Meski Çevre yönetim plani hazirlik dokümani

1.2METHOD AND SCOPE

MESKİ had a feasibility study and a project done by Mavi Mühendislik firm in 2005 for said project to be included in the Municipal Services Project (Mavi Müh., 2005). MESKİ, being included in the financial support process with this study, has first invited tenders for a Consulting Service to execute construction of connection of reservoir, rising center and connection lines between reservoirs, which makes part of the Mersin Water Supply Rehabilitation Project and which will provide distribution of water at east-west direction of the city. In order to perform this service, a contract was signed between MESKİ and Temelsu Uluslararası Mühendislik Hizmetleri A.Ş. in 13.02.2007 for the work of 'Examination, Preparation of Tender Documents and Consulting Services for the Implementation Projects of Reservoirs, Connection Lines Between Reservoirs and Rising Centers (Contract No. MES C2)’. Under the scope of Consulting Services, first the project data of 2005 will be examined and updated. In parallel, these projects will be made a final project, tender documents will be prepared, the tender process will be supported and construction supervision will be provided.
Under the scope of the abovementioned implementation project, an Environmental Management Plan (EMP) must be established to examine and assess its Environmental Impacts during construction and operation processes and to minimize such impacts. For this purpose, MESKİ has signed a contract in 05.04.2007 to have Private Consulting Services with Assoc. Prof. Erdem Görgün, executive director of io Environmental Solutions Research and Development Company.
Within the content of this Environmental Management Plan, measures to be taken against the specified likely impacts and monitoring parameters of these measures have been determined. Organizations and institutions responsible in implementation process of this plan was defined and their obligations were specified. Additionally, sufficiency of these organizations in meeting their obligations were examined and the actions they should take to repair their defects were defined.
Environmental impacts on people living in regions where the project was implemented were examined and a "Public Awareness Meeting" was held on April 30, 2007. A work programme was established in accordance with all these assessments and an Environmental Management Plan was prepared in which the Plan stages were detailed.
Works performed under this scope may be listed as follows.

1. 
   Category B Environmental Assessment under "Environmental Framework for Municipal Services Project
   
2. 
   Preparation of the "Environmental Management Plan", which is the main document for Category B Environmental Assessment under OP 4.01 document.
   
3. 
   Public Participation Meetings
   

2DESCRIPTIONS OF THE REHABILITATION PROJECT

2.1BACKGROUND OF THE PROJECT

After establishment of Mersin Greater Municipality with the Decree of Force of Law no 504 dated 09.09.1993, General Directorate of Mersin Water and Sewerage Administration (MESKİ) was established with the decision no. 95/6750 dated 04.05.1995 of the Board of Ministers to provide Water and Sewerage services of the Mersin Greater Municipality and for this purpose, to establish all plants needed, to take over all existing ones and to operate them centrally. MESKİ (Mersin Greater Municipality, General Directorate of Water and Sewerage Administration) is responsible for provision of services for water, sewerage system, wastewater treatment and stormwater drainage to residential units in the service area of Mersin Greater Municipality. Last project about water supply system of the Town Center was made in 1994. Particularly because of rapid population growth since this date and enlargement of service area of the Mersin Greater Municipality, existing water supply system became insufficient. Thus, MESKİ had a project study done by Mavi Mühendislik firm in 2005 for extension of main supply system consisting of main supply lines, reservoirs and rising centers. With this study, MESKİ signed a Sub Credit Agreement of 25,056,918 Euros in 08.02.2006.
169 km section of existing 1,250 km water supply network has been replaced by the operator firm and MESKI demands replacement of remaining part by using HDPE type pipes under this credit. With the credit support, 25.056.918 Euros of the cost of abovementioned Project of Water Supply Network Rehabilitation and Construction of Reservoir and the Connection Lines Between Reservoirs (27,340,458 Euros) is provided.

