UNITED NATIONS INDUSTRIAL DEVELOPMENT ORGANIZATION

Transcription

1 Appendix 1 UNITED NATIONS INDUSTRIAL DEVELOPMENT ORGANIZATION Terms of Reference for the provision of the services on the Site Investigation related to Removal of both Technical and Economic Barriers for Initiating the Clean-up Activities for Apha- Hexachlorocyclohexane (Alpha-HCH), Beta-Hexachlorocyclohexane (Beta-HCH) and Lindane Contaminated Sites at the Organic Chemical Industry of Skopje AD (OHIS), Project ID These Terms of Reference (ToR) provide background information, and define the scope of services to be provided to undertake the project activities of the project entitled Removal of Technical and Economic Barriers to initiate the Clean-up Activities for Alpha-HCH, Beta-HCH and Lindane Contaminated Sites at OHIS. 1. General Background Information The Lindane complex in AD OHIS Skopje had the plants HCH, Lindane and Alpha-, Beta-, Delta-Trichlorobenzene (TCB), where HCH, Lindane, Tri-chlorine benzyl and hydrochloric acid were produced. These plants were a technological unity because combined they are a technological circle to support each other technologically. Within the HCH-Plant, technical HCH with gamma isomers of 12-14% were produced during photosynthesis of chlorine and benzyl. This technical HCH was a material for obtaining pure gamma isomers of 99,9%, i.e. Lindane, while the nonactive isomers such as Alpha, Beta and Delta, which were extracted in the Lindane Plant, were a material for obtaining Tri-chlorine benzyl and hydrochloric acid in the TCB Plant. The process of extraction of the gamma isomer from the HCH was performed with methanol as a solvent and had a circle flow in the process, but didn t take part in the process itself. The process of obtaining TCB and Hydrochloric Acid from the non-active isomers was performed with thermal dissolution in the presence of active coal used as a catalyst. The Lindane complex was gradually put into function since 1964 and functioned until 1977, when it was abandoned and stopped for ecological reasons, change of the market conditions and sales. The license issuer was the German firm C.H. BOEHRINGER SOHN from INGELHEIM A.RH. Lindane, the gamma isomer of Hexachloro-Cyclohexane (HCH) was produced by the process of Photo-Chlorination of Benzene. The produced mixture also contained other HCH isomers, i.e. Alpha-, Beta- and Delta-HCH. Approximately 37,000 m 3 of Alpha-, Beta- and Delta-HCH were temporarily stockpiled in open dumpsites covered with a layer of soil (2008). The Republic of Macedonia signed the Stockholm Convention on 23 May 2001, ratified it on 19 May 2004 and endorsed its National Implementation Plan (NIP) on 2 September After the inclusion of ten new POPs in the Stockholm Convention Annexes, Macedonia updated the existing NIP, given the basis for realization of activities linked with priorities and action plans for new POPs. Lindane and its

