Metropolitan Waterworks and Sewerage SystemManila Water Company, Inc.

E94Volume 18

Initial Environmental Examination

of the

Community Sanitation ProjectManila Second Sewerage Project

IBRD 4019

Project No. 16Karangalan Village

Pasig City

Prepared by:

Manila Water Company, Inc.489 Katipunan Rd, Balara, Quezon City

December 2001

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TABLE OF CONTENTS

PAGE NO.

Executive Summary 7

1.0 PROJECT DESCRIPTION

1.1 BASIC PROJECT INFORMATION 13

1.2 PROJECT LOCATION 13

1.3 PROJECT RATIONALE 15

1.4DESCRIPTION OF PROJECT PHASES

1 .4.1 Pre-Operational/Construction Phase

1.4.1.1 Construction Plan 16

1.4.1.2 Total Surface Development Block 16

1.4.1.3 Estimate Total Area to be opened for Civil Works 16

1.4.1.4 Major Openings and Construction Activities 18

1.4.1.5 Types of Equipment to be Used 19

1-.4.1.6 Source of Construction Materials and Facilities 19

1.4.1.7 Support Services and Facilities Requirements and

Availability 20

1.4.1.8 Estimate of Total Cut Soil Volume 20

1.4.1.9 Total Manpower Requirement 20

1.4.2 Operational Phase

1.4.2.1 Project Operation Schedule and Duration 21

1.4.2.2 Process Technology and Activities 21

1.4.2.3 Waste Production Scheme 22

1.4.2.4 Manpower Requirement 24

1.4.3 Abandonment Phase 24

2.0 BASELINE ENVIRONMENTAL CONDITIONS

2.1 STUDY METHODOLOGY

2.2LAND 25

2.2.1 Land Resource Utilization 25

2

2.2.2 Physiography and Geology 25

2.2.3 Vegetation and Wildlife 25

2.2.4 Land Acquisition Assessment 31

2.3 WATER

2.3.1 Inventory of Water Bodies 31

2.3.2 Water Quality (Surface/Ground) 31

2.4AIR 32

2.5 PEOPLE

2.5.1 Population/Beneficiary 32

2.5.2 Project Affected Persons 32

3.0 ALTERNATIVES 32

4.0 IMPACT ASSESSMENT

4.1 IMPACT IDENTIFICATION

4.1.1 Impacts During Construction Phase 34

4.1.2 Impact During Operation Phase 45

4.21MPACT PREDICTION AND EVALUATION 47

4.3UNAVOIDABLE AND RESIDUAL IMPACTS 48

5.0 ENVIRONMENTAL MANAGEMENT PLAN

5.1 IMPACTS MITIGATION / ENHANCEMENT PLAN 48

5.2 ENVIRONMENTAL MONITORING ACTION PLAN 53

6.0 COMMUNITY CONSULTATION PROCESS 54

LIST OF FIGURES

. ;e . ;e_,5

1 Location Map of Karangalan Village 14

2 Proposed Implementation Schedule 17

3 General Treatment Process Scheme 23

4 Photographs of STP Sites 26-29

5 j Location Map of STP Sites 35-44

LIST OF TABLES

1 Analysis of Septic Tank Effluent Quality 15

2 Land Requirement for STPs 18

3 Design Capacities of STPs 18

4 Estimates of Soil Excavation Volumes 20

5 Influent Flow Characteristics 21

6 DENR Effluent Parameters for Class C Waters 22

7 Vegetative Cover 30

8 Sources and List of Potential Environmental 33Impacts

9 Typical Noise Emissions of Construction 45Equipment at Various Distances from Source indB(A)

10 Sludge Production of Various Wastewater 46Treatment Processes

11 Summary of Assessment of Environmental Issues 47/ Impacts

12 Environmental Management Plan 48

13 Environmental Monitoring Action Plan 53

14 Institutional Monitoring 54

5

LIST OF ANNEXES

1 Manila Water Company STARRT Card for Monitoring

Construction Works

2 Wastewater Quality Monitoring Schedule

3 Environmental Compliance Certificate (ECC) NCR-2000-02-

19-0289-211

4 Manila Water PCO Report Format

5 Sample Monitoring Sheet for Effluent Quality

6 Endorsements from the Barangay Captains

7 1994 Memorandum of Agreement between NHA and MWSS

6

EXECUTIVE SUMMARY

The proposed project for Karangalan Village is a sub-project of the CommunitySanitation Project, which is a component of the World Bank-assisted ManilaSecond Sewerage Project (MSSP).

The project is intended to reduce the current wastewater pollution discharged tothe Pasig River by approximately six thousand (6,000) households in KarangalanVillage. The project involves the improvement and rehabilitation of the seweragesystem in the Village. Specifically, the project includes the rehabilitation of theexisting sewer lines and lift stations, installation of new sewer lines to interceptsewage flows from the storm drain, as well as untreated wastewater flows fromindividual septic tanks and households without septic tanks. Sewage treatmentplants (STP) will be constructed to treat the wastewater flows.

In conformity with the requirements of the Department of Environment andNatural Resources (DENR), an Environmental Compliance Certificate (ECC)NCR-2000-02-19-0289-211 issued pursuant to P.D. 1586 was secured for theproject.

1.0 BASELINE ENVIRONMENTAL CONDITIONS

Karangalan Village belongs to the Third Urban Development Project (Urban Ill) ofthe National Housing Authority. Urban IlIl projects were funded through a loansecured in February 1980 by and between the Government of the Philippinesand the International Bank for Reconstruction and Development.

Karangalan Village was developed in 1985 on what used to be rice fields. TheVillage is located along Imelda Avenue. Based on municipal and barangayboundaries, portions of the Village belong to Barangays Manggahan and de laPaz in Pasig City and Barangay San Isidro in Cainta, Rizal. Karangalan Village isdivided into nine phases. Phases IA, IB and IC are on the northwestern sidewhile phases 2A, 2B1, 2B2, 2C1, 2C2 and 2C3 are on the southeastern side.The Village is bounded by Vista Verde Subdivision in the east, Pasig GreenparkSubdivision in the west and Metroville Subdivision in the south. HakbanganCreek bounds the northern portion of the housing area.

The Village is home to an estimated 6,000 households. Included in theestimate/projection are those from the newly constructed medium rise housing(MRH) units. The Karangalan MRH consists of 10 buildings, each with 60residential units.

