FINAL SITE MITIGATION PLAN BAYVIEW GATEWAY PARK PROJECT SAN FRANCISCO, CALIFORNIA

Transcription

1 FINAL SITE MITIGATION PLAN BAYVIEW GATEWAY PARK PROJECT SAN FRANCISCO, CALIFORNIA PREPARED FOR PORT OF SAN FRANCISCO OCTOBER 2013 SUBMITTED BY AEW ENGINEERING, INC. 55 NEW MONTGOMERY STREET, SUITE 722 SAN FRANCISCO CALIFORNIA Versin 2

2 FINAL SITE MITIGATION PLAN BAYVIEW GATEWAY PARK PROJECT SAN FRANCISCO, CALIFORNIA OCTOBER 2013 PREPARED FOR: PORT OF SAN FRANCISCO SUBMITTED BY: AEW ENGINEERING, INC. 55 NEW MONTGOMERY STREET, SUITE 722 SAN FRANCISCO, CA Versin 2

3 Table f Cntents TABLE OF CONTENTS 1 INTRODUCTION Site and Prject Backgrund Summary f Previus Site Investigatins Article 22A Envirnmental Site Characterizatin Illinis Street Bridge Site Multiple Site Investigatins Frmer Exxn Mbile Bulk Facility Envirnmental Characterizatin at Prject Site Plan Organizatin PLANNED SITE DEVELOPMENT SITE MANAGEMENT MEASURES PRIOR TO CONSTRUCTION Preventin f Unauthrized Access t Prject Site Subsurface Maintenance Wrk Site Mnitring Existing Sil Stckpiles SITE MITIGATION AND MANAGEMENT MEASURES DURING PROJECT CONSTRUCTION Sil Mitigatin Measures and Sil Cnfirmatin Sampling Sil Mitigatin Measures Sil Cnfirmatin Sampling Dust Cntrl and Mnitring Cntrls f Off Site Runff Sil Management Prtcls Access Cntrl Cmmunity Htline Cnstructin Wrker Health and Safety Versin 2 Q:\2012 Prjects\ TT AEW_JV TA 12 Prt f SF Bayview Article 22A\SMP\V2\Bayview Final SMP_V2.dcx i

4 Table f Cntents 4.8 Cntingency Prtcl SITE MANAGEMENT MEASURES AFTER PROJECT CONSTRUCTION Site Inspectin Prtcls Fr Future Subsurface Develpment Use f Grundwater Agency Ntificatin n Change in Prperty Use REFERENCES LIST OF FIGURES FIGURE 1 FIGURE 2 SITE LOCATION MAP SITE LAYOUT MAP LIST OF APPENDICES APPENDIX A SFDPH ENVIRONMENTAL CHARACTERIZATION REPORT APPROVAL LETTER AND SFDPH SITE MITIGATION PLAN AND DUST CONTROL PLAN REVIEW LETTER APPENDIX B DUST MITIGATION PLAN B.1 Ptential Dust Generating Activities... B 1 B.2 Dust Cntrl and Mitigatin Prtcls... B 1 B.3 Dust Mnitring Prtcl... B 3 B.3.1 Prpsed Dust Actin Levels... B 3 B.3.2 Prpsed Dust Mnitring Prtcls... B 3 B.4 Recrdkeeping and Management... B 5 APPENDIX C SOIL MANAGEMENT PLAN C.1 Sil Stckpile Management... C 1 C 2 Sil Sampling... C 1 C 2.1 Sil Sampling... C 1 C 2.2 Chemical Analyses... C 3 C 2.3 Sil Dispsal Classificatin Evaluatin... C 5 Versin 2 Q:\2012 Prjects\ TT AEW_JV TA 12 Prt f SF Bayview Article 22A\SMP\V2\Bayview Final SMP_V2.dcx ii

5 Table f Cntents C 3 Sil Lad ut, Transprtatin, and Dispsal... C 5 iii Versin 2 Q:\2012 Prjects\ TT AEW_JV TA 12 Prt f SF Bayview Article 22A\SMP\V2\Bayview Final SMP_V2.dcx

6 Sectin 1 Intrductin 1 INTRODUCTION This Site Mitigatin Plan (SMP) presents the decisin framewrk and specific prtcls fr managing the chemicals in the sil in a manner t mitigate risks t human health and the envirnment at the Prt f San Francisc s (the Prt s) Bayview Gateway Park Prject site (The Prject Site). The apprximate lcatin f the Prject Site is shwn n Figure 1. The Prject Site is subject t cmpliance with the San Francisc Public Health Cde Article 22A (Article 22A) rdinance due t the lcatin f the Site and accrding t the Prt, the Prject wuld invlve disturbing mre than 50 cubic yards f sil. The SMP delineates specific site management measures that will be implemented prir t, during, and after develpment f the Prject Site. This SMP is prepared based n the infrmatin described in the fllwing dcuments: Final Envirnmental Characterizatin Reprt, Article 22A Cmpliance, Bayview Gateway Park Prject, San Francisc, Califrnia prepared by AEW Engineering, Inc. (AEW) and dated February 2013 (Envirnmental Investigatin Reprt), and apprved by the San Francisc Department f Public Health (SFDPH) thrugh the SFDPH s letter dated April 11, 2013 (SFDPH s Apprval Letter). A cpy f the SFDPH s Apprval Letter is included in Appendix A f this SMP; and 90% Design Drawings in dcument titled Bayview Gateway & Tulare Park Imprvement Prject, Cntract N dated July 2013 (the Prt s 90% Design). This versin f the SMP is develped in respnses t the letter frm the San Francisc Department f Public Health (SFDPH s SMP Review Letter) dated September 20, 2015 n the Site Mitigatin Plan, Bayview Gateway Park Prject, San Francisc, Califrnia prepared by AEW Engineering, Inc. (AEW) and dated July A cpy f the SFDPH s SMP Review Letter is included in Appendix A f this SMP. This SMP was prepared slely fr use within the Prject Site and is nt intended fr applicatin tward site mitigatin utside the Prject Site. Althugh this SMP sets frth the requirements t apprpriately manage the chemicals in sil, the SMP is nt intended t catalgue all ther legal requirements that may apply t the prject r t activities cnducted within the Prject Site. Any cnstructin r site activities by Prt s parties r authrized entities shall be cnducted in cmpliance with all applicable federal, Califrnia, and lcal regulatins. Current and future wners, ccupants and managers, r cntractrs delegated r authrized t perfrm prperty maintenance r cnstructin within the Prject Site, are required t cmply with the measures identified in the SMP when engaging in the relevant activities discussed and all applicable federal, Califrnia, and lcal regulatins at the time when thse activities are cnducted. 1.1 SITE AND PROJECT BACKGROUND The Prt plans t develp apprximately ne acre f public pen space alng the suthern bank f Islais Creek in San Francisc s suth east waterfrnt. The prpsed prject site is lcated within the western prtin f Pier 90 and is bunded by Islais Creek n the nrth, Carg Way n the Suth, 3 rd Street n the West, and Illinis Street n the East (the Site), as shwn n Figure 2. The anticipated prject cnstructin activities will primarily include the fllwing key elements: 1 1 Versin 2 Q:\2012 Prjects\ TT AEW_JV TA 12 Prt f SF Bayview Article 22A\SMP\V2\Bayview Final SMP_V2.dcx