2 isomers have been added to the Stockholm Convention as POPs in Due to this addition, OHIS site is now recognized as POPs contaminated site. Among others, one of the priorities in the old and new NIP is to solve the problem with HCH-isomers in OHIS, Skopje. The realization of the project Removal of Technical and Economic Barriers for initiating the Clean-up Activities for Alpha-HCH, Beta-HCH and Lindane Contaminated Sites at OHIS will give the possibility to the Republic of Macedonia to solve the problem, which has the highest priority on the list of contaminated sites in the country. 2. Aim of the project The project objective is to set up a sustainable mechanism to ensure a sustainable clean-up operation at the selected HCH contaminated site for future industrial use, and to protect human health and the environment from their adverse effects by reducing and eliminating the releases of and exposure to HCHs (6,000 m 3 or 10,700 tons to be disposed within the project period). The Project includes the following components: - Legal framework and institutional capacities; - Characterization of the site and risk assessment; - Clean-up strategies and plan; - Establishment of clean-up mechanism and operations 3. Scope of the proposed Contracted Services The Contractor shall provide services within component 2 of the project, i.e. Characterization of the site and risk assessment component, especially the Output 2.1 aimed on Site characterization, i.e. detailed site investigation completion by sampling and analyses based on the sampling plan developed during the PPG and the Output 2.2: aimed on Survey of groundwater for drinking and irrigation purposes. Despite the extensive field investigations of Enacon performed in years more detailed information on contamination extend and character is needed. Based on the prioritization approach, need for additional data collection relates to both α- HCH, β-hch and δ-hch dumps and for HCH-contaminated soil. In case of the δ-hch-dump, data allowing more precise estimates of amounts and character of HCH-waste and HCH-contaminated soil deposited is necessary (only 4 core borings were performed within the δ-hch dump by Enacon). Furthermore, surrounding HCH-impacted soil should be investigated in a more detail. It is not recommended to investigate soil underlying the concrete containment of the δ-hch dump as the boring through the concrete bottom of the containment could act as a conduit for seepage of liquid δ-hch waste into the subsoil. It is expected that contamination of soil beneath the δ-hch dump shall be investigated after its removal. Initial estimate of the volume of contaminated soil for the purpose of the ToR shall be performed based on the intrusive investigation performed along the perimeter of the δ-hch dump. With regards to the α-, β-hch dump more homogenous waste was deposited there. In addition, temporal capping of the α,β-hch dump rather than removal is proposed as the first step. Thus further characterization of the α,β-hch dump shall be limited to the assessment of the volume and contamination of the soil overlying the α-,β-hch dump and of the soil surrounding the α,β-hch dump. Moreover,

3 detailed surveying of the α-, β-hch dump morphology shall be conducted in order for preparation of the topographic plan that shall serve as a baseline for designing the temporal capping of the α-,β-hch dump. Due to technical and economic reasons, it is not recommended to perform drilling through the whole thickness of the α,β-hch dump in order to investigate impact of the underlying soil. Similarly to the δ-hch dump, it is expected that contamination of soil beneath the α-,β-hch dump shall be investigated after its removal, if financial sources for removal of the α,β-hch dump are allocated. It is proposed to perform two groundwater monitoring campaign in order to assess current state of groundwater quality at the site as well as off-site domestic wells of Gorno Lišice. The results shall serve as a baseline for evaluation of effectiveness of remediation actions in order to assess impact of performed remediation actions on groundwater quality. Proposed capping of α-,β-hch dump and removal of δ-hch dump should result in gradual decrease of HCH concentrations in groundwater. Furthermore, the results shall be used for long-term evaluation of HCH concentration trends in groundwater. The last groundwater monitoring campaign was performed in Detailed site investigation shall be carried out by collecting and analyzing samples from the media of concern (ambient air, soil and groundwater) at sampling locations according to the methodology defined in the sampling plan that was prepared during the PPG phase. This detailed site investigation shall validate the extent of the contamination and characteristics of the site in order to prevent failure of the remediation project, i.e. selection of ineffective remedial actions as a result of inadequate site characterization. In close coordination with the Project Team Members and the National Consultant, the Contractor shall assist the project partners in the implementation of the project activities and outputs, through performance of the services listed below. 4. Specific tasks to be carried out under this contract The Contractor shall develop and perform the tasks specified in the Sampling Program as detailed below: I. Preparatory phase, II. Drilling of boreholes, III. Collection of soil and waste samples, IV. Collection of groundwater samples, V. Collection of ambient air samples, VI. Collection of vegetables samples VII. Laboratory analyses, VIII. Surveying, IX. Assessment of results of investigation, X. Reporting I. Preparatory phase Preparatory phase includes location of boreholes with respect to existence of underground utilities (in collaboration with site representatives), obtaining an approval for drilling locations by the site representatives and training of the staff involved in the field investigation on health and safety for drilling boreholes in a contaminated site including fire protection instructions particularly if a local company is subcontracted.