Floral population within Karangalan Village constitutes ornamental plants and afew trees. Faunal population is limited to household pets and stray animals. Thearea is characterized by a relatively even distribution of precipitation during theyear. Like in most parts of Metro Manila, the community has two distinct seasons:

7

the dry season during the months of November to May and the wet seasonduring the months of June to October.

Existing Sewerage System

The sewerage system serving the estimated 42,000 population of KarangalanVillage is made up of polyvinyl chloride (PVC) and concrete sewer pipes withdiameters ranging from 150-250 millimeters. From each household, wastewaterflows to sewer lines directed to nine (9) separate lift stations. The stations areequipped with pumps that lift wastewater to each of the nine (9) communal septictanks (CST) serving each phase. Presently, the lift stations are non-functional.

The septic tanks are typically designed with approximate dimensions of9mxl 8mx3.5m (LxWxD). The septic tanks consist of a grit chamber, wet well anddigestive chamber. The flow of raw wastewater to the grit chamber is controlledby two sluice gates. The influent is screened by a cast iron bar screen(25mmx30mm) before entry to the wet well. The digestive chamber is made up ofthree compartments. The septic tanks have different disposal points. Thedescription and disposal points of the septic tanks are listed in the table below.

Description of Communal Septic Tanks (CST)CST # Location and (Boundaries) Area Units Discharge

(mi) Served Point1 Block 31 (Kayumanggi/K-1 7/K- 406 846* Hakbangan

18/Karunungan), Phase IA Creek2 Block 63 752 777* sewer

(Kaayusan/Kalayaan/Karunungan), manholePhase 1C

3 Block 84 (Kaayusan/Kabanalan/K- 925 961 Drainage44/K-45), Phase 1 B

4 Block 58 (Kabutihan/Katipiran/K-1 18), 470 945 HakbanganPhase 2A Creek

5 Block 21 230 401 sewer(Kagalingan/Kapatagan/Kaalaman, manholePhase 2B1

6 Block 128 900 318 sewer(Kaunlaran/Kakisigan/Kalakasan/Kasi- manholenupan), Phase 2C1

7 Block 14 759 357 drainage(Kaalaman/Kapayakan/Katiyakan),Phase 2B2

8 Block 61 (Kaluwagan/Katimugan/KC- 447 742 sewer25/KC-21), Phase 2C2 manhole

9 Block 61 (Kaluwagan/Katimugan/KC- 754 588 Drainage125/KC-21), Phase 2C2

*elementary school not counted

8

Settled wastewater from CST #1 flows to a pilot wastewater treatment facility-abiomodule project of the Japan International Cooperation Agency (JICA). Thebiomodule was constructed in -1 U9 1 and is currently operated and maintained byManila Water.

The biomodule has a design flow of 36-150 m3/day. In the biomodule system, themicroorganisms in the activated sludge are stored in a string-type media installedin the aeration tank. Oxygen required for activation of the microorganisms isintroduced by way of aeration pumps.

From the disposal points listed above, all settled/treated wastewater flows toHakbangan Creek which is a tributary of Balante Creek. This water bodyreleases into the Marikina River which ultimately discharges into the Pasig River.During the rainy season, the BOD5 of Pasig River ranges from 3-5 mg/L. Thisloading reaches 7-10 mg/L during dry season. Pasig River water quality fallswithin the BOD5 for Class C waters. DENR Administrative Order 34 (DAO 34)describes Class C water as that suitable for the following:

1. Fishery Water for the propagation and growth of fish and other aquaticresources;

2. Recreational Water Class II (Boating, etc.);3. Industrial Water Supply Class I (For manufacturing processes after

treatment).

Defective lift station pumps, substandard design and materials, and settledwastewater in the sewer lines are indicative of the need to rehabilitate andimprove the existing sewer system.

2.0 ENVIRONMENTAL IMPACTS AND MITIGATING MEASURES

PotentialEnvironmental Mitigating Measures

ImpactCONSTRUCTION PHASE

1. Poor quality of . Manila Water Company will monitor the supply and installationconstruction contract to assure quality of equipment and construction. Site

Managers and Engineers with experience in constructionmanagement shall approve all materials and equipment to beused and installed at the site.

. The contractor will be required to post a performance bond forthe Design and Construction Contract of the sewerage system.

9

2. Air pollution . Efficient construction planning and work scheduling(suspended particulates, . Formulation of appropriate work plans, work scheduling, workodor and fumes, vehicle specifications and work methodologiesemissions eg. CO2, CO . Provision of properly maintained storage area for keepingNOx) stocks of construction materials and equipment

. Prompt and fast removal of excavated materials or dredgesspoils from construction site

. Sprinkling of water on dust-generating mounds of resultingfrom earthmoving activities and civil works.

* Control of motor vehicle emissions. Dust accumulation will also be prevented through proper

washing of the vehicles prior to its departure from the site. Development and enforcement of strict health and safety

pollution control regulations specific for the project site- Good housekeeping of workplace and construction

affected areas- Use of Protective Gear by all workers

3. Water pollution due to . Provide temporary drain systems and storage facilities forwastewater , oil excavation soils, fuel and oils needed for equipmentleakage/spills . Cautious and sensible planning for construction and post-

construction phases of the project. Provision of a routine chemical and oil spill clean-up plan. Formulation of a monitoring program

4. Noise pollution from . Establish temporary sound barriers around the work siteoperation of construction . Proper scheduling and phasing of high-noise activitiesequipment * Use of appropriate mufflers and sound proofing for

construction machinery, equipment and engines. Use of Personnel Protective Equipment by all workers

5. Temporary disruption of . Public information campaign posting schedule of constructiontraffic flow within the * Provision of a liaison officer from the residents of thecompound compound to assist the information dissemination regarding

inevitable changes in schedule of operations. Provision of temporary alternative routes, including visible

traffic warning signals. To the extent possible, sewer lines and manholes will be

constructed in common areas not used for pedestrian orvehicular traffic

* Scheduling of delivery materials and removal of excavatedmaterial during non-rush hour periods.

