IEER Vitali

7/31/2019 IEER Vitali

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Executive Summary

1. Brief Project Description

This Proposed Vitali Spring Source Development Project is an alternative solution to the local water

supply problem of Barangay Vitali, Zamboanga City. The previous project which involved the construction

of the Tamion Production Well has not been commissioned up to the present due mainly to the water

quality yielded from the said production well. Thus, the same cannot be supplied to the constituents of

this barangay as this has not complied with the standards for drinking water.

The Planning & Design Division, Engineering Department of the Zamboanga City Water District

considered utilizing surface water to address this problem in water supply in the barangay. Thus, the

conceptualization of utilizing the Kamalik Spring at Sitio Kamalik some 5 kilometers from the Tamion

Production Well.

This project is composed of the construction of a 90 m 3 capacity ground tank, pipelaying of 3,194

linear meters of 110 mm (O.D.) x 6 meters Polyvinyl Chloride (PVC) Pipeline, Class 150 and 1,630

linear meters 100 mm (I.D.) Galvanized Iron (G.I.) Pipeline (Schedule 40) and the construction of one

(1) unit 9m2

(4.8 m3

capacity) concrete collector chamber at the source.

This proposed water system has a total budget cost of ten million five hundred fifty-six thousand two

hundred ninety-five pesos and 10/100 (Php 10,556,295.10).

It is expected that during the construction phase of this project there will be an increase in the

generation of suspended particles, particularly dust, as excavation works will be performed for the

pipelaying activities. The construction phase would create short-term visual impacts from the appearance

of the construction operations and their impact on the surrounding landscape which are temporary in

nature. The same effect would be seen on the construction phase of the source collector chamber and

the ground tank. But the magnitude of this effect varies in magnitude such that there will be moderate

significance in the construction of the source collector chamber while the pipelaying activities and the

construction of the ground tank has negligible significance accounting to its strategic location and the

ambient environment. At most, the impacts that will be caused to the natural environment of the spring

source will be the displacement of the natural rocks on the stream accountable to the construction of

source collector chamber. The flow will be redirected such that the maximum flow will be gathered

towards the collector chamber. No logging activities will be made and the most minimal disturbance to the

natural flora and fauna in the spring environment will be caused due to the construction works. In fact,

reforestation activities will be conducted to improve the yield and quality of the water as soon as the

project has been completed and the water system commissioned and has commenced operation.

2. Brief Summary of Projects IEE Process

The possible environmental impacts that may be caused by this project has been identified by

comparison with related projects that have been previously done and observing the environmental

impacts that it has caused. At the same time, relevant literature has been consulted particularly on similar

undertakings which have been assessed by experts. Series of site inspections have also been conducted

in the project site to include the identification of land ownership over the proposed site for the construction


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of the concrete ground tank and the identification of title of the claimants of the land in the vicinity of the

spring source that will be utilized for this project.

In the process, the stakeholders in the community were consistently consulted regarding this project.

The major concern of the current users of the water body is whether they would still be able to utilize the

same after it has been developed. The logging issues in the community was also raised particularly to the

barangay chairman, Jose Alavar, which he accepted graciously and committed to put an end to this inview this development.

3. Summary of Baseline Characterization

The project site, considering the land formation at Barangay Vitali, is located at higher elevations

with the general terrain to be slightly mountainous. Soil classification is generally clayish. For most parts

of the study area, there are vast open spaces which have evidently been reduced as such due to past

logging activities in the area.

There are water bodies, particularly springs,in isolated areas of the barangay which have not

been explored. Yet according to locales, there are quite a number which are presently used for daily

activities and which have not been explored by this office.

The air quality in the area is still at its purest state. No point sources were found in the area such

as smoke stacks from industrial establishments. At most only smoke from backyard burning, use of

firewood for cooking and from the few motorcycles that transport goods and persons to the area, are the

sources of air pollutants in the area.

The locales within the project site and study area are mostly engaged in agricultural activities

usually merely for consumption. Logging activities were also evident in the area. Others are engaged in

latex harvesting in a rubber plantation located adjacent to the study area and approximately 700 meters

from the project site for the source collector chamber.

4) Summary of Impact Assessment and Environmental Management Plan

The hauling activities and earthworks during site preparation, particularly during the excavation

works for the pipelaying activities, will temporarily decrease the air quality in the area due to dust and

vehicle emissions. It will increase the pollutant concentrations in the ambient air quality during this time. It

will also cause minor and temporary changes in the landform and will cause temporary disturbances in

the community which will continue until the completion of the pipelaying activities.

The construction of the 90 square meter collector chamber will also cause temporary

disturbances in the aquatic biota that may thrive in the water body. Water quality may also decrease

during construction phase due to the introduction of debris in the water as a result of the construction of

the collection chamber. Run-off from disturbed areas and road surface during earth preparations may

contaminated catch basins and affect the water quality.