4 Preparing and Planning including sampling from soil, waste, groundwater, and ambient air including specific sampling plans referring to specific internationally accepted sampling methods. The number of samples shall be determined considering the statistical power, which is influenced by the three factors of (i) the statistical significance criterion used in the test, (ii) the magnitude of the effect of interest in the population, (iii) the sample size used to detect the effect. The number of samples found in this ToR is tentative, and therefore it is expected that the Bidder proposes the number of samples needed to have an acceptance level of the statistical power, a probability that type II error occurs having a null hypothesis H 0 that the mean of the population is not equal to that of a sample. Some limited analytical data in 2009 are available in the Enacon Report (2009), which may help estimate the mean and standard deviation of the pollution. II. Drilling of boreholes In total, 48 (Forty-eight) boreholes, shall be drilled. Of that amount 15 (fifteen) boreholes shall be drilled along the perimeter of both dumps by machine core drilling to the average depth of 6 (six) meters (m). 18 (Eighteen) boreholes to the average depth of 1.8 m shall be drilled on the top of the α-,β-hch dump by core drilling using electricity driven hand operated percussion equipment. Fifteen (15) boreholes to the average depth of 3.6 m shall be drilled by the same method on the top of the δ- HCH dump. It is not recommended to investigate soil underlying the concrete containment of the δ-hch dump as the boring through the concrete bottom of the containment can act as a conduit for seepage of liquid δ-hch waste into the subsoil. An organic wax or vegetable-based oils shall be used to lubricate the drilling tubs and equipment instead of mineral grease. Candidate locations of soil boreholes are depicted in Annex 3. The Ministry of Environment and Physical Planning/POPs Unit shall provide the relevant info and help the Contractor to obtain approval for the collection of the superficial soil samples from the sampling points located in a public or private property. The Ministry of Environment and Physical Planning shall ensure the Contractor of granting access to the sampling sites. III. Collection of Soil and Waste Samples Four discrete samples of drilling core from 6 (six) m - deep soil borings situated along both dumps perimeter shall be collected from the depth intervals m below ground level (bgl), m bgl, m and from the lowermost level m bgl (60 (sixty) samples in total). One composite sample of overlying soil shall be collected from each of 1.8 m - deep soil borings located on the top of the α-,β-hch dump (18 (eighteen) samples in total). Three discrete samples of drilling core shall be collected from each of 3.6 m - deep boreholes located on the top of the δ-hch (45 (forty-five) samples in total). Precise depth intervals of sampling shall be chosen based on actual vertical profile of waste deposited a sample shall represent one visually recognised waste type). In addition, 8 (eight) composite samples shall be selected as representative samples of main waste types recognised during visual description of drilling core for extended range of laboratory analyses. Furthermore 2 (two) undisturbed samples of HCH waste and 2 (two) undisturbed samples of contaminated soil shall be collected for laboratory determination of the bulk density and particle size distribution.