I0

OPERATIONAL PHASE1I.Environmental hazards * Carefully designed post-construction maintenance,due to accidents, man- contingency and monitoring programsmade and natural disasters . Well designed plan for detection of accident or natural eventseg. accidental spills, fire, including precautionary and remedial measures to beseismic activity, observedearthquakes, heavy a Provision of preventive and remedial procedural manuals atrain/flooding and design workplacefailure . Adequate plans for environmental rehabilitation and

restoration of site and removal of temporary structures andfacilities installed during construction phase

2. Water Pollution (effluent . Wastewater discharged by the STP shall conform with thedischarge) Effluent Standards set forth in DENR Administrative Order 34

and 35 for Class C waters. Regular monitoring of wastewater effluent by the Manila Water

Company Central Laboratory* Regular check on sewer lines to prevent discharge/seepage of

untreated wastewater to the environment. Quality of civil work on the STP facility shall be enforced

during construction to avoid seepage

3. Noise Pollution (STP . Use of appropriate mounting for machinery to minimizeequipment, lift station) vibration

. All mechanical/electrical equipment shall be installed insideenclosures

. If appropriate, motors shall be provided with soundproofingdevices

. Maintenance of greenbelt zones and vegetation withappropriate tree species

4. Solid Waste . Solid waste generated within the STP facility will be minimal(generated within the facility but provision will be made for garbage collectionand by the facility) * Disposal of sludge generated will be in accordance with

established procedures of relevant authorities (disposal ofsludge for use as soil conditioner)

5. Odors (organic and sulfur . Maintenance of greenbelt zones and vegetation withcompounds coming from appropriate tree speciesraw wastewater and during . Provision of landscape which will improve the aesthetic of thedesludging of septic tanks) area by planting green strips using appropriate plant or tree

species. Provision of odor control mechanisms

(deodorizer/adsorbent/masking agent) to prevent malodorousemissions)

6, Maintenance and . Regular asset condition monitoring by Manila Water CompanyOperation of the System personnel* Poor maintenance of * Regular maintenance works for STP equipment (pumps and

mechanical equipment motors), sewer network and septic tanks(pumps and motors) . Adequate training of STP operators

. Connections . A liaison officer from the Community will assist the STPoperator in assuring the facility's efficiency in operation

. Provision of adequate maintenance equipment and spares forthe sewerage system facility

3.0 ENVIRONMENTAL MONITORING PLAN

Environmental monitoring will be the responsibility of Manila Water Company.

I0i-t S -Li _-_

Construction Phase

Compliance with Manila . At STP site and its * On-the-spot dailyWater Company health and perimeter inspection andsafety policies (dust * Pipe laying area monitoring will beemissions, good * Equipment and implemented by thehousekeeping, noise, odors) materials storage area Health and Safety

Dept. of Manila WaterCompany using theSTARRT Card(Annex 1)

Traffic . Ingress and egress to * Dailythe construction site

Operational Phase

Effluent Water Quality . Influent . Annex 2 describes infor parameters like pH, 5-day , Samples from detail the schedule ofBOD, COD, Total coliform, Treatment stages wastewater qualitysuspended solids, and oil and * Effluent monitoring.grease.

Odor * Daily

Sludge . STP site and . Weeklyaccumulation/Clogging perimeter

. At STP site

. Sewer network

. Communal septictanks

12

1.0 PROJECT DESCRIPTION

1.1 Basic Project Information

Name of Project KARANGALAN VILLAGECOMMUNITY SANITATION PROJECTMANILA SECOND SEWERAGE PROJECT

Address . KARANGALAN VILLAGE, BarangayManggahan and de la Paz, Pasig City;Barangay San Isidro, Cainta

Contact Persons : Leonor C. CleofasManager, Engineering and ProjectManagement OfficeMetropolitan Waterworks and SewerageSystemGround Floor, Engineering Building, MWSSComplex, Katipunan Road, Balara, QuezonCity 1105Tel No. (632) 920-5413; (632) 920-5521 to 40locals 3570/3569Telefax: (632) 922-2568

Ma. Fiorella De Los Reyes-FabellaWastewater Project Development ManagerManila Water Company, Inc.489 Katipunan Road, 1105 Balara, QuezonCity, PhilippinesTel No. (632)981-8147; (632)926-7999 loc2032Fax (632) 981-8106

1.2 PROJECT LOCATION

The proposed project for Karangalan Village is a sub-project of the CommunitySanitation Project, which is a component of the World Bank-assisted MSSP.

The service area is the entire Karangalan Village. The project site is along ImeldaAvenue which is accessible through Marcos Highway or Ortigas Avenue. Figure1 shows the vicinity/location map of the project.

13

Figure 1

a 0.1 0.2

___-Project Area Water Bodies

14

1.3 PROJECT RATIONALE

In Metro Manila, untreated/partially treated domestic wastewater is the majorsource of pollution of inland waters. Most residential houses in Metro Manilatreat their wastewater by means of septic tanks, which do not provide adequatetreatment to satisfy the DENR requirements for wastewater effluent standards.Moreover, majority of septic tanks in Metro Manila is not properly maintained.This situation has led to the deterioration of the Pasig River and other inlandwaters. The DENR has estimated that around 60% of the pollution load to PasigRiver, which empties to Manila Bay and Laguna Lake, come from domesticdischarges. In the case of Laguna Lake, 65% of the total pollution load isattributed to domestic waste.

There is therefore an urgent need to establish collection and treatment methodsthat will help reduce the pollution load to inland waters. The provision of anefficient and cost-effective sewage collection, treatment and disposal is theprimary objective of the Community Sanitation Project under the MSSP.

This project specifically aims to address the problems of inadequate wastewatertreatment and disposal in Karangalan Village as shown by the analysis of theeffluent of one of the septic tanks in a similar area (see Table 1 below). Theproject will help reduce public health risks and environmental pollution fromuntreated/partially treated domestic wastewater by providing a sustainablesanitation and sewerage facility. It will also serve as a good illustration of propersanitation especially to the neighboring communities near Pasig River.

Table 1Analysis of Septic Tank Effluent Quality

Limit(s) EffluentParameter DENR-EMB Sample

pH 6.5-9 7.3 @ 23.2 °C

Suspended solids, mg/L 70 106.00

Dissolved Oxygen, mg/L 0.00

Biochemical Oxygen Demand 50 190.00(BOD 5), mgIL 0100

Chemical Oxygen Demand, mg/L 100 263.90

Total Coliform Count, MPN/100 ml 10,000 17:x 106

Fecal Coliform Count, MPN/100 ml 11 x 10l

15

1.4 DESCRIPTION OF PROJECT PHASES

1.4.1 Pre-Operational / Construction Phases

1.4.1.1 Construction Plan

The project is scheduled for bidding in December 2001. Construction isexpected to commence in March 2002 and project completion is targeted inDecember 2002 (300 calendar days).

Figure 2 shows the implementation schedule for the project. Manila WaterCompany will undertake the project implementation.

