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Federal Consistency Report Modular High Containment Facility October 2022 1 | P a g e FEDERAL CONSISTENCY REPORT FOR THE RELOCATION OF LABORATORY, ANCILLARY SUPPORT FACILLITIES, AND CRITICAL STORAGE CONTAINERS. PORTION OF REM. PLOT 11, ESTATE PENITENTIARY LAND CHRISTIANSTED, ST. CROIX, U.S.V.I. Prepared for: THE OFFICE OF COASTAL ZONE MANAGEMENT DEPARTMENT OF PLANNING AND NATURAL RESOURCES, AND THE GOVERNMENT OF THE VIRGIN ISLANDS Project Owner: VIRGIN ISLANDS DEPARTMENT OF HEALTH – GVI 3500 Estate Richmond, Christiansted, VI 00820 Project Address: Portion of Remainder, Plot 11, Estate Penitentiary Land Project Coordinates: 17 44’49.30” N, 64 42’47.92” W Property ID: 2-04900-0103-00 Submitting Entity – Department of Health Prime Contractor: GERMFREE LABORATORIES 4 Sunshine Blvd., Ormond Beach, FL 32174 Prepared by: J. BENTON CONSTRUCTION; SILVERBERG ASSOCIATES VI, P.C.; PAUL FERRERAS, PE OCTOBER 27, 2022 Federal Consistency Report Modular High Containment Facility October 2022 2 | P a g e Table of Contents INTRODUCTION ………………………………………………………………………………….. 3 PROJECT LOCATION …………………………………………………………………………….... 4 PROJECT DESCRIPTION …………………………………………………………………………... 5 ENVIRONMENTAL IMPACTS 1.0 Climate & Weather ……………………………………………………………………… 6 2.0 Landform Geology, Soils, and Historic Land Use ……………………………………… 7 3.0 Drainage, Flooding, and Erosion Control ………………………………………………… 7 4.0 Drainage Patterns ………………………………………………………………………… 7 5.0 Coastal Floodplain ……………………………………………………………..………… 7 6.0 Fresh Water Resources …………………………………………………………………… 8 7.0 Oceanography …………………………………………………………….……………… 8 8.0 Marine Resources ………………………………………………………………………… 8 9.0 Terrestrial Resources ……………………………………………………………………… 8 10.0 Wetlands …………………………………………………………………………………. 9 11.0 Rare and Endangered Species …………………………………………………………… 9 12.0 Air Quality ……………………………………………………………………………..… 9 IMPACT ON MAN’S ENVIRONMENT 13.0 Land and Water Use plans ……………………………………………………………..… 9 14.0 Visual Impacts ………………………………………………………..………………..… 10 15.0 Social and Economic Impacts ………………………………………..………………..… 10 16.0 Historical and Archeological Resources ………………………………………………..… 11 17.0 Waste Disposal and Accidental Spills …………………………………………………..… 11 COASTAL CONSISTENCY ………………………………………………….……………………..… 12 HYDROLOGICAL REPORT – Appendix A…….……………………………………………………... 13 SUPPORTING DRAWINGS – Appendix B…….……………………………………………………… 23 G100 – Cover Sheet A301 – Bldg. Elevations C1.07 – Stormwater Details A001 – Overall Layout A302 – Elevs. & Details A100 – Impervious Area Plan A401 – Site Sections A101 – Partial Plan – Labs C1.01 – Erosion Control + Utility Site Plan A102 – Partial Plan – Infrastr. C1.02 – Grading Plan A201 – Foundation Layout C1.06 - Details + Sewer & Water Federal Consistency Report Modular High Containment Facility October 2022 3 | P a g e INTRODUCTION On September 7, 2017, and September 16, 2017, Hurricanes Irma and Maria significantly damaged Department of Health (DOH) facilities throughout the three islands of the USVI. These back-to-back Category 5 hurricanes caused catastrophic structural damage and flooding to the Charles Harwood Medical Center (CHMC) and its six (6) outbuildings on the St. Croix campus. Resulting damages to the CHMC were so severe, a replacement for the Charles Harwood Medical Center was authorized by FEMA. As an interim measure to restore the critical functions of the VIDOH Laboratory, a new BSL-3 Temporary Laboratory was required. Public Health Laboratories (PHL) focus on diseases and the health status of population groups. They perform limited diagnostic testing, reference testing, and disease surveillance. They also provide emergency response support, perform applied research, and provide training for laboratory personnel. The Laboratory and its auxiliary equipment are a “permanent self-contained secure high containment Lab that will complement future clinical laboratories in the new proposed DOH building”. It is a highly complex multi- million-dollar facility approved and funded by the Center for Disease Control (CDC). By itself, the space allotted to new lab functions in the proposed Charles Harwood Hospital will not be sufficient for a long-term public health lab. However, the provision of the GermFree Lab, along with allotted clinical lab space in the new hospital, will be adequate to perform the requisite testing, in a secure, non-public facility. The decision to relocate the Labs and its storage facilities to this specific new location was based on its proximity to the Charles Harwood Hospital complex, which is one block away. This will allow for efficient and swift provision of services for the hospital and precludes the need to hire additional staff for another offsite location. This new location will keep it within proximity of the newly built hospital complex and allow for ease of services between the Lab, the hospital, and its onsite clinics. In addition to relocating existing modular laboratory facilities, VIDOH has contracted with Germfree Labs Inc. (GLI) to construct an adjacent new modular high containment facility on this plot of land. An existing Emergency Medical Services modular office building, supporting regulatory functions, will also be relocated to a portion of this site as part of this project. The importance of the smooth and continued operation of these facilities in service of the public health of the island’s residents cannot be overstated. The Department of Health Lab is the only public health lab facility in the Territory. The Lab and its staff have been highly instrumental in the success of the USVI Department of Health’s response to the COVID-19 pandemic, by providing professional expertise, guidance, technical support, and testing, at a critical time in the Territory’s history. Currently and in the future, it stands equipped and ready to meet the future testing response needs of the Territory. Federal Consistency Report Modular High Containment Facility October 2022 4 | P a g e LOCATION OF PROJECT The project location is located within the north side, central area on the island of St. Croix, to the west of the heart of Christiansted, the main urban area on the island. Figure 1 – Overall Island Location Map. Figure 2 – Greater Christiansted Location Map. LOCATION DESCRIPTION The project location is a portion of Remainder Plot 11, Estate Penitentiary Land, to the North of the Charles Harwood Hospital Complex. This land was previously developed for the Ralph de Chabert housing project, which as demolished in 2015. The overall acreage of the site in question is 2.6 acres (less than 1 acre of this area will be disturbed). This 2.6 acres does not include acreage to the south of the site that was recently utilized for a new parking area in support of the Department of Health temporary facilities. The decimal degrees GPS coordinates for the site can be found at Latitude 17.74694693828904, Longitude -64.70966831804833. The site is within the R-3 zone, and a fuller description of the zoning parameters can be found within Section 13.0 of this report. The area surrounding the project is a quiet, formerly residential area, comprised of unoccupied land where the now-demolished residential structures once were. A block immediately to the east of the site is a well- established neighborhood of modest, single-family residences, as well as the offices for the VI Government’s Property and Procurement. To the south of the site sits much of the Department of Health’s facilities, including its current temporary offices, associated parking, and the Charles Harwood Medical Center itself. There are no other active facilities – public, retail, commercial, etc. – immediately nearby. The condition of the surrounding streets are passable but marginal, with the street at the north end of the site requiring additional repair upgrades in order for it to be serviceable. The nature of these repairs are currently a matter of discussion with the Department of Public Works. Regardless, the improvements via the relocation and construction of the new GermFree Labs, will unquestionably serve to reinvigorate and enhance security within this neighborhood. PROJECT AREA Federal Consistency Report Modular High Containment Facility October 2022 5 | P a g e PROJECT DESCRIPTION The project’s area measures approximately 230 feet by 210 feet, or just over one acre of land. The area of