5 Following the sampling and core description, soil boreholes shall be backfilled. The uppermost 2 (two) m of each boreholes shall be sealed with bentonite. The redundant soil shall be temporarily deposited in the δ-hch dump till its final disposal within the removal of δ-hch dump. After the completion of each boring, the drilling tubes shall be cleaned thoroughly to prevent cross-contamination. Surface sealing shall be reinstated to pre-drilling conditions. Collection of 10 superficial soil samples to the depth of 0.3 m from 10 (ten) sites located at the surrounding of OHIS site and the city of Skopje in order to determine the background of the HCH contamination. These sampling spots are aimed to produce as much information as possible with such a limited number of samples. First, 4 (four) samples (Sample # 1, 2, 3, and 4) shall be taken at a distance of 1 (one) km from the waste sites central point of the OHIS HCH site (See Fig. 1). The other 4 (four) samples shall be taken from spots that lay on a straight line that passes through the same central point as above to the direction of the most frequent wind direction (Fig. 1 and Annex 6), i.e. from Skopje along the Vardar river flow to Drachevo, which is the East to South-East direction. The distances between the Sampling Points 4 and 5, 5 and 6, 6 and 7, and 7 and 8 are 2, 3, 5 and 8 km, respectively, as shown in Fig. 1. The axis of the most frequent wind direction shall be defined on-site during the sample collection in consultation with the national consultant. 3 (Three) of the 10 (ten) superficial soil samples shall be collected on agricultural land in the area between the OHIS site and Sampling Point 8, Drachevo. All samples shall be collected as a composite samples representing top soil horizon 0.0 to 0.3 m bgl. Figure 1: Arbitrary location of the sampling spots The last 2 (two) samples shall be taken from remote spots that cover the distant locations in the direction of Skopska Crna Gora, i.e. Stajkovci and the direction near Saraj (See Picture 1). These samples shall serve as the background levels. More information on these sapmling points shall be given once the Contractor is selected.

6 Picture 1: Location of the two remoted sampling spots at Stajkovci and Saraj This background, i.e. average soil HCH contamination level shall serve as a reference when defining the remediation value. Samples shall be stored in glass 400 ml containers plugged with air-tight caps. The containers shall be stored in portable cooling boxes and shipped in these coolers to a laboratory. Sample spikes shall be added following the adopted sampling/analytical methods. The Ministry of Environment and Physical Planning POPs Unit shall provide the relevant information and shall help the Contractor to obtain approval for the collection of the superficial soil samples from the sampling points located in a public or private property. The Ministry shall ensure the Contractor of granting access to the sampling sites. IV. Collection of Groundwater Samples Two groundwater monitoring campaignes shall be performed: in low (late summer) and high (early spring) season. Within each monitoring campaign groundwater samples shall be collected from 18 (eighteen) monitoring wells located on site: HS-1, HS-2, MW-1 to MW-16; and 3 domestic wells in Gorno Lišice marked as DW-3, DW-4 and DW-6, see Annex 4. Samples shall be collected using submersible pumps after well purging in a dynamic low flow regime (Q<0.1 l/s). During well purging 3 volumes of water in a well have to be pumped out and physical-chemical parameters of pumped water (temperature, ph, redox potential and specific conductivity) shall be measured. After each collection of groundwater sample the sampling pump shall be cleaned in a nonchlorinated and non-phosphates detergent solution and afterwards rinsed with potable water. Measured data shall be documented in a sampling protocol. Parameters of on site monitoring wells are given in below Table 1.

7 Table 1: Parameters of on site monitoring wells (Enacon, 2009) Well Drilling depth (m bgl) PVC casing ID 75 mm to (m bgl) Screen from to (m bgl) Groundwater encountered (m bgl) Steady groundwater level (m bgl) MW MW MW MW MW MW MW MW MW MW MW MW MW MW MW MW Note: Parameters of the domestic wells and of the wells HS-1 and HS-2 are not available V. Collection of ambient air samples Four ambient air samples shall be collected. One sample shall be taken from the vicinity of the HCH dumps at OHIS site, and the other three locations shall be defined by the Contractor taking into consideration the most frequent wind direction (MFWD). (Note: the Annex 5 presents the locations of the ambient air monitoring stations of the Ministry of Environment and Physical Planning, which are fenced and protected and which might be used for the air sampling activities). For ambient air monitoring, both active sampling and passive sampling techniques shall be used and the details shall be presented in the proposal. The active sampling requires a high-volume sampling device (reference method/document: Guidance on the Global Monitoring Plan for Persistent Organic Pollutants (document UNEP/ POPS/COP.6/INF/31, chapter , page 42: 74/mctl/ViewDetails/EventModID/870/EventID/396/xmid/10240/Default.aspx). The passive air samplers do not require electricity supply and also provide equally accurate information on concentrations of HCH (reference method/document:

8 Guidance on the Global Monitoring Plan for Persistent Organic Pollutants (document UNEP/ POPS/COP.6/INF/31, chapter , page 43). The Bidder is requested to propose the technical set up of the air sampling including the cost breakdown. The Bidder is encouraged to propose a sampling method. If both methods are proposed, a comparison table of the advantages and the disadvantages of both sampling methods shall be presented. VI. Collection of vegetables samples Nine samples of vegetables in total shall be collected in the agricultural land between the OHIS site and the residential area of Gorno Lisice. The vegetables shall include both leafs vegetables (lettuce) and root vegetables (celery, potatoes). Samples shall be collected within various distances from the HCH dump sites in order to assess lateral extend of the impact on vegetable quality. In 3 (three) sampling locations both samples of vegetables and superficial soil (see Chapter 3: Collection of Soil and Waste Samples) shall be collected. Refer to Table 2 for the target chemicals. VII. Laboratory Analyses Technical requirements of laboratory analyses shall be as follows: Discrete samples of drilling core from 6 (six) m - deep soil borings shall be analyzed for content of chlorinated pesticides. Composite samples of overlying soil from 1.8 m deep soil borings shall be analyzed for chlorinated pesticides. Discrete samples of drilling core from 3.6 m - deep soil borings shall be analyzed for content of chlorinated pesticides. Composite samples of drilling core from 3.6 m - deep soil borings shallbe analyzed for chlorinated pesticides, chlorobenzenes, chlorophenols, PCB, dioxins, metals, soil ph, combustible sulphur content, total organic halogens (TOX), halogens (TX), total petroleum hydrocarbons (PH C10-C40) and polycyclic aromatic hydrocarbons (PAH). Undisturbed samples of HCH waste and of overlying/underlying soil shall be collected for laboratory determination of the bulk density and particle size distribution. Composite samples of superficial soil shall be analyzed for chlorinated pesticides. Groundwater samples shall be analyzed for chlorinated pesticides, chlorobenzenes, volatile organic compounds (VOC) and mercury. Ambient air samples shall be analyzed for α-hch, β-hch, γ-hch, δ-hch + chlordane, DDT, dl-pcb - coplanar, PCB-indicator and selected set of polyaromatic hydrocarbons (PAHs - set of 16 by standard). The air samples need to be first pretreated (extracted) and then analyzed in the laboratory by the gas chromatography. There is an array of methods that can be used, for example GC-ECD, GC-MS (both HRMS or LRMS are possible) The reference is available: document UNEP/POPS/COP.6/INF/31 ( chapter 5.2 and 5.3., page 81-87). Vegetables samples shall be analyzed for chlorinated pesticides and PCB. Number of samples and methods of respective laboratory analyses are given in Table 2.

9 Apart of parameters listed in Table 2, water content (moisture) is important for ITD unit design, since energy consumption of the process affects significantly. It is assumed that water content shall be analyzed for each soil sample as part of the chemical analysis procedure. Table 2: Scope of laboratory analyses and their methods Parameter Method* Number of analyses Reasoning Analyses soil, waste Chlorinated pesticides (Aldrin, isomers (α, β, γ and δ) HCH, DDD, DDE, DDT, Dieldrin, Endosulphan, Endrin, HCB, Heptachlor, Methoxychlorine, t- heptachlorepoxide) 8081, ISO 10382: Concentration of organic chlorine significantly affects incineration of material, since more intensive offgas treatment is required. Material input to the kiln has to be regulated with respect to the organic chlorine content. As for ITD, when all chlorinated pesticides shall be evaporated and condensed, paramater is necessary for ITD unit design (mass flow, energy consumption) Dioxins (PCDD & PCDFs) 1613, US EPA 8290, ISO 13914: Necessary parameter for all technologies. Higher dioxins concentrations require specific safety mesaures for waste handling to be implemented. Chlorobenzenes: Chlorobenzene, 1,2 Dichlorobenzene, 1,4 Dichlorobenzene, 1,3 Dichlorobenzene, 1,3,5 Trichlorobenzene, 1,2,4 Trichlorobenzene, 1,2,3 Trichlorobenzene, sum of 1,2,3,5 Tetrachlorobenzene and 1,2,4,5 Tetrachlorobenzene, 1,2,3,4 Tetrachlorobenzene, Pentachlorobenzene, HCB. Chlorophenols: 2-Chlorophenol, 3-Chlorophenol, 4-Chlorophenol, 2,6- Dichlorophenol, 2,4@2,5-8081, US EPA 8270, ISO , US EPA 3500, ISO Chlorobenzenes are dioxins precursors during the incineration process. Concentration of organic chlorine compounds affects incineration of material significantly, since more intensive off-gas treatment is required. 8 Chlorophenols are dioxins precursors during the incineration process. Concentration