1.4.1.2 Total Surface Development Block

The service area is approximately 75.2 hectares and is estimated to have acurrent population of 42,000. The project will serve all residential andcommercial establishments within Karangalan Village. Any increase inpopulation is not considered because there are no further planned developmentwithin the compound that would significantly affect the quality and/or quantity ofwastewater discharges.

1.4.1.3 Estimate of Total Land Area to be Opened for Civil Works

Civil Works will include the construction of STPs, laying of sewer lines to connectKarangalan MRH and new developments to existing communal septic tanks andthe rehabilitation of existing sewer lines and lift stations. The STPs will be locatedunderground, when necessary. The area occupied by the CSTs, as described inTable 2 below will be utilized for the STPs. Sewer lines totaling approximately500 meters will be opened for civil works.

16

Figure 2

Proposed Implementation Schedulefor the Karangalan Village Community Sanitation Project

Week No. 1 4 5 617189110 12113 14115 1617118119202122 232425262728 29 301 3213334 353637 383940

Layout and __ 5 ____ ____________- __ TII

Temporary Field

Steelwork,

Form Removal

and Curing

Excavate and

Install Sewer Line

Tes.10rl F f ing o;0f Sewer Line1

Install Treatment |ll|lll14 E 0 0 3 f

Equipment I 1

17

Table 2Land Requirement for STPs

_ _ _ __

1 Block 31 (Kayumanggi/K-1 7/K-1 8/Karunungan), 406Phase 1A

2 Block 63 (Kaayusan/Kalayaan/Karunungan), 752Phase 1 C

3 Block 84 (Kaayusan/Kabanalan/K-44/K-45), 925Phase 1 B

4 Block 58 (Kabutihan/Katipiran/K-1 18), Phase 2A 4705 Block 21 (Kagalingan/Kapatagan/Kaalaman, 230

Phase 2B16 Block 128 900

(Kau n la ra n/Ka kis igan/Ka la kasa n/Kasi-nu pan),Phase 2C1

7 Block 14 (Kaalaman/Kapayakan/Katiyakan), 759Phase 2B2

8 Block 61 (Kaluwagan/Katimugan/KC-25/KC-21), 447Phase 2C2

9 Block 61 (Kaluwagan/Katimugan/KC-25/KC-21), 754Phase 2C2

*elementary school not counted

1.4.1.4 Major Openings and Construction Activities

The complete sewerage system will include the following components:

* Collection sewers (diameter=150,/200/250 mm) with a total estimatedlength of 100 meters leading to the CSTs and STPs

* STPs with the following design capacities:

Table 3Design Capacities of STPs

_. PI1 9312 1,1933 7644 1,2655 5776 5047 4848 9689 777

18

* Sewer lines (diameter=250 mm) with a total estimated length of 400meters from STP discharge point to existing storm drainage/Creek

Civil works to be implemented are as follows:

For STP/Lift Stations For Pipelaying* Site clearing * Pavement cutting* Earthworks * Shoring and removal

- excavation and handling * Excavation and handling- dewatering * Dewatering- backfill and compaction * Pipelaying- lean concrete/ gravel bedding * Backfill and compaction

+ Concrete Works * Testing pavement restoration- shoring and soil protection * Clearing / miscellaneous activities- formworks- concreting

* Electro-mechanical- internal and external pipeworks- mechanical installation- electrical installation

* Site restoration* Clearing/ miscellaneous activities

1.4.1.5 Types of Equipment to be Used

The civil works contractor will provide equipment which include, but is not limitedto the following:

* backhoe/loader* dewatering equipment* concrete mixer/concrete pump* welding machine* compactor* jackhammer and air compressor* generator* dump trucks

1.4.1.6 Source of Construction Materials and Facilities

The following alternative type of pipe materials will be permitted for sewer mains:

* UPVC Pipe* Polyethylene* Fiberglass Pipe* Ductile Iron Pipe

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* Cast Iron Soil Pipe

The contractor can choose from the above pipe materials.

1.4.1.7 Support Services and Facilities Requirements and Availability

Support services and facilities will be tapped from the available utilities on site.Arrangements with locators in Karangalan Village or any other party will be madeby the contractor.

1.4.1.8 Estimate Total Cut Soil Volume(for pipelaying)

Table 4 presents the total system length, average excavation depth of the sewerpipes and area of the project.

Table 4Estimates of Soil Excavation Volumes

Estimated Average Excavation AverageDimensions Depth (m) Excavation

(sq.m) Volume(cu. m.)

STP site 5,600.00 6.0 33,600.00

Sewer line 275.00 1.5 412.50250mm0

TOTAL 34,012.50*Estimated dimension of pipe (sq.m.)= [(pipe diameter +0.3) x total length of pipe required]

1.4.1.9 Total Manpower Requirement

The project will be bid out based on World Bank procedures. The winning bidderwill provide contractual work for a period of around 300 calendar days. Thecontractor will provide skilled and unskilled workers to carry out the scope ofworks as detailed in the bid documents. The scope of works includes:

* site clearing* installation works for the sewer network* detailed engineering design and construction/installation works for the STP

and its appurtenances* landscaping of the STP site and the vicinity* abandonment activities (road restoration, etc.)* STP start-up operations

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1.4.2 Operational Phase

1.4.2.1 Project Operation Schedule and Duration

Completion of construction is expected by December 2002. Start-up operationswill begin immediately after project completion.

1.4.2.2 Process Technology and Activities

The project will be bid on the basis of performance specifications for the STPTreatment Process:

* Wastewater flows were computed on the basis of a per capita water demandof 200 liters per day and a 70% wastewater discharge. Storm infiltration wasestimated at 10% of the total flows. A peak factor of 1.5 was added in thecomputation of design flows to determine pipes sizes and capacity of STP.

* The influent flow characteristics were based on random laboratory analysesof septic tank effluent in other project sites. The influent quality assumptionsare shown in Table 5 below:

Table 5Influent Flow Characteristics

CST No. TSS BOD5 COD Oil and PH a(mg/I) (mg/l) (mg/I) Grease

(mg/Il)1 220 300 500 100 6-92 100 200 350 50 6-93 100 200 350 50 6-94 220 300 500 100 6-95 100 .200 350 50 6-96 100 200 350 50 6-97 100 200 350 50 6-98 220 300 500 100 6-99 220 300 500 100 6-9

TSS = Total Suspended SolidsBOD5 = 5-day biochemical oxygen demand at 200CCOD = chemical oxygen demand

* Wastewater discharged by the STP shall conform with the Effluent Standardsset forth in DENR Administrative Order 34 and 35 for Class C waters asshown in Table 6 below:

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* Wastewater treatment will reduce the BOD5 from 200-300 mg/L to 50 mg/L, atthe minimum. This illustrates an STP treatment efficiency of 75-83%.