There are no significant settlements in the project study area. However, relocation of inhabitants

in the upstream of the source had been requested from the barangay officials in order to ensure the water

quality of the source which will be a source for drinking water for the barangay. Job opportunities will

increase as 50% of the manpower requirements for this project will be taken from barangay Vitali. During

the operation and maintenance phase of the project, locales will be preferred to operate and secure the

facilities. Forest guards will be employed to secure the area from illegal loggers since forest management

will be turned-over or co-managed by the Watershed Section of the proponent.


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5. Summary of Environmental Monitoring Plan

The Environmental Monitoring Plan for this project included monitoring activities commencing

from the planning stage of this project and shall continue during operation and maintenance thereof.

First hand data were gathered during the initial inspection determining the terrain of the project

site, soil characteristics, conducting interview with settlers and local officials, taking water sample forlaboratory analysis, conducted volumetric measurements of the water source, took pictures of the project

sites and taking other relevant data that would be necessary for project preparation and designing

environmental management plan.

Data gathered were assessed for project feasibility and assessment of possible environmental

impacts should implementation ensue. These were compared against literature on similar projects

implemented to further assess and identify expected environmental impacts and to develop measures to

mitigate the same.

Baseline data gathered during project preparation stage will compared if there has been

significant changes that occurred in the different phases of project implementation. Mitigation measures

will be applied in the different phases of the project implementation where there are expected adverseenvironmental impacts particularly in the increase of dust and other air pollutants dispersed into the

ambient atmosphere as a result of the earth works in preparation for pipelaying. Mitigation measures will

be applied in order that pollution of the water bodies may be avoided.


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DRAFT MAIN IEER

1. BASIC PROJECT INFORMATION

1.1 Project Name : Proposed Vitali Spring Source Development Project1.2 Location/Address : Sitio Kamalik, Barangay Vitali, Zamboanga City, Region IX

1.3 Nature of Project : Water System (Construction of Collection Chamber, Pipelaying

and Construction of Concrete Ground Tank)

1.4 Threshold Limits

Applied for : Water Pipelines


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Figure 1. Organizational Structure of the Zamboanga City Water District

The Zamboanga City Water Districts mission is to provide adequate and sustainable supply of potable

water, sewerage and related services in accordance with International Standards to all customers within

its service area with the end in view of improving their quality of life anchored on our firm adherence to

the belief that Agua es Vida(Water is Life). With this end in view, it will continuously strive to make these

services available to the general majority, if not the whole, of the population of Zamboanga City.


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The Zamboanga City Water District also believes in the need commits to actively collaborate with

all its stakeholders in the protection and preservation of the Pasonanca Watershed and other watersheds .

1.8 IEE Report Preparer : Anne Aubrey R. De Guzman-Bugtong

1.9 Address : Planning & Design Division, Engineering Department

ZCWD Field Office, Old ReservoirScout Limbaga St., Pasonanca

Zamboanga City,Tel. No. 955-4235


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2.0 DESCRIPTION OF THE PROJECTS IEE PROCESS

2.1. IEE Team

For this project, the IEE Team was composed of the preparer, personnel from the Planning &

Design Division, Construction Division and the Environment and Watershed Protection Division.

Personnel from the Planning and Design Division were principally involved in the Project

Conceptualization, preparation of the pre-feasibility and feasibility studies and the preparation of the

detailed engineering plans and design. At these preparatory stages, initial environmental screening and

assessments have been made before the preparation of the detailed engineering plans and design for the

project wherein the same was considered and the results incorporated. Site selection, environmental

screening and the initial assessment and scoping were performed by the preparer together with the

Planning and Design Division and the Environmental and Watershed Protection Division.

Detailed assessment, identification of mitigation needs and the preparation of the detailed design

of the mitigation measures were prepared by the Environmental Engineer/preparer with aid from the

Planning & Design Division as to the expected activities during the implementation and construction

phase of the project.

The Construction Division shall be responsible in the implementation of the mitigation measures

that have been designed by the Environmental Engineer/preparer. Monitoring, validation and

Evaluation/Audit of Environmental Compliance and Over-all Performance shall be made by the

Environmental Engineer/preparer.

2.2 IEE Study Schedule

Generally the conduct of the Initial Environmental Examination was made during the

conceptualization stage and the preparation of the detailed engineering and design of the project. On July

6, 2011, source verification was conducted by the Planning & Design Division with representation from

the Watershed Protection Section. This first site inspection was conducted on a rainy season but this

particular day was sunny to cloudy. This was conducted after information from the Barangay Chairperson

of Vitali that there are several spring sources that may be developed into a water system that could

supply water to the barangay. At this time, prospective site was identified, data were gathered and initial

environmental screening, assessment and scoping was done.

During the conduct of the topographic survey, which was done two (2) weeks following the initial

inspection, the different elevations have been identified, and the location for the concrete ground tank

was chosen. Additional data have been gathered, such as land use of the chosen site, its ownership and

land classification. These were later on verified with the DENR-CENRO East.