10 Dichlorophenol, 3,5- Dichlorophenol, 2,3- Dichlorophenol, 3,4- Dichlorophenol, 2,4,6- Trichlorphenol, 2,3,6- Trichlorphenol, 2,3,5-Trichlorphenol, 2,4,5-Trichlorphenol, 2,3,4-Trichlorphenol, 3,4,5-Trichlorphenol, 2,3,5,6-Tetrachlorophenol, 2,3,4,5-Tetrachlorophenol, 2,3,4,6-Tetrachlorophenol, Pentachlorphenol PCBs 8082, ISO of organic chlorine compounds affects incineration of material significantly, since more intensive off-gas treatment is required. 8 PCBs are dioxins precursors during the incineration process. Concentration of organic chlorine compounds affects incineration of material significantly, since more intensive off-gas treatment is required. Metals (As, Hg, Cd, Zn, Pb, Cu, Ba, Ni, V, Cr, Sn, Co) 200.7, US EPA , ISO Concentration of volatile metals (e.g. Hg) are important for incineration plants and also for ITD to select suitable off-gas treament method. Nonvolatile metals (e.g. Cd, As, Pb shall remain in the treated soil by ITD. Soil ph 9045, ISO 10390, EN Parameter is requested by one of the waste incineration plant operators. Exact reason is not known. Combustible sulphur content EN Important for incineration and ITD. Presence of combustible sulphur affects sulphur dioxide concentration in off-gas directly. High sulphur concentration requires more intensive off-gas treatment. Total organic halogens (TOX) Similarly to organic chlorine, presence of other organic halogens (Br, F) affects strongly the requirements on

11 treatment of off-gas formed during incineration or during ITD process. TOX can be also used for cross checking of results of laboratory analyses of all chlorinated organic compounds. Total halogens (TX) US EPA 9056, 9253, CEN/TS In combination with TOX, parameter TX enables to perform complete mass balance of halogens including total inorganic halogens (TIX). TIX affects slag and ash quality and quantity formed during incineration and soil quality after treatment in ITD unit. TX is important from the view of PCDD/PCDF formation (de novo synthesis). Total petroleum hydrocarbons (TPH) Polycyclic aromatic hydrocarbons (PAH) Bulk density C10-C40: EN , US EPA ASTM D Important for ITD: Petroleum hydrocarbons shall be evaporated and condensed during the process. Paramater is necessary for ITD unit design (mass flow, energy consumption) No concentration limitation exists. 8 Important for ITD: PAHs shall be evaporated and condensed during the process. paramater is necessary for ITD unit design (mass flow, energy consumption) No concentration limitation exist. 4 Necessary parameter for conversion of volume to mass, expecially for the pure HCH waste, where only density estimate is available. Particle size distribution ISO Grain size for ITD has to be less than 30 mm. Otherwise, pre-