7 Sectin 1 Intrductin Demlitin f the existing timber wharf; Rehabilitatin f the seawall; Remval f the current asphalt lt and transfrming int green space with walkways; and Cnstructin/installatin f plaza spaces and green spaces fr use by the general public. Cnstructin f this prject is currently planned t be cmpleted in SUMMARY OF PREVIOUS SITE INVESTIGATIONS Site characterizatins were cnducted at the Prject Sites and tw sites immediately adjacent t the Prject Site. These adjacent tw sites, as shwn in Figure 2, were (1) Illinis Street Bridge Site lcated east f the Site, and (2) the Exxn Mbile Bulk Facility Site lcated east f the Illinis Street Bridge Site. An envirnmental site characterizatin was cnducted at the Prject Site in January, 2013 (2013 Envirnmental Characterizatin). A detailed summary f these investigatins and results f the 2013 Envirnmental Characterizatin were included in the Final Envirnmental Characterizatin Reprt (AEW, 2013). A brief summary f the results f these site characterizatins are presented belw Article 22A Envirnmental Site Characterizatin Illinis Street Bridge Site In August, 2001, as part f the Article 22A cmpliance fr the cnstructin f the Illinis Street Bridge Site, an envirnmental investigatin cnsisted f six explratry brings thrughut the Illinis Street Bridge site cnducted by Treadwell & Rll (T&R) t assess the presence f petrleum hydrcarbn and heavy metal cntaminatin in sil and grundwater (T&R, 2011b). Accrding t the envirnmental investigatin reprt (T&R, 2011b), the general gelgy f the area is underlain by abut 8 t 22 feet f fill, cnsisting primarily f lse t medium dense sandy gravel with fine angular gravel and cncrete and brick fragments. The fill is underlain by sft t medium stiff clay with rganics, knwn lcally as Bay Mud. Grundwater was encuntered at apprximately 5.5 t 6 feet bgs alng the Illinis Street Bridge site. Results f the chemical analyses perfrmed n sil samples frm the brings in clsest prximity t the Site indicated elevated levels f TPH, lead and sluble lead in Califrnia Waste Extractin tests at depths f 1, 2 and 3 feet bgs. N detectin f vlatile rganic chemicals, semi vlatile rganic chemicals, sulfides, cyanides, plychlrinated biphenyls, asbests abve the respective detectin limit was fund in sil samples frm these brings Multiple Site Investigatins Frmer Exxn Mbile Bulk Facility Multiple site investigatins were perfrmed since 2007 at the frmer Exxn Mbile Bulk Facility lcated in the eastern prtin f Pier 90, as shwn n Figure 2. The site investigatins were initiated due t bservatins f petrleum hydrcarbns in sil and grundwater during the remval f a fuel line by Pacific Gas and Electric which ran frm Islais Creek suth acrss Amadr Street nt the westernmst prtin f the Exxn Mbil site. Sil and grundwater investigatins were perfrmed by Exxn Mbile in 2009 and 2010 (Actn Mickelsn Envirnmental, Inc. 2011). Results f the sil, grundwater and sil gas investigatins indicated elevated levels f TPHs and nickel in sil abve respective Califrnia Reginal Water Quality Cntrl Bard (RWQCB) Envirnmental Screening Levels (ESLs), TPHs and benzene abve ESLs in grundwater, and a methane cncentratin in sil vapr at 3,700 ppm. 1 2 Versin 2 Q:\2012 Prjects\ TT AEW_JV TA 12 Prt f SF Bayview Article 22A\SMP\V2\Bayview Final SMP_V2.dcx

8 Sectin 1 Intrductin Currently, Exxn Mbile is cnducting additinal site characterizatin at this site that includes installatin f six grundwater mnitring wells t mnitr the levels f petrleum hydrcarbns in grund water Envirnmental Characterizatin at Prject Site A sil, grundwater, and sil gas investigatin was cnducted by AEW in January 2013 t evaluate envirnmental cnditins in subsurface sil and grundwater t be disturbed within the Prject Site, t determine required site mitigatin activities (if any), and t evaluate waste classificatin fr t be excavated sil requiring dispsal. Details f the sil investigatin are presented in the Envirnmental Investigatin Reprt (AEW, 2013). The Envirnmental Investigatin Reprt was apprved by SFDPH n April 11, A cpy f this apprval letter is presented in Appendix A f this SMP. A brief summary f the 2013 investigatin is prvided belw. Sil: Results f the 2013 envirnmental investigatin indicated levels f Ttal Petrleum Hydrcarbns (TPH) as gasline, TPH as diesel, naphthalene, cyanide, arsenic and nickel in sil exceeding ESLs under the respective cmmercial scenari, cnstructin wrker scenari r exceeding bth ESLs in subsurface sils. The Envirnmental Investigatin Reprt cncluded that additinal sil characterizatin r mitigatin is nt anticipated t be required fr these chemicals exceeding the respective ESLs based n ne f the fllwing ratinale: The sil will be excavated; OR The area where subsurface sil exceeds the ESLs will be paved with asphalt and/r cncrete at the cmpletin f this Prject; OR The area will be cvered with 2 feet f clean imprt fill; OR The area with subsurface sil exceeding ESLs remains undisturbed with the results f the 2013 Envirnmental Characterizatin indicating that the area is cvered with apprximately 1.5 feet f native sil with the reprted cncentratins in sil samples belw the ESLs, thereby preventing direct expsure f sil t humans and the envirnment. The area where subsurface sils exceed ESLs will remain undisturbed and cvered with up t 2 feet f clean native sil, thereby preventing direct expsure t human health and the envirnment. Grundwater: Nickel was detected exceeding the respective ESL fr grundwater. Since there is n current r planned grundwater use as ptable water at the site and lw ptential migratin f metal t the bay via grundwater due t lw mbility f metals thrugh saturated sil, it is cncluded that nickel in grundwater is nt expected t pse a significant adverse impact t human health and the envirnment; and Methane Gas: Methane was detected in the sil gas samples frm brings A 2 3, A 4 3 and A 5 3 at cncentratins ranging frm 4.8 t 3,400 micr liters per liter (equivalent t % t 0.34%). The reprted cncentratins were significantly belw the 1.25% level as listed in the RWQCB Methane Letter (RWQCB, 2001) indicating that n further actin with respect t methane mnitring and/r mitigatin fr ptential vapr intrusin t the planned develpment will be required. 1 3 Versin 2 Q:\2012 Prjects\ TT AEW_JV TA 12 Prt f SF Bayview Article 22A\SMP\V2\Bayview Final SMP_V2.dcx