A second inspection was conducted particularly to identify the site for the construction of the ground

tank and to verify the discharge flow of the source. Photographs were taken of the different areas that will

be affected and utilized by this project. This was conducted on September 29, 2011.

On October 13, 2011 barangay referral was conducted together with the affected settlers in the area

particularly those having claims over the surface water and using the same for domestic use. It was

agreed during the said meeting that they are amenable to this introduction of improvement provided that

they would still be able to use this source for their domestic needs. They were assured by ZCWD that

they would still be able to utilize the downstream or the overflow of this source.


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Figure 2. Road Network Map of the Proposed Source Development at Kamalik, Vitali, Zamboanga City

Study area for the

surface watersource

Study area for

the ground tank


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2.3. IEE Study Area

The study area for this proposed project includes the 100 meter radius from the surface water

source. It also includes the unexplored upstream of the source which shall be included in the protection

and forest management during the operation and maintenance phase of the project. This also includes

the ambient environment of the surface water that will be the source for this water system. It is particularly

located at N 7 24' 24.6" E 122 15' 34.7" at an elevation of 160.51 meters above sea level (MASL).

The whole expanse of the 4.824 kilometres where pipelines will be laid was also part of the study

area. Especially so that it will be along these areas where decrease in the air quality will be anticipated

owing to the earth preparation activities that will be conducted which will generate dusts.

The project site for the concrete ground tank has also been part of the study area and is located

607.5 meters from the source collection chamber at an elevation of 108.82 MASL.

Referring to figure 2 which shows the road network map of the proposed project, the study areas

for the surface water source and the concrete ground tank were highlighted by the green circles. The

whole expanse of the pipelines where pipelaying works will be done is also part of the study area of this

project.

2.1 IEE Methodology

The initial environmental examination for this project was conducted by determining the different

pollution generating activities in the project and comparing it against previous projects undertaken and the

environmental impacts it posed, owing to time constraints and the lack of information, and the nature of

the project to be undertaken.

Generally, data gathered were first hand taking the same from the site. Water sample was taken

and subjected to laboratory analysis to determine water quality. Second hand data were taken from

appropriate offices having possession of them particularly as to the land use and classification of the

proposed project area.

After baseline data from the project site/study area have been gathered, the same was util ized to

predict the possible impact of the project to the ambient environment. Assessment of the possible

environmental impacts in the project site was based on previous projects undertaken by ZCWD with

similar component activities. Possible environmental impacts were determined in relation to the pre-

construction, construction/development, operation and maintenance stages of the project. As determined

therein, these components were compared to the proposed project, its location, the baseline

characteristics of the project site and the degree of the environmental impact that these activities may

produce.

Review of related literature was also used to aid in the assessment of the possible impacts that

the works involved in this proposed project may cause to the ambient environment of the project

site/study area.


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3. PROJECT DESCRIPTION

3.1. Project Location, Area, ECA category

Barangay Vitali is situated some 73 kilometers east of the City Hall of Zamboanga. It has an

approximate land area of 5,409 hectares and a total population of 10,500. It is bounded by barangays

Mangusu and Tictapul. Sitio Kamalik is situated at approximately 4 kilometers from the TamionProduction Well.

It is considered, for the purpose of environmental impact assessment, as an environmentally

critical area as it belongs under Category No. 10 (water bodies categorized by one or any combination of

the following conditions: tapped for domestic purposes; within the controlled and/or protected areas

declared by appropriate authorities; which supports wildlife and fishery activities). In this case, the surface

water utilized is being tapped for domestic purposes by settlers within the vicinity of the area. This source

is located at geographical coordinates N 7 24' 24.6" E 122 15' 34.7".

3.2. Project Rationale

Water is a basic human need that must be addressed with urgency. The people from this

barangay have been clamouring for a sustainable potable water supply for several years now. Before, a

barangay water works system has been operating in the barangay to supply water. But this has been

unsustainable and the local folks could not manage and maintain the same. When this issue was raised

to the local government for rehabilitation and improvement, the mayor required that the same be turned

over to the Zamboanga City Water District to ensure its management and maintenance. As an answer to

this clamour, ZCWD, together with the City Government and

This project, the Proposed Source Development at Kamalik, Vitali, was conceptualized as an

alternative to the previous Vitali Water System which included pipelaying works along the main road of

barangay Vitali and the construction of the Tamion Production Well. This project was constructed as a

thrust of the City Mayor, Celso L. Lobregat, to provide water supply systems to waterless barangays in

the city. Thus, the realization of this project in 2008. However, it has never been operational because ofthe change in the water quality discharged by the Tamion Production Well. For this reason, ZCWD is

studying the possibility of applying treatment procedures that would address the water quality problem of

this production well.

In the meantime, the water supply requirements of this barangay must be addressed with urgency

as water is a basic requirement for life sustenance. Thus, surface water sources have been explored in

the area as there are existing surface water bodies in the area which are presently being tapped by

nearby settlers for domestic use. The question only remained is whether the same is capable of supplying

the needs of majority, if not all, of the barangays constituents. Hydraulic analysis was conducted and it

was determined that the source would be capable of supplying potable water for the present demand.