actual disturbance within this overall project footprint is approximately 41,000 square feet (0.94 acres). While this land is currently covered with scrub vegetation, this site was previously built upon, most recently as a housing development that was demolished in 2015 (see below). The land in question is currently being leased from the VI Housing Authority for the purposes of this project. The proposed layout for buildings and improvements on the site is shown in the figure on the next page (Figure 3). All buildings – new and relocated - are modular construction, and new foundations will be provided to support them above grade. The majority of the disturbed area on the site will be impervious coverage, and a new underground stormwater retention system has been designed as part of the site improvements to handle this run-off. Gravel surfaces have been provided in support of utilitarian areas. The buildings that are denoted on the plan as laboratories will provide essential services for the Virgin Islands Department of Health (VIDOH) related to public health testing. These buildings will require emergency power during utility outages and onsite generators have been included in the layout. The building designated as the EMS Regulatory office building will house Emergency Medical Service Regulatory employees performing office functions. There will not be any treatment of individuals or repair of vehicles at this location. Off-street parking has been provided for each set of buildings, and the entire site will be protected with a new security fence. Primary vehicular access onto both the Germfree and EMS portions of the site will be via gated, secured entrances at the north side of the site. Secondary access onto the site is provided via a gated entry to the west. Enhanced site lighting will be provided along the north side of the site. Figure 3 – Existing Site Conditions Photos. Federal Consistency Report Modular High Containment Facility October 2022 6 | P a g e Figure 4 – Layout Plan. ENVIRONMENTAL IMPACTS 1.0 Climate and Weather Best Management Practices (BMPs) implementing sediment and erosion control measures will be utilized to ensure that rainfall runoff does not adversely impact the surrounding areas. These measures will include a combination of silt fences, gravel construction entrance and egress points, and hay bales. All structures will meet current building code requirements with respect to the region’s high velocity hurricane force wind load requirements and earthquake zone seismic requirements. Federal Consistency Report Modular High Containment Facility October 2022 7 | P a g e 2.0 Landform, Geology, Soils & Historic Land Use According to the Soil Survey of the United States Virgin Islands report, the primary soils associated with this site is UgC, Urban land-Glynn complex. UgC is composed of 80% UgC and 15% Glynn complex, with 0 to 12 percent slopes, and are rarely flooded. This map unit consists of Urban land and very deep, well drained alluvial soils. The Urban land soils typically exist in airports, shopping centers, parking lots, large buildings, streets, sidewalks, or other impervious surfaces. The landform position is on alluvial fans and terraces. The project area has been developed multiple times in the past, most recently as a housing development. The structures from that development were demolished and 2015 and the land has been left vacant up until now. 3.0 Drainage, Flooding & Erosion Control The project site is located in Zone X of the FEMA Flood Map for this area, indicating that it is outside of Flood Hazard areas. Drainage for stormwater is currently overland flow into the streets to the North and West of the property. As part of the improvements for this property, we are proposing an underground stormwater retention system to mitigate the increased impervious areas that will be created. During construction, erosion control measures will be undertaken, consisting primarily of hay bales or silt fencing at the North and West property borders. 4.0 Drainage Patterns Onsite drainage flows roughly parallel to the street at the West property line with an overall elevation change of approximately 8 feet over the 220’ length of the property. The low point of the property is at the intersection of the two paved streets that border the property. While the site will require some regrading, the overall drainage pattern for the site will be maintained. A new underground stormwater retention structure will be installed near the lowest point of the site to collect water that flows off of the impervious areas onsite. This retention structure will have an overflow that will allow excess stormwater to flow into the paved streets much in the same way that happens currently. The stormwater retention system has been sized to meet the needs of both the Germfree and EMS sites as per current DPNR stormwater management best practices. A Hydrological Report for the site can be found within Appendix A. 5.0 Coastal Floodplain The project site is located at approximately 29 to 37 feet above mean sea level. The relevant FEMA Flood Map for this area shows the project site within the Area of Minimal Flood Hazard or Flood Zone X (outside of the 500-year flood hazard area) Federal Consistency Report Modular High Containment Facility October 2022 8 | P a g e Figure 5 – FEMA Flood Map (detail). 6.0 Freshwater Resources Water supply for this site is primarily from the WAPA Municipal water service. This project proposes to connect to that system with a new valve box to be located at the nearest possible location, approximately 100 feet to the East of the property border. Best Management Practices will be undertaken during construction to limit any impacts to the local freshwater resources. 7.0 Oceanography The project site is outside of CZM Tier 1 and will not be affected by marine tides nor have any effect on marine resources. 8.0 Marine Resources The project site is outside of CZM Tier 1 and will not be affected by marine tides nor have any effect on marine resources. 9.0 Terrestrial Resources The project is on an urban site that has been extensively developed in the past. This new development is in keeping with the previous land disturbances and will not have any adverse effect on existing terrestrial resources. Federal Consistency Report Modular High Containment Facility October 2022 9 | P a g e 10.0 Wetlands There are no wetlands included within the project area. No wetlands will be affected by this project. 11.0 Rare and Endangered Species As an urban site, there are no rare or endangered species within the developed property, and the site is not critical habitat for any endangered species. There will be no impact on terrestrial rare or endangered species. 12.0 Air Quality All of St. Croix is designated Class II by the Environmental Protection Agency (EPA) in compliance with the National Ambient Air Quality Standards. In Class II air quality regions, the following air pollutants are regulated: open burning, visible air contaminants, particulate matter emissions, volatile petroleum products, sulfur compounds, and internal combustion engine exhaust (Virgin Islands Code Rules and Regulations). Heavy equipment such as excavators, backhoes, dump trucks etc. will be used during construction that will create engine exhaust fumes that will go away upon completion of construction when air quality will be returned to ambient pre‐construction conditions. As part of this project, stand-by generators will be installed onsite. These generators will serve as a backup power supply in the event of a utility power failure. This development includes medical laboratories that store materials that are sensitive to environmental changes and a long power outage would be deleterious to them. Additionally, the function of the laboratories needs to be maintained during and after the extreme weather events that are likely to cause power failures. This project will apply to DPNR for the proper construction and operation permits related to air pollution emission sources. The laboratory buildings that are part of this project will have self-contained Air Handling units with HEPA filters. The BSL2 and BSL3 modular laboratory systems are designed for the staff to handle any hazardous or potentially hazardous materials within the interior spaces (secondary containment) or the Class II equipment (primary containment). These