12 treatment mill has to be installed. Analyses water Chlorinated pesticides (Aldrin, isomers (α, β, γ and δ) HCH, DDD, DDE, DDT, Dieldrin, Endosulphan, Endrin, HCB, Heptachlor, Methoxychlorine, T- heptachlorepoxide) Chlorobenzenes 8081, ISO 27108: , US EPA 8270, EN ISO Contaminants of OHIS origins identified in groundwater by previous investigations (Enacon 2009) 42 Contaminants of OHIS origin identified in groundwater by previous investigations (Enacon 2009) Volatile organic compounds (Chlorinated Ethenes, including Vinylchloride and Ethanes, BTEX) US 8021 EPA 42 Contaminants of OHIS origin identified in groundwater by previous investigations (Enacon 2009) Mercury 200.7, US EPA , ISO Contaminants of OHIS origin identified in groundwater by previous investigations (Enacon 2009) Analyses ambient air α-hch, β-hch, γ-hch, δ-hch and chlordane, DDT, dl-pcb - coplanar, PCB-indicator and selected set of Polyaromatic Hydrocarbons (PAHs - set of 16 by standard) Analyses vegetables GC- ECD 4 Chlorinated pesticides (Aldrin, isomers HCH, DDD, DDE, DDT, Dieldrin, Endosulphan, Endrin, HCB, Heptachlor, Methoxychlorine, t- heptachlorepoxide) US 8081 EPA 9 PCB 8082, ISO *- other accredited methods that give comparable results will be accepted VIII. Surveying For the purpose of balancing the amount of waste in both dumps and for potential designing the temporal capping of the α,β-hch dump, all soil boring

13 performed shall be surveyed (X, Y, Z coordinates). In addition, detailed topographic plan of both dumps shall be prepared. In case of the α-,β-hch dump, special care shall be taken to survey of concrete side walls and of topography of the dump surface. The topographic plan shall serve as a baseline for designing the temporal capping of the α-,β-hch dump. IX. Data documentation and assessment Field work shall be documented in forms of borings logs, groundwater sampling protocols and a survey protocol including photographic evidence of sampling activities. Measured field data and results of laboratory analyses shall be presented and processed in following forms: Original laboratory protocols; Tables of measured field data; Tables of results of laboratory analyses compared (highlighted exceedances) with Dutch soil intervention values and groundwater target values (Dutch Ministry of Housing, Land Planning and Environment, 2009); GIS information including maps of soil contamination in the same depth intervals as presented by Enacon (2009). Results of soil investigation by Enacon shall be taken into account; Groundwater contamination maps (by sum of HCH isomers and by individual chlorinated aliphatic hydrocarbons); Groundwater contour map; Cross-sections of the δ-hch dump (both in NE-SW and NW-SE directions); 3 dimensional schemes/models of the α-,β- and the δ-hch dump, where different contamination levels and/or waste type shall be expressed in cubic meters/weight; Calculation of volumes and mass of recognised waste types and overlying soil in the δ-hch dump; Calculation of volumes and mass of the HCH waste and overlying soil in the α-,β- HCH dump, Enacon soil boring data shall be taken into account; Estimate of the volume and mass of soil contaminated above preliminary limits set for HCH, Enacon soil boring data shall be taken into account; Evaluation of the soil properties (clay, moisture, etc.) at different stratigraphy; Evaluation of miscellaneous material (e.g. metal drums, rubber, construction waste, etc. ) presence in the δ-hch dump; Detailed topographic plans of both the α-,β-hch and δ-hch dumps in.dgn and.dwg formats. List of measured points with x-, y-, z-coordinates in.xls or.xlsx formats. X. Reporting The Contractor shall provide monthly progress reports to UNIDO with copy to the POPs unit of MoEPP. All the remaining reportings shall be laid out as shown under section 11 Deliverables and submission timeline.