9 Sectin 1 Intrductin Based n the results f the 2013 envirnmental investigatin (AEW, 2013), n site mitigatin wuld be required n chemicals with detected cncentratins in sil and grundwater exceeding the ESLs. In additin, the 2013 Envirnmental Investigatin Reprt als recmmended the fllwing: T ensure the ratinale fr the n site mitigatin as described in the Envirnmental Investigatin Reprt remained valid and prper sil management and handling prtcls wuld be implemented during cnstructin activities, a sil management plan wuld be develped and implemented by the cntractr t address the handling, management and reuse f sil n this prject at the Site. The sil management plan shall als address n site prcedures t be implemented n sil that is cnsidered as hazardus; A waste management and dispsal plan fr sil shall be develped and implemented by the cnstructin cntractr t ensure cmpliance f prper waste classificatin by applicable regulatins and waste acceptance requirement by the landfill; The site develpment will cmply with the San Francisc Department f Public Health Article 22B Ordinance (Article 22B) fr dust mitigatin during site cnstructin. A dust mitigatin plan including dust management and mnitring prtcls shall be develped in cmpliance with the Article 22B requirements; and T ensure the safety f persnnel during cnstructin, a health and safety prgram shall be develped and implemented t prtect wrker frm expsures f chemicals abve the applicable federal and state Occupatinal Safety and Health Administratin s (OSHA) Permissible Expsure Limits (PELs). Such prtcls shuld include persnal prtective equipment requirements, wrker decntaminatin prcedures, and air mnitring strategies t ensure that the wrkers are adequately prtected. The Envirnmental Investigatin Reprt was transmitted t SFDPH fr review and apprval in cmpliance with the Article 22A requirement and was apprved by SFDPH thrugh a letter dated April 11, As stated in the SFDPH s Apprval Letter, SFDPH requested a site mitigatin plan (SMP) fr the planned develpment at the Prject Site t be prepared pre Article 22A requirement n this Prject. This SMP is prepared in respnse t this request frm SFDPH. 1.3 PLAN ORGANIZATION The remainder f this SMP is rganized int the fllwing sectins: Sectin 2.0 Planned Site Develpment; describing the planned excavatin and cnstructin activities at the Prject Site; Sectin 3.0 Site Management Measures Prir t Develpment, describing mitigatin measures t be implemented prir t prject cnstructin activities; Sectin 4.0 Site Management Measures During Develpment, describing mitigatin measures t be perfrmed during prject cnstructin; Sectin 5.0 Site Management Measures After Develpment, utlining lng term site maintenance measures planned after prject cnstructin; and Sectin 6.0 References; detailed the dcuments referenced in this Site Mitigatin Plan. 1 4 Versin 2 Q:\2012 Prjects\ TT AEW_JV TA 12 Prt f SF Bayview Article 22A\SMP\V2\Bayview Final SMP_V2.dcx

10 Sectin 1 Intrductin In additin, a dust mitigatin plan and a sil management plan are prepared and included as Appendices B and C f this SMP. 1 5 Versin 2 Q:\2012 Prjects\ TT AEW_JV TA 12 Prt f SF Bayview Article 22A\SMP\V2\Bayview Final SMP_V2.dcx

11 Sectin 2 Planned Site Develpment 2 PLANNED SITE DEVELOPMENT In accrdance with the Prt s 90% Design f this Prject, as shwn n Figure 2, the prpsed develpment wuld primarily cnsist f varius landscape areas, permeable granite pavers, a pedestrian walkway, and a plaza t the nrth near Islais Creek. Accrding t the Prt, sil disturbance will primarily include sil grading, cnstructin f the plaza, and utility trenching. The Prt anticipates that mst f the sil disturbance will ccur during grading peratin at Area A 4 (as shwn n the Figure 2) fr pen landscape, and during the cnstructin f the plaza. As shwn n Figure 2 fr the purpses f the Article 22A cmpliance f this Prject, the planned prject develpment based n the Prt s 90% Design is divided int five general wrk areas and the planned excavatin and cnstructin activities at each f these areas are as fllws: Area A 1: Excavatin t a maximum f apprximately 5 feet bgs. Upn cmpletin f the plaza, the area will be paved with asphalt and/r cncrete; Areas A 2, A 3, and A 5 Area t be excavated t a maximum f 2 feet bgs, and backfilled with clean native r clean imprt sil, thereby eliminating direct expsure t human health r the envirnment; and Area A 4: Planned cnstructin f the landscape area A 4 will require excavatin and grading t apprximately 5 feet bgs. Results f the sil samples cllected frm this area in 2013 Envirnmental Characterizatin indicated cncentratins f nickel at 5 feet bgs exceeding ESLs under the cmmercial scenari. T eliminate the ptential fr expsure f nickel abve ESLs t human health and the envirnment, the Prt plans t excavate an additinal 2 feet belw final grade (apprximately 5 feet bgs f the existing elevatin) and backfill with clean imprt fill. In summary, this area will be excavated t apprximately 7 feet bgs frm existing elevatin and backfilled with 2 feet f clean imprt fill. 2 1 Versin2 Q:\2012 Prjects\ TT AEW_JV TA 12 Prt f SF Bayview Article 22A\SMP\V2\Bayview Final SMP_V2.dcx