spaces offer HEPA filtration exhaust units to protect the environment during normal operating procedures as well as any potential accidents which may occur. IMPACT ON MAN’S ENVIRONMENT 13.0 Land and Water Use plans The project site is zoned R-3 – Residential – Medium Density. While the proposed uses of the site are unique – medical laboratories and emergency services offices, the R3 zone does acknowledge and accommodate the general intent of these uses – via “hospitals and medical clinics” (i.e. medical), and “fire and police stations” (i.e. community-based emergency services). These uses are subject to further conditions as set forth within the Virgin Islands zoning code, within sections 231 and 232. Federal Consistency Report Modular High Containment Facility October 2022 10 | P a g e If the labs were treated to the same standards as a medical clinic (Section 231 (Subsection 20), items A- D), all conditions would be met. Similarly, if the EMS facility was treated to the same standards as a police or fire station (Section 231 (Subsection 14), items A-F), all conditions would be met. Section 232 (Planned area development) would not be applicable in this case. The site sits outside of CZM boundaries, as well as outside of other specific regulated coastal environments. 14.0 Visual Impacts The project site has been left as a vacant, undeveloped area for the past seven years, following the demolition of the Ralph de Chabert housing project. Development of the project site with modular structures that are performing a vital function for the island of St. Croix will have a positive impact for this underutilized location. The utilitarian modular buildings that will house the laboratories and accessory functions are one or two story which will fit in with the current low-rise character of the neighborhood. A new decorative metal picket fence will be constructed along the main street to the West of the property. Chain-link security fencing will be installed on the remaining sides of the property. Figure 6 – (a) Existing Lab Bldg. (b) Existing EMS Bldg. (c) Proposed Lab Bldg. Expansion 15.0 Social and Economic Impacts The Germfree Laboratories perform an integral service for the Department of Health. The continuing operation of these laboratories in proximity to the Harwood hospital complex will provide a valuable service towards supporting the health and wellbeing of the entire community. The good-functioning of the Emergency Medical Service is also a critical component for maintaining community well-being and healthcare standards in Christiansted and beyond. As part of this project, Germfree will be constructing an additional laboratory building to increase the amount of laboratory capacity available. This will allow for additional testing to be performed, and is projected to lead to timely testing results for the community (especially when critical), and a modest, but increased employment opportunity at this facility. This facility currently employs 9 full time people. An eventual increase of roughly three additional employees is anticipated once the new, expanded facility is in operation. Federal Consistency Report Modular High Containment Facility October 2022 11 | P a g e 16.0 Historical and Archeological Resources All of the project site has been extensively disturbed by past developments and has no known historical or archeological resources. A significant area of lab footprint sits in the same location as the previous, demolished housing structures. In response to a request for determination on the need for an archeological resources investigation, VISHPO Senior Archeologist David Brewer has noted that the site will not require a Phase 1 Archaeological Survey “due to the highly disturbed nature of the property due to previous land development”. 17.0 Waste Disposal and Accidental Spills The contractor-of-record has extensive experience and understanding of meeting all applicable on-island local and federal regulations related to solid waste disposal and accidental spills during construction. Although the site is vacant, intermingling of wastes will be avoided and any substances that exhibit hazardous waste characteristics will be managed to prevent a release to the environment. A copy of the construction firm’s Best Practices handbook and standards related to these subjects can be made available for inspection prior to the start of construction. Solid waste disposal for the completed project will be coordinated by the Department of Health in accordance with local regulations. In essence this will be a continuation of the solid waste disposal practices that have been ongoing for the current facility locations on the grounds of the Harwood hospital complex, one block to the South. Any potentially hazardous solid waste leaving the laboratories within the lab buildings will be sterilized using a steam sterilization process inside of an autoclave unit within the laboratory. After the sterilization process is complete, the products are safe to dispose of as common waste. Regarding liquid wastes, a portion of the laboratory facility will contain Biological Safety Level 3 (BSL3) labs. Plumbing systems within these labs are connected to an Effluent Decontamination System (EDS) for decontamination. The EDS mixes Sodium Hypochlorite (bleach) with waste water from the BSL3 spaces within the laboratory for a predetermined amount of time during operation. The unit uses 6% bleach at a mixture of 600-800 ppm at the discharge to sanitary drain and is automatically controlled by a float switch located in a HEPA filter ventilated holding tank supplied with the system. This tank collects all of the liquid waste from the BSL3 space drains before treatment and safe disposal in the municipal sewer system. The Auxiliary Labs and the BSL2 labs do not require effluent decontamination as they do not handle potentially hazardous materials, and the liquid waste from these labs will be connected to the municipal sewer system directly. In summary, all potentially hazardous solid waste will be sterilized before leaving the laboratories and all potentially hazardous liquid waste will be decontaminated by the EDS before entering the municipal sewer system. Federal Consistency Report Modular High Containment Facility October 2022 1 | P a g e COASTAL CONSISTENCY The proposed Modular High Containment Facility / EMS project, as proposed, will be undertaken in a manner consistent to the maximum extent practicable with the enforceable policies of the U.S. Virgin Islands’ Coastal Zone Management (CZM) program. This federal consistency determination request demonstrates the project’s compliance with the U.S. Virgin Islands’ CZM program. This project meets the basic goals set forth in the U.S. Virgin Islands Code Title 12, Conservation Chapter 21, Virgin Islands Coastal Zone Management [V.I. Code tit. 12, § 903(b)]. Additional details are as follows: 1. Protect, maintain, preserve and, where feasible, enhance and restore, the overall quality of the environment in the coastal zone, the natural and man-made resources therein, and the scenic and historic resources for the coastal zone for the benefit of residents of and visitors of the United States Virgin Islands. The development of the project site for use as a healthcare-oriented property and supporting EMS services is consistent with the character of the neighbor and will enhance the ability of the adjacent Harwood facility to meet its healthcare goals. The reinvigoration of activity on the site will help enhance a currently marginal neighborhood area. Furthermore, the improvement of this property, especially the installation of a stormwater detention system on the site, will have a net positive impact on the local environment. Best management practices will be undertaken during construction to manage erosion control and stormwater runoff as well as to limit disturbances within the local community. 2. Promote economic development and growth in the coastal zone and consider the need for development of greater than territorial concern by managing: (1) the impacts of human activity and (2) the use and development of renewable and nonrenewable resources so as to maintain and enhance the long-term productivity of the coastal environment. The use of modular containers to construct the laboratories and other buildings onsite allows for an increased efficiency for construction activities. The majority of construction is performed on a factory floor and in a manner whereby materials can be efficiently recycled or used to the maximum possible extent. Construction waste is kept to a minimum and is recycled where feasible. Completed modular containers are shipped to the project site where they are installed and connected to utility systems onsite. 