However, should this increase, other sources have already been identified to augment the supply.

This project, Proposed Source Development at Kamalik, Vitali, Zamboanga City, involves 2 civil

works (construction of 90 m3

concrete ground tank and the construction of 4.8 m3

capacity source

collection box) and a 4.824 kilometer pipelaying works (3,194 linear meters 110 mm x 6.00 m PVC

pipelines. Class 150, 1,630 linear meters 6.02 mm thick x 100 mm (I.D.) G.I. Pipeline (Schedule 40.)).

This specified length of pipelines will be interconnected with the existing Vitali Water System Pipeline at

Tamion Road in Vitali.


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The source that will be utilized for this proposed water system is the Kamalik Spring which has a

flow of 4.08 liters per second (64.68 gallons per minute) and is situated some 5 kilometers from the

existing Tamion Production Well, 321 true North of the entrance to Tamion from the national highway,

and 329 true North of the Tamion Production Well. Thence, it shall be connected to the 1,630 linear

meters of 100 mm G.I. Pipeline and the 608 linear meters of 110 mm PVC Pipeline and water will be

stored on a 90 cubic meter ground tank located 1771 metres from the source at an elevation of 125

meters above sea level (3 meters). Chlorination of the water will be made at the ground tank before

distribution. The ground tank will be interconnected to the existing Vitali Water System Pipeline by the

2586 linear meters 100 mm PVC pipe.

This proposed water system has a total budget cost of ten million five hundred fifty-six thousand two

hundred ninety-five pesos and 10/100 (Php 10,556,295.10). The manpower requirement has a total of 62

personnel, which includes 54 laborers, 2 pipefitters, 2 carpenters, 1 welder, 2 steelman, and 2 mason,

excluding the Project Engineer. It is expected to be completed in 135 days. It shall commence as soon as

all permits have been acquired, including the issuance of the Environmental Compliance Certificate

(ECC), and upon acquisition of the land where the proposed ground tank shall be constructed shall have

been completed.

3.3. Project Development Plan, Process/Technology and Project Components

Figure 2 above shows the development plan for this project. Three major activities will form part

of this project. The project shall begin at the water source which is located 4.8 kilometers from the

existing Tamion Production Well. A 4.8 cubic meter concrete spring collector chamber will be constructed

at the water source that will serve as a reservoir for this water system. This spring collector chamber will

be connected to the 100 mm Galvanized Iron (G.I.) Pipe where the pipelaying activities of this project

will begin. The pipelaying activities is composed of 1,630 linear meters of 6.02 mm thick x 100 mm

(I.D.) G.I. pipeline and interconnected with the 110 mm x 6.00 m PVC pipe 608 linear meters in length.

Then it will be connected with the 90 cubic meter concrete ground tank. From the ground tank it will be

connected with the PVC pipe at 2,586 linear meters length to the existing Vitali Water System at the

Tamion Production Well.

Pipelaying

Mobilization and hauling of materials will take 30 days and will require the use of 2 units boom

truck to transport the materials to the project site. The pipelaying activity will require the use of backhoe

for the excavation works, welding machine and bar cutter. Concrete pipe support will be placed at every 3

meters interval for the G.I. pipes and before interconnection to the PVC pipe. Along the pipeline network,

the following appurtenances will be installed: 5 units of 75 mm residential type fire hydrant and

barricades at 500 linear meters interval; 4 units of blow-off assembly at lowest elevations along the

pipeline(this requires the use welding machine); and 8 units of air-release assembly and barricade at

highest elevations along the pipeline. At culverts and creek crossing of the G.I. pipes, welding machines

will be used. Upon completion of the pipelaying works, the area where pipelines have been laid will be

backfilled but not tampered in order that necessary repairs and amendments may still be made after

conducting the hydrostatic test. Hydro testing will be performed where the pipes will be subjected to

hydrostatic pressure of up to 150 psi for one (1) hour. This is done to expose defective materials that

have missed prior detection, ensure that any remaining defects are insignificant enough to allow

operation at design pressures, expose possible leaks and serve as a final validation of the integrity of the

constructed system. This activity requires the use of a water tanker and a hydrotesting

machine. Disinfection of the pipelines will be conducted to ensure that these are free from contaminants

and bacteria that could affect the potability of the water being distributed. This is done by flushing 114


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cubic meters of potable water mixed with 3 kilograms of calcium hypochlorite into the pipelines.

Thereafter, final backfilling and compaction of the earth where the pipes have been laid will be conducted

using a tamper hammer machine.