14 All reports and the annexes shall be delivered in electronic forms (doc and pdf formats). Topografic map of the dumps shall be also provided in.dwg format. All tables in text and annexes shall be provided also in excel format (.xls or xlsx). 5. Liability The Contractor shall provide and maintain adequate liability insurance, as per UNIDO Contract and related General Terms and Conditions. 6. General Time Schedule The overall duration of the Contract should not exceed 12 months. The activities outlined in this ToR shall be completed within 3 months after the contract is signed by both parties, except of the second groundwater monitoring campaign, which has to be performed in high (early spring) season (within 9 months). A detailed 12 months work plan corresponding to the below deliverables shall be submitted by the Bidder. 7. Contractor s qualifications and requirements In order to perform the requested Services, the Contractor (and/or its sub- Contractor(s)) shall possess the required relevant experience in the implementation of international technical assistance or international collaboration projects of similar nature and prove to be an accredited laboratory according ISO and/or accredited methods for experienced analytical chemists and for different parameters as per Table 2. In its proposal the Bidder, shall indicate which laboratories any of the above analysis shall be delegated to, if need be. 8. Requirements of Contractor s Personnel To perform the activities specified herein, the Contractor shall engage staff members and consultants as needed. Please indicate clearly academic and professional background of each member involved in the proposed activities and how long the members shall be involved in which activities including cost breakdown. The Contractor s team of key personnel shall collectively meet the following requirements: - Experience in conducting detailed site investigations including sampling of different media, i.e. soil, groundwater, air and vegetables; 9. Language requirements The working language is English. All deliverables should be made available in English. If required, the translation and interpreter costs should be separately indicated in the bidding document. 10. Budget breakdown template The Bidder shall provide a detailed costs breakdown as shown in Appendix No. 3. In addition to the cost breakdown, the Bidder shall submit with this form any additional data, supporting schedules and substantiation, which are reasonably necessary for the conduct of any appropriate evaluation of the proposed contract costs. All costs on the form should be stated in United States dollars.

15 11. Deliverables and submission timeline The Contractor will be paid through 3 instalments. Payments shall be made within 30 days after UNIDO s approval of deliverables submitted by the Contractor, confirming that the required activities are delivered, and upon receipt of respective invoice. Payment # Deliverables Time Schedule and Proposed Payment st set of deliverables: Upon Contractor s submission and UNIDO s receipt and acceptance of the following: - Sampling and analysis plans including locations of boreholes with respect to existence of underground utilities defined - Approvals for the boreholes drilling 2nd set of deliverables: Upon Contractor s submission and UNIDO s receipt and acceptance of the following -Report on collected, prepared for transport and delivered to the accredited laboratory of the following samples as per approved Plan - Soil and waste samples, - Groundwater samples, - Ambient air samples, and - Vegetables samples 3rd set of deliverables: Upon receipt and acceptance by UNIDO of the following: - Soil and waste samples, - Groundwater samples, - Ambient air samples, and - Vegetables samples - Analysis Report in accordance with accreditated methods - Field survey results Report - Report on results of investigation assessed and data documentation prepared - Report on detailed site investigation prepared including all the requirements described in the ToR as well as findings and limitations - Any other deliverables to be added as a result of the bidding Approximately by Month 2 of the contract implementation period 20% Approximately by Month 6 of the contract implementation period 40% Approximately by Month 12 of the contract implementation period 40%

16 12. Background information Project Document ( Existing studies on OHIS contaminated site: Updated Risk Assessment Report (Enacon 2009: final_2009.pdf) Updated Risk Assessment Analyses - Annexes (Enacon 2009: ( Updated Feasibility Study for Remediation of the HCH Waste Dumps and HCH- Contaminated Soil (Enacon 2009: pdf) OHIS Site Remediation Project- Conceptual Design (D appolonia 2010:

17 Annex 1: Site Location Map

18 Annex 2: Site Layout Map

19 Annex 3: Soil Boring Location Map

20 Annex 4: Groundwater Monitoring Well Location Map