3. Assure priority for coastal-dependent development over other development in the coastal zone by reserving areas suitable for commercial uses including hotels and related facilities, industrial uses including port and marine facilities, and recreation uses. The project location is outside of the CZM Tier 1 zone and will not impact development of the coastal zone for the benefit of the community. 4. Assure the orderly, balanced utilization and conservation of the resources of the coastal zone, taking into account the social and economic needs of the residents of the United States Virgin Islands. Locating this facility in proximity to the local Harwood health facility makes the best use of available resources. Travel between the Harwood facility and this facility can be easily accomplished without recourse to private or public transportation. 12 Federal Consistency Report Modular High Containment Facility October 2022 2 | P a g e 5. Preserve, protect and maintain the trust lands and other submerged and filled lands of the United States Virgin Islands so as to promote the general welfare of the people of the United States Virgin Islands. There are no trust lands or submerged and filled lands on the project site. This project will have no impact on such lands in the coastal zone. 6. Preserve what has been a tradition and protect what has become a right of the public by insuring the public, individually and collectively, has and shall continue to have the right to use and enjoy the shorelines and to maximize public access to and along the shorelines consistent with the constitutionally-protected rights of private property owners. The project site is contained by existing roadways and will not impede in any way the access for the public to the existing shorelines. 7. Promote and provide affordable and diverse public recreational opportunities in the coastal zone for all residents of the United States Virgin Islands through acquisition, development and restoration of areas consistent with sound resource conservation principles. Coastal zone recreational activities will not be affected by this project. 8. Conserve ecologically significant resource areas for their contribution to marine productivity and value as wildlife habitats, and preserve the function and integrity of reefs, marine meadows, salt ponds, mangroves and other significant natural areas. Locating this project away from the coastal environment will help to maintain the integrity of the natural area. Reutilization of a previously developed site helps to preserve and maintain existing wildlife habitats elsewhere. 9. Maintain or increase coastal water quality through control of erosion, sedimentation, runoff, siltation and sewage discharge. Best management practices will be undertaken during construction to manage erosion control and stormwater runoff. The completed facility will be connected to the existing sanitary sewer system. Installation of a new underground stormwater detention structure onsite will help to mitigate stormwater runoff. End, Federal Consistency Report 13 Hydrology Study Report Project Site: Germfree Labs Portion of Rem Plot 11 Estate Penitentiary Land Christiansted, St. Croix, VI IF 10/4/22 Introduction The site was previously developed and had VI Housing Authority buildings on the property. These buildings were demolished several years ago and now the site is currently overgrown with weeds with some bare soil areas. The proposed Germfree Labs site is approximately 0.85 acres and will consist of two 2-story lab buildings, four auxiliary lab buildings, a future trailer, storage containers, miscellaneous structures for the labs use and associated parking. Some of the site will be covered with gravel and paved parking areas. This study as with typical hydraulic studies for stormwater management will analyze the pre and post stormwater conditions and provide a storage volume. This site with utilize underground chambers for the retention of stormwater to address the increase in run-off generated by the proposed development of the site. Hydraulic Analysis The site slopes south to north and the stormwater will be collected with onsite storm drain inlets and trench drains which be directed into the underground chamber system for storage and release. Minimal off-site runoff intrudes onto the site. An ADS Storm Tech MC-3500 chamber system will be utilized as the type of underground chamber system. The one year 24-hour rain event was used for the determination of the storage volume required for the site. Topography TR-55 was used for determination of the pre and post condition values. First the soil name/type and hydrologic group was determined which the USVI Mapgeo database was used. The existing soil type of the site was found to be UgC which is Urban land-Glynn complex. In accordance with the Soil Survey of the USVI, UgC soils: consists of Urban land and very deep, well drained alluvial soils that are so intermingled that it was not practical to map them separately. The Urban land is composed of airports, shopping centers, parking lots, large buildings, streets, sidewalks, or other impervious surfaces. Closely associated areas, such as lawns, parks, vacant lots, and playgrounds, contain natural soils, but these areas were too small to be mapped separately. Soil Map The soil type along with the hydraulic condition and hydraulic soil group is used to determine the Runoff Curve numbers. For the pre-developed condition, the hydraulic condition used was good and the hydraulic group is B. Using these criteria, the Runoff Curve number for the existing condition was determined to be 48 (see Figure 1). Figure 1 The post development conditions for the site were assumed to be 100% impervious which results in a Runoff Curve number of 98. The next item used to determine the site runoff is the time of concentration (Tc). The predeveloped condition Tc was calculated as 0.08 hours and the post development as 0.01 hours. Worksheet 2 from TR-55 determines the runoff in inches for the pre and post development and are as follows: Pre development 0.09 inches Figure 2 Post development 2.97 inches Figure 3 The 24-hour rainfall depth in inches for the subject site for the one-year storm is 3.2 inches. Using worksheet 4 from TR-55 the peak discharge rates for the pre and post conditions are as follows: Pre development peak discharge 0.005 cfs (cubic feet per second) Figure 4 Post development peak discharge 1.9 cfs Figure 5 The storage volume required to retain the increase in runoff for the proposed site for the one year 24-hour rain event is 6400 cubic feet. The Storm Tech MC-3500 sized for the property will provide 6570 cubic feet of storage, which exceeds the requires 6400 cubic feet. Figure 2 Figure 3 Figure 4 Figure 5 Z 31.35 Z 31. E 1254757.163 N 627601.52 E 1 N 35 30 EXISTING GRADE 2 x 4 WOOD POSTS @ 8'-0" O.C. SILT TRENCH CUT INTO UPHILL SIDE AND LINED WITH FILTER FABRIC (FILL WITH ROCKS & SOIL) 3'-0" HIGH NYLON SILT FENCING 1'-6" MIN. SILT FENCE DETAIL SCALE: 1" = 1'-0" TAP INTO EXIST WATER LINE 1 C1.06 VALVE BOX 3"Ø HDPE 5 C1.06 3 C1.06 12x12x12 CONC THRUST BLOCK 2'-3" WIDE TRENCH NEW 3"Ø HDPE WATER LINE VALVE BOX SEE DETAIL METER 1"Ø VALVE 1"Ø 6"Ø (E) 6"Ø (E) 24.2 24.4 RIM 29.99 UTILITY SITE PLAN SCALE: 1" = 20' 1 C 1.01 SILT FENCE CO METER 1"Ø VALVE BOX 12x12x12 CONC THRUST BLOCK INV<32.0> 6"Ø SEWER LINE CO CO CO CO CO CO 1"Ø WATER 6"Ø SEWER CO 1"Ø 6"Ø SEWER NEW MANHOLE INV<27.0> INV<26.0> UNDERGROUND ELECTRIC - COORDINATE LOCATION AND SEE ELECTRIC PLANS AND SHEET C1.06 FOR TRENCH DETAILS EROSION AND SEDIMENT CONTROL NOTES: 1. THE CONTRACTOR SHALL FOLLOW ALL JURISDICTIONAL GUIDELINES FOR GRADING AND THE EROSION AND SEDIMENT CONTROL MEASURES SHOWN OR STATED ON THESE PLANS. 2. CONTRACTOR MUST ENSURE THAT THE CONSTRUCTION SITE IS PREPARED PRIOR TO THE ONSET OF ANY STORM. CONTRACTOR SHALL HAVE ALL EROSION AND SEDIMENT CONTROL MEASURES IN PLACE FOR THE WINTER MONTHS PRIOR TO OCTOBER 1. 