Construction of 90 cubic meter Concrete Ground Tank

Excavation equivalent to 51 cubic meters in preparation for the construction of the concreteground tank will require the use of a backhoe that will be used for the excavation works and a 1 horse

power water pump that will be used to pump out water from the excavated earth. A 100 mm full bore

electromagnetic flowmeter flange type, with two (2) mating flanges and with wall mounted type signal

converter complete with accessories will be installed in this concrete ground tank before the PVC pipe

distribution line. The construction of this concrete ground tank will utilize 4 units of concrete bagger mixer

and 2 units of concrete vibrator. 1 unit welding machine and 1 unit angular grinder will be used for welding

the steel ladder and manhole cover of the ground tank. The same welding machine will also be used for

the installation of valves and appurtenances and the interconnection works. After concrete curing of 28

days, the newly constructed ground tank will be disinfected and subject to leakage test. Disinfection will

be done by flushing 105 cubic meters of potable water with dissolved 8 kilograms calcium hypochlorite.

Detecting leaks in the newly constructed tank will be by volumetric testing which is detected based on the

measured change in volume of the water stored in the tank within 24 hours.

Construction of 4.8 cubic meter Concrete Spring Collector Chamber

The construction and interconnection of the spring concrete collector chamber will use 1 unit of

welding machine, 1 unit concrete bagger mixer and 1 unit of concrete vibrator. After a curing period of 28

days, disinfection of the spring concrete collector chamber will be done by introducing 35 cubic meters of

potable water mixed with 1 kilogram calcium hypochlorite.

3.4. Description of Project Phases (Activities/Environmental Aspects, Associated Wastes and

Built-in Pollution Control Measures)

3.4.1. Pre-construction/ Pre-operational phase

The different activities involved during the pre-construction phase of this proposed project

include project conceptualization, pre-feasibility and feasibility studies and the preparation of the

detailed engineering plans and design.

Consultations with the barangay officials and the residents have been conducted. It was

during these meetings that possible sources have been identified. These sources have been

verified and evaluated. Water samples have been taken for laboratory analysis at different dates

of inspection.

Survey has also been conducted from the water source to the road network where the

pipelines will pass including the proposed project site for the constructed concrete ground tank. In

these rural areas it is a common misconception that whenever topographic surveying activities

are conducted in the area, their properties will be taken from them allegedly taking advantage of

their illiteracy and poverty. However, during these surveying activities the residents have been

forewarned by the local officials in the barangay that the surveying team of the Zamboanga City

Water District will be conducting topographic survey and that they have been ensured that their

properties will not be prejudiced along the way.


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Following the identification of the most ideal site for the construction of the concrete

ground tank, the site development plan and sketch plan of this site is endorsed to the Lot

Acquisition Committee for appropriate action. The Administration and General Services

Department of this office shall then be responsible in processing the application for Water Rights

with the National Water Resources Board and the application for land use with the CENRO-East.

Assessment of improvements introduced by the residents in the area will be made after an

evaluation by the CENRO-East office as to the land classification of this area and after a

determination of their rights therein.

The possible pollutants introduced into the environment during these pre-construction

activities include emissions from the vehicles used by the team. The regular emission testing of

these vehicles however assures that the emissions from the vehicles are within the standards set

by the Clean Air Act.

Also, solid wastes may be generated during these activities because of the food packs

and plastic water bottle that were brought by the team. This was mitigated by requiring each

member of the team to keep their trash with them until return to the office for proper disposal.

3.4.2. Construction/Development phase

Construction and Development Phase commences with the mobilization and the hauling

of materials from ZCWD motorpool to the project site at Vitali. This activity is expected to affect

ambient air quality due to entrained dust from materials delivery trucks travelling on unpaved road

and the loading and unloading operations of aggregates and soil. Earth preparation activities

would also affect air quality as a result of increase in entrained dust in the atmosphere as well as

exhausts from the Diesel construction equipments used for site preparation, grading and

excavation. Wind erosion of areas disturbed during construction activities would also affect air

quality as well as emissions from transportations used by workers to commute to construction

site. In order to mitigate adverse effects, settling of dust will occur over time and by water flushing

of unpaved road for a particular interval of time to reduce entrained dusts in the atmosphere and

to remove build up of loose materials to control dust emissions. All trucks hauling soil, sand and

other loose materials will be covered or require them to maintain at least two feet of freeboard.

Traffic speeds will be maintained at 40kph on unpaved surfaces.

Pipelaying works including operation of heavy equipments and other construction

equipments including hydrotesting and disinfection works of pipes and source box and ground

tank, installation of valves and fittings and the interconnection works, as well as the installation of

five (5) units of 75 mm fire hydrants and barricade and the installation of four (4) units of blow-

off assembly also have its environmental impacts in the project site. These activities will entail

generation of solid wastes of at least 5% of the total bulk of materials used for the entire project

including but not limited to used bags of cement, empty paint cans, wood cuttings used for

scaffolding of concrete, excess fill materials from grading and excavation activities, scrap woods

and metals, and small concrete spills. It is also expected to generate a negligible volume of litter

to include food containers, beverage cans, paper bags, plastic wrappers, and smoking materials,

including materials generated by the public. Adverse effects will be mitigated by prevention on

site through segregation of wastes according to recyclables, re-usable and non re-

usable/recyclable. These wastes will be gathered at a temporary facility on site. Non-recyclable/re

usable will be disposed of appropriately after a classification is made whether they are

toxic/hazardous or non-toxic/harzardous.


