inspectin but certainly in less than seven days after inspectin. States have specific criteria fr inspectins, inspectr qualificatins, and the frequency fr cnducting inspectins. Appendix A cntains a summary f the state inspectin requirements. MAINTAIN A RERD OF NSTRUCTION ACTIVITIES Althugh nt required by the general permit, the site peratr shuld maintain a recrd f the majr site activities. This shuld include the dates when majr grading ccurs in a particular area, the dates when activities cease in an area, and the date when an area is stabilized. UPDATE AND CHANGE THE PLAN Update and change the SWPPP s that it accurately reflects any changes that ccur during the cnstructin prcess. If, at any time during the effective perid f the permit, the permitting authrity finds that the SWPPP des nt meet minimum standards r accurately reflect the cnstructin activity, it will ntify the permittees f required changes needed t bring it up t standard. REPORT RELEASES OF REPORTABLE QUANTITIES Cnstructin activities may handle certain hazardus substances in amunts that equal r exceed reprtable quantity (RQ) levels. The RQ levels and the assciated regulatins can be fund in 40 CFR Parts 110, 117, and

45 Besides these regulatins, the installatin spill cntingency plan (ISCP) cntains required respnse actins, site POCs, and phne numbers. PROVIDE PUBLIC ACCESS TO THE SWPPP The SWPPP and related dcuments are cnsidered t be reprts in accrdance with Sectin 308(b) f the CWA, thugh permittees may nt have t submit them t EPA r any ther regulatry agency. Under the Freedm f Infrmatin Act, site peratrs must make them available fr public review. Stabilizing the Site, Ntifying the Regulatrs, and String Recrds The NPDES permit remains in effect as lng as there exists a strm water discharge assciated with cnstructin activity. The need fr a permit may end because the strm water discharge is eliminated; but, mre cmmnly, the need fr a permit ends when the cnstructin and final stabilizatin are cmpleted. Final stabilizatin requirements vary frm permit t permit. When strm water discharges assciated with a cnstructin activity cease, the wner/peratr f the facility must cease permit cverage by submitting an NOT. The EPA requires site peratrs t retain cpies f the SWPPP and all ther reprts (including the NOI) fr three years after final site stabilizatin. STABILIZE THE SITE After cmpleting cnstructin activities, the site peratr must stabilize the site accrding t the SWPPP. Final site stabilizatin is defined by the EPA's general permit as cmpletin f all sil-disturbing activities at the site and the establishment f a unifrm perennial vegetative cver with a density f 70 percent f the cver fr unpaved areas nt cvered by permanent structures, r the emplyment f equivalent permanent stabilizatin measures (such as the use f riprap, gabins, r getextiles). PREPARE AND SEND NOTICE OF TERMINATION Once the site is stabilized r the site peratr has changed, the installatin must submit an NOT t the apprpriate agency. Infrmatin required in the NOT includes the lcatin f the cnstructin site; the name, address, and telephne number f the peratr terminating cverage; the NPDES general permit number; an indicatin f why cverage under the permit shuld be terminated fr the peratr; and a signed certificatin statement. When a change in peratrs (i.e., general cntractrs) ccurs at a cnstructin activity, EPA requires the new peratr t submit an NOI at least tw days befre the change. Appendix D cntains a sample NOT letter. 3-18

46 STORE THE RERDS The installatin will have t maintain recrds fr each permitted activity fr three years after the NOT submissin date. Therefre, ensure that the site crdinatr (cntractr r Crp district engineer) submits a final cpy f the site recrds as detailed in Chapter 1 f this dcument. Fr rganizatin purpses, maintain the recrds in a binder and nte n the spine f the binder the NPDES permit number, cnstructin activity title, and the cnstructin dates. This will facilitate data strage and data retrieval. 3-19

47 APPENDIX A Summary f State and Federal General Permits fr Strm Water Discharges Assciated with Cnstructin Activity 1996

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51 s gl i E POC name slephne nu SWPPP P.E. Cert. O cö IO LO 00 c 0 i LO i 1 c LO h- LO LO LO _l c ST 5- ST E 51 a> O 5 LO C r^. a> - a> 2= C ^ C _ r-- ^ r-~ r~- X < m C c w* ^-^ ~ -r- 2 LO ge c c c c" 12 i "? "c u > E _c F "* 5 LO a > cö ^ "* - k_ 3 Ä "> S 00 r-- O C5 _J *- E c < 3 h- 5^ r- ^-* #-* ^ C ' * >-, ^ ^^ TJ r-- LL c c >.c <* <5 * c c r- 3 >>i- O T- 1 V ^ LU Is. Ö s. m ' > 5 5SS r^ *:* O O Z z z z z z z z z z z z E CB u c E c D > c. O c JO - ublic tice uired k. 03 C- T3 z >- z z z z Z z z Z Z z -5.2 O "c z Z z z z >- z z z z z z 5T 2 c ~. LL LL LL. LI- LL LL LL LL LL LL LL * cc.>. cr ct LT rr rr rr rr rr rr rr Site pecti hedu * "cö t <* * t * <* * * *3- «aa 1 1 i i 3 C C X. ict c 5 < g ^ T g ^ v- 1, ' r,, T ~ ~ **" "I a. ~ -a ^ Permi cvere area (acres c3. c<. f s pri> cnjcti 1 due c^- O n i- Installati required submi SWPP with NO LO OS- O «3- Z Z z Z z <d- </* *fr z «s IO LO lo LO LO < O z z O LO O z O z > > LO LO lo LO LO IO O Z 1 IO lo O O z c _ <>- >. Whh Feder facilit authri < -3 < > O Q X < rr < O z z Z 0. s LU 0. LU z 0. LU >- >- c IO z O 0_ c r» r»- f-- r-- <* r-- r- 00 r- > C» C» O) > Öl > a> O) c» c» a> ' ts <D > *~ O Tf C3>.i: <0 O T Q.-0 X LU t c3 T Ö O) ^ 05 Ö c»,,,_ " T ~ O ' r ~ O ** X -3 2 > O Q X *. OC < E Ü z z z z Z z O a. g % _ 0-2 C SI D) < a- 0. LU 03 c - 3 0> c _:.E c S?1 O 3 *' O "g & f i Ü!»; <B c E» S 2 c c g 3 ^r" *r l cr c > c 2 c 3= 2» 11 II z 11 ja 10 2 ^ LL C3 C M O g i i.- LU S.- c >. O < = S.2 - " Ü O ±*~is C <s. E g 0» 1 2 LU.2 11 s < Q- 2 LU Q. c II 2 LU *.0 ^-_ ' t: c J2 c " c ti OS.. Ä? O - es cö E > a > e ^~ ^ O 2 X. c ill «9 a. 0. S S -c O) *.E & 1 i= CJ «TJ c m Q O) IO d O c S 5 > *= t c c.2 > 5 11 S p < A= m a E O c S ä p (ft 4= 5 c -» y) 2 Z = let p O c I S 2 2 «c & <n P g. T3 s: ' g s. O «= t5 ) - i_ =. O- «a us 5 c A-6

52 a "45 u 1 a u 0 «s u Q 1 ieral Genet ed) «a taryfstt ity 199i POC name and telephne number SWPPP P.E. Cert. Public ntice required? Are samples required? Site inspectin schedule 0- Permit cvered area (acres) N. f days prir t cnstructin NOI due? Installatin required t submit SWPPP with NOI? Wh has Federal facility authrity? Vern Barry, (303) z z 0 0 z z O "c Z 1WK-24RF Tm Rehm, (615) /0625 1WK-24RF 0 0 z z Wren Stenger/Brent Larsen, (214) z 0 z 0 z LL DC "* 1 0 z Marck Schmidtz, (801) T Table Sumtt Activ 0 «S.± t Q.T5 X LU Tdd Sternbach, (802) Bert Tuxfrd, (804) Kathy Cllins, (206) Lyle Bennett, (304) z z z z z z z z z z z z z z z 1WK-24RF 1 t 1WK-24RF 1WK-24RF 1WK-24RF 1WK-24RF 8 0 g 0 fc Z g Z JO Jim Helm/Rick Ddds, (608) z 0 z 0 z LL DC >* «9- LO LO LO LO IO LO IO LO LO «> ^ g -* O O O z z EPA-8 10/01/97 TN 10/01/97 Q Z r- O Z < Q. LU 1^cn 0 O O O O!2 z z z z UT EPA-1 VA EPA-10 WV r>~ r» r>- r*- 1*- 0> 0> O) > 01 0 ^ cvi cs fi > O O) 0> O z i Q X»- => > > 5 Jhn Wagner, (307) z 0 z 0 z LL DC 1 O Z O z > r>- O) 0 > 5.2 &,, -tea - c 0 C8 *3 O OO 5r > <D 80 c «f 0 e.2 0 S * <» S 0 E E> c 0 S c OB s -*» ^.2 S 8 8 ' * i's II O cj t *: rf J= O j2 «8 w Q. b O S r cj 1 sl ~ a.*- c -a 2 c -2 0 aj t: 3 E. C? j < D- 3 LU 5 " c 0 «5 _- ««,»» _ 2> 2 c 0. 'S O- Eg 0«i»s i s <= > A, 11 2 ff S " is 15 LU X* >; = m 0 *; ^ c c 'S* cö 5 c O Q. 0 SO cö ~ - - "g 3.2 <D ~ 2 C <D " " » E D) 3 cj " '> g t3 E> S " i s ni «a s= is cm» "-S C! O - - «S» E»c»! -- =22 ^ O t 'S 5 O P 0 S.g c 5 E > > i5 2 Egg O < O - «H.2 30 frth. an. N permits r fees are required. years, and nt cntrl pi 3 0.s "- T3 0 c.2 3 <» -^ T3 5- k_ c 1 8 I 5 «IC O fee is $200 fr five ye, f land are required t a five-year fixed perid. Fr the first year, the mre than ne acre, but less than three acres nd gegraphic lcatin. Fee is prrated ver Prjects that disturb Based n acreage a A-7

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54 APPENDIX B Sample Cnstructin Pllutin Preventin Plan

55 Sample Cnstructin Pllutin Preventin Plan The fllwing infrmatin was extracted frm the U.S. Envirnmental Prtectin Agency, Strm Water Management fr Cnstructin Activities: Develping Pllutin Preventin Plans and Best Management Practices, EPA Reprt N. EPA/833/R-92/005, Octber B-3

56 HOMERVILLE APARTMENTS NSTRUCTION POLLUTION PREVENTION PLAN Prject-Name and Lcatin: (Latitude, Lngitude, r Address) Descriptin: (Purpse :and; Types f Sil Disturbing Activities) Hmerviiie Apartments 21 Bradview Avenue Center City, ANY State SITE DESCRIPTION Owner Name and Address: Quality Assciates 11 Main Street Center City, ANY State This prject will cnsist f three lw-rise, attached apartment buildings with adjacent parking facilities. Sil disturbing activities will include: clearing and grubbing; installing a stabilized cnstructin entrance, perimeter, and ther ersin and sediment cntrls; grading; excavatin fr the sedimentatin pnd, strm sewer, utilities, and.building fundatins; cnstructin f curb and gutter, rad, and parking areas; and preparatin fr final planting and seeding. Runff Cefficient: The final cefficient f runff fr the site will be c = 0.5. Site Area: The site is apprximately 11.0 acres f which 9.8 acres will be disturbed by cnstructin activities. Sequence f Majr Activities The rder f activities will be as fllws: 1. Install stabilized cnstructin entrance 2. Clear and grub fr earth dike and sediment basin 3. Install earth dike 4. Cnstruct sedimentatin basin 5. Cntinue clearing and grading 6. Pile tpsil 7. Stabilize denuded areas and stckpiles within 14 days f last cnstructin activity in that area 8. Install utilities, strm sewer, curb and gutter Name f Receiving Waters: The entire site will drain int Rcky yards frm the site. NTROLS Ersin and Sediment Cntrls Stabilizatin Practices 9. Apply stne t parking area and rad 10. Cnstruct apartment buildings 11. Cmplete grading and install permanent seeding and plantings 12. Cmplete final paving 13. Remve accumulated sediment frm basin. 14. When all cnstructin activity is cmplete and the site is stabilized, remve earth dike and reseed any areas disturbed by their remval. Creek which is apprximately ne hundred Temprary Stabilizatin - Tp su stck piles and disturbed prtins f the site where cnstructin activity temprarily ceases fr at least 21 days will be stabilized with temprary seed and mulch n later than 14 days frm the last cnstructin activity in that area. The temprary seed shall be Rye (grain) applied at the rate f 120 punds per acre. Prir t seeding, 2,000 punds f grund agricultural limestne and 1,000 punds f fertilizer shall be applied t each acre t be stabilized. After seeding, each area shall be mulched with 4,000 punds per acre f straw. The straw mulch is t be tacked int place by a disk with blades set nearly straight. Areas f the site which are t be paved will be temprarily stabilized by applying getextile and stne sub-base until bituminus pavement can be applied. Permanent Stabilizatin - Disturbed prtins f the site where cnstructin activities permanently ceases shall be stabilized with permanent seed n later than 14 days after the last cnstructin activity. The permanent seed mix shall cnsist f 80 lbs/acre tall fescue, and 40 lbs/acre kbe lespedeza. Prir t seeding, 4,000 punds f grund agricultural limestne and 2,000 punds f fertilizer shall be applied t each acre t be stabilized. After seeding, each area shall be mulched with 4,000 punds per acre f straw. The straw mulch is t be tacked int place by a disk with blades set nearly straight. B-5

57 3 Earth Dike - will be cnstructed alng the uphill erimeter (nrth) f the site. A prtin f the dike will divert' runn arund the cnstructin site. The remaining prtin f the dike will cllect runff frm the disturbed area and direct the runff t the sediment basin. NTROLS (Cntinued) Structural Practices Sediment Basin - will be cnstructed at the cmmn drainage lcatin n the suth side f the cnstructin site. The basin will be frmed by cnstructing an embankment acrss an existing gully and excavating a strage pnd with a vlume f 36,000 cubic feet (0.82) acre feet. The basin will drain thrugh a crrugated metal riser and utlet pipe t a rip rap utlet aprn. Once cnstructin activities are nearly cmplete, the accumulated sediment will be remved frm the basin. ^ Strm Water Management Strm water drainage will be prvided by curb and gutter, strm sewer and catch basin, fr the develped areas. The areas which are nt develped will be graded at less that 0.5:1 and have permanent seeding r plantings. Tw acres f the site will remain untuched and in its natural State. When cnstructin is cmplete the entire site will drain t a wet detentin basin. The wet detentin basin will be in the lcatin f the temprary sediment basin. When upslpe areas are stabilized, the accumulated sediment will be remved frm the sediment basin, and the areas n the sides f the basin will be planted with vegetatin. The wet detentin pnd : designed with a permanent pl vlume f 0.82 (acre-feet). This is equivalent t ne inch f runff fr the entire drainage area. It is expected that this wet detentin pnd design will result in an 80 percent remval f ttal suspended slids frm the site's strm water runff. The pnd has been designed by a prfessinal engineer t keep peak flw rates frm the tw and ten year/24 hur strms at their pre-develpment rates. The utlet f the detentin basin will be stabilized by a riprap aprn. Waste Dispsal: OTHER NTROLS Waste Materials All waste materials will be cllected and stred in a securely lidded metal dumpster rented frm the ADF Wasf Management Cmpany, which is a licensed slid waste management cmpany in Center City. The dumpster will meet all lcal Center City and any State slid waste management regulatins. All trash and cnstructin debris frm the site will be depsited in the dumpster. The dumpster will be emptied a minimum f twice per week r mre ften if necessary, and the trash will be hauled t the Center City Dump. N cnstructin waste materials will be buried nsite. All persnnel will be instructed regarding the crrect prcedure fr waste dispsal. Ntices stating these practices will be psted in the ffice trailer and Mr. De, the individual wh manages the day-t-day site peratins, will be respnsible fr seeing that these prcedures are fllwed. Hazardus Waste All hazardus waste materials will be dispsed f in the manner specified by lcal r State regulatin r by the manufacturer. Site persnnel will be instructed in these practices and Mr. De, the individual wh manages day-t-day site peratins, will be respnsible fr seeing that these practices are fllwed. Sanitary Waste All sanitary waste will be cllected frm the prtable units a minimum f three times per week by the TIDEE Cmpany, a licensed Center City sanitary waste management cntractr, as required by lcal regulatin. Offsite Vehicle Tracking: A stabilized cnstructin entrance has been prvided t help reduce vehicle tracking f sediments. The paved street adjacent t the site entrance will be swept daily t remve any excess mud, dirt r rck tracked frm the site. Dump trucks hauling material frm the cnstructin site will be cvered with a tarpaulin. B-6

58 TIMING OF NTROLS/MEASURES As indicated in the Sequence f Majr Activities, the earth dike, stabilized cnstructin entrance and sediment basin will be cnstructed prir t clearing r grading f any ther prtins f the site. Areas where cnstructin activity temprarily ceases fr mre than 21 days will be stabilized with a temprary seed and mulch within 14 days f the last disturbance. Once cnstructin activity ceases permanently in an area that area will be stabilized with permanent seed and mulch. After the entire site is stabilized, the accumulated sediment will be remved frm the trap and the earth dike will be remved. CERTIFICATION OF MPLIANCE WITH FEDERAL, State, AND LOCAL REGULATIONS The strm water pllutin preventin plan reflects Center City requirements fr strm water management and ersin and sediment cntrl, as established in Center City rdinance T ensure cmpliance this plan was prepared in accrdance with the Center Citv Strm Water Management. Ersin and Sediment Cntrl Handbk, published by the Center City Department f Planning, Strm Water Management Sectin. There are n ther applicable State r Federal requirements fr sediment and ersin site plans (r permits) r strm water management site plans (r permits) MAINTENANCE/INSPECTION PROCEDURES Ersin and Sediment Cntrl Inspectin and Maintenance Practices These are the inspectin and maintenance practices that will be used t maintain ersin and sediment cntrls. Less than ne half f the site will be denuded at ne time. All cntrl measures will be inspected at least nce each week and fllwing any strm event f 0 5 inches r greater. All measures will be maintained in gd wrking rder; if a repair is necessary, it will be initiated within z4 hurs f reprt. Built up sediment will be remved frm silt fence when it has reached ne-third the height f the fence. Silt fence will be inspected fr depth f sediment, tears, t see if the fabric is securely attached t the fence psts, and t see that the fence psts are firmly in the grund. The sediment basin will be inspected fr depth f sediment, and built up sediment will be remved when it reaches 10 percent f the design capacity r at the end f the jb. Diversin dike will be inspected and any breaches prmptly repaired. Temprary and permanent seeding and planting will be inspected fr bare spts, washuts, and healthv grwth. ' A maintenance inspectin reprt will be made after each inspectin. A cpy f the reprt frm t be cmpleted by the inspectr is attached. Mr. De, site superintendent, will select three individuals wh will be respnsible fr inspectins maintenance and repair activities, and filling ut the inspectin and maintenance reprt. Persnnel selected fr inspectin and maintenance respnsibilities will receive training frm Mr De I hey will be trained in all the inspectin and maintenance practices necessary fr keeping the ersin and sediment cntrls used nsite in gd wrking rder. B-7

59 MAINTENANCE/INSPECTION PROCEDURES (Cntinued) Nn-Strm Water Discharges It is expected that the fllwing nn-strm water discharges will ccur frm the site during the cnstructin perid: Water frm water line flushings. Pavement wash waters (where n spills r saks f txic r hazardus materials have ccurred). Uncntaminated grund water (frm de watering excavatin). All nn-strm water discharges will be directed t the sediment basin prir t discharge. B-8

60 INVENTORY FOR POLLUTION PREVENTION PLAN The materials r substances listed belw are expected t be present nsite during cnstructin: Cncrete Fertilizers Detergents. Petrleum Based Prducts Paints (enamel and latex) Cleaning Slvents Metal Studs Wd Cncrete Masnry Blck Tar Rfing Shingles. SPILL PREVENTION Material Management Practices The fllwing are the material management practices that will be used t reduce the risk f spills r ther accidental expsure f materials and substances t strm water runff. Gd Husekeeping: The fllwing gd husekeeping practices will be fllwed nsite during the cnstructin prject. An effrt will be made t stre nly enugh prduct required t d the jb All materials stred nsite will be stred in a neat, rderly manner in their apprpriate cntainers and, if pssible, under a rf r ther enclsure Prducts will be kept in their riginal cntainers with the riginal manufacturer's label Substances will nt be mixed with ne anther unless recmmended by the manufacturer Whenever pssible, all f a prduct will be used up befre dispsing f the cntainer Manufacturers' recmmendatins fr prper use and dispsal will be fllwed The site superintendent will inspect daily t ensure prper use and dispsal f materials nsite. Hazardus Prducts: These practices are used t reduce the risks assciated with hazardus materials. Prducts will be kept in riginal cntainers unless they are nt resealable Original labels and material safety data will be retained; they cntain imprtant prduct infrmatin If surplus prduct must be dispsed f, manufacturers' r lcal and State recmmended methds fr prper dispsal will be fllwed. B-9

61 SPILL PREVENTION (Cntinued) Prduct Specific Practices The fllwing prduct specific practices will be fllwed nsite: Petrleum Prducts: All nsite vehicles will be mnitred fr leaks and receive regular preventive maintenance t reduce the chance f leakage. Petrleum prducts will be stred in tightly sealed cntainers which are clearly labeled. Any asphalt substances used nsite will be applied accrding t the manufacturer's recmmendatins. Fertilizers: Fertilizers used will be applied nly in the minimum amunts recmmended by the manufacturer. Once applied, fertilizer will be wrked int the su t limit expsure t strm water. Strage will be in a cvered shed. The cntents f any partially used bags f fertilizer will be transferred t a sealable plastic bin t avid spills. Paints: All cntainers will be tightly sealed and stred when nt required fr use. Excess paint will nt be discharged t the strm sewer system but will be prperly dispsed f accrding t manufacturers' instructins r State and lcal regulatins. Cncrete Trucks: Cncrete trucks will nt be allwed t wash ut r discharge surplus cncrete r drum wash water n the site. Spill Cntrl Practices In additin t the gd husekeeping and material management practices discussed in the previus sectins f this plan, the fllwing practices will be fllwed fr spill preventin and cleanup: Manufacturers' recmmended methds fr spill cleanup will be clearly psted and site persnnel will be made aware f the prcedures and the lcatin f the infrmatin and cleanup supplies. Materials and equipment necessary fr spill cleanup will be kept in the material strage area nsite. Equipment and materials will include but nt be limited t brms, dust pans, mps, rags, glves, gggles, kitty liner, sand, sawdust, and plastic and metal trash cntainers specifically fr this purpse. All spills will be cleaned up immediately after discvery. The spill area will be kept well ventilated and persnnel will wear apprpriate prtective clthing t prevent injury frm cntact with a hazardus substance. Spills f txic r hazardus material will be reprted t the apprpriate State r lcal gvernment agency, regardless f the size. The spill preventin plan will be adjusted t include measures t prevent this type f spill frm reccurring and hw t clean up the spill if there is anther ne. A descriptin f the spill, what caused it, and the cleanup measures will als be included. Mr. De, the site superintendent respnsible fr the day-t-day site peratins, will be the spill preventin and cleanup crdinatr. He will designate at least three ther site persnnel wh will receive spill preventin and cleanup training. These individuals will each becme respnsible fr a particular phase f preventin and cleanup. The names f respnsible spill persnnel will be psted in the material strage area and in the ffice trailer nsite. B-10

62 POLLUTION PREVENTION PLAN CERTIFICATION I certify under penalty f law that this dcument and ail attachments were prepared under my directin r supervisin in accrdance with a system designed t assure that qualified persnnel prperly gathered and evaluated the infrmatin submitted. Based n my inquiry f the persn r persns wh manage the system, r thse persns directly respnsible fr gathering the infrmatin, the infrmatin submitted is, t the best f my knwledge and belief, true, accurate, and cmplete. I am aware that there are significant penalties fr submitting false infrmatin, including the pssibility f fine and imprisnment fr knwing vilatins. Signed: Jhn R. Quality, President Quality Assciates Date: NTRACTOR'S CERTIFICATION I certify under penalty f law that I understand the terms and cnditins f the general Natinal Pllutant Discharge Eliminatin System (NPDES) permit that authrizes the strm water discharges assciated with industrial activity frm the cnstructin site identified as pan f this certificatin. Signature Fr Respnsible fr Jseph Cntractr, President Date: Center City Cnst., Inc. 21 Elm Street Center City, Any State (123) General Cntractr Jhn Planter Vice President f Cnstructin Date: Green Grass, Inc Center Rad Outerville, Any State (123) Temprary and Permanent Stabilizatin Jim Kay, President Date: Dirt Mvers, Inc. 523 Lincln Ave. Outerville, Any State (123) Stabilized Cnstructin Entrance, Earth Dikes, Sediment Basin B-ll

63 Hmerviile Apartments Bradview Avanue Center City, Anystate Site Area = 11.0 Acn^ Scale: 1* = 10(J^P Sil Type: Sandy Lam - Limit f Clearing and Grading Prperty Line r>v^m Area t be Seeded - Earth Dike Strm Water inlet Strm Water Manhle - SW -^ strm Water Drain sjä^sasa^ Existing Tree Line tf*>w»k Rip Rap/Stne 270 ROCKY CREEK -. (Apprx. 450") B-12