3. ALL EROSION AND SEDIMENT CONTROL MEASURES SHALL BE MAINTAINED UNTIL DISTURBED AREAS ARE STABILIZED. CHANGES TO THIS EROSION AND SEDIMENT CONTROL PLAN SHALL BE MADE TO MEET FIELD CONDITIONS ONLY WITH THE APPROVAL OF OR AT THE DIRECTION OF A REPRESENTATIVE OF THE DEPARTMENT OF UTILITIES. 4. THIS PLAN MAY NOT COVER ALL THE SITUATION THAT ARISE DURING CONSTRUCTION DUE TO UNANTICIPATED FIELD CONDITIONS. VARIATIONS MAY BE MADE TO THE PLAN IN THE FIELD SUBJECT TO THE APPROVAL OF OR AT THE DIRECTION OF A REPRESENTATIVE OF THE DEPARTMENT OF UTILITIES. 5. ALL EROSION AND SEDIMENT CONTROL MEASURES SHALL BE CHECKED BEFORE AND AFTER ALL STORMS TO ENSURE MEASURES ARE FUNCTIONING PROPERLY. 6. CONTRACTOR SHALL MAINTAIN A LOG AT THE SITE OF ALL INSPECTIONS OR MAINTENANCE OF BMPS AS WELL AS, ANY CORRECTIVE CHANGES TO THE BMPS OR EROSION AND SEDIMENT CONTROL PLAN. 7. IN AREAS WHERE SOIL WILL BE EXPOSED LONGER THAN 14 DAYS, CONTRACTOR SHALL STABILIZE EXPOSED SOILS WITH HYDROSEEDING OR OTHER EQUIVALENT METHOD. CONTRACTOR SHALL ENSURE NO AREAS WILL BE LEFT EXPOSED OVER THE WINTER SEASON. 8. THE CONTRACTOR SHALL INSTALL THE STABILIZED CONSTRUCTION ENTRANCE PRIOR TO COMMENCEMENT OF GRADING PERIOD LOCATION OF THE ENTRANCE MAY BE ADJUSTED BY THE CONTRACTOR TO FACILITATE GRADING OPERATIONS. ALL CONSTRUCTION TRAFFIC ENTERING THE PAVED ROAD MUST CROSS THE STABILIZED CONSTRUCTION ENTRANCE. THE STABILIZED CONSTRUCTION ENTRANCE SHALL REMAIN IN PLACE UNTIL THE ROAD BASE ROCK COURSE IS COMPLETED. 9. ALL SEDIMENT DEPOSITED ON PAVE ROADWAYS SHALL BE SWEPT AT THE END OF EACH WORKING DAY OR AS NECESSARY. 10. CONTRACTOR SHALL PLAY GRAVEL BAG BARRIERS AROUND ALL NEW DRAINAGE STRUCTURE OPENINGS IMMEDIATELY AFTER THE STRUCTURE OPENING IS CONSTRUCTED. THESE GRAVEL BAG BARRIER SHALL BE MAINTAINED AND REMAIN IN PLACE UNTIL CONSTRUCTION IS COMPLETED. 11. SOIL STOCK PILE SHALL BE SURROUNDED BY STRAW WATTLE. CONTRACTOR SHALL COVER STOCKPILE WHEN NOT IN USE. 12. CONTRACTOR SHALL IMPLEMENT HOUSEKEEPING PRACTICES AS FOLLOWS: A. SOLID WASTE MANAGEMENT: PROVIDE DESIGNATED WASTE COLLECTION AREAS AND CONTAINERS. ARRANGE FOR REGULAR REMOVAL AND DISPOSAL. CLEAR SITE OF TRASH INCLUDING ORGANIC DEBRIS, PACKAGING MATERIAL, SCRAP OR SURPLUS BUILDING MATERIAL AND DOMESTIC WASTE DAILY. B. MATERIAL DELIVERY AND STORAGE: PROVIDE A DESIGNATED MATERIAL STORAGE AREA WITH SECONDARY CONTAINMENT SUCH AS BERMING. STORE MATERIAL ON PALLETS AND PROVIDE COVERING FOR SOLUBLE MATERIALS. RELOCATE STORAGE AREA INTO BUILDING SHELL WHEN POSSIBLE. INSPECT AREA WEEKLY. C. CONCRETE WASTE: PROVIDE A DESIGNATED AREA FOR A TEMPORARY PIN TO BE USED FOR CONCRETE TRUCK WASH OUT. DISPOSE OF HARDEN CONCRETE OFFSITE. AT NO TIME SHALL A CONCRETE TRUCK DUMP ITS WASTE AND CLEAN ITS TRUCK INTO THE CITY STORM DRAINS VIA CURB AND GUTTER. INSPECT DAILY TO CONTROL RUNOFF, AND WEEKLY FOR REMOVAL OF HEARTED CONCRETE. D. PAINT AND PAINTING SUPPLIES: PROVIDE INSTRUCTION TO EMPLOYEES AND SUBCONTRACTORS REGARDING REDUCTION OF POLLUTANTS INCLUDING MATERIAL STORAGE, USED, AND CLEAN UP. INSPECT SITE WEEKLY FOR EVIDENCE OF IMPROPER DISPOSAL. E. VEHICLE FUELING, MAINTENANCE AND CLEANING: PROVIDE A DESIGNATED FUELING AREA WITH SECONDARY CONTAINMENT SUCH AS BERMING. DO NOT ALLOW MOBILE FUELING OF EQUIPMENT. PROVIDE EQUIPMENT WITH DRIP PANS. RESTRICT ON-SITE MAINTENANCE AND CLEANING OF EQUIPMENT TO A MINIMUM. INSPECT AREA WEEKLY. F. HAZARDOUS WASTE MANAGEMENT: PREVENT THE DISCHARGE OF POLLUTANTS FROM HAZARDOUS WASTE TO THE DRAINAGE SYSTEM THROUGH PROPER MATERIAL USE, WASTE DISPOSAL AND TRAINING OF EMPLOYEES. HAZARDOUS WASTE PRODUCTS COMMONLY FOUND ON SITE INCLUDE BUT ARE NOT LIMITED TO PAINTS AND SOLVENTS, PETROLEUM PRODUCTS, FERTILIZERS, HERBICIDE AND PESTICIDES, SOIL STABILIZATION PRODUCTS, ASPHALT PRODUCTS AND CONCRETE CURING PRODUCTS. 13. THE FOLLOWING SOIL WIND EROSION CONTROL (DUST CONTROL) METHODS ARE PROPOSED AS PART OF THESE IMPROVEMENT PLANS: A. WATER THE SOIL OF THE SITE AND THE ADJACENT STREETS BEING USED IN CONNECTION WITH SOIL DISTURBANCE OPERATIONS ON THE SITE IN ACCORDANCE WITH CALTRANS STANDARDS. B. COVER EXPOSED SOIL WITH GRAVEL OR ROCK LANDSCAPING. C. COVER EXPOSED SOIL WITH ORGANIC MULCHES, SPRINKLER IRRIGATED. D. IRRIGATE GRASSES. E. MAINTAIN LANDSCAPE VEGETATION Z 31.35 E 1254757.163 N 627601.52 35 <35.5> <36.0> <36.0> <34.25> <34.75> <34.0> <34.5> 6" <34.75> <36.0> EXIST TOPO PROPOSED GRADE <33.0> 4% <32.50> <31.9> 6" <33.73> <33.73> SW <32.0> 32 31 30 <29.5> <29.0> <30.5> 6" 6" SW <30.4> <29.9> <30.0> <30> 1% <30> 29 28 LP 28.5 33 34 36 SUMP <20.0> STORM TECH MC-3500 CHAMBER SYSTEM 72'-6"x33'-0" [SEE DETAILS - C 1.07] GRAVEL OPEN GRAVEL PAVEMENT 4" PAVEMENT 6" PAVEMENT 4" PAVEMENT GRAVEL GRADING & PAVING SITE PLAN SCALE: 1" = 10' 1 C 1.02 8"Ø CURB CURB CURB CURB CONC CURB GRAVEL UNDISTURBED / LAWN LAWN 6" PAVEMENT 34 33 32 CB TRENCH DRAIN TRENCH DRAIN CONCRETE STEPS <32.5> <33.00> SW <31.50> CB <33.50> CONCRETE SIDEWALK @±32.0 CURB HEIGHT DECREASES FROM 6" TO 0" IN THIS SECTION <30.25> <30.0> <31.0> <32.0> <31.0> <29.0> EQUIMPMENT PAD(S) ±6" ABOVE GRADE F.F. OF LABS = 34.25 <31.0> 40.5' LONG 2.25' DROP 5.6% SLOPE <33.0> EQUIPMENT PAD(S) ±6" ABOVE GRADE 56.0' LONG 2.0' DROP 3.6% SLOPE <32.0> <33.0> <33.0> <34.0> <34.0> <34.0> <35.0> <35.0> 41.5' LONG 2.0' DROP 4.8% SLOPE 12"Ø STORM WATER CB 8"Ø STORM WATER LP 6"Ø OVERFLOW TO STREET CONC CURB CONC CURB CONC CURB 8"Ø CB 8"Ø STORM WATER 8"Ø STORM WATER 35 Z 31.35 E 1254757.163 N 627601.52 35 <35.5> <36.0> <36.0> <35.75> <36.25> <35.0> <35.5> 6" <34.75> <36.0> EXIST TOPO PROPOSED GRADE <33.0> 4% <32.4> <31.9> SW 6" BUILDINGS <33.73> <33.73> SW <32.0> 32 <31.5> 31 30 <29.5> <29.0> <29.5> 6" 6" SW <30.4> <29.9> <30.0> <30> 1% <30> 29 28 STORM DRAINAGE CB LP 28.5 33 34 7% 36 6"Ø OVERFLOW TO GUTTER SUMP <20.0> 24"Ø w/ STANDARD AASHTO H-20 COVER STORM TECH MC-3500 CHAMBER SYSTEM 72'-6"x33'-0" PAD PAD PAD PAD PAD PAD 4" PVMT 4" PVMT GENERAL SITE PLAN SCALE: 1" = 10' 1 C 1.03 [SEE DETAILS - C 1.07] EXIST RELOCATED LAB ON NEW FND (SEE A201) NEW LAB (SEE A201) NEW FOUNDATION PLAN 1 C 1.04 12x12 (TYP.) CF20 CF40 2'x2' PIER (TYP.) CF20 CF40 CF40 CF40 NEW BRIDGE UPPER LANDING SCALE: 1/2" = 1'-0" 4 C 1.04 NEW BRIDGE LOWER LANDING SCALE: 1/2" = 1'-0" 5 C 1.04 NEW ROOF FRAMING PLAN SCALE: 1/2" = 1'-0" 3 C 1.04 NEW FOUNDATION PLAN SCALE: 1/8" = 1'-0" 2 C 1.04 2 C 1.05 (TYP.) 1 C 1.05 1 C 1.05 1 C 1.05 1 C 1.05 SCALE: 1/8" = 1'-0" EMS FOUNDATION PLAN SCALE: 1/8" = 1'-0" 6 C 1.04 EMS FOUNDATION PLAN SCALE: 1/8" = 1'-0" 7 C 1.04 EMS FOUNDATION PLAN SCALE: 1/8" = 1'-0" 8 C 1.04 10 C 1.05 10 C 1.05 10 C 1.05 10 C 1.05 10 C 1.05 7 C 1.04 8 C 1.04 CF20 CF20 CF20 CF20 CF20 CF20 A B C F E D 67'-0" 39'-0" CF20 CF20 CF20 CF20 CF20 CF20 30" 10'-0" 31'-0" 36'-0" D E F A B C EQ SPACES TO AVOID TIRES EQ SPACES TO AVOID TIRES 16x16 11'-8" 13'-8" 13'-8" CF20 DOWEL ZONE BETWEEN TIRES: USE (6)#5 DOWELS A F E B D C 1) CONSTRUCT CF20 2) DRIVE TRAILER w/ STRUT INSTALLED IN PLACE 3) CAST 16x16 PIER TRAILER CHASSIS 5'-0" MAX 5'-0" MAX 5'-0" MAX 5'-0" MAX 5'-0" MAX 5'-0" MAX 5'-0" MAX 5'-0" MAX 10 C 1.05 EQ EQ EQ EQ CF28 CF28 CF28 CF28 3 C 1.05 CF28 CF28 CF28 3 C 1.05 C3x5 C3x5 C3x5 C3x5 C3x5 C3x5 C3x5 C3x5 C3x5 C6x10.5 C6x10.5 C6x10.5 C6x10.5 2'-0" MAX 24GA MTC ROOFING 10x10 BASEPLATE + SPLICEPLATE AT TOP 10x10 BASEPLATE + SPLICEPLATE AT TOP 10x10 BASEPLATE + SPLICEPLATE AT TOP 10x10 BASEPLATE + SPLICEPLATE AT TOP 10x10 BASEPLATE + SPLICEPLATE AT TOP 6x6 BASEPLATE + SPLICEPLATE AT TOP 6x6 BASEPLATE + SPLICEPLATE AT TOP CF40 DETAIL SCALE: 3/4" = 1'-0" 1 4'-0" * 1'-4" 3" CLR (7)#7's CONT. TOP & BOTT. #7's @12" o/c TOP & BOTT. CONTAINER UNIT GRADE 1'-10" MAX VARIES 7" 2'-0" x 2'-0" CONC. PIER w/ (8)#6's V & 3 TIES@8" DATUM EL. CHAMFER ALL EXPOSED EDGES (TYP.) CF20 DETAIL SCALE: 3/4" = 1'-0" 2 2'-0" * 1'-0" (4)#5 #5@8" B.⅊ 34"x10"x10" w/ (4)34"Ø A. BOLTS ON A 14" LEV.