Table 6DENR Effluent Parameters for Class C Waters

Color PCU 150pH 6-9COD mg/L 100Settleable solids mg/L 0.55-day 200C BOD mg/L 50Total Suspended Solids mg/L 70Total Dissolved Solids mg/L 7Oil and Grease mg/L 5Phenolic Substances mg/L 0.10Total Coliforms MPN/100 ml 10,000

Process Scheme of STP

The STP to be constructed in Karangalan Village may be below- oraboveground. In case a bid for belowground proposal is awarded, the onlyaboveground structures will be the control room/panel.

The STP treatment process will provide secondary treatment to septic tankeffluent. It is expected that bidders will propose different process technologiesbased on the performance specifications in the bid documents. Some factorswhich will be considered in selecting the STP treatment process are:

* Suitability in project site* Performance/Treatment efficiency* Capital and Replacement costs* Operations and Maintenance Costs* Complexity of operations* Flexibility of treatment process

A general scheme for the treatment process is illustrated in Figure 3.

1.4.2.3 Waste Production Scheme

Up to 2005, sludge produced in the treatment process will be transported to acentralized Septage Sea Disposal Station located in J.P. Rizal St, Brgy. WestRembo, Makati City. Mobile vacuum tankers will collect the sludge produced inthe STP.

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Figure 3General Treatment Process Scheme

Bd(Dcgc(SBPIDEAAdvated

SLzige)V3se LKg

sludge

Pe-LM SIUJe asci oudtce

V\Sl

A long-term disposal scheme for biosolids from the STPs will be as soilconditioner for sugarcane and corn in Pampanga. Experiments done incoordination with the Sugar Regulatory Administration on the use of sludge inenhancing the soil quality of lahar-covered areas and the growth of crops such assugarcane, corn and bittergourd resulted in the issuance of a temporary licenseissued by the Fertilizer and Pesticide Authority. The license allows the use ofsludge in growing similar crops.

Sludge generated from the STPs can also be treated in the 600 cum/day septagetreatment facility which is expected to be operational by 2004. This facility is partof the Sanitation Component of the Pasig River Rehabilitation Project. Thefacility will be operated by Manila Water Company.

1.4.2.4 Manpower Requirement

Manila Water Company will assign an LLDA and DENR-accredited PollutionControl Officer (PCO) who will be responsible for the compliance of the STPswith government regulations. The PCO will have trained operators/crews whowill monitor and manage the operation of the sewer network.

Since the STP operations will be operated largely by automation, regularmaintenance works will include declogging of sewer lines and removal of sludgefrom the STP site and the communal septic tanks. The STP operator will visit theproject site daily. Monitoring of the effluent quality will be the joint responsibilityof the PCO and the Central Laboratory of Manila Water Company.

The NHA has also agreed to provide a liaison officer who will coordinate withManila Water Company personnel on the proper operations of the STP and thesewer network. A 24-hour Customer Service Hotline (1627) is available to acceptcomplaints and other emergency reports. Manila Water Company has sewernetwork repair crews who work in regular round-the-clock 8-hour shifts and whoare readily available for any emergency work.

1.4.3 Abandonment Phase

Upon completion of the project scope, the contractor will remove all temporarystructures and facilities installed during the construction phase. All pavementswill be restored. The cost of abandonment will be incorporated in the overall costof the project. Manila Water Company will issue a certificate of final acceptanceonly upon completion of all abandonment works by the contractor and uponturnover of the STP operations.

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2.0 BASELINE ENVIRONMENTAL CONDITIONS

2.1 STUDY METHODOLOGY

This Initial Environmental Examination (IEE) was prepared in compliance with theWorld Bank's Operational Directive 4.01 on Environmental Assessment. An IEEwas previously carried out according to the DENR Administrative Order No. 96-37, for which an Environmental Compliance Certificate (ECC) dated Feb. 19,2001 has been issued by the DENR-Regional Office (Annex 3).

2.2 LAND

2.2.1 Land Resource Utilization

Karangalan Village has an estimated land area of 75.2 hectares. Approximately60% of the total area is devoted to residential use, while 40% accounts forcommercial, institutional, and community facilities and open spaces.

2.2.2 Physiography and Geology

Karangalan Village lies on a relatively flat plain. Soil type in the area belongs tothe QA1-Quaternary Alluvium class. Quaternary Alluvium is characterized bydetrital deposits; mostly silt, sand and gravel.

2.2.3 Vegetation and Wildlife

The proposed sites for the STPs are inside the area presently occupied by the liftstations and communal septic tanks. Figures 4A-4D show photographs of theproposed sites.

The vegetative cover of the site is predominantly wild grass interspersed with asmall number of wild, adolescent vegetation. The plant species that can befound in the site and which will be uprooted during construction are listed below.

25

Figure 4A

- ~~~Location of CST 2

F-W

' 6

_~~~~~

3 !'l i ~~~~~Location of CST 2

.- ,'~~~~ sf.

..*- -, -q

26

Figure 4B

~~~~~~~~~~~~~~~~~~~- _4x._

} Locatio~~~~~~~n of CST3

5-~~~~~~Z-

27

Figure 4C

' . 8" .2 . Location of CST 5

C, M -. i . -. .