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The use of construction equipments during this phase is expected to affect air quality due

to their engine exhausts. Emissions from motor vehicles also contribute to these adverse effects

to the air quality. Entrained dusts from earth preparation works, vehicles travelling on unpaved

roads and the exhausts of these vehicles also contribute to air pollution. Exhaust from the diesel

construction equipment used for site preparation, grading, excavation, and construction site of

source collection box and concrete ground tank as well as the exhaust from diesel-powered

electric generators, air compressors, water pumps may affect the ambient air quality at the project

site.

Sprinkling of water will be done at every identified interval to reduce entrained dusts in

the atmosphere. Operational measures will also be maintained such as limiting engine idling time

and shutting down the equipment when not in use in order to mitigate its adverse effects to the air

quality. Regular preventive measures will also be made to prevent emission increases due to

engine use. It will also be ensured that low-emitting Diesel engines must meet the standards set

by the Philippine Clean Air Act (PCAA).

During the construction phase of the project, noise levels are also expected to increase

due to the use of heavy equipments such as backhoe, dump truck, welding machine, bar cutter,

hydrotesting machine and tamper hammer. Considering that the project area is mostly composed

vast open spaces which in itself is a natural noise barrier, including the vegetation which

surrounds the spring source where a collection box will be constructed, its adverse effects to the

community in the area is mitigated thereby. Operators of these heavy equipments are advised to

use earplugs to mitigate the level of sound they receive to save their hearing.

Since this project involves the use of an existing water body, it is expected that during the

construction of the source collection box and its interconnection with the 100 mm G.I. pipe will

decrease its water quality accountable to the temporary disturbances due to the construction

activities or the introduction of wastewater from disinfection works which may increase turbidity

levels and temporary alter the chemical characteristics of the water body concerned. Regular

monitoring of the water body will be conducted throughout the construction duration either by

taking water samples and bringing the same to the laboratory for analysis or by conducting onsite

physical/chemical testing of the concerned water body. Baseline data has been gathered prior to

the construction thereat. Cement preparation will be made several meters away from the creek to

avoid contamination of the water body and to allow natural treatment of the creek before

resumption of domestic use.

3.4.3. Operational phase

During the operation of the Vitali Water System, which will supply water to some 3,205

population of Vitali. Regular maintenance activities at the source box will affect the water quality

of the creek on which it is constructed. By allowing the creek to flow freely thus flushing down

sediments and biosolids that formed in the collection box will naturally treat the water body which

allows domestic use of its downstream.

3.4.4. Abandonment phase

Overtime, the natural wear and tear of the pipelines will take its toll thereby requiring the

district to replace the old ones. These old pipelines will be taken back to the ZCWD motorpool for

appropriate disposal or brought to recycling firms with respect to G.I. pipes and sanitary disposal

with respect to the PVC pipes.


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3.5. Manpower Requirements

This project has a total of 64 personnel which includes (1) project engineer, (1) driver, (54)

labourers, (2) pipefitters, (2) carpenters, (1) welder, (2) steelman, and (1) mason. 50% of these manpower

requirements will be taken from the local area, except for the skilled labor required for this project.

3.6. Project Cost

This project has a total project cost ofTEN MILLION FIVE HUNDRED FIFTY-SIX THOUSAND

TWO HUNDRED NINETY-FIVE and 10/100 (Php 10,556,295.10).

3.7. Project Duration and Schedule

This project shall commence immediately upon its approval and is expected to be completed

within one hundred thirty-five (135) working days.

ITEM WORK ITEM/DESCRIPTION Target Duration From To

I PIPELINES

A MOBILIZATION/HAULING & STAKING WORKS

1 Mobilization 5 days 03/01/12 03/05/12

2 Hauling of Materials 30 days 03/01/12 03/30/12

3 Final Staking/ Lay-outing/ Line & Grade 30 days 03/06/12 04/04/12

B Pipelaying Works

1 Pipelaying

20

pipes/day 64 days 03/06/12 05/08/12

2 Valves/Fittings & Inter-connection Works 2 days 04/05/12 04/06/12

3 Culvert & Creek Crossing 8 days 03/30/12 04/06/12

4 Installation of Five (5) units - 75mm Fire 1 unit/day 5 days 04/07/12 04/11/12

Hydrants & Barricade

5 Installation of Four (4) units Blow-off Assembly 2 units/day 8 days 04/12/12 04/19/12

6 Installation of Eight (8) units Air-Release 5 days 05/06/12 05/10/12

Assembly & Barricade

7 Disinfection/ Hydrotesting of Pipelines 6 days 04/07/12 04/12/12

8 Final Backfilling & Compaction

18

cu.m./day 64 days 03/06/12 05/08/12


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4. BASELINE ENVIRONMENTAL CONDITIONS, IMPACT ASSESSMENT AND MITIGATION

4.1. The Land (Land use, Pedology, Geology, Geomorphology, Terrestrial biology)

The general soil classification at the project site is classified by the Bureau of Soils as Antipolo.