⅊ OVER 1 12" NON-SHRINK GROUT RE-USE EXIST DECK SUPPORT SYSTEM GRADE VARIES 2'-4" DATUM EL. HSS 4x4 COLUMN 12"x12" CONC. PIER w/(4) #4's VERT. & 3 TIES@3" TRAILER FRAME #5@8"V #4@8"H #5@8" (5)#5 2'-8" CF28 * 5x3x38 w/ 2)58"Ø A. BOLTS @ EA FRAME AUX LAB TRAILER FND SCALE: 3/4" = 1'-0" 3 8" 1'-0" MIN. 4" SOG (3)#5 16" * 4" COMP. SAND BASE 8" #5@8"EW #5 @8" EQUIPMENT PAD SCALE: 3/4" = 1'-0" 4 4" COMP. SAND BASE 6" PVMT 4" PVMT 4" COMP. SAND BASE 6" 6" 8" (2)#4 (2)#4 #4@8" #4@10"EW #4@12"EW JTS@10'-0" o/c SUB BASE - EXCAVATE AS REQ'D & B'FILL WITH GRAVEL (No.67 CRUSHED BASALT MIX OR EQ) B'FILL COMPACT TO 95% MONITORED PROCTOR PROOF ROLL SUB BASE - USING 15 TON VIBRATING COMPACTOR - 20 PASSES EACH DIRECTION & REPAIR SUB BASE USING 3" MINUS STONE COMPACTED UNTIL REFUSAL SIDEWALKS SCALE: 3/4" = 1'-0" 5 PARKING / CURB SCALE: 3/4" = 1'-0" 6 C 1.05 * FIRM UNDISTURBED SUBGRADE MIN 2TSF BEARING CAPACITY, V.I.F. ROOF DETAIL SCALE: 1 1/2" = 1'-0" 7 HSS 4x4x3/8 DETAIL 8 ROOF DETAIL 9 C 1.05 C 1.05 C 1.05 C 1.05 C 1.05 C 1.05 C 1.05 C 1.05 24GA CORRUGATED ROOFING C3x5@24" ROOF C6x10.5 SPLICE ⅊ 14" SPLICE 2x2x38 HSS 4x4x38 12"Ø - PLUG WELD @4" o/c NEW W8x18 EXIST W8x18 EXIST HSS 4x4x38 NEW HSS 4x4x38 (4) 2x2x38x3' SPLICE NEW TO EXIST TYP EA END SCALE: 1 1/2" = 1'-0" SCALE: 1 1/2" = 1'-0" A 1'-0" NEW-EXIST CONNECTION CF20 @EMS DETAIL SCALE: 3/4" = 1'-0" 10 C 1.05 2'-0" 3" CL. * 12" 6" 16x16 MIN. NEW STRUT: USE L 3x3x38 OR EQ. TRAILER CHASSIS MAX 8" (4)#5 DOWELS #4@8"V (3)#4H (4)#5 #5@8" FLASHING 3" (2)34"Ø A325 BOLTS MIN. 4" SELF TAPPING ROOFING SCREWS - #12@6" o/c 6" 6" 6" 8" No. 67 CRUSHED BASALT MIX (2)#4 #4@8" 8" MIN. SUB BASE SEE DETAIL 6/C1.05 4" SIDEWALK (2)#4 GRAVEL PARKING DETAIL SCALE: 3/4" = 1'-0" 11 C 1.05 1'-6" SQ. x 6" THICK 6" SCREENED GRAVEL (PAVEMENT) FINISHED GRADE 2.1x2.1 WWF. CONCRETE PAD WITH 11"+ (2"0) 18"+ (6"0) 30"+ (12"0) (MIN.) 6" MAY BE REQUIRED TO INSTALL ADDITIONAL DEPRESSION OF VALVE BURIED GATE VALVE AND BOX LOWER SECTION AS SPECIFIED. GATE VALVE SIZE AND ENDS TYPE CAST IRON VALVE BOX 3'-0" (MIN.) UPPER SECTION TELESCOPING FINISHED GRADE (GROUND) CAST IRON LID MARKED "WATER" AND 3" ABOVE GRADE ELSEWHERE GRADE IN PAVEMENT OR SHOULDER CONCRETE PAD 1/2" ABOVE SET COVER OF VALVE BOX AND NTS CONC. BLOCK OR BRICK RESTRAINERS DIA./4 CONC. BLOCK OR BRICK DOUBLE NUT (TYP.) ANCHOR BOLTS (SEE DETAIL) HOT DIPPED GALVANIZED ANCHOR BOLTS STAINLESS STEEL STRAP NTS 18" MIN.-10" & SMALLER PIPE * 24" MIN.-12" & LARGER PIPE 45° 1/4" PLYWOOD A C A 9" TAPPING SLEEVE DETAIL (PLAN) 1. AT ALL 90° - 45° USE TRUST BLOCK AND RESTRAINERS NOTE: NTS CONCRETE THRUST BLOCK EXISTING WATER MAIN TAPPING VALVE NEW WATER PIPE WITH VALVE BOX TAPPING SLEEVE UNDISTURBED EARTH FOR TRENCH (STORM OR SANITARY) PIPE DIA 1'6 MAX 6" MIN 6" MIN 6" MIN 4 9" MIN, 2'0 MAX LIMITED BY VERT CLR BTWN PIPES 1 SEWER WATER WATER 3000 PSI CONC. CLASS "B" BEDDING AS SPECIFIED SEWER OD 9" MIN, 2'0 MAX 6" MIN 1'0 MIN 12" UNPAVED AREAS SELECT FILL (COMPACTION AS SPECIFIED), CONCRETE OR ASPHALT 2'-0"+ PIPE O.D. 6" PIPE O.D. 16" PAVED AREAS 3'-0" MIN. DETECTION & IDENTIFICATION 12" 6" TAPE 12" 12" PIPE O.D. SCREENED SAND SELECT BACKFILL THROROUGHLY COMPACTED GEOTEXTILE FILTER FABRIC CONCRETE ENCASEMENT RESTRAINERS 22 1/2° BEND, TYP. z TYP. 48" NOTE: MAINTAIN 18-INCH SEPARATION SEWER PIPE WATER MAIN 24" (MIN) FINISHED GRADE z 1. WRAP ALL METAL FITTINGS W/ A VAPOR BARRIER PLASTIC THAT WILL BE ENCASED IN CONCRETE. TRENCH WIDTH 1'-03 8" 1'-03 8" 5'-6" - Remove & Replace Sod Existing Landscaping to Remain Cut Existing Grass with Blade Edger 4" New Topsoil 3" 3" 16 1/2" 8 1/4" 3'-0" Existing Stamped Conc. Pvmt. 6" Min. Compacted 34" Stone #5 Dowels @ 12" o/c Epoxy Grouted Remove Existing Stamped Conc. Pvmt. #5 @ 8" E.W. Install new (min.) 6" Conc. Pvmt. Red Dye & Stamp Pattern to Match TRENCH WIDTH 6" 11" Match Existing 6" Min. Stone Base (4) #5 #5 L @ 8" 16 1/2" Exist. Pvmt. to Remain Exist. Pvmt. to Remain 12" Sawcut #4 @ 12" (2) #5 #5 @ 8" H 16 1/2" 6" Steel Pipe Sleeve 4"Ø for 2" HDPE 6"Ø for 4" HDPE #4 Dowels @ 12" o/c New Concrete Pavement Min. 8" Deep, Colored to Match Existing w/ Matching Surface Pattern Sawcut Exist. Pavement (3) #5 #4 @ 6" HDPE Pipe (see plan for size) 10" for 6" HDPE 8" for 4" HDPE 6" for 2" HDPE 1'-0" Trench 1'-0" Steel Pipe - Sch. 40 Comp. Sand B'fill (2) #5 #4 @ 6" 24" Min. Match Curb Foam Pipe Gasket 4" Min. Top Course Asphalt Road to Meet P.W.D. Specifications 4" Min. Base Course Stl. Plate for Traffic Compacted 34" Stone 3'-0" 4'-0" 8" 12" 8" 12" 8" Compacted Sand Base (2) 6"Ø Stl. Pipe Sleeve Sch. 40 New 2"Ø HDPE Water Line New 6" HDPE Water Line 3" PVC Water Line 3" PVC Water Line New 6" Valve New HDPE to PVC Tee Connection Typical Section Thru Manhole Precast Base With Monolithically Cast Floor 12" Thk. 48" Precast Riser Lengths Base Section 5" Wall (48") Foundation (12" Min. Thk.) Precast Concrete Grade Rings 24" Stone Cushion 5 1/2" Wall (54") (Per ASTM C478) Reinforcement Steps @12" o/c Eccentric Cone Eccentric Cone Precast Precast 8" 8" * FIRM UNDISTURBED SUBGRADE MIN 2TSF BEARING CAPACITY, V.I.F. * #4@8"EW SLOPE CONCRETE FILL C.I. MANHOLE FORM & LID COMPACT GROWLER B'FILL LIMITS OF EXCAVATION PER OSHA USE: CATCH BASIN NEENAH 2571-A 22"Ø CONCAVE GRATE SEWER LID: NEENAH 1077-23"Ø SAN SEWER OR STORM WATER 10" 2'-0" 8" 8" 8" 8" 8" 12" MIN 16" MAX NEENAH FRAME 4999-BX 1 1 #4@8" EW (3)#5 6" PVMT SEAT 2x2x14 w/ 38"Øx3" HEADED STUD @12" o/c TRENCH DRAIN DETAIL SCALE: 3/4" = 1'-0" 15 C 1.06 TRENCH DRAIN 6" PVMT 8" SW 16" 8" 12" #5@8" EW #5 DOWEL @12" o/c EPOXY GROUTED #4 @8" (3)#5 1" SAW CUT NEW DRIVEWAY EXIST STREET PVMT DRIVEWAY SECTION @CURB CUT SCALE: 3/4" = 1'-0" 16 C 1.06 PROJECT INFORMATION ENGINEERED PRODUCT MANAGER ADS SALES REP PROJECT NO. Advanced Drainage Systems, Inc. GERMFREE COPY ST CROIX, FL MC-3500 STORMTECH CHAMBER SPECIFICATIONS 1. CHAMBERS SHALL BE STORMTECH MC-3500. 2. CHAMBERS SHALL BE ARCH-SHAPED AND SHALL BE MANUFACTURED FROM VIRGIN, IMPACT-MODIFIED POLYPROPYLENE COPOLYMERS. 3. CHAMBERS SHALL MEET THE REQUIREMENTS OF ASTM F2418, "STANDARD SPECIFICATION FOR POLYPROPYLENE (PP) CORRUGATED WALL STORMWATER COLLECTION CHAMBERS" CHAMBER CLASSIFICATION 45x76 DESIGNATION SS. 4. CHAMBER ROWS SHALL PROVIDE CONTINUOUS, UNOBSTRUCTED INTERNAL SPACE WITH NO INTERNAL SUPPORTS THAT WOULD IMPEDE FLOW OR LIMIT ACCESS FOR INSPECTION. 5. THE STRUCTURAL DESIGN OF THE CHAMBERS, THE STRUCTURAL BACKFILL, AND THE INSTALLATION REQUIREMENTS SHALL ENSURE THAT THE LOAD FACTORS SPECIFIED IN THE AASHTO LRFD BRIDGE DESIGN SPECIFICATIONS, SECTION 12.12, ARE MET FOR: 1) LONG-DURATION DEAD LOADS AND 2) SHORT-DURATION LIVE LOADS, BASED ON THE AASHTO DESIGN TRUCK WITH CONSIDERATION FOR IMPACT AND MULTIPLE VEHICLE PRESENCES. 6. CHAMBERS SHALL BE DESIGNED, TESTED AND ALLOWABLE LOAD CONFIGURATIONS DETERMINED IN ACCORDANCE WITH ASTM F2787, "STANDARD PRACTICE FOR STRUCTURAL DESIGN OF THERMOPLASTIC CORRUGATED WALL STORMWATER COLLECTION CHAMBERS". LOAD CONFIGURATIONS SHALL INCLUDE: 1) INSTANTANEOUS (<1 MIN) AASHTO DESIGN TRUCK LIVE LOAD ON MINIMUM COVER 2) MAXIMUM PERMANENT (75-YR) COVER LOAD AND 3) ALLOWABLE COVER WITH PARKED (1-WEEK) AASHTO DESIGN TRUCK. 7. REQUIREMENTS FOR HANDLING AND INSTALLATION: · TO MAINTAIN THE WIDTH OF CHAMBERS DURING SHIPPING AND HANDLING, CHAMBERS SHALL HAVE INTEGRAL, INTERLOCKING STACKING LUGS. · TO ENSURE A SECURE JOINT DURING INSTALLATION AND BACKFILL, THE HEIGHT OF THE CHAMBER JOINT SHALL NOT BE LESS THAN 3”. · TO ENSURE THE INTEGRITY OF THE ARCH SHAPE DURING INSTALLATION, a) THE ARCH STIFFNESS CONSTANT AS DEFINED IN SECTION 6.2.8 OF ASTM F2418 SHALL BE GREATER THAN OR EQUAL TO 450 LBS/IN/IN. AND b) TO RESIST CHAMBER DEFORMATION DURING INSTALLATION AT ELEVATED TEMPERATURES (ABOVE 73° F / 23° C), CHAMBERS SHALL BE PRODUCED FROM REFLECTIVE GOLD OR YELLOW COLORS. 8. ONLY CHAMBERS THAT ARE APPROVED BY THE SITE DESIGN ENGINEER WILL BE ALLOWED. UPON REQUEST BY THE SITE DESIGN ENGINEER OR OWNER, THE CHAMBER MANUFACTURER SHALL SUBMIT A STRUCTURAL EVALUATION FOR APPROVAL BEFORE DELIVERING CHAMBERS TO THE PROJECT SITE AS FOLLOWS: · THE STRUCTURAL EVALUATION SHALL BE SEALED BY A REGISTERED PROFESSIONAL ENGINEER. · THE STRUCTURAL EVALUATION SHALL DEMONSTRATE THAT THE SAFETY FACTORS ARE GREATER THAN OR EQUAL TO 1.95 FOR DEAD LOAD AND 1.75 FOR LIVE LOAD, THE MINIMUM REQUIRED BY ASTM F2787 AND BY SECTIONS 3 AND 12.12 OF THE AASHTO LRFD BRIDGE DESIGN SPECIFICATIONS FOR THERMOPLASTIC PIPE. · THE TEST DERIVED CREEP MODULUS AS SPECIFIED IN ASTM F2418 SHALL BE USED FOR PERMANENT DEAD LOAD DESIGN EXCEPT THAT IT SHALL BE THE 75-YEAR MODULUS USED FOR DESIGN. 9. CHAMBERS AND END CAPS SHALL BE PRODUCED AT AN ISO 9001 CERTIFIED MANUFACTURING FACILITY. IMPORTANT - NOTES FOR THE BIDDING AND INSTALLATION OF MC-3500 CHAMBER SYSTEM 1. STORMTECH MC-3500 CHAMBERS SHALL NOT BE INSTALLED UNTIL THE MANUFACTURER'S REPRESENTATIVE HAS COMPLETED A PRE-CONSTRUCTION MEETING WITH THE INSTALLERS. 2. STORMTECH MC-3500 CHAMBERS SHALL BE INSTALLED IN ACCORDANCE WITH THE "STORMTECH MC-3500/MC-4500 CONSTRUCTION GUIDE". 