-~~~~~~~~ s ~ -;I t _

~~~~~:~ a ~er q- Iq ;,i

Li ri . _ ,_

~._- - . -1 -4 iJ - .- F

r ~ ~ ~ ~ ~ ~ C s: -

ir? 5t . wa ~~~Location of CST 6

- - 2

-- -- _

F-d ,~~2

Figure 4D

- < -8~ ' - . Location of CST 7

ti#,.~~~~~Lcain o

'.--~2

Table 7Vegetative Cover-Karangalan Village

g my =! - ., 9 -

Mango (Mangifera indica), Banana (Sapientum spp), Santol(Sandoricum koetjape), Jackfruit (Artocarpus heterophylla),Guyabano (Annona muricata), Coconut (Cocos nucifera), Tamarind(Tamarindus indicus), Palm (Chrysalidocarpus lutescens), Gabi,Saluyot, Narra (Pterocarpus indicus)

2 Aratiles (Muntingia calabura), Tamarind (Tamarindus indicus),Banana (Sapientum spp), Coconut (Cocos nucifera), Mango(Mangifera indica), Kangkong, Guava (Psidium guajava), Sayote,Saluyot, Eucalyptus (Eucalyptus sp), Camansi (Artocarpus altilis),Achuete (Bixa orellana), Gabi

3 Banana (Sapientum spp), Ipil-ipil (Leucaena leucocephala), Starapple (Chrysophyllum cainito), Jackfruit (Artocarpus heterophylla),Pomelo (Citrus grandis), Achuete (Bixa orellana)

4 Mango (Mangifera indica), Coconut (Cocos nucifera), Banana(Sapientum spp), Ipil-ipil (Intsia bijuga), Gabi, Cassava (Manihotesculenta), Papaya, (Carica papaya), Alibangbang (Bauhiniapurpurea), Saluyot, Okra, Santol (Sandoricum koetjape), Pomelo(Citrus, grandis), Talahib, Sweet potato, Sugarcane

5 Mango (Mangifera indica), Coconut (Cocos nucifera), Banana(Sapientum spp), Gabi, Papaya, (Carica papaya), Saluyot, Santol(Sandoricum koetjape), Pomelo (Citrus, grandis), Camansi(Artocarpus alftilis), Guyabano (Annona muricata), Jackfruit(Artocarpus heterophylla), Guava (Psidium guajava), Avocado(Persea americana), Narra (Ptercocarpus indicus), Callistemon

6 Mango (Mangifera indica), Banana (Sapientum spp), Gabi, Santol(Sandoricum koetjape), Guyabano (Annona muricata), Jackfruit(Artocarpus heterophylla), Guava (Psidium guajava), Avocado(Persea americana), Tamarind (Tamarindus indicus), Talahib, Sweetpotato, Papaya (Carica papaya), Kamias (Averrhoa bilimbl), Horseradish (Moringa oleifera), Sili (Capsicum spp), Atis (Annonasquamosa), Blumea balsamifera, Bidens pilosa, Saccharumspontaneum, Vitex parvifolia

7 Mango (Mangifera indica) ), Coconut (Cocos nucifera), Kamias(Averrhoa bilimbi), Tamarind (Tamarindus indicus), Avocado (Perseaamericana), Santol (Sandoricum koetjape), Guava (Psidium guajava),Jackfruit (Artocarpus heterophylla), Atis (Annona squamosa), Chico,Tiesa (Pouteria campechiana), Guyabano (Annona muricata), Starapple (Chrysophyllum cainito), Sampaguita (Jasminum sambac),Katakataka, San Francisco (Codiaeum variegatum), Broussonetialuzonica, Tecoma stans

8 Jackfruit (Artocarpus heterophylla), Banana (Sapientum spp),Sugarcane, Santol (Sandoricum koetjape), Mango (Mangifera indica),Gabi, Okra, Cassava (Manihot esculenta), Pomelo (Citrus grandis),

30

Bidens pilosa, Sida rhombifolia, Urena lobata9 Mango (Mangifera indica), Ipil-ipil (Leucaena leucocephala), Guava

(Psidium guajava), Camansi (Artocarpus altilis), Dapdap (Erythrinavariegata), Banana (Sapientum spp), Kamias (Averrhoa bilimbi),Guyabano (Annona muricata), Mahogany (Swietenia macrophylla),Macahiya (Mimosa pudica)

Faunal population is limited to household pets and stray animals.

2.2.4 Land Acquisition Assessment

Manila Water will be allowed to use parcels of land for the nine (9) STPs by wayof a grant of perpetual easement from the National Housing Authority-theowner/developer of the community. At no time shall land be acquired for theproject. All identified parcels of land are free from informal settlers.

2.3 WATER

2.3.1' Inventory of Water Bodies

The project area is near Hakbangan Creek which ultimately drains to the PasigRiver. At present, Pasig River does not meet Class C standards (ie., suitable forpropagation and growth of fishes, recreational uses and industrial water supply)especially during the summer months when there are no sufficient inflows. Atthese times, the BOD in Pasig River reaches 10 mg/L, which is 12 times higherthan the permitted level for Class C water; DO drops to zero; and total coliformsexceed the MPN/100 ml standard by up to several thousand degrees,

2.3.2 Water Quality (SurfacelGround)

Surface Water QualitY. Pollution loading to the Pasig River will be reduced sinceseptic tanks and raw wastewater from the project area will no longer bedischarged directly to the River. Effluent from the plant will comply with DENREffluent Quality standards sufficient for Class C waters.

Sixty five percent (65%) of the pollution loading to the Pasig River comes ffromdomestic waste. Without any sewerage or sanitation interventions, the pollutionload entering the river is expected to increase dramatically unless necessarysteps to reduce pollution loading from domestic wastewater is taken.

Ground Water Quality. Since septic tank effluent will undergo further treatment inthe plant, the possibility of contaminating the aquifers due to leachate from septictank discharge or from raw wastewater will be eliminated. Seepage from plantoperations will be non-existent.

31

2.4 AIR

Pasig City and Cainta experience only two types of weather conditions, rainyseason and the dry season. Rainy season occurs between the months of Julyand October, while the dry season occurs between November and June. Meanannual temperature is 27.4°C and average annual humidity is 77% for MetroManila.

Air quality within Karangalan Village is moderately unpolluted. However, outsidethe premise is a national road where public and private vehicles exhaust vehiclefumes contributing to the air pollution in the vicinity.

2.5 PEOPLE

2.5.1 Population

Assuming 7 persons per unit, the projected population is 42,000 based on fulloccupancy of the 6,000 households. Social status of the families range fromClass B to Class D based on the classification of the National Statistics Office(NSO).

2.5.2 Project Affected Persons

During construction, the project will cause noise and traffic nuisance to theVillage, its neighboring communities and pedestrians and motorists. Onceoperational, the project will directly affect the residents of the entire KarangalanVillage. The sanitation of the community will be improved when the new sewersystem is operational.

Manila Water will assign skilled personnel to operate and maintain the system upto approved standards.

3.0 ALTERNATIVES

Karangalan Village is considered a priority area for the improvement of sanitationconditions based on the following factors:

* It has a relatively high population density.* The existing sanitation facilities are inadequate to comply with the DENR

effluent standards.+ The communal sanitation and drainage systems in the compound are not

being maintained.* Some households are directly discharging raw wastewater to the

Hakbangan Creek.

32

Bidders for the project may opt to add another STP to the biomodule site (CST 1)and construct eight (8) more secondary treatment facilities or put up secondarytreatment for the effluent of each CST combining treatment for flows from CSTs 2& 3 and CSTs 5 & 6 in doing so. The sites will not require relocation ofinhabitants during construction. Figure 5 shows the STP location maps.

4.0 IMPACT ASSESSMENT

4.1 IMPACT IDENTIFICATION

Table 8Sources and List of Potential Environmental Impacts

_ M0 0r S - .- - .-CONSTRUCTION PHASE

Air Pollution The impact on the air quality will only occurduring the construction phase, but could be

1. Dust emission will occur due to civil works controlled through proper measures. Amongsuch as excavation, disposal of excess the potential air impacts are:soil, etc. . Ground level concentration of suspended

2. Emission of dust and other air pollutants solids will increaseby vehicles. . Air pollutants such as C02, CO, and NO. will

occur from vehicle emissions.Water Pollution * Improper disposal of the wastewater

produced could lead to contamination of1. Domestic waste made by the construction ground water.

workers and staff. . Uncontrolled wastewater discharge,2. Wastewater will be produced due to the construction debris and oil leakage / spill will

washing of vehicles. increase the sedimentation/contribute to the3. Spillage of oil might occur through pollution of the nearest body of water

improper handling.Noise Pollution . Noise level will increase due to the usage of

noise generating equipment.1. Noise pollution from the operation of

construction equipment and vehicles.OPERATIONAL PHASE

Water Pollution . The project will reduce the wastewater loadinto the Laguna Lake and will constitute a

1. Improper operation and maintenance of positive impact. However, improperthe STP will result to water pollution. operations/maintenance of the STP will

result to the discharge of untreated orpartially treated effluent.

Odor Pollution . The whole Karangalan Village, especiallythe buildings near the STP, will experience

1. Unpleasant odor will result from the unpleasant odor during periods of odoranaerobic conditions and improper emission.operation and maintenance of the STP.

Noise Pollution . Impact will be insignificant and can easily becontrolled through proper preventive

1. Noise generating engines and equipment measures.that are necessary for the operation ofSTP will be used. Added noise will becreated during its operation.

33

Socio-Economic * The STP will result to a positive impactsince the domestic wastewater will be

1. The project will result to proper treatment treated and will help decrease the pollutionof wastewater. load into Pasig River. Also, the treated

2. Value of land will increase. water could be re-used.Residual and Unavoidable Impacts * Proper precautionary and preventive

measures to avoid these kinds of impacts.1. Accidents and man-made disasters might

occur due to design failure and improperconstruction practices.

2. Environmental hazards might occur due tonatural disasters like earthquakes,typhoon, etc.

4.1.1 Impacts During Construction Phase

A. Air Quality

During the implementation of the project, an increase in emission of dust andsuspended particulates will occur in the vicinity of the STP site and excavationsfor the sewer pipes. This can be attributed to civil works such as excavation,disposal of excess soil and other related construction activities. Another causewill be emission of fumes and other air pollutants of the vehicles to be used.

B. Water Quality

Excavation activities in the project site could loosen soils and transport of thesematerials to the Pasig River will result in siltation or increase in turbidity.Inappropriate disposal of human waste by construction workers, excessive use ofwater for washing of equipment and spillage of oil might also occur.

C. Noise

Noise will be generated during the construction of the project due to theoperation of equipment and construction activities. Considering that theproposed site for the project is near the residential buildings, proper mitigatingmeasures will be done to ensure that the equipment and activities will cause littleor no disturbance to the residents.

Heavy equipment will be monitored to operate only in short periods of time toavoid sustained high level of noise. The operator of heavy equipment will berequired to pause work for 10-15 minutes after every two (2) hours of operation.The use of heavy equipment will be strictly prohibited from 6:00 P.M. until 8:00A.M. on weekdays. Residents will be given prior notice at least one (1) daybefore use of any heavy equipment on Saturdays. Use of heavy equipment willbe prohibited during Sundays except for special or emergency activities thatneed immediate action.

34

Figure 5Location of Sewage Treatment Plants

FGtTRE lI.F-

0G R F0.13 0

FiGliRE 1O.3

STPr 7

FIGUM~~~~~~ .G FIU. ... C

35

Figure 5BProposed STP Site 1

Manila Water200mmO PVC PIPE 350mm0 PIPE CULVERTTOP OF PIPE EL.20.66 TOP OF PIPE EL.20.68BOT. OF PIPE EL.18.97 BOT. OF PIPE EL.18.83

EXISTG SEPTICE TANK.EXISTO BEPTILIZED K

EXIST G GRIT CHAMBER G C L/

OPEN SPACES CAN BE UTILIZED/\ _FOR OTHER TREATMENT UNITS ( 100 sq. m. )

36

Figure 5CProposed STP Site 2

Manila Water

NEW CYCLONE WIRE GATE IC,

EXISTCG CYCLONE PROPOSED

WIRE FENCE ~~~~~~~~~~UNDERGROUND SIP

EXISTING CONSTRUCT NEW BASKETBALL COURTE SE-PTIC TANK ~~~~~~~~ABOVE THE PROPOSED STP

