Basic Assessment Report - SRK

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Basic Assessment ReportThe installation of Soil Vapour Sampling Points will require the placement of a permeablecoarse clean sand layer beneath the storage tanks for a vertical depth of approximately 0.5mto 1m in order to locate the vents in the 16mm diameter monitoring pipe over portion of thisdepth. If cement stabilisation is carried out within the compacted backfill beneath and aroundthe tanks the permeable coarse clean sand could be placed on and around the perimeter of thebasal concrete slab or alternatively beneath it and extending out for a metre beyond the slab;and• A ground-water monitoring plan is to be prepared by Sasol, prior to construction. The planshould include the above monitoring conditions and should provide a strategy for themanagement of any groundwater contamination detected, it should detail the frequency ofmonitoring as well as details of stock reconciliation’s;Forecourt Dispensing Area• Installation of pump islands in the forecourt area. The pumps are to be fitted with a SpillContainment Chamber;• Construction of a concrete bunded reinforced graded slab over the forecourt area, with positivefalls towards a centrally located catch-pit/sump. The slabs thickness and strength is to bedetermined by a qualified Engineer and as approved by the eThekwini Municipality;• The centrally located catch-pit/sump shall drain into a pollution containment chamber i.e. anapproved oil/water separator system. Once the wash water has passed through the system,the separated oil must be collected regularly (every three months, or as determined by ACSA)by an approved waste contractor and removed to an approved hazardous waste disposalfacility. The remaining effluent water is to discharge to the existing sewer system whichdischarges to the Southern wastewater treatment works;• Stormwater should be regularly tested before exiting the PFS and before entering the bulkstormwater lines, to ensure that the quality of stormwater out-flow from the PFS complies toGeneral Limit Values of the National Water Act (No. 36 of 1998) (NWA) as well as the SpecialLimit Values as specified in the Bulk Services Agreement. In this regard the PFS will berequired to install an approved monitoring system at an approved location, to be discussed withand approved by ACSA and the eThekwini Municipality; and• The forecourt shall be covered;Refuelling station• Filler point installation at the refuelling station;• Provision of overspill protection devices in the tank filling pipework to prevent tank overfillduring filling operations;• Construction of a concrete bunded/ dished reinforced graded slab over the filler points at therefuelling station. The slabs thickness and strength is to be determined by a qualified Engineerand as approved by the eThekwini Municipality The refuelling station will have positive fallstowards centrally located catch-pits;• These catch-pits will drain to an underground storm water pollution containment chamber. Anisolation valve will be provided downstream of this chamber. During all refueling events, theoperator is to close the isolation valve to ensure that should a major spillage occur, all fuel isthen contained within the chamber for later cleaning up operations. In all other circumstancesbesides refueling events, the isolation valve is to remain open to convey storm water (due tothe area being uncovered) to a Calcamite sand, oil and grease trap. Once the containmentchamber has been “cleaned” the valve downstream of the chamber is opened and any residualspillage on the apron or in the chamber will be piped with the runoff to the Calcamite sand, oiland grease trap located downstream of the isolation valve. The residual hydrocarbons will beseparated out from the clean water based on the principal of specific gravity in the Calcamitesand, oil, and grease trap. The outlet pipe of the trap is to connect to the nearest sewermanhole of the existing sewer system which discharges to the Southern wastewater treatmentworks. There must be regular maintenance and inspections in accordance with the OperationalEnvironmental Management Program (EMPr).Department of Agriculture,Environmental Affairs & RuralDevelopment, KwaZulu-NatalBasic Assessment Report 2010Version 2: August 2010Page 8 of 46
Basic Assessment ReportAll pipe-work to and from the chamber and trap is to consist of hydro-carbon resistant HPDEmaterial;• In the event of an incident all fuel will be contained within the spill containment tank for laterhazop cleaning. During normal operations the oil residue must be regularly (every threemonths, or as determined by ACSA) collected from the containment tank and the oil/wasterseparator by an approved waste contractor and removed to an approved hazardous wastedisposal facility;• Stormwater should be regularly tested before exiting the PFS and before entering the bulkstormwater lines, to ensure that the quality of stormwater out-flow from the PFS complies toGeneral Limit Values of the National Water Act (No. 36 of 1998) (NWA) as well as the SpecialLimit Values as specified in the Bulk Services Agreement. In this regard the PFS will berequired to install an approved monitoring system at an approved location, to be discussed withand approved by ACSA and the eThekwini Municipality; and• The refuelling station shall be uncovered;Vapour Recovery Systems• Stage 1 Volatile Organic Compound (VOC) Vapour Recovery Systems, as approved by ACSAshould be installed onto fuel dispensing nozzles at the refuelling and forecourt areas. The PFSOperator must ensure that every effort is made to limit gaseous emissions on their site and thatall equipment used is manufactured to limit VOC vapour emissions;General• The final plans must demonstrate compliance with all required SANS/ SABS codes and mustbe approved by the eThekwini Municipality;• A section drawing of the UST installation, including associated structures must be included onthe final plans submitted and must be approved by the eThekwini Municipality;• The installation must comply with the National Water Act (No. 36 of 1998);• The installation is to comply with local by-laws;• The installation is to comply with the National Building Regulations and Standards Act No. 103of 1977; and• All procedures and equipment used must be in accordance with the Occupational Health &Safety Act (No. 85 of 1993) and Regulations of South Africa.Installation and Operation of the Proposed ActivityThe overall legal responsibility for the development remains with ACSA as the landowner and applicant.However responsibility also rests with Sasol for the design and specifications of the PFS, particularly theUnderground Storage Tanks (USTs) and associated structures and for the installation of the PFS andUSTs, and any legal latent defects and installation liabilities. Sasol are also responsible for theoperation of the site including fuel supply and delivery. The PFS Operator will be responsible for the dayto day operation of the PFS and compliance with required Environment, Health and Safety requirementsand all required legislation.Site Access and DeliveriesThe PFS site is situated to the north of the Dube Boulevard/ King Shaka Drive intersection and to theeast of Dube Boulevard. Two points of access/egress are proposed, one off Dube Boulevard and theother of an unnamed street (Street 1) situated adjacent to the north, which runs along an east to westaxis.As concluded via the Traffic Impact Assessment, undertaken by Aurecon (Appendix D) all access andegress via Street 1 is permissible and access will only be permitted via a left slip from King Shaka Drivesouthbound, into the PFS. No egress into King Shaka Drive will be permissible.Sasol have indicated that fuel will be attained from 15 Hokkido Street, Island View and that twodeliveries per week are estimated.Department of Agriculture,Environmental Affairs & RuralDevelopment, KwaZulu-NatalBasic Assessment Report 2010Version 2: August 2010Page 9 of 46
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Basic Assessment Report - SRK

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