12 Sectin 3 Site Management Measures Prir t Cnstructin 3 SITE MANAGEMENT MEASURES PRIOR TO CONSTRUCTION This sectin presents the site management measures that will be implemented prir t prject cnstructin. The prpsed site management measures prir t cnstructin include the fllwing: Preventin f Unauthrized Access t Prject Site; Subsurface Maintenance Wrk; Site Mnitring; and Existing Sil Stckpiles. Details f these mitigatin measures are described belw. 3.1 PREVENTION OF UNAUTHORIZED ACCESS TO PROJECT SITE Currently, the prject site is partially fenced alng the Illinis Street site bundary t restrict unauthrized access t the dilapidated wharf area. The prject site is mstly cncrete r asphalt (with the exceptin f Area A 4) and used fr parking assciated with the adjacent fire statin. N significant human expsure is anticipated at the Prject Site t warrant site access restrictin based n current site uses. N site access restrictin measures such as any additinal fencing is prpsed as the precnstructin mitigatin measures fr this prject. 3.2 SUBSURFACE MAINTENANCE WORK It is nt anticipated that subsurface maintenance wrk will be cnducted at the Prject Site prir t cnstructin. Hwever, in the event that subsurface maintenance wrk is cnducted at the site, all subsurface maintenance wrk where wrkers will cme int direct cntact with the native sil, will be cnducted in cmpliance with the health and safety prtcls as described in Sectin SITE MONITORING The site will be mnitred n a peridic basis (such as n quarterly basis) by the Prt t cnfirm that the site management measures described in this sectin are effective. The inspectins will be cnducted t verify that access restrictin measures are in place, and will identify areas where fencing might need t be repaired r reinstalled. In the event that when inspectins identify fencing areas requiring repair r re installatin, such repair r re installatin will be cmpleted by the Prt r its cntractr as sn as reasnably practicable. 3.4 EXISTING SOIL STOCKPILES N sil stckpile is currently bserved within the Prject Site. In the event that in the future, sil stckpiling is required at the Prject Site, management f sil stckpile, if any, prir t prject cnstructin will be cnducted in accrdance with the sil stckpile management prtcls as described belw in Sectin Versin2 Q:\2012 Prjects\ TT AEW_JV TA 12 Prt f SF Bayview Article 22A\SMP\V2\Bayview Final SMP_V2.dcx

13 Sectin 4 Site Mitigatin and Management Measures During Prject Cnstructin 4 SITE MITIGATION AND MANAGEMENT MEASURES DURING PROJECT CONSTRUCTION This sectin presents the management measures that will be implemented by the Prt and its cnstructin cntractr (Cnstructin Cntractr) during prject cnstructin within the Prject Site. As described in Sectin 1, majr prject cnstructin activities will invlve surface excavatin, grading, demlitin f the existing timber wharf, and cnstructin/installatin f plaza space. Currently, the earthwrk activities fr cnstructin will be limited t a depth f apprximately 5 t 7 feet bgs. Based n the abve described earthwrk cnstructin activities, majr ptential events r activities that culd result in ptential impacts t human health and the n site cnstructin wrkers include: Dust generatin assciated with sil activities including sil excavatin, grading, wharf demlitin, sil handling, transprtatin, and dispsal, mvement f cnstructin and transprtatin equipment, fugitive dust generatin frm winds traversing expsed areas and sil stckpiles if present, and any cnstructin activity that culd ptentially generate dust; and Direct cntact with site sil by wrkers. Based n the current plan frm the Prt, n grundwater dewatering activity is anticipated fr the prject cnstructin. Therefre, n mitigatin measures are identified fr this activity. Hwever, in the event that grundwater dewatering activity is determined t be necessary during cnstructin, this SMP will be revised t include the apprpriate mitigatin measures fr the dewatering activity. Based n the planned cnstructin activities described abve, the prpsed site management measures during cnstructin include the fllwing: Sil Mitigatin Measures and Sil Cnfirmatin Sampling; Dust Cntrl and Mnitring; Cntrl f Off Site Runff; Sil Management Prtcls; Access Cntrl; Cnstructin Wrker Health and Safety; and Cntingency Prtcls The site management measures that will cntrl ptential impacts assciated with each f the events r activities listed abve are described belw. 4.1 SOIL MITIGATION MEASURES AND SOIL CONFIRMATION SAMPLING Sil Mitigatin Measures As discussed in Sectins 1 and 2 and in accrdance with the 90% Design, with the exceptin f Areas A 1 and A 4, n majr site grading and cnstructin invlving disturbance f subsurface sil with reprted 4 1 Versin2 Q:\2012 Prjects\ TT AEW_JV TA 12 Prt f SF Bayview Article 22A\SMP\V2\Bayview Final SMP_V2.dcx

14 Sectin 4 Site Mitigatin and Management Measures During Prject Cnstructin cncentratins exceeding ESLs wuld be perfrmed, and the areas will be cvered either with asphalt/cncrete r with 1.5 feet f native sil with reprted cncentratins belw ESLs that will prvide a barrier fr preventing direct expsure t humans and the envirnment. Minr sil disturbance is anticipated within Areas A 2, A 3 and A 5.. Site mitigatin invlving sil remval fr the park cnstructin will be cnducted fr Areas A 1, A 2, A 3, A 4, and A 5. A summary f the sil disturbance activities at these tw areas are presented belw. Area A 1: Accrding t the 90% Design, sil excavatin will be cnducted t up t apprximately 5 feet bgs fr the cnstructin f the plaza. Upn cmpletin f sil excavatin within these areas, a visual barrier (such as ge textile fabric, ge grid r range cnstructin fence) shall be placed within the excavatin area t prvide a visual indicatin f native sil remained at the area and fllwed by placing 2 feet (r as much imprt fill as necessary) f clean fill sil abve the visual barrier. Upn cmpletin f the plaza cnstructin, the area will be paved with cncrete that will serve as a physical barrier fr preventing direct expsure t human and surface envirnment; Areas A 2, A 3, and A 5. Accrding t the 90% Design, these areas are t be excavated t a maximum f 2 feet bgs, and backfilled with clean native r clean imprt sil. Upn cmpletin f sil excavatin within these areas, a visual barrier (such as ge textile fabric, ge grid r range cnstructin fence) shall be placed within the excavatin area t prvide a visual indicatin f native sil remained at the area and fllwed by placing 2 feet (r as much imprt fill as necessary) f clean fill sil abve the visual barrier; and Area A 4: Accrding t the 90% Design and the Prt, sil will be excavated up t 7 feet bgs fr the landscape area cnstructin. Upn cmpletin f sil excavatin within these areas, a visual barrier (such as ge textile fabric, ge grid r range cnstructin fence) shall be placed within the excavatin area t prvide a visual indicatin f native sil remained at the area and fllwed by placing 2 feet (r as much imprt fill as necessary) f clean fill 1 sil abve the visual barrier Sil Cnfirmatin Sampling As described in Sectin 4.1.1, site mitigatin are anticipated t be necessary fr Areas A 1, A 2, A 3, A 4, and A 5. Upn cmpletin f excavatin t the final depth(s) within each Area, ne sil cnfirmatin sample shall be cllected frm the bttm f the excavatin and submitted t a Califrnia Certified labratry fr the fllwing chemical analyses: Califrnia Cde f Regulatins Title 22 metals (Title 22 metals) by USEPA Methd 6010/7471 series; and Cyanide, ttal by USEPA Methd SM4500 CN. 1. Prir t imprt the backfill sil, the imprt fill will be dcumented that it is free f cntaminatin (i.e. n reprted cncentratins in the fill will exceed the ESLs with the exceptin f arsenic. Arsenic cncentratin in the fill shall be either belw the respective ESL r at similar cncentratin range fund at the Site during 2013 Envirnmental Characterizatin. 4 2 Versin2 Q:\2012 Prjects\ TT AEW_JV TA 12 Prt f SF Bayview Article 22A\SMP\V2\Bayview Final SMP_V2.dcx