~~~ ~NEW CYCLONE WIRE FENCE

T__ _ _ _ _ _ _ S T P E F F L U E N T L IN E T ONEWMCHCLONE E1~4IE NEAREST DRAINAGE MANHOLE250mmO _ A ~~~~H O H - -NE0W CYCLONE-WIRE ATE X SM250mmoM 0n020moPV M

37

Figure 5D

Manila Water Proposed STP Site 3

E

_i-EXSTGFEE C FENCE

ElTN SEPV TK 4 3 S T.

< ELINETO BE ABANDONED PROPOSED STP R

(MAYBEEUMNHEGROUND(MAYBOEUNEGROUND

38~~~~RA3VERUD

Figure 5EProposed STP Site 4

Manila Water

04 3 ~UTILIZE EXISTINGSEPTIC TANK STRUCTURE

STP EFFLUENT LINE

200mm0 ISMH SMH LJ ;\ A I/< t ADDITIONAL AREA FORPROPOSED STP IF REQUIRED

- A_ POPOSED CYCLONE WIRE FENCE

EE ~ ~ ~ ~~~~~~~ XISTING SEPTIC TANK

MAYBE USED )

1 1SMH I39

39

Figure 5FProposed STP Site 5

Manila Water

10 WEP/

STP EFFLUENT LINETO EXISTING DRAINAGE CANAL

/ l ~~~~~~~~~~RES.