3. CHAMBERS ARE NOT TO BE BACKFILLED WITH A DOZER OR AN EXCAVATOR SITUATED OVER THE CHAMBERS. STORMTECH RECOMMENDS 3 BACKFILL METHODS: · STONESHOOTER LOCATED OFF THE CHAMBER BED. · BACKFILL AS ROWS ARE BUILT USING AN EXCAVATOR ON THE FOUNDATION STONE OR SUBGRADE. · BACKFILL FROM OUTSIDE THE EXCAVATION USING A LONG BOOM HOE OR EXCAVATOR. 4. THE FOUNDATION STONE SHALL BE LEVELED AND COMPACTED PRIOR TO PLACING CHAMBERS. 5. JOINTS BETWEEN CHAMBERS SHALL BE PROPERLY SEATED PRIOR TO PLACING STONE. 6. MAINTAIN MINIMUM - 6" (150 mm) SPACING BETWEEN THE CHAMBER ROWS. 7. INLET AND OUTLET MANIFOLDS MUST BE INSERTED A MINIMUM OF 12" (300 mm) INTO CHAMBER END CAPS. 8. EMBEDMENT STONE SURROUNDING CHAMBERS MUST BE A CLEAN, CRUSHED, ANGULAR STONE MEETING THE AASHTO M43 DESIGNATION OF #3 OR #4. 9. STONE MUST BE PLACED ON THE TOP CENTER OF THE CHAMBER TO ANCHOR THE CHAMBERS IN PLACE AND PRESERVE ROW SPACING. 10. THE CONTRACTOR MUST REPORT ANY DISCREPANCIES WITH CHAMBER FOUNDATION MATERIALS BEARING CAPACITIES TO THE SITE DESIGN ENGINEER. 11. ADS RECOMMENDS THE USE OF "FLEXSTORM CATCH IT" INSERTS DURING CONSTRUCTION FOR ALL INLETS TO PROTECT THE SUBSURFACE STORMWATER MANAGEMENT SYSTEM FROM CONSTRUCTION SITE RUNOFF. NOTES FOR CONSTRUCTION EQUIPMENT 1. STORMTECH MC-3500 CHAMBERS SHALL BE INSTALLED IN ACCORDANCE WITH THE "STORMTECH MC-3500/MC-4500 CONSTRUCTION GUIDE". 2. THE USE OF EQUIPMENT OVER MC-3500 CHAMBERS IS LIMITED: · NO EQUIPMENT IS ALLOWED ON BARE CHAMBERS. · NO RUBBER TIRED LOADER, DUMP TRUCK, OR EXCAVATORS ARE ALLOWED UNTIL PROPER FILL DEPTHS ARE REACHED IN ACCORDANCE WITH THE "STORMTECH MC-3500/MC-4500 CONSTRUCTION GUIDE". · WEIGHT LIMITS FOR CONSTRUCTION EQUIPMENT CAN BE FOUND IN THE "STORMTECH MC-3500/MC-4500 CONSTRUCTION GUIDE". 3. FULL 36" (900 mm) OF STABILIZED COVER MATERIALS OVER THE CHAMBERS IS REQUIRED FOR DUMP TRUCK TRAVEL OR DUMPING. USE OF A DOZER TO PUSH EMBEDMENT STONE BETWEEN THE ROWS OF CHAMBERS MAY CAUSE DAMAGE TO CHAMBERS AND IS NOT AN ACCEPTABLE BACKFILL METHOD. ANY CHAMBERS DAMAGED BY USING THE "DUMP AND PUSH" METHOD ARE NOT COVERED UNDER THE STORMTECH STANDARD WARRANTY. CONTACT STORMTECH AT 1-888-892-2694 WITH ANY QUESTIONS ON INSTALLATION REQUIREMENTS OR WEIGHT LIMITS FOR CONSTRUCTION EQUIPMENT. PROPOSED LAYOUT CONCEPTUAL ELEVATIONS 15 STORMTECH MC-3500 CHAMBERS 6 12 9 STORMTECH MC-3500 END CAPS STONE ABOVE (in) STONE BELOW (in) 40 STONE VOID 3331 INSTALLED SYSTEM VOLUME (CF) (PERIMETER STONE INCLUDED) (COVER STONE INCLUDED) (BASE STONE INCLUDED) 1040 SYSTEM AREA (SF) 136.7 SYSTEM PERIMETER (ft) MAXIMUM ALLOWABLE GRADE (TOP OF PAVEMENT/UNPAVED): MINIMUM ALLOWABLE GRADE (UNPAVED WITH TRAFFIC): MINIMUM ALLOWABLE GRADE (UNPAVED NO TRAFFIC): MINIMUM ALLOWABLE GRADE (TOP OF RIGID CONCRETE PAVEMENT): MINIMUM ALLOWABLE GRADE (BASE OF FLEXIBLE PAVEMENT): TOP OF STONE: TOP OF MC-3500 CHAMBER: 12" x 12" TOP MANIFOLD INVERT: 24" ISOLATOR ROW PLUS INVERT: 12" BOTTOM CONNECTION INVERT: BOTTOM OF MC-3500 CHAMBER: UNDERDRAIN INVERT: BOTTOM OF STONE: 12.50 6.50 PART TYPE 6.00 PREFABRICATED END CAP 6.00 6.00 PREFABRICATED END CAP 5.50 PREFABRICATED END CAP 4.50 FLAMP 2.95 MANIFOLD 0.92 0.86 NYLOPLAST (INLET W/ ISO PLUS ROW) 0.75 NYLOPLAST (OUTLET) 0.00 UNDERDRAIN 0.00 ITEM ON LAYOUT A DESCRIPTION 24" BOTTOM CORED END CAP, PART#: MC3500IEPP24BC / TYP OF ALL 24" BOTTOM CONNECTIONS AND ISOLATOR PLUS ROWS B 12" TOP CORED END CAP, PART#: MC3500IEPP12T / TYP OF ALL 12" TOP CONNECTIONS E 12" x 12" TOP MANIFOLD, ADS N-12 30" DIAMETER (24.00" SUMP MIN) F G 30" DIAMETER (DESIGN BY ENGINEER) H 6" ADS N-12 DUAL WALL PERFORATED HDPE UNDERDRAIN *INVERT ABOVE BASE OF CHAMBER INVERT* MAX FLOW 2.06" 26.40" C 12" BOTTOM CORED END CAP, PART#: MC3500IEPP12B / TYP OF ALL 12" BOTTOM CONNECTIONS 1.35" D INSTALL FLAMP ON 24" ACCESS PIPE / PART#: MC350024RAMP 26.36" 5.0 CFS IN 2.0 CFS OUT ISOLATOR ROW PLUS (SEE DETAIL) PLACE MINIMUM 17.50' OF ADSPLUS175 WOVEN GEOTEXTILE OVER BEDDING STONE AND UNDERNEATH CHAMBER FEET FOR SCOUR PROTECTION AT ALL CHAMBER INLET ROWS BED LIMITS NOTES • • • MANIFOLD SIZE TO BE DETERMINED BY SITE DESIGN ENGINEER. SEE TECH NOTE #6.32 FOR MANIFOLD SIZING GUIDANCE. DUE TO THE ADAPTATION OF THIS CHAMBER SYSTEM TO SPECIFIC SITE AND DESIGN CONSTRAINTS, IT MAY BE NECESSARY TO CUT AND COUPLE ADDITIONAL PIPE TO STANDARD MANIFOLD COMPONENTS IN THE FIELD. • THE SITE DESIGN ENGINEER MUST REVIEW ELEVATIONS AND IF NECESSARY ADJUST GRADING TO ENSURE THE CHAMBER COVER REQUIREMENTS ARE MET. THIS CHAMBER SYSTEM WAS DESIGNED WITHOUT SITE-SPECIFIC INFORMATION ON SOIL CONDITIONS OR BEARING CAPACITY. THE SITE DESIGN ENGINEER IS RESPONSIBLE FOR DETERMINING THE SUITABILITY OF THE SOIL AND PROVIDING THE BEARING CAPACITY OF THE INSITU SOILS. THE BASE STONE DEPTH MAY BE INCREASED OR DECREASED ONCE THIS INFORMATION IS PROVIDED. • NOT FOR CONSTRUCTION: THIS LAYOUT IS FOR DIMENSIONAL PURPOSES ONLY TO PROVE CONCEPT & THE REQUIRED STORAGE VOLUME CAN BE ACHIEVED ON SITE. ACCEPTABLE FILL MATERIALS: STORMTECH MC-3500 CHAMBER SYSTEMS MATERIAL LOCATION D FINAL FILL: FILL MATERIAL FOR LAYER 'D' STARTS FROM THE TOP OF THE 'C' LAYER TO THE BOTTOM OF FLEXIBLE PAVEMENT OR UNPAVED FINISHED GRADE ABOVE. NOTE THAT PAVEMENT SUBBASE MAY BE PART OF THE 'D' LAYER C INITIAL FILL: FILL MATERIAL FOR LAYER 'C' STARTS FROM THE TOP OF THE EMBEDMENT STONE ('B' LAYER) TO 24" (600 mm) ABOVE THE TOP OF THE CHAMBER. NOTE THAT PAVEMENT SUBBASE MAY BE A PART OF THE 'C' LAYER. B A EMBEDMENT STONE: FILL SURROUNDING THE CHAMBERS FROM THE FOUNDATION STONE ('A' LAYER) TO THE 'C' LAYER ABOVE. FOUNDATION STONE: FILL BELOW CHAMBERS FROM THE SUBGRADE UP TO THE FOOT (BOTTOM) OF THE CHAMBER. DESCRIPTION ANY SOIL/ROCK MATERIALS, NATIVE SOILS, OR PER ENGINEER'S PLANS. CHECK PLANS FOR PAVEMENT SUBGRADE REQUIREMENTS. GRANULAR WELL-GRADED SOIL/AGGREGATE MIXTURES, <35% FINES OR PROCESSED AGGREGATE. MOST PAVEMENT SUBBASE MATERIALS CAN BE USED IN LIEU OF THIS LAYER. CLEAN, CRUSHED, ANGULAR STONE CLEAN, CRUSHED, ANGULAR STONE AASHTO MATERIAL CLASSIFICATIONS N/A AASHTO M145¹ A-1, A-2-4, A-3 OR AASHTO M43¹ 3, 357, 4, 467, 5, 56, 57, 6, 67, 68, 7, 78, 8, 89, 9, 10 AASHTO M43¹ 3, 4 AASHTO M43¹ 3, 4 NO COMPACTION REQUIRED. PLATE COMPACT OR ROLL TO ACHIEVE A FLAT SURFACE.2,3 PLEASE NOTE: 1. THE LISTED AASHTO DESIGNATIONS ARE FOR GRADATIONS ONLY. THE STONE MUST ALSO BE CLEAN, CRUSHED, ANGULAR. FOR EXAMPLE, A SPECIFICATION FOR #4 STONE WOULD STATE: "CLEAN, CRUSHED, ANGULAR NO. 4 (AASHTO M43) STONE". 2. STORMTECH COMPACTION REQUIREMENTS ARE MET FOR 'A' LOCATION MATERIALS WHEN PLACED AND COMPACTED IN 9" (230 mm) (MAX) LIFTS USING TWO FULL COVERAGES WITH A VIBRATORY COMPACTOR. 3. WHERE INFILTRATION SURFACES MAY BE COMPROMISED BY COMPACTION, FOR STANDARD DESIGN LOAD CONDITIONS, A FLAT SURFACE MAY BE ACHIEVED BY RAKING OR DRAGGING WITHOUT COMPACTION EQUIPMENT. FOR SPECIAL LOAD DESIGNS, CONTACT STORMTECH FOR COMPACTION REQUIREMENTS. 4. ONCE LAYER 'C' IS PLACED, ANY SOIL/MATERIAL CAN BE PLACED IN LAYER 'D' UP TO THE FINISHED GRADE. MOST PAVEMENT SUBBASE SOILS CAN BE USED TO REPLACE THE MATERIAL REQUIREMENTS OF LAYER 'C' OR 'D' AT THE SITE DESIGN ENGINEER'S DISCRETION. COMPACTION / DENSITY REQUIREMENT PREPARE PER SITE DESIGN ENGINEER'S PLANS. PAVED INSTALLATIONS MAY HAVE STRINGENT MATERIAL AND PREPARATION REQUIREMENTS. BEGIN COMPACTIONS AFTER 24" (600 mm) OF MATERIAL OVER THE CHAMBERS IS REACHED. COMPACT ADDITIONAL LAYERS IN 12" (300 mm) MAX LIFTS TO A MIN. 95% PROCTOR DENSITY FOR WELL GRADED MATERIAL AND 95% RELATIVE DENSITY FOR PROCESSED AGGREGATE MATERIALS. ADS GEOSYNTHETICS 601T NON-WOVEN GEOTEXTILE ALL AROUND CLEAN, CRUSHED, ANGULAR STONE IN A & B LAYERS PAVEMENT LAYER (DESIGNED BY SITE DESIGN ENGINEER) PERIMETER STONE (SEE NOTE 4) EXCAVATION WALL (CAN BE SLOPED OR VERTICAL) 45" (1140 mm) D C B *TO BOTTOM OF FLEXIBLE PAVEMENT. FOR UNPAVED INSTALLATIONS WHERE RUTTING FROM VEHICLES MAY OCCUR, INCREASE COVER TO 24" (600 mm). 12" (300 mm) MIN 8' 18" (450 mm) MIN* (2.4 m) MAX A 6" (150 mm) MIN MC-3500 END CAP NOTES: 1. CHAMBERS SHALL MEET THE REQUIREMENTS OF ASTM F2418, "STANDARD SPECIFICATION FOR POLYPROPYLENE (PP) CORRUGATED WALL STORMWATER COLLECTION CHAMBERS" CHAMBER CLASSIFICATION 45x76 DESIGNATION SS. 2. MC-3500 CHAMBERS SHALL BE DESIGNED IN ACCORDANCE WITH ASTM F2787 "STANDARD PRACTICE FOR STRUCTURAL DESIGN OF THERMOPLASTIC CORRUGATED WALL STORMWATER COLLECTION CHAMBERS". 3. THE SITE DESIGN ENGINEER IS RESPONSIBLE FOR ASSESSING THE BEARING RESISTANCE (ALLOWABLE BEARING CAPACITY) OF THE SUBGRADE SOILS AND THE DEPTH OF FOUNDATION STONE WITH CONSIDERATION FOR THE RANGE OF EXPECTED SOIL MOISTURE CONDITIONS. 