This soil type covers 3484.22 hectares of Barangay Vitali.

The soil characteristic surrounding the source was mostly compacted clay loam. But the river bed

is sandy with large rocks and surrounded with trees mostly composed of rubber, mango, lawaan,

bamboos and other varieties of flora. This extends to the head source of the spring which is sparsely

vegetated by various trees, including fruit bearing ones, shrubs and grasses. Only light structures may be

found within the vicinity to include houses made of native materials which are considerably distant from

one to the next, the nearest of which structure to the source is a house located approximately 700 meters

to the spring source, and a chapel. An elementary school is found approximately 4 kilometers from the

spring source. The Tamion Production Well of ZCWD is located approximately 5 kilometers from the

source.

In a joint inspection by the Planning and Design Division, with representation from the

Construction Division of this agency, together the Land Evaluation Party of the City Environment andNatural Resources Office-East of the Department of Environment and Natural Resources, the proposed

water source and the whole 3 hectare expanse area to which a Special Land Use was applied for, was

classified as a Timberland. Subsequently, an inventory of forest resources will be conducted in this area.

The land cover for most hectares, including the proposed project site for pipelaying works and the

most parts of the project site are grasslands/savannahs and open areas mixed with shrubs, with isolated

portions used for local agriculture. The entire barangay of Vitali has a total land area of 4,013.18 hectares

grasslands with mixed shrubs including the area where the proposed concrete ground tank will be

constructed.

The terrain in the study area (around the project site for the source collector chamber and the

project site for the concrete ground tank) is generally mountainous with an estimated slope of 65% fromthe project site of the proposed ground tank, while the slope from the source is estimated at 79% slope.

The Slope Map for Barangay Vitali as prepared by the City Planning and Development Office (CPDO) has

classified the 2,245.75 hectares of the said barangay to have a slope at 50% and above, including the

areas for the proposed project sites.

5,069.37 hectares of the barangay was identified to be prone to severe erosion according the

Erosion Map of the barangay sa prepared by CPDO. However, the area where the proposed ground tank

will be constructed is within the 2,083.02 hectares that have been classified as susceptible to moderate

erosion.

An application for Special Land Use has already been submitted by the proponent for the use of

this area for this proposed project. Only upon the issuance of the aforementioned permit shall this projectensue.

4.2. The Water (Discuss only relevant modules or modules likely to be affected by project impacts

Hydrology, Oceanography, Water Quality, Freshwater Biology, Marine Biology

The water body that will be utilized for the development of this water system is a spring in Sitio

Kamaliksituated within a piece of land classified as Timberland. It has yield of 4.08 liters per second or

64.68 gallons per minute and is the source of water for the nearby inhabitants in the area, approximately


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for 7 households. The water in this spring is of drinking water quality after it has been subjected to

physical and chemical laboratory analysis. (water quality result) A bamboo-made flume was used by

nearby residents to convey water where locals would bring their plastic containers to gather water needed

for daily consumption. It is used for their daily household particularly for drinking. Nearby streams and

creeks were used for bathing, washing and gardening.

Another ground resurgence classified as a 6th magnitude spring which is utilized by residents asource of drinking water was also found some 740 meters from proposed site where a small impounding

facility will be constructed. However, this was not considered for development because of its insufficient

yield which was at 5.27 gallons per minute only. The physical and chemical characteristics of the water

sample taken from this latter spring has passed the national standards for drinking water quality.

An application for Water Rights over this water source has been applied for by the proponent in

relation to this proposed project with the National Water Resources Board.

4.3. The Air - ((Discuss only relevant modules or modules likely to be affected by project impacts -

Meteorology, Air Quality, Noise

Despite the deficiency of sufficient forest cover, the ambient air quality is excellent in the areaconsidering the absence of point and non-point air pollutant sources in the area owing to its strategic

location and the absence of traffic congestion and industrial facilities.

Noise levels range from 20-50 decibels which could be attributed only to ordinary man-made and

animal-made sounds.

4.4. The People

Residents living nearby the source and within the vicinity of the study area are generally engaged

in agricultural activities for consumption. There were more or less 40 families residing within the study

area. But there were less than 10 families within the immediate (within 10-15 meter radius) vicinity of the

source. Mostly are engaged in latex harvesting in the surrounding rubber plantation in the area.

The locales within the vicinity of the proposed project site, particularly those which have been

found residing within what was identified by CENRO-East as timberland, claim to be in occupation of the

land but without possession of any tenurial instruments which may have been issued by the State. The

following are the heads of households residing within the 3-hectare timberland land area which the

proponent have applied for Special Land Use:

1. Pedro Legazpi

2. Edwin Legazpi

3. Joel Fernando

4. Leonardo Carpio

5. Gilbert Fernando

Land ownership of the project site where the proposed ground tank will be considered is covered

by TCT No. T-58, 051 in the name of Cecinio Danlag married to Caridad Esperat for an area of 41,315

square meters. For the purpose of this project, the proponent will be negotiating for the acquisition of 200

square meters out of this area for the construction of the concrete ground tank.