15 Sectin 4 Site Mitigatin and Management Measures During Prject Cnstructin 4.2 DUST CONTROL AND MONITORING A dust mitigatin plan presenting the prtcls fr dust cntrl and mnitring t be implemented during prject activities wuld be develped and implemented t meet the requirements f Sectin f the San Francisc Building Cde, Article 22B f the San Francisc Health Cde. A dust mitigatin plan has been develped and is included in Appendix B. As indicated in the dust mitigatin pan, dust cntrls will be implemented by the Prt s cnstructin cntractr (the Cnstructin Cntractr) t prevent ff site dispersal and accumulatin f cntaminated site sil and t cmply with applicable regulatins pertaining t air quality and nuisance cntrl. Ptential cnstructin activities that culd generate dust and require risk management measures include, but are nt limited t, (1) excavatin and sil management, (2) n site cnstructin vehicle traffic, and (3) windblwn sil. The Cnstructin Cntractr and the Prt shall mnitr the dust generatin during the site cnstructin at the Prject Site in accrdance with the dust mitigatin plan in Appendix B. Results f the mnitring will be used by the Cnstructin Cntractr fr determining the apprpriate dust cntrl practices. Dust generatin will be minimized by all apprpriate measures, which may include but nt be limited t the fllwing: Wetting f surface sils and sil piles during sil excavatin, management, and backfilling; Cntrl f excavatin techniques t minimize dust generatin, such as minimizing drp distances; Cvering f stckpiles, if present, with visqueen r ther suitable membrane cvers. The cvers shall be weighted dwn with sand bags, tires, r ther weights t prevent cvers frm being blwn ff by wind; and Additinal measures, if required, may be utilized at the discretin f the Cnstructin Cntractr. Details f these measures are described in the dust mitigatin plan (Appendix B). 4.3 CONTROLS OF OFF SITE RUNOFF The Cnstructin Cntractr will prepare and implement a Site Specific Strm Water Pllutin Preventin Plan (SWPPP) fr prviding adequate strm water runff cntrls t prevent ff site migratin f site sil, sediment, and any hazardus materials. The SWPPP shall include best management practices (BMPs) such as thse described in the Califrnia Strm Water Best Management Practices Handbks Cnstructin Activity. In additin, n site sil and ersin prtectin cntrls will be included in the SWPPP fr minimizing the discharges f sil frm the Prject Site. Ptential sil and ersin prtectins will include, but nt be limited t, the fllwing: Cvering sil stckpiles, if present, with visqueen r ther suitable membrane cvers; and Placing silt fences, straw bales, r ther applicable means alng the lwer elevatin bundary f the Site t cntain sil laden runff. 4 3 Versin2 Q:\2012 Prjects\ TT AEW_JV TA 12 Prt f SF Bayview Article 22A\SMP\V2\Bayview Final SMP_V2.dcx

16 Sectin 4 Site Mitigatin and Management Measures During Prject Cnstructin Details f the site specific BMPs fr strm water management and ff site runff cntrls will be described in the SWPPP t be prepared by the Cnstructin Cntractr in accrdance with applicable federal, state, and lcal regulatins and requirements. 4.4 SOIL MANAGEMENT PROTOCOLS As described in the Envirnmental Investigatin Reprt, the Prt anticipates the vlume f sil disturbance wuld be relatively small but mst likely exceed the 50 cubic yard threshld requirement fr cmpliance with Article 22A. Results f the January 2013 envirnmental investigatin indicated that a prtin f the sil is cnsidered as Califrnia nn Resurce Cnservatin and Recvery Act (nn RCRA) hazardus waste due t the presence f elevated lead levels in subsurface sil at apprximately 5 feet bgs within Area A 4. In additin, sil sampling results indicated nickel cncentratins exceeding ESLs at 5 feet bgs within prject area. In the event that the Prt r the Cnstructin Cntractr plans t reuse the sil within the tp 1.5 feet r sil represented by reprted cncentratins at the site that were belw ESLs, such excavated sil with cncentratin belw ESLs shall be stckpiled and maintained separately frm ther excavated sil t prevent any crss cntaminatin fr reuse prpse. A sil management plan is prepared and included in Appendix C presenting the prtcls t be implemented during prject activities t manage such excavated sil t be generated during site activities. The sil management plan includes prtcls fr the fllwing: Sil stckpiling, if necessary; Sil sampling and chemical analyses, if necessary; Sil transprtatin and dispsal; and Equipment Decntaminatin. 4.5 ACCESS CONTROL During cnstructin, temprary cnstructin fence and gate will be erected at the site bundary and arund the fllwing wrk areas: Cnstructin areas where active cnstructin activities are ccurring; Any sil stckpile areas; and Equipment and materials strage areas. The fence and gate will remain lcked during nn cnstructin hurs. The Cnstructin Cntractr will be required t maintain the fencing and gate at all times t prvide sufficient site access cntrl t the respective areas. 4.6 COMMUNITY HOTLINE During cnstructin, the Prt will establish a cmmunity htline in regards t the site mitigatin fr the Prject Site. This htline will allw the cmmunity members t call fr infrmatin r t express cncerns related t site activities. The cmmunity htline phne number will be written and psted n the fence r gate t the Prject Site fr the duratin f the prject. 4 4 Versin2 Q:\2012 Prjects\ TT AEW_JV TA 12 Prt f SF Bayview Article 22A\SMP\V2\Bayview Final SMP_V2.dcx