4. PERIMETER STONE MUST BE EXTENDED HORIZONTALLY TO THE EXCAVATION WALL FOR BOTH VERTICAL AND SLOPED EXCAVATION WALLS. 5. REQUIREMENTS FOR HANDLING AND INSTALLATION: · TO MAINTAIN THE WIDTH OF CHAMBERS DURING SHIPPING AND HANDLING, CHAMBERS SHALL HAVE INTEGRAL, INTERLOCKING STACKING LUGS. · TO ENSURE A SECURE JOINT DURING INSTALLATION AND BACKFILL, THE HEIGHT OF THE CHAMBER JOINT SHALL NOT BE LESS THAN 3”. · TO ENSURE THE INTEGRITY OF THE ARCH SHAPE DURING INSTALLATION, a) THE ARCH STIFFNESS CONSTANT AS DEFINED IN SECTION 6.2.8 OF ASTM F2418 SHALL BE GREATER THAN OR EQUAL TO 450 LBS/IN/IN. AND b) TO RESIST CHAMBER DEFORMATION DURING INSTALLATION AT ELEVATED TEMPERATURES (ABOVE 73° F / 23° C), CHAMBERS SHALL BE PRODUCED FROM REFLECTIVE GOLD OR YELLOW COLORS. SUBGRADE SOILS (SEE NOTE 3) DEPTH OF STONE TO BE DETERMINED BY SITE DESIGN ENGINEER 9" (230 mm) MIN 6" (150 mm) MIN 77" (1950 mm) 12" (300 mm) MIN INSTALL FLAMP ON 24" (600 mm) ACCESS PIPE PART #: MC350024RAMP OPTIONAL INSPECTION PORT COVER PIPE CONNECTION TO END CAP WITH ADS GEOSYNTHETICS 601T NON-WOVEN GEOTEXTILE STORMTECH HIGHLY RECOMMENDS FLEXSTORM INSERTS IN ANY UPSTREAM STRUCTURES WITH OPEN GRATES MC-3500 CHAMBER MC-3500 END CAP CATCH BASIN OR MANHOLE SUMP DEPTH TBD BY SITE DESIGN ENGINEER (24" [600 mm] MIN RECOMMENDED) 24" (600 mm) HDPE ACCESS PIPE REQUIRED USE FACTORY PRE-CORED END CAP PART #: MC3500IEPP24BC OR MC3500IEPP24BW MC-3500 ISOLATOR ROW PLUS DETAIL NTS ONE LAYER OF ADSPLUS175 WOVEN GEOTEXTILE BETWEEN FOUNDATION STONE AND CHAMBERS 8.25' (2.51 m) MIN WIDE CONTINUOUS FABRIC WITHOUT SEAMS INSPECTION & MAINTENANCE STEP 1) INSPECT ISOLATOR ROW PLUS FOR SEDIMENT A. INSPECTION PORTS (IF PRESENT) A.1. REMOVE/OPEN LID ON NYLOPLAST INLINE DRAIN A.2. REMOVE AND CLEAN FLEXSTORM FILTER IF INSTALLED A.3. USING A FLASHLIGHT AND STADIA ROD, MEASURE DEPTH OF SEDIMENT AND RECORD ON MAINTENANCE LOG A.4. LOWER A CAMERA INTO ISOLATOR ROW PLUS FOR VISUAL INSPECTION OF SEDIMENT LEVELS (OPTIONAL) A.5. IF SEDIMENT IS AT, OR ABOVE, 3" (80 mm) PROCEED TO STEP 2. IF NOT, PROCEED TO STEP 3. B. ALL ISOLATOR PLUS ROWS B.1. REMOVE COVER FROM STRUCTURE AT UPSTREAM END OF ISOLATOR ROW PLUS B.2. USING A FLASHLIGHT, INSPECT DOWN THE ISOLATOR ROW PLUS THROUGH OUTLET PIPE i) MIRRORS ON POLES OR CAMERAS MAY BE USED TO AVOID A CONFINED SPACE ENTRY ii) FOLLOW OSHA REGULATIONS FOR CONFINED SPACE ENTRY IF ENTERING MANHOLE B.3. IF SEDIMENT IS AT, OR ABOVE, 3" (80 mm) PROCEED TO STEP 2. IF NOT, PROCEED TO STEP 3. STEP 2) CLEAN OUT ISOLATOR ROW PLUS USING THE JETVAC PROCESS A. A FIXED CULVERT CLEANING NOZZLE WITH REAR FACING SPREAD OF 45" (1.1 m) OR MORE IS PREFERRED B. APPLY MULTIPLE PASSES OF JETVAC UNTIL BACKFLUSH WATER IS CLEAN C. VACUUM STRUCTURE SUMP AS REQUIRED STEP 3) REPLACE ALL COVERS, GRATES, FILTERS, AND LIDS; RECORD OBSERVATIONS AND ACTIONS. STEP 4) INSPECT AND CLEAN BASINS AND MANHOLES UPSTREAM OF THE STORMTECH SYSTEM. NOTES 1. INSPECT EVERY 6 MONTHS DURING THE FIRST YEAR OF OPERATION. ADJUST THE INSPECTION INTERVAL BASED ON PREVIOUS OBSERVATIONS OF SEDIMENT ACCUMULATION AND HIGH WATER ELEVATIONS. 2. CONDUCT JETTING AND VACTORING ANNUALLY OR WHEN INSPECTION SHOWS THAT MAINTENANCE IS NECESSARY. STORMTECH CHAMBERS UNDERDRAIN DETAIL NTS OUTLET MANIFOLD STORMTECH END CAP STORMTECH CHAMBER MC-3500 TECHNICAL SPECIFICATION NTS VALLEY STIFFENING RIB CREST STIFFENING RIB CREST WEB LOWER JOINT CORRUGATION FOUNDATION STONE BENEATH CHAMBERS FOOT ADS GEOSYNTHETICS 601T NON-WOVEN GEOTEXTILE SECTION A-A DUAL WALL PERFORATED HDPE UNDERDRAIN STORMTECH END CAP B A B FOUNDATION STONE BENEATH CHAMBERS 77.0" A ADS GEOSYNTHETICS 601T NON-WOVEN GEOTEXTILE NUMBER AND SIZE OF UNDERDRAINS PER SITE DESIGN ENGINEER 4" (100 mm) TYP FOR SC-310 & SC-160LP SYSTEMS 6" (150 mm) TYP FOR SC-740, DC-780, MC-3500 & MC-4500 SYSTEMS MC-SERIES END CAP INSERTION DETAIL NTS STORMTECH END CAP 12" (300 mm) MIN SEPARATION 12" (300 mm) MIN INSERTION SECTION B-B (1956 mm) NOMINAL CHAMBER SPECIFICATIONS SIZE (W X H X INSTALLED LENGTH) CHAMBER STORAGE MINIMUM INSTALLED STORAGE* WEIGHT NOMINAL END CAP SPECIFICATIONS SIZE (W X H X INSTALLED LENGTH) END CAP STORAGE MINIMUM INSTALLED STORAGE* WEIGHT 77.0" X 45.0" X 86.0" 109.9 CUBIC FEET 175.0 CUBIC FEET 134 lbs. 75.0" X 45.0" X 22.2" 14.9 CUBIC FEET 45.1 CUBIC FEET 49 lbs. 75.0" (1905 mm) (1956 mm X 1143 mm X 2184 mm) (3.11 m³) (4.96 m³) (60.8 kg) 25.7" (653 mm) (1905 mm X 1143 mm X 564 mm) (0.42 m³) (1.28 m³) (22.2 kg) *ASSUMES 12" (305 mm) STONE ABOVE, 9" (229 mm) STONE FOUNDATION, 6" SPACING BETWEEN CHAMBERS, 6" (152 mm) STONE PERIMETER IN FRONT OF END CAPS AND 40% STONE POROSITY STUBS AT BOTTOM OF END CAP FOR PART NUMBERS ENDING WITH "B" STUBS AT TOP OF END CAP FOR PART NUMBERS ENDING WITH "T" END CAPS WITH A WELDED CROWN PLATE END WITH "C" END CAPS WITH A PREFABRICATED WELDED STUB END WITH "W" PART # MANIFOLD HEADER MANIFOLD STUB MANIFOLD HEADER MANIFOLD STUB MC3500IEPP06T MC3500IEPP06B MC3500IEPP08T MC3500IEPP08B MC3500IEPP10T MC3500IEPP10B MC3500IEPP12T MC3500IEPP12B MC3500IEPP15T 12" (300 mm) MIN SEPARATION 12" (300 mm) MIN INSERTION NOTE: MANIFOLD STUB MUST BE LAID HORIZONTAL FOR A PROPER FIT IN END CAP OPENING. MC3500IEPP15B MC3500IEPP18TC MC3500IEPP18TW MC3500IEPP18BC MC3500IEPP18BW MC3500IEPP24TC MC3500IEPP24TW MC3500IEPP24BC MC3500IEPP24BW MC3500IEPP30BC STUB 6" (150 mm) 8" (200 mm) 10" (250 mm) 12" (300 mm) 15" (375 mm) 18" (450 mm) --- 14.48" (368 mm) 24" (600 mm) --- 30" (750 mm) NOTE: ALL DIMENSIONS ARE NOMINAL --- 2.06" (52 mm) 2.75" (70 mm) 1.77" (45 mm) --- B 33.21" (844 mm) --- 31.16" (791 mm) --- 29.04" (738 mm) --- 26.36" (670 mm) --- 23.39" (594 mm) --- 20.03" (509 mm) C --- 0.66" (17 mm) --- 0.81" (21 mm) --- 0.93" (24 mm) --- 1.35" (34 mm) --- 1.50" (38 mm) --- CUSTOM PRECORED INVERTS ARE AVAILABLE UPON REQUEST. INVENTORIED MANIFOLDS INCLUDE 12-24" (300-600 mm) SIZE ON SIZE AND 15-48" (375-1200 mm) ECCENTRIC MANIFOLDS. CUSTOM INVERT LOCATIONS ON THE MC-3500 END CAP CUT IN THE FIELD ARE NOT RECOMMENDED FOR PIPE SIZES GREATER THAN 10" (250 mm). THE INVERT LOCATION IN COLUMN 'B' ARE THE HIGHEST POSSIBLE FOR THE PIPE SIZE. C B 45.0" (1143 mm) 45.0" (1143 mm) 90.0" (2286 mm) ACTUAL LENGTH 22.2" (564 mm) INSTALLED 86.0" (2184 mm) INSTALLED UPPER JOINT CORRUGATION BUILD ROW IN THIS DIRECTION NYLOPLAST DRAIN BASIN NTS INTEGRATED DUCTILE IRON FRAME & GRATE/SOLID TO MATCH BASIN O.D. 18" (457 mm) MIN WIDTH AASHTO H-20 CONCRETE SLAB 8" (203 mm) MIN THICKNESS 12" (610 mm) MIN (FOR AASHTO H-20) INVERT ACCORDING TO PLANS/TAKE OFF TRAFFIC LOADS: CONCRETE DIMENSIONS ARE FOR GUIDELINE PUPOSES ONLY. ACTUAL CONCRETE SLAB MUST BE DESIGNED GIVING CONSIDERATION FOR LOCAL SOIL CONDITIONS, TRAFFIC LOADING & OTHER APPLICABLE DESIGN FACTORS ADAPTER ANGLES VARIABLE 0°- 360° ACCORDING TO PLANS VARIABLE SUMP DEPTH ACCORDING TO PLANS [6" (152 mm) MIN ON 8-24" (200-600 mm), 10" (254 mm) MIN ON 30" (750 mm)] VARIOUS TYPES OF INLET AND OUTLET ADAPTERS AVAILABLE: 4-30" (100-750 mm) FOR CORRUGATED HDPE WATERTIGHT JOINT (CORRUGATED HDPE SHOWN) A 4" (102 mm) MIN ON 8-24" (200-600 mm) 6" (152 mm) MIN ON 30" (750 mm) BACKFILL MATERIAL BELOW AND TO SIDES OF STRUCTURE SHALL BE ASTM D2321 CLASS I OR II CRUSHED STONE OR GRAVEL AND BE PLACED UNIFORMLY IN 12" (305 mm) LIFTS AND COMPACTED TO MIN OF 90% NOTES 1. 8-30" (200-750 mm) GRATES/SOLID COVERS SHALL BE DUCTILE IRON PER ASTM A536 GRADE 70-50-05 2. 12-30" (300-750 mm) FRAMES SHALL BE DUCTILE IRON PER ASTM A536 GRADE 70-50-05 3. DRAIN BASIN TO BE CUSTOM MANUFACTURED ACCORDING TO PLAN DETAILS 4. DRAINAGE CONNECTION STUB JOINT TIGHTNESS SHALL CONFORM TO ASTM D3212 FOR CORRUGATED HDPE (ADS & HANCOR DUAL WALL) & SDR 35 PVC 5. FOR COMPLETE DESIGN AND PRODUCT INFORMATION: WWW.NYLOPLAST-US.COM 6. TO ORDER CALL: 800-821-6710 A 8" (200 mm) 10" (250 mm) 12" (300 mm) 15" (375 mm) 18" (450 mm) 24" (600 mm) 30" (750 mm) PART # 2808AG 2810AG 2812AG 2815AG 2818AG 2824AG 2830AG GRATE/SOLID COVER OPTIONS PEDESTRIAN LIGHT DUTY PEDESTRIAN LIGHT DUTY PEDESTRIAN AASHTO H-10 PEDESTRIAN AASHTO H-10 PEDESTRIAN AASHTO H-10 PEDESTRIAN AASHTO H-10 PEDESTRIAN AASHTO H-20 STANDARD LIGHT DUTY STANDARD LIGHT DUTY STANDARD AASHTO H-20 STANDARD AASHTO H-20 STANDARD AASHTO H-20 STANDARD AASHTO H-20 STANDARD AASHTO H-20 SOLID LIGHT DUTY SOLID LIGHT DUTY SOLID AASHTO H-20 SOLID AASHTO H-20 SOLID AASHTO H-20 SOLID AASHTO H-20 SOLID AASHTO H-20 30'-0" 33'-0"± 72'-6"± 67'-3" G H C E B D A F REQ'D VOLUME: 6420 CF