Active Sub-Slab Depressurization (SSD) Sample Clauses

Active Sub-Slab Depressurization (SSD). A generalized illustration of an active SSD system is shown on Figure 10. An active SSD system typically consists of a blower and sub-slab air intake piping system. The SSD system is operated continuously to create a slight vacuum beneath the concrete floor slab of the building. The induced vacuum beneath the building floor slab overcomes the lower pressure that is sometimes found inside buildings. Therefore, when the SSD system is in operation, soil gases generally cannot flow from beneath the floor slab into the building. Rather, at the location of any cracks on the floor, indoor air will be drawn from inside the building into the lower pressure zone beneath the floor slab, thereby mitigating the vapor intrusion process. An SSD system requires installation of a vent intake pipe in one or more central or other appropriately selected location(s) in the baserock layer beneath a concrete floor slab. As an alternative, a geocomposite drainage mat or other liner with lateral permeability can be installed beneath the building and used as the means for withdrawing air from beneath the entire floor area. The vent pipe or drainage mat is connected to a blower to continuously create ventilation and a slight vacuum beneath the floor slab. The vacuum level created beneath the floor must be at a level sufficient to overcome the anticipated vacuum level inside the building (see design guidance documents listed in Section 5.1.3.1). The air and soil gases withdrawn from beneath a building during SSD operation are exhausted to the atmosphere. The emissions from the SSD systems will be treated to remove VOCs to the extent required by the Bay Area Air Quality Management District (“BAAQMD”) based on the estimated VOC emission rate for each system.4 4 For an SSD system at a nearby residential property on a former GTE site in Mountain View, California, treatment of SSD emissions was not required by BAAQMD due to low TCE emission rates relative to BAAQMD standards (U.S. EPA, 2004).
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Related to Active Sub-Slab Depressurization (SSD)

  • Reactive Power and Primary Frequency Response 9.6.1 Power Factor Design Criteria

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  • One-Way Interconnection Trunks 2.3.1 Where the Parties use One-Way Interconnection Trunks for the delivery of traffic from Onvoy to Frontier, Onvoy, at Xxxxx’s own expense, shall: 2.3.1.1 provide its own facilities for delivery of the traffic to the technically feasible Point(s) of Interconnection on Frontier’s network in a LATA; and/or 2.3.1.2 obtain transport for delivery of the traffic to the technically feasible Point(s) of Interconnection on Frontier’s network in a LATA (a) from a third party, or, (b) if Frontier offers such transport pursuant to a Frontier access Tariff, from Frontier. 2.3.2 For each Tandem or End Office One-Way Interconnection Trunk group for delivery of traffic from Onvoy to Frontier with a utilization level of less than sixty percent (60%) for final trunk groups and eighty-five percent (85%) for high usage trunk groups, unless the Parties agree otherwise, Onvoy will promptly submit ASRs to disconnect a sufficient number of Interconnection Trunks to attain a utilization level of approximately sixty percent (60%) for all final trunk groups and eighty-five percent (85%) for all high usage trunk groups. In the event Onvoy fails to submit an ASR to disconnect One-Way Interconnection Trunks as required by this Section, Frontier may disconnect the excess Interconnection Trunks or bill (and Onvoy shall pay) for the excess Interconnection Trunks at the rates set forth in the Pricing Attachment. 2.3.3 Where the Parties use One-Way Interconnection Trunks for the delivery of traffic from Frontier to Onvoy, Frontier, at Frontier’s own expense, shall provide its own facilities for delivery of the traffic to the technically feasible Point(s) of Interconnection on Frontier’s network in a LATA.

  • Underground Storage Tanks In accordance with the requirements of Section 3(g) of the D.C. Underground Storage Tank Management Act of 1990, as amended by the District of Columbia Underground Storage Tank Management Act of 1990 Amendment Act of 1992 (D.C. Code § 8-113.01, et seq.) (collectively, the “UST Act”) and the applicable D.C. Underground Storage Tank Regulations, 20 DCMR Chapter 56 (the “UST Regulations”), District hereby informs the Developer that it has no knowledge of the existence or removal during its ownership of the Property of any “underground storage tanks” (as defined in the UST Act). Information pertaining to underground storage tanks and underground storage tank removals of which the D.C. Government has received notification is on file with the District Department of the Environment, Underground Storage Tank Branch, 00 X Xxxxxx, X.X., Xxxxx Xxxxx, Xxxxxxxxxx, X.X., 00000, telephone (000) 000-0000. District’s knowledge for purposes of this Section shall mean and be limited to the actual knowledge of Xxxxxx Xxxxx, Property Acquisition and Disposition Division of the Department of Housing and Community Development, telephone no. (000) 000-0000. The foregoing is set forth pursuant to requirements contained in the UST Act and UST Regulations and does not constitute a representation or warranty by District.