2.2PROJECT CONTENT

In the existing water supply system of Mersin, there are 6 water reservoirs and 3 pumping stations. The network consists ACP (Asbestos Cement Pipe), Cast Iron, PE and PVC pipes with various diameters. There are 6 pressure zones in the system. In order to reduce the loss-unaccounted for water rate about 65% in Mersin, an inspection was made and in particular ACP (Asbestos Cement Pipe) and Cast Iron pipes were specified to cause physical losses. With the rehabilitation project, priority was given to replacement of these pipes. (MESKİ, 2006)
Target of this project is to provide sufficient operation pressure by reorganizing the pressure zones, to measure the water distribution amounts with fixed flowmeters by forming local measurement areas, to minimize physical and illegal losses in the system and both to reduce the loss rate and to ensure healthful potable water transmission by replacing the asbestos and cast iron pipes at the end of their life with HDPE (High Density Polyethylene) pipes. Precautions regarding to disposal of ACP are explained in further sections. Moreover, in order to stabilize water coming with the 2nd Transmission line, the project also consists new reservoirs, rising centers and rising mains. Also personnel trainings are made for continuation of operational productivity. (MESKİ, 2006)
General target of the water supply rehabilitation project is to increase MESKI's technical and financial service level in a sustainable level. Target of this contract is to ensure supply of water to consumers with appropriate pressure and sufficient quantity, with the physical investment under the project, with most appropriate investment cost.
"Water Supply Structures Rehabilitation Project", with the general layout in town shown in Figure 1, is divided into two main parts:

1. 
   Improvement of the existing network
   
2. 
   Construction of new Reservoirs and Rising Centers
   

Works to be carried out in this scope may be summarized as follows:

2.2.1Improvement of the existing network

Data of the network to be rehabilitated with the existing network given in Table 2 .1 include statements made by Mavi Mühendislik firm in 2005. In the assessments made here it was stated that project assumptions could be changed with the loss-unaccounted for water control to be made at site. Priority will be given to control and rehabilitation of main and basic pipes in implementation of this project. MESKI, Bank of Provinces and State Hydraulic Works (DSI) archives were scanned and surveys were made at site with MESKI's water network chief. As a result of the studies carried out, it was decided to keep PVC and PE pipes with  100 mm and above diameter laid in 1994 and later. (Mavi Müh., 2005)

Table 2.1 Existing Water Supply Network Lines and Suggestions (Mavi Müh. 2005)

Diameter	1.Zone	2.Zone	3.Zone	4.Zone	5.Zone	6.Zone	7.Zone	8.Zone	Total
Ø 110 PE	27,153	308,095	82,099	29,556	15,338	15,825	2,003	6,813	486,882
Ø 140 PE	11,312	28,159	8,032	5,488	3,067	3,514	112	515	60,199
Ø 160 PE	17,043	44,884	19,546	1,934	1,950	4,046	0	675	90,078
Ø 200 PE	236	0	0	0	0	0	0	0	236
Ø 225 PE	13,539	19,271	5,158	2,012	2,250	4,617	631	816	48,294
Ø 280 PE	4,659	14,148	5,630	6,956	494	1,293	0	677	33,857
Ø 355 PE	11,261	7,350	935	1,003	2,735	836	16	372	24,508
Ø 350 PE	4,387	11,361	1,617	1,772	0	490	0	610	20,237
Ø 400FRP	7,283	4,615	0	840	512	3,462	832	0	17,544
Ø 450 FRP	0	327	0	0	0	0	0	0	327
Ø 500 FRP	9,142	6,891	6,575	3,260	1,245	507	535	520	28,675
Ø 600 FRP	2,853	2,339	2,946	1,974	1,839	3,359	0	1,080	16,390
Ø 700 FRP	2,440	35	1,558	998	0	0	0	0	5,031
Ø 800 FRP	1,145	8,120	0	0	0	573	0	0	9,838
Ø 900 FRP	0	890	0	940	0	1,164	0	0	2,994
Ø 1000 FRP	0	876	2,402	0	0	0	0	0	3,278
Ø 1200 FRP	0	5,543	0	0	0	986	0	0	6,529
WILL BE REHABİLİTATED	112,453	462,904	136,498	56,733	29,430	40,672	4,129	12,078	854,897
WILL NOT BE CHANGED	113,192	211,746	22,285	50,443	17,437	0	0	0	415,103
WILL BE NEEDED IN THE FOLLOWING YEARS	43,898	120,411	20,173	71,202	52,625	51,894	134,569	17,117	511,889
GRAND TOTAL	269,543	795,061	178,956	178,378	99,492	92,566	138,698	29,195	1,781,889