17 Sectin 4 Site Mitigatin and Management Measures During Prject Cnstructin 4.7 CONSTRUCTION WORKER HEALTH AND SAFETY The Cnstructin Cntractr will assume full respnsibility and liability fr the cmpliance with prvisins f the Wrk Hurs and Safety Standard Act (40 U.S.C. 327 et seq.). The Cnstructin Cntractr will cmply with all applicable safety regulatins and ther requirements including but nt limited t the fllwing: Cde f Federal Regulatins (CFR), Title 29 Labr; State f Califrnia, Califrnia Cde f Regulatins (CCR), Industrial Relatins; Medical Surveillance Prgrams (e.g., OSHA, 29 CFR 1200); Injury and Illness Preventin Prgrams (e.g., SB 198, 8 CCR, CAL/OSHA, GISO 3203, Sectin 5192 and 1509); The Cnstructin Standard (e.g. 29 CFR 1926); Wrkers Right t Knw (e.g. 29 CFR ); and Sectin f the Califrnia Labr Cde (Hazard Cmmunicatin). During cnstructin activities, wrkers that may directly cntact chemically impacted sil as identified in the January 2013 Envirnmental Investigatin at the Prject Site and ther cnstructin hazards will perfrm their activities in accrdance with an Envirnmental Health and Safety Plan (EHASP). The Cnstructin Cntractr will be respnsible fr develping and implementing its wn EHASP in cmpliance with all applicable federal, state, and lcal regulatins and requirements. The EHASP will be prepared and apprved by a Certified Industrial Hygienist. Prir t cnducting any field activities that require implementatin f the EHASP, the Cnstructin Cntractr will submit the EHASP t the Prt at least tw weeks prir t cmmencing any site activity. In additin, the Cntractr shall submit the EHASP t SFDPH at least tw weeks prir t cmmencing any site activity. Preparatin f an EHASP will be required fr all activities, but nt limited t, site preparatin, sil excavatin, sil management, sil lading fr transprtatin t an ff site permitted facility fr dispsal, backfilling, and ther activities where wrkers might have direct cntact with the site sil and ther cnstructin hazards frm the Prject Site. The EHASP shall include, but nt be limited t, the fllwing majr elements: Identificatin and descriptin f the respnsibility f thse individuals wh cntrl each phase f peratins and are respnsible fr the Cnstructin Cntractr s persnnel safety and its subcntractrs. The plan shall set frth in writing the plicies and prcedures t be fllwed by all cnstructin persnnel. This shall include designatin f an verall Prject Site safety representative with authrity t stp any cnstructin activity r mdify wrk practices if the site safety plan is being vilated, r if such actin is necessary t prtect wrkers, prperty and the surrunding cmmunity during the cntract perid. This requirement shall apply cntinuusly during the cnstructin duratin; Infrmatin identifying and delineating all wrkplace hazards that have been identified r are generally assciated with the prpsed wrk phases, and hw this infrmatin is cmmunicated t the Cnstructin Cntractr s persnnel and its subcntractrs (e.g., tailgate safety meetings) as required in applicable federal, state, and lcal regulatins; 4 5 Versin2 Q:\2012 Prjects\ TT AEW_JV TA 12 Prt f SF Bayview Article 22A\SMP\V2\Bayview Final SMP_V2.dcx

18 Sectin 4 Site Mitigatin and Management Measures During Prject Cnstructin Engineering cntrls, specific wrk practices, and measures t be used t mnitr and prtect wrker expsure t any identified physical, chemical, and ther hazards as identified fr the cnstructin. If site cnditins encuntered during the site cnstructin indicate the ptential presence f ther physical, chemical, and ther hazards that are nt cvered in the EHASP, the Cnstructin Cntractr shall review and/r mdify the EHASP apprpriately t ensure that adequate engineering cntrls r prtectin prtcls will be implemented t prtect the site wrkers. The mnitring f cnstructin cntractr persnnel fr hazard expsure shall be cnducted s as t maintain the prper level f persnal prtectin, including actin level f prtectin; Level f training required fr all specified Cntractr(s) r Subcntractr persnnel t all identified physical and chemical hazards. Such ptential trainings will include, but nt be limited t, lead and hazardus materials awareness training, the 40 hur Hazardus Waste Operatins and Emergency Respnse Training Prgram, and the assciated 8 hur refresher training in accrdance with Title 29, Cde f Federal Regulatins , and 8 CCR 5192 fr all persnnel wh will cme in direct cntact with surface and subsurface chemical impacted sils when perfrming their wrk. Cntractrs shall maintain and prvide all training recrds t the Prt upn request; Prvisin f sufficient persnnel prperly trained t handle, excavate and dispse f hazardus waste and ther cntaminated waste, if any. The training shall be, but nt limited t, in accrdance with 29 CFR , 29 CFR , 8 CCR 5144, and 8 CCR 5192; All requirements f the Cnstructin Cntractr and Subcntractrs fr all applicable medical surveillance prgrams and Injury and Illness Preventin Prgram (IIPP), Cnstructin Standard; Wrkers Right t Knw; Califrnia Labr Cde; the San Francisc Health Cde, the Americans with Disabilities Act (ADA), and ther applicable federal, state, and lcal regulatin fr wrker safety; Methds t be used t decntaminate equipment; Sanitatin facilities t be prvided fr persnal hygiene; and Cntingency Plan fr emergencies including fire, spillage f hazardus/txic wastes and liquids (with special emphasis t clean up f spillage due t fuel/il frm cntractrs equipment), traffic accident, persnal accident, pwer failure, r any event that may require mdificatin r abridgment f site cntrl and decntaminatin prcedures. As presented abve, the Prt des nt anticipate grundwater t be encuntered based n the planned excavatin and cnstructin activities at the Prject Site. Hwever, if grundwater is encuntered during cnstructin activities, the Cnstructin Cntractr shall develp and implement health and safety precautins t minimize the expsure f grundwater t cnstructin wrkers. 4.8 CONTINGENCY PROTOCOL In the event f encuntering an envirnmental cntingency situatin (such as a sign f unknwn chemical cntaminatin in sil and grundwater, r the presence f an unknwn undergrund strage tank [UST]) at the Prject Site during cnstructin, the cnstructin cntractr will immediately suspend all wrk at the area where the situatin is bserved, and ntify the Prt. The envirnmental persnnel 4 6 Versin2 Q:\2012 Prjects\ TT AEW_JV TA 12 Prt f SF Bayview Article 22A\SMP\V2\Bayview Final SMP_V2.dcx

19 Sectin 4 Site Mitigatin and Management Measures During Prject Cnstructin f the Prt will evaluate and direct the cnstructin cntractr t implement the apprpriate respnse actins t address such cntingency, and if necessary, will ntify SFDPH regarding the situatin and the prpsed respnse actins. If needed, the Prt will request the participatin f a qualified envirnmental cnsultant t assist in develping the apprpriate respnse actins. In the event that a UST is fund and requires remval, the Prt will engage a licensed UST remval cntractr t remve the UST. Prir t the remval, the apprpriate permits frm the SFDPH s Hazardus Unified Prgram Agency and the San Francisc Fire Department will be btained. In additin, the required ntificatin will als be made t Bay Area Air Quality Management District (BAAQMD). 4 7 Versin2 Q:\2012 Prjects\ TT AEW_JV TA 12 Prt f SF Bayview Article 22A\SMP\V2\Bayview Final SMP_V2.dcx

20 Sectin 5 Site Management Measures After Prject Cnstructin 5 SITE MANAGEMENT MEASURES AFTER PROJECT CONSTRUCTION The pst cnstructin prtin f this SMP addresses the precautins that will be undertaken by the Prt t mitigate the lng term human health and envirnmental risks frm the Prject Site after all cnstructin activities are cmplete. Any future reuse f the Prject Site that will invlve the disturbance f subsurface media must be cnsistent with the bjectives f this sectin f the SMP. Ptential pst cnstructin management measures include: Site Inspectin t ensure the cap integrity; Establishment f prtcls t prtect n site wrkers engaged in activities with ptential fr direct cntact f native sil such as buried utility repair, repair wrk n shreline prtectin, r activities with ptential expsure f sil and/r grundwater; Preventin f the use f grundwater under the Prject Site; Agency Ntificatin n Change in Prperty Use. 5.1 SITE INSPECTION The cncrete and asphaltic capping area at the Prject Site will be inspected annually fr cracks and breaks. Any cracks and breaks identified during inspectin will be repaired t ensure the functining f the cncrete and asphaltic area as a physical barrier fr preventing direct expsure f subsurface sil t humans and the envirnment. The site inspectin will be recrded n site inspectin written lgs and maintained in Prt f San Francisc s ffice. The site inspectin lgs can be prvided t SFDPH fr review upn request. 5.2 PROTOCOLS FOR FUTURE SUBSURFACE DEVELOPMENT Health and safety prcedures will be fllwed as described in Sectin 4.5 fr all individuals engaged in activities that will ptentially cntact sil and/r grundwater at the site. Such likely scenaris include buried utility repair and general site maintenance. At a minimum, an Envirnmental HASP will be prepared and implemented when any wrk f this type is required. If sil excavatin r disturbance is undertaken in the future, the wrk will again fllw the guidelines fr sil management as described in Sectin 4.4. If any dust generating activity is cnducted, the wrk will als fllw the guidelines fr dust cntrl and mnitring as described in Sectin USE OF GROUNDWATER The shallw grundwater under the Prject Site and under the surrunding general area shall nt be used as a surce f drinking water r fr any ther purpse. 5 1 Versin2 Q:\2012 Prjects\ TT AEW_JV TA 12 Prt f SF Bayview Article 22A\SMP\V2\Bayview Final SMP_V2.dcx

21 Sectin 5 Site Management Measures After Prject Cnstructin 5.4 AGENCY NOTIFICATION ON CHANGE IN PROPERTY USE It is nt anticipated that the site use as a park will be changed in the future. In the event that such a prperty use change is made, ntificatin f such change will be made t San Francisc Department f Public Health prir t such change ccurring. 5 1 Versin2 Q:\2012 Prjects\ TT AEW_JV TA 12 Prt f SF Bayview Article 22A\SMP\V2\Bayview Final SMP_V2.dcx

22 Sectin 6 References 6 REFERENCES AEW Engineering, Inc. (2013). Final Envirnmental Characterizatin Reprt, Article 22A Cmpliance, Bayview Gateway Park Prject, San Francisc, Califrnia dated February, 2013 and prepared by AEW. Treadwell and Rll, 2011a. Site Histry Assessment, Prpsed Illinis Street Bridge, San Francisc, Califrnia, dated Octber, 2011 and prepared by Treadwell and Rll. Treadwell and Rll, 2011b. Envirnmental Site Characterizatin, Prpsed Illinis Street Bridge, San Francisc, Califrnia, dated Nvember, 2011 and prepared by Treadwell and Rll. Actn Mickelsn Envirnmental, Inc. Site Investigatin Reprt and Wrk Plan fr Additinal Site Characterizatin, dated December, 2011 and prepared by Actn Mickelsn Envirnmental, Inc. RWQCB, Screening fr Envirnmental Cncerns at Sites with Cntaminated Sil and Grundwater, dated May RWQCB, Letter: Clarificatin f the AB2061 Prcess, Clarificatin f the Califrnia Integrated Waste Management Bard (CIWMB) letter dated April 4, 2001, and Develpment f a Prtcl fr Management f Methane, Missin Bay Prject Area, City and Cunty f San Francisc. 6 1 Versin 2 Q:\2012 Prjects\ TT AEW_JV TA 12 Prt f SF Bayview Article 22A\SMP\V2\Bayview Final SMP_V2.dcx

23 Figures FIGURES Q:\2012 Prjects\ TT AEW_JV TA 12 Prt f SF Bayview Article 22A\SMP\V2\Bayview Final SMP_V2.dcx

24

25

26 Appendix A SFDPH Envirnmental Characterizatin Reprt Apprval Letter and SFDPH Site Mitigatin Plan and Dust Cntrl Plan Review Letter APPENDIX A SFDPH ENVIRONMENTAL CHARACTERIZATION REPORT APPROVAL LETTER AND SFDPH S SITE MITIGATION PLAN AND DUST CONTROL PLAN REVIEW LETTER Q:\2012 Prjects\ TT AEW_JV TA 12 Prt f SF Bayview Article 22A\SMP\V2\Bayview Final SMP_V2.dcx

27

28

29

30

31

32

33 Appendix B Dust Mitigatin Plan APPENDIX B DUST MITIGATION PLAN Q:\2012 Prjects\ TT AEW_JV TA 12 Prt f SF Bayview Article 22A\SMP\V2\Bayview Final SMP_V2.dcx

34 Appendix B Dust Mitigatin Plan B DUST MITIGATION PLAN This appendix presents dust cntrl and mnitring prtcls t be implemented by the Cnstructin Cntractr and the Prt during dust generating activities at the Prject Site. This plan is develped t cmply with the San Francisc Department f Public Health s Article 22B requirement fr dust cntrl. B.1 POTENTIAL MAJOR DUST GENERATING ACTIVITIES Majr field activities that may generate dust include, but are nt limited t, the fllwing: Demlitin f the existing timber wharf; Rehabilitatin f the seawall; Remval f the current asphalt lt and transfrming int green space with walkways; and Cnstructin/installatin f plaza spaces and green spaces fr use by the general public. B.2 DUST CONTROL AND MITIGATION PROTOCOLS This sectin presents dust cntrl and mitigatin prtcls that will be implemented t cntrl ptential dust impacts t human health and the envirnment during the field activities as described in Sectin A.1. Dust cntrls will als be implemented t prevent ff site dispersal and accumulatin f site sil and dust, as well as t cmply with applicable regulatins pertaining t air quality and nuisance cntrl. In additin t this plan, an Envirnmental Health and Safety Plan (EHASP) will be develped and implemented by the cntractr during field activities t address ptential wrker expsure t physical, chemical, and ther hazards and apprpriate wrker prtectin measures t mitigate such hazards. The Cnstructin Cntractr and its subcntractrs shall minimize dust generatin by implementing all apprpriate measures during Prject Site activities which will include but nt be limited t the fllwing: Water will be sprayed at a minimum f three times per day t suppress dust during the remval, placement, r mvement f sil and all dust generating activities as described in Sectin B.1 at the Prject Site during cnstructin, and at unpaved active cnstructin areas. In additin, befre cmmencing sil remval r any sil mvement activity during site cnstructin, water will be applied t the sil activity areas t reduce dust generatin. Wrkers cnducting sil remval and handling activities will maintain cntrl f dust generatin thrugh careful manipulatin f the sil. Nn active stckpiles, if any, will be cvered with plastic and anchred with sandbags r ther apprpriate weights t prevent the cvers frm being blwn ff by wind. Water will be sprayed n the active face f the stckpiles, pen excavatin area, and disturbed sil surfaces as necessary t ensure that wind ersin is minimized (at a minimum f three times per day). Over watering, which culd result in excessive runff will be avided. Any pen excavatin areas and disturbed sil surfaces will be watered as needed t cntrl dust generatin (a minimum f three times per day); B 1 Q:\2012 Prjects\ TT AEW_JV TA 12 Prt f SF Bayview Article 22A\SMP\V2\Bayview Final SMP_V2.dcx

35 Appendix B Dust Mitigatin Plan Heavy equipment peratrs will be instructed t keep drp heights t a minimum and cnduct peratin with cautin when handling sil in rder t reduce airbrne emissins; Sil remval, handling and mvement, excavatin, grading r truck lading will nt be cnducted when wind speeds exceed 15 miles per hur (mph) based n 15 minute average r are great enugh t create visible dust emissins utside the active wrk zne despite the implementatin f emissin cntrl measures; Trucks will be inspected and washed dwn prir t leaving the site t ensure that sil material des nt extend abve the sides r tp f the truck; Wind screens will be installed n fences alng the site bundary t reduce ptential dust migratin t ff site area; Internal truck rutes and unpaved cnstructin areas will be watered just prir t the mrning and evening peak traffic perids (t limit the ptential fr majr radway traffic t entrain dust), and prir t any grund disturbance t prevent visible emissins frm crssing the site bundary t neighbring prperties; All truck, equipment, and vehicle will be limited t 10 mph r less; Active sites (e.g., where excavatin r ther earth wrk is underway) will be watered at least three times per day. Frequency f watering will be increased when wind speeds exceed 15 mph; Gravel will be placed at cnstructin equipment entrances t site entrance t prevent tracking f dirt and mud nt streets; Access rads including site entrance, parking areas, and cnstructin staging areas will be wet swept at the end f day; Visible track ut n the paved public rad will be cleaned using wet sweeping r a HEPA filter equipped vacuum device immediately and n later than the end f the respective wrking day; Adjacent city streets will be swept at the end f each active cnstructin day if any visible sil material is carried ver t these streets; All trucks hauling dirt, sand, sil, r ther lse materials will be cvered. At least six inches f freebard will be maintained between the tp f the lad and the tp f the trailer. Truck will be maintained such that n spillage will ccur frm hles r ther penings in carg cmpartments. Lads will be adequately wetted and cver with traps; Dirt r debris spilled nt paved surfaces will be swept up immediately t reduce resuspensin f particulate matter thrugh vehicle mvement ver these surfaces; A persn r persns will be designated by the cntractr t versee the implementatin f a cmprehensive dust cntrl prgram and t increase watering, as necessary; Cnstructin equipment will be maintained and perated t minimize particulates frm exhaust emissins. During cnstructin, cntractr and subcntractrs will be required B 2 Q:\2012 Prjects\ TT AEW_JV TA 12 Prt f SF Bayview Article 22A\SMP\V2\Bayview Final SMP_V2.dcx

36 Appendix B Dust Mitigatin Plan t perate trucks and equipment nly when necessary. Equipment shuld be kept in gd cnditin and well tuned, t minimize exhaust emissins; and Ordinance , passed by the Bard f Supervisrs n May 6, 1991, requires that nn ptable water be used fr dust cntrl activities. Therefre, the cntractr and its subcntractrs shall btain reclaimed water frm the Clean Water Prgram fr this purpse. B.3 DUST MONITORING PROTOCOLS This sectin presents the dust mnitring t be perfrmed during the cnstructin at the Prject Site when dust generating activities are cnducted. The purpse f the dust mnitring is t ensure that dust level t ff site receptrs wuld nt exceed the prpsed dust actin level fr this prject. The dust actin level is presented in Sectin B.3.1. The ttal dust level fr wrker prtectin will be established and mnitred by the Cnstructin Cntractr in accrdance with the Envirnmental Health and Safety Plan during field activities t address ptential wrker expsure t dust and t implement additinal wrker prtectin measures, if warranted. B.3.1 PROPOSED DUST ACTION LEVELS Particulate Matter (PM 10 ) will be used fr establishing the ff site receptr dust actin level fr this prject. The ambient PM 10 actin levels at the Site Bundary are as fllws: 250 micrgram per cubic meter (µg/m 3 ) fr each 10 minute average reading. If this actin level is exceeded, the Cnstructin Cntractr will suspended the activities resulting the exceedence and apply mre aggressive dust cntrl measures until the 10 minute average reading falls belw this actin level; and Average 50 µg/m 3 fr a 24 hur active cnstructin perid (assuming 8 hur per day f active cnstructin, this will represent an average measurement ver 3 [three] 8 hur cnstructin days). In the event that this actin level is exceeded, the Cnstructin Cntractr will immediately review wrk prcedures fr cnfrmity with the dust mitigatin plan and the site specific SWPPP, and will identify and implement additinal dust cntrl measures as needed t prevent future exceedence f this actin level. B.3.2 PROPOSED DUST MONITORING PROTOCOLS Dust mnitring will cnsist primarily f direct reading instrumentatin (i.e., Mini Ram, Dust trak) t measure ttal particulate levels in the wrk areas thrughut the active wrk schedule. The dust mnitr will be used t determine fugitive emissins in the ambient air within the Site. The instruments measure ttal particulate levels and nt specific cntaminants. The dust level mnitring fr ff site receptrs will be perfrmed by the Prt r the Prt s cnsultants in accrdance with the fllwing prcedures: Dust mnitring will be cnducted cntinuusly during the first tw days f a new activity invlving dust generating activities ver the curse f an active cnstructin perid f the wrk day (assuming apprximately eight hurs per wrk day). The dust mnitring will be perfrmed using direct reading dust meter (i.e., Mini Ram, Dust trak) at the fllwing lcatins: B 3 Q:\2012 Prjects\ TT AEW_JV TA 12 Prt f SF Bayview Article 22A\SMP\V2\Bayview Final SMP_V2.dcx