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5. ENVIRONMENTAL MANAGEMENT PLAN

5.1. Impacts Management Plan

Impacts mitigation strategies are mostly incorporated in the different activities involved in this

project. At the pre-construction stage, which is mostly composed of data gathering activities, impacts

prevention are made. During the site/source verification, activities were limited at the water bodies inorder to mitigate impacts to water quality. Solid wastes generated during said activities were gathered for

disposal at the garbage bins at the office. At this stage, proper coordination with the barangay council had

already been made in order not to surprise locals and generate unnecessary anxiety of displacement

from their respective properties. Information dissemination were made by local authorities in order to

appease them of the succeeding activities. This was done before the topographic survey of the project

site. Proper acquisition proceedings have been conducted by the Lot Acquisition Committee of this office

with respect to properties that need to be acquired in relation to this project. Constant visits to the project

site required transportation. In this case, regular preventive maintenance were made on vehicles used to

prevent emission increases due to engine. Low sulphur and low aromatic fuel meeting the standards set

for motor vehicles by the Philippine Clean Air Act (PCAA) were used, as well as low-emitting Diesel

engines which meets the standards of PCAA.

An expected decrease in ambient air quality will be brought about by the mobilization and hauling

of materials during the construction phase of this project. Water flushing will be made of unpaved road at

every predetermined interval depending upon the degree of fugitive dust caused by material delivery

trucks to reduce entrained dusts in the atmosphere and to remove build up of loose materials. All trucks

hauling soil, sand and other loose materials will covered or at least required them to maintain at least two

(2) feet of freeboard. Also, traffic speeds will be limited at 40 kph at unpaved roads. Final

staking/layouting/line and grade activities are also expected to affect ambient air quality. Entrained dusts

are expected to be generated during site preparation and grading/excavation at the construction site. The

same effects will be generated during onsite travel on unpaved surfaces. Thus, water flushing will be

made in order to avoid build up of entrained dusts. Exhaust from the Diesel-fuelled construction

equipments used for site preparation, grading, and excavation. In order that its adverse effects to air

quality, operational measures such as, limiting of engine idling time and shutting down equipment when

not in use, will be made. Regular preventive maintenance will also be made to prevent emission

increases due to engine problems. Water application or chemical dust suppressants will be applied or

sprayed to control dust emissions from unpaved surface and unpaved parking areas. The same effects

will be generated by the pipelaying works including the operation of heavy equipments and other

construction equipments, including hydrotesting and disinfection works, installation of valves/fittings and

interconnection works; installation of five (5) units of 75 mm fire hydrants and barricade; installation of

four (4) unit blow-off assembly are also expected to cause decrease in the ambient air quality at the

project site, particularly, the use of construction equipments, motor vehicles, and brake and tire wear.

Thus, the same mitigation measures which are applicable will be practiced for these activities at the

construction phase of this project.

In general, the solid waste generated during the implementation of this project will be managed

through site prevention, segregation of waste according to its classification as to recyclables, re-usables

and non re-usables/recyclables. These will be gathered at a temporary facility where only those classified

as non-reusables/recyclables will be disposed of after further classification as to toxic/hazardous or non-

toxic/non-hazardous, in which case appropriate disposal will be made.

It is expected that during the construction phase of this project noise levels in the project site will

increase due to use of heavy construction equipments. However, the strategic locations of the project site


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versus the location of nearby communities are significant enough to act as noise barriers. Machine

operators will also be advised to use ear plugs to avoid damage to their hearing.

Nearby creeks and other water bodies in the area will suffer a temporary decrease in water

quality due to disturbances that may be caused by the construction activities particularly during the

construction of source box and pipe supports and creek crossings. Regular monitoring of these water

bodies will be made by taking water samples to the laboratory for analysis to ensure its quality. Cementpreparation will be made some distance from the creek, approximately 10-20 meters away, to avoid

contamination of water bodies from cement leachate.

5.2. Environmental Monitoring Plan

Generally, the environmental monitoring plan for this project will involve mitigation and control

measures in order to avert and assuage the adverse effects to the environment at the project site that

may be caused by this undertaking.

Because of financial limitations and the nature and degree of the impacts to the environment of

this water system project, sampling and measurement plans are limited to the conventional methods such

as random sampling for solid wastes and use of calibrated waste receptacle for measuring the volume ofsolid waste generated; volumetric method of measuring the flow of wastewater used for hydrotesting and

disinfection works.

5.3. Institutional Plan for EMP Implementation

At present, ZCWD is still in the process of developing its institutional plan for EMP

Implementation. As soon as this will be completed, it will be incorporated in the preparation of EMP for

future projects and adapted in its future undertakings.

IEER Vitali

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