PROPOSED STP(1 90 SQ. M.)

ABOVEGROUND ORUNDERGROUND EXISTING DRAINAGE LINE

/ g o ST-5 z X MH~~~~o w

/ g9w EXISTING PIPE LINETO BE ABANDONED

40

Figure 5GProposed STP Site 6

Manila Water

STP EFFLUENT LINE TO \ \4NEAREST DRAIAG LIN

EXIST'GXST SEPTIC

TAK TO BEAI ABANDONE

- H lST1

Figure 5HProposed STP Site 7

Manila Water

ax < ~~~~JE3 7 003 @

~~~~~~3 1J°

< >\ ~~~~~PARKING LOT DMH

K A A L A M A N R O A DX \ STP EFFLUENT LINE

\ ~~~~~~~~1W 65O ST7 EXIST'G PIPE LINETO BE ABANDONED

SEPTIC TANZ

g g E o0

08.~~~~~~~~~~~~~~~~~~~~~0

SMH

H 20H0 200mm 2 JB

NOTE: PROP. STP MAYBE ABOVEGROUND

42 OR UNDERGROUND

Figure 51Proposed STP Site 8

Manila Water

EXISTING FENCE TO BE REMOMED N

H-~~~~

EXISTING SEPTIC TANK SHALL BEUTILIZED AS STP AND ADJACENT

DRAINAGE CANAL I AREA MAYBE USED IF REQUIRED

STP EFFLUENT LINE

WEP SS NEW CYCLONE WIRE FENCE LEXISTG EFFLUENT TO BE ABANDONED

43

Figure 5JProposed STP Site 9

Manifa Water

EXISTVG SEPTIC TANK EFFLUENTL s LINE MAYBE USED IF POSIBLEaE UTILIZE EXISTING SEPTIC- TANK STRUCTURE

0~~~~~~~~C)~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~~~~~~~~~~~A

DMH

K C - 3 5 S T. SM ) 20 Omrn0 PCC

2 00mmo PVC

XIST GADDITIONA ARE

| k GC X SX / P/ ~~~~~PROPOSED CYCLONE WIRE FENCE

O< SMH STP EFFLUENT LINE

N / ITS IF REEQ'D

< SMH <~~~~~~~~~~~~~~~~~~~~

a S \ 9 . \~~~~~

\\ \\ \~~~

44

Table 9 shows the typical noise emissions of common construction equipmentused at various distances from source.

Table 9Typical Noise Emissions of Construction Equipment at Various Distances

from Source in dB(A)

_ 0 - I - -_I . -

Air Compressor 75-87 69-81 63-75Backhoe 71-92 65-87 59-81Compactor 72 66 60Concrete Mixer 75-88 69-82 63-76Pumps 70-90 64-84 56-78Tractors, 78-95 72-89 66-83BulldozersTrucks 83-93 77-87 71-81Jack Hammer 81-97 75-91 69-85

D. Ecological Effects

Since there are no rare, endemic species of flora and fauna in the project area,project implementation has minimal impact on the overall terrestrial ecology ofKarangalan Village. Some plants will be unavoidably cleared during civil works.

4.1.2 Impacts During Operation Phase

A. Air Quality

There will be minimal effect on the air quality during the operational phase of theSTP. Aside from the occasional odor nuisance, there will be no adverse effecton the air quality. The performance specifications for the STP treatment processspecifically state that the facility should have odor control mechanisms (eg.,deodorizer, masking agent, adsorbent, etc.). Manila Water Company will notaccept the turnover of the STP by the contractor if the facility emits unpleasantodors. Permanent solution(s) to address any odor nuisance will be theresponsibility of the contractor.

B. Water Quality

Without wastewater treatment, Karangalan Village accounts for an estimated1,493 kg/day BOD5 loading to the Pasig River. The implementation of the projectwill contribute to the improvement of the quality of water in Pasig River byreducing discharge of untreated/partially treated wastewater. From a pollutionloading of 1,493 kg BOD5/day, loading will be reduced to 224-373 kg BOD5/day,or a 75-85% BOD reduction, when the STP becomes operational.

45

C. Socio-Economic

A flat sewer charge equivalent to 50% of the water charge is already included inthe water bill of those served by the biomodule. Once the STPs arecommissioned, the whole service area will pay the sewer charge. This fee willhelp cover the costs of the operations and maintenance of the STP and thesewer network. This arrangement has been explained to the estate manager-theNational Housing Authority, which disseminates project information to thepopulace. The consultation to be done with the community is explained inChapter 6.0.

The general sanitation conditions in the project area will significantly improve.The project will reduce, if not eliminate the threat of water borne diseases suchas diarrhea and typhoid, which are more costly to manage.

D. Sludge Disposal and Management

The existing septic tanks in the area produce an estimated 283,500 kg of sludgeper year. The table below illustrates the sludge production averages for variouswastewater treatment processes. Also indicated is the estimated sludgeproduction of the STP considering each type of treatment.

Table 10Sludge Production of Various Wastewater Treatment Processes

Treatment Process Typical Dry Solids ,I ; VProduction (kglm3) S . ,;IU

Activated sludge 85 634,355Trickling filtration 70 522,410Extended aeration 100* 746,300Aerated lagoon 100* 746,300*assumes no primary treatment

The bidders for the project may propose any of the above wastewater treatmentprocess or their modifications. Cost and operational efficiency are among theconsiderations for awarding the bid.

In the interim (i.e. up to 2005), sludge produced in the treatment process andcollected from the communal septic tanks will be transported to a Septage SeaDisposal Station located in J.P. Rizal St., Brgy, West Rembo, Makati City.Vacuum tankers will collect the sludge produced in the STP and the septagefrom septic tanks.

A long-term alternative is the disposal of sludge and septage to the lahar areas inPamapanga. The sludge can be used as soil conditioner for sugarcane and corn.Experiments done in coordination with the Sugar Regulatory Administration onthe use of sludge in enhancing the soil quality of lahar-covered areas and the

46

growth of crops such as sugarcane, com and bittergourd resulted in the issuanceof a temporary license issued by the Fertilizer and Pesticide Authority. Thelicense allows the use of sludge in growing similar crops.

Starting 2004, a septage treatment facility will also be available to treat sludgeand septage from the STP. This septage treatment facility is part of theSanitation Component of the Pasig River Rehