Transcription

DraftConstruction Work PlanNon-Public PropertiesNewhall StreetNeighborhood SiteHamden, ConnecticutRevision 0Prepared for:Olin CorporationCleveland, TennesseeFebruary 2009

CONSTRUCTION WORK PLANNON-PUBLIC PROPERTIES, NEWHALL STREET NEIGHBORHOODHAMDEN, CONNECTICUTTABLE OF CONTENTSINTRODUCTION . 1SITE HISTORY . 1PRE-CONSTRUCTION PREPARATION ACTIVITIES . 2REMEDIAL CONSTRUCTION ACTIVITIES. 4MOBILIZATION . 5SITE PREPARATION . 8CLEARING AND GRUBBING . 14DEMOLITION AND REMOVAL OF ABOVE GROUND ITEMS . 15EXCAVATION, TRANSPORTATION AND DISPOSAL OF IMPACTED FILL MATERIAL . 15General . 15Excavation Operations in the Backyards of the Properties . 19Excavation Operations at Sides and Front yards of the Properties . 20Excavation of Block Areas N, R and S . 22Excavation of Block Areas H and J . 22BACKFILL/UTILITY REPLACEMENT. 23RESTORATION . 25DEMOBILIZATION/WINTER SHUT DOWN . 25February 2009i

CONSTRUCTION WORK PLANNON-PUBLIC PROPERTIES, NEWHALL STREET NEIGHBORHOODHAMDEN, CONNECTICUTLIST OF APPENDICESAPPENDIX AOVERALL PROJECT AREA (FIGURE 1) . A-1PROPOSED PRIMARY STAGING AREA (FIGURE 2) . A-2AREA “N SITE PREPARATIONS (FIGURE 3) . A-3AREA “R & S” SITE PREPARATIONS (FIGURE 4) . A-4AREA “H & J” SITE PREPARATIONS (FIGURE 5) . A-5February 2009ii

CONSTRUCTION WORK PLANNON-PUBLIC PROPERTIES, NEWHALL STREET NEIGHBORHOODHAMDEN, CONNECTICUTIntroductionThe intent of this Construction Work Plan is to present the general sequence of pre-constructionand construction/remediation activities which are planned to take place at the Non-PublicProperties, Newhall Street Neighborhood Site in Hamden, Connecticut. In addition, this plansummarizes the proposed methodology for performing various phases of the work. It describespossible equipment and personnel to be used, general sequencing of the work activities, the useof the site for staging, stockpiling and other activities, and security. This work plan has beenprepared in coordination with the Health and Safety Plan (HASP), Quality Assurance Project Plan(QAPP), Transportation/ Consolidation Plan, Dust Control Plan, and the Sampling and AnalysisPlan.Site HistoryThe Newhall Street Neighborhood is located in the southern part of Hamden, Connecticut, east ofDixwell Avenue and just north of New Haven. The Newhall Street Neighborhood is approximatelyan 18-block area that historically consisted of wetlands and low-lying areas. Waste materialswere used to fill these areas from the late 1800s to the mid-1900s. Subsequently, homes, publicbuildings, and parks were built on and next to the historic fill areas.The Non-Public Properties (NPP) consent order boundary is approximately an 18-block areaconsisting of approximately 230 residential properties. For ease of geographic reference, the cityblocks within the consent order boundary are given letters A, C, E, F, H, J, K, L, M, N, P, Q, R, Sand T. Refer to Appendix A, Figure 1 for details.In October 2007 the Connecticut Department of Environmental Protection (CTDEP) issued a finalRemedy Selection Plan for the Site. The selected remedy for the approximately 230 residentialproperties (and other Non-Public Properties) located inside the Consent Order boundary is asfollows:1. Excavation of fill within the top 4 feet and off-site disposal at authorized facilities.2. Backfilling with clean soil.February 20091

CONSTRUCTION WORK PLANNON-PUBLIC PROPERTIES, NEWHALL STREET NEIGHBORHOODHAMDEN, CONNECTICUT3. Restoration of pre-existing features (landscaping, patios, fencing, driveways, etc.) ifdisturbed during construction.Pre-Construction Preparation ActivitiesPrior to the start of any construction and remediation of properties within the NPP Consent Orderboundaries, the following pre-construction preparation activities will be implemented andmaintained throughout the course of the project:1. Documentation of existing conditions at each individual property will be performed,consisting of the following: Existing physical conditions and existing landscape and other site features will beinspected and documented. Individual property sketches will be developed detailing the existing conditions ofeach property. The documentation, including photographs and video, will beused to verify structural conditions and restoration features followingconstruction.2. The development of Property-Specific Remedial Action Plans (RAPs) for each individualproperty, and approval of the Property-Specific RAPs from DEP.3. Receipt of signed Temporary Access Agreements with individual property owners.4. A topographic survey will be performed, utilizing a licensed surveyor in the State ofConnecticut, to verify and establish existing conditions to allow proper restoration of allexisting features removed during Work.5. Receipt of work plan approvals from Olin and the CTDEP. Anticipated work plans toinclude: A Construction Work Plan (this document) that describes the means and methodsfor executing the Work, including general sequencing of the Work, excavationprocedures, the use of the Site for staging, stockpiling, and other activities,February 20092

CONSTRUCTION WORK PLANNON-PUBLIC PROPERTIES, NEWHALL STREET NEIGHBORHOODHAMDEN, CONNECTICUTsecurity measures and personnel to secure the Site work areas, contractorsequipment and materials as well as protecting the residents and private propertyduring non-working hours including weekends and holidays and where residentshave been temporarily relocated. A Health and Safety Plan that defines the requirements and designates protocolsto be followed during remedial action at the site, to maintain safe and healthfulworking conditions, to provide and ensure the use of all necessary personnelprotection equipment to assure the safety and health of site employees and thegeneral public, to require that site work be planned to provide a range ofprotection based on the degree of hazards encountered under actual workingconditions and provide workers with the information and training required tomake them fully aware of known and suspected hazards that may beencountered, and of the appropriate methods for protecting themselves, theirco-workers, and the public at large. Work performed under this contract willcomply with applicable Federal, State and Local Safety and Occupational Healthlaws and regulations. A Construction Quality Control Plan identifying personnel, procedures,instructions, records and forms to be used in carrying out the requirements ofthe Project. It will provide the means to maintain effective Quality Controls forconstruction, sampling and testing activities. A Quality Assurance Project Plan which describes the quality assurance, qualitycontrol, and other technical activities that will be implemented to ensure thatsampling and analyses are performed in order to meet applicable data qualityobjectives for the project. A Dust Control/Air Monitoring Plan detailing the requirements to minimize dustgeneration during work execution and the necessary air monitoring that will beimplemented to identify and quantify safety and health hazards and airbornelevels of particulates or dust. The air sampling program will be used to assureproper selection of engineering controls, work practices and personal protectiveFebruary 20093

CONSTRUCTION WORK PLANNON-PUBLIC PROPERTIES, NEWHALL STREET NEIGHBORHOODHAMDEN, CONNECTICUTequipment for affected site workers and will also evaluate the potential impactsto adjacent residences. A Transportation and Consolidation Plan that will include the proposed disposalfacilities for waste materials that do not meet the acceptability criteria for theTire Pond, Tire Pond management procedures, proposed traffic routes for haultrucks, recordkeeping and spill response procedures. A Sampling and Analysis Plan that describes the sampling and analysis to supportthe remediation.6. Identification of the off-site fill borrow sources and the performance of the requiredgeotechnical and analytical testing of the fill materials proposed for the project.7. Negotiations with the Town of Hamden to utilize Mill Rock Park (Rochford Field Annex) asa primary staging area for the staging of temporary office trailers, employee parking lot,equipment lay-down, material lay-down, temporary stockpiling area for clean fill materialsand a temporary stockpiling/loading area for excavated impacted fill.8. Coordination with local utility companies (Town of Hamden, Regional Water Authority,Southern Connecticut Gas Company, Greater New Haven Water Pollution ControlAuthority, AT&T and United Illuminating). The impact to utilities and the need to removeor replace services for individual properties will be determined and where serviceconnections will be affected, residents will be notified as soon as possible of the expectedschedule and duration of utility service interruptions, if required. In addition, “Call BeforeYou Dig” notification will also be conducted before excavation activities begin for markingof existing utilities.9. Obtaining construction related permits.Remedial Construction ActivitiesBased on the Generic Remedial Action Plan, the total remediation of the Non-Public Properties isto be completed in phases and is presently scheduled to take approximately two to four years toFebruary 20094

CONSTRUCTION WORK PLANNON-PUBLIC PROPERTIES, NEWHALL STREET NEIGHBORHOODHAMDEN, CONNECTICUTcomplete. The smaller isolated areas in blocks M, N, R, and S may be performed concurrentlywith other phases. A preliminary phasing plan is included in the Generic Remedial Action Plan,however, the actual phasing will be dependent on obtaining access agreements. Actual phasinglimits and timing will be adjusted based on the ability to obtain property access and restorationagreements as well as the availability of funding.Tentatively, mobilization and remediation construction activities for the NPP are scheduled tocommence in the spring/summer of 2009. It is anticipated that Phase I operations will consist ofthe remediation of isolated areas located in blocks N, R and S followed by remediation of blocks Hand J.Remedial construction activities will consist of mobilization to the jobsite, site preparations,clearing and grubbing, removal, disposal and/or storage of above ground items, excavation,transportation and disposal of impacted fill material, backfilling of areas of excavation, utilityrelocation/replacement, restoration and demobilization.Listed below are the remedial construction activities which detail the sequence of work, themeans and methods, and the anticipated equipment that will be utilized to perform theremediation of the Non-Public Properties in Hamden, Connecticut.MobilizationUpon award of the Contract and authorization to proceed, mobilization activities will commence.Mobilization will consist of the following:1. Mobilization of necessary labor, materials, equipment, tools, and supervision tocommence work on the project.2. Continued processing of the required submittals which includes administrative andprocedural requirements for submitting project work plans, product data, samples andany other submittals required in the Project Specifications.3. Performance of pre-construction activities, previously detailed, on a continual basis, toFebruary 2009ensure that as one phase of remediation is completed the next phase of remediation can5

CONSTRUCTION WORK PLANNON-PUBLIC PROPERTIES, NEWHALL STREET NEIGHBORHOODHAMDEN, CONNECTICUTcommence.4. The Contractor personnel, taking part in the active remediation activities, will receive therequi