2.2.2Construction of New Reservoirs and Rising Centers

In the feasibility study of 2005, Reservoir Volume requirements were specified using data calculation methods of the Bank of Provinces, and additional reservoir requirements were determined accordingly. Based on the Project Consultancy in March 2007, designs of 2005 were subjected to a preliminary check, according to the agreement made with Temelsu Mühendislik. Accordingly, calculation methods of the Bank of Provinces and DSİ were compared and taking the fire flows into consideration in addition to the 2005 calculations, optimum values for reservoir volume requirements were obtained. The plants, which are proposed in accordance with these reservoir volume figures are given in Table 2 .2 and Table 2 .3. Monitoring and supervision plans for proposed additional reservoirs, are explained in further sections.

Table 2.2 Proposed Additional Reservoirs (Temelsu 2007)

Proposed Additional Reservoirs
Reservoir Name	Volume (m^3)	Max. Depth (m)	Min. Depth (m)
DY2	20.000	71.00	65.50
DY2A	15.000	85.25	80.25
DY3	10.000	108.40	103.40
DY4	5.000	149.50	144.50
DY6	5.000	129.50	124.50
DY7	4.000	222.00	217.50
DY8	4.000	183.50	179.00
DY9 (2. Stage)	1500	230.00	226.00
Total Proposed Addition Reservoir Volume (m^3)	63.000 (1. Stage) 64.500 (2. Stage)

* DY: Proposed New Reservoir

Table 2.3 Proposed Additional Rising Centers (Temelsu 2007)

Proposed Rising Centers
Rising Center Name	Pump Feeded by (Reservoir)	Pumping to	Stage	Number and Properties of Pumps
TMY1	D1	D2-DY2 Reservoirs and TMY2 Rising Center	1. Stage	Q= 288 l/s Hm= 40.00 m 6 adet
TMY2	DY2A	D6-DY6	1. Stage	Q= 138 l/s Hm= 58.00 m 3 adet
P2 Pumping Station	D3-DY3	D4-DY4	1. Stage	Q= 81 l/s Hm= 56.00 m 3 adet
TMY4	D2-DY2	DY2A	1. Stage	Q= 250 l/s Hm= 31.00 m 5 adet
TMY5	D6-DY6	DY8	1. Stage	Q= 36 l/s Hm= 73.00 m 3 adet
TMY6	D5	DY7	1. Stage	Q= 22.5 l/s Hm= 105.00 m 3 adet
TMY7	DY8	DY9	2. Stage	Q= 15 l/s Hm= 72.00 m adet

* TMY: Proposed Rising Center

Table 2.4 Proposed Additional Connections Between Reservoirs (Temelsu 2007)

Proposed Additional Connections Between Reservoirs
Between -------- / -------- Connection Pipe	Pipe Length (m)	Pipe Diameter (mm)	Pipe Type
D1 / D2-DY2	3419.00	1100	FRP
D2-DY2 / DY2A	3865.00	900	FRP
DY2A / D6-DY6	1546.00	500	FRP
D6-DY6 / DY8	1512.00	280	HDPE
DY8 / DY9 (2. Stage)	1000.00	125	HDPE
D3-DY3 / D4-DY4	2969.00	400	FRP
D4-DY4 / D7-DY7	2328.00	225	HDPE

FRP: Fiber-glass Reinforced Plastic Pipe

HDPE: High Density Polyethylene

Figure 2.1 Proposed Water Distribution System (Temelsu 2007)




Figure 2.2 Existing P1 Pumping Station and TMY1 Rising Center Location



Figure 2.3 DY3 Reservoir Location (Through D3 Reservoir)