  • Unbundled Sub-Loop Feeder 2.8.4.1 Unbundled Sub-Loop Feeder (USLF) provides connectivity between BellSouth's central office and cross-box (or other access point) that serves an end user location. 2.8.4.2 USLF utilized for voice traffic can be configured as 2-wire voice (USLF-2W/V) or 4-wire voice (USLF-4W/V). 2.8.4.3 USLF utilized for digital traffic can be configured as 2-wire ISDN (USLF-2W/I); 2-wire Copper (USLF-2W/C); 4-wire Copper (USLF-4W/C); 4-wire DS0 level loop (USLF-4W/D0); or 4-wire DS1 and ISDN (USLF-4W/DI). 2.8.4.4 USLF will provide access to both the equipment and the features in the BellSouth central office and BellSouth cross box necessary to provide a 2W or 4W communications pathway from the BellSouth central office to the BellSouth cross- box. This element will allow for the connection of Lightyear’s loop distribution elements onto BellSouth's feeder system.

  • Signaling Link Transport 9.2.1 Signaling Link Transport is a set of two or four dedicated 56 kbps transmission paths between Global Connection-designated Signaling Points of Interconnection that provide appropriate physical diversity.

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  • Two-Way Interconnection Trunks 2.4.1 Where the Parties have agreed to use Two-Way Interconnection Trunks for the exchange of traffic between Verizon and PCS, PCS shall order from Verizon, and Verizon shall provide, the Two-Way Interconnection Trunks and the Entrance Facility, on which such Trunks will ride, and transport and multiplexing, in accordance with the rates, terms and conditions set forth in this Agreement and Verizon’s applicable Tariffs. 2.4.2 Prior to ordering any Two-Way Interconnection Trunks from Verizon, PCS shall meet with Verizon to conduct a joint planning meeting (“Joint Planning Meeting”). At that Joint Planning Meeting, each Party shall provide to the other Party originating Centium Call Second (Hundred Call Second) information, and the Parties shall mutually agree on the appropriate initial number of Two-Way End Office and Tandem Interconnection Trunks and the interface specifications at the Point of Interconnection (POI). Where the Parties have agreed to convert existing One-Way Interconnection Trunks to Two-Way Interconnection Trunks, at the Joint Planning Meeting, the Parties shall also mutually agree on the conversion process and project intervals for conversion of such One-Way Interconnection Trunks to Two-Way Interconnection Trunks. 2.4.3 Two-Way Interconnection Trunks shall be from a Verizon End Office or Tandem to a mutually agreed upon POI. 2.4.4 On a semi-annual basis, PCS shall submit a good faith forecast to Verizon of the number of End Office and Tandem Two-Way Interconnection Trunks that PCS anticipates Verizon will need to provide during the ensuing two (2) year period to carry traffic from PCS to Verizon and from Verizon to PCS. PCS’s trunk forecasts shall conform to the Verizon CLEC trunk forecasting guidelines as in effect at that time. 2.4.5 The Parties shall meet (telephonically or in person) from time to time, as needed, to review data on End Office and Tandem Two-Way Interconnection Trunks to determine the need for new trunk groups and to plan any necessary changes in the number of Two-Way Interconnection Trunks. 2.4.6 Two-Way Interconnection Trunks shall have SS7 Common Channel Signaling. The Parties agree to utilize B8ZS and Extended Super Frame (ESF) DS1 facilities, where available. 2.4.7 With respect to End Office Two-Way Interconnection Trunks, both Parties shall use an economic Centium Call Second (Hundred Call Second) equal to five (5). 2.4.8 Two-Way Interconnection Trunk groups that connect to a Verizon access Tandem shall be engineered using a design blocking objective of Xxxx-Xxxxxxxxx B.005 during the average time consistent busy hour. Two-Way Interconnection Trunk groups that connect to a Verizon local Tandem shall be engineered using a design blocking objective of Xxxx-Xxxxxxxxx B.01 during the average time consistent busy hour. Verizon and PCS shall engineer Two-Way Interconnection Trunks using BOC Notes on the LEC Networks SR-TSV-002275. 2.4.9 The performance standard for final Two-Way Interconnection Trunk groups shall be that no such Interconnection Trunk group will exceed its design blocking objective (B.005 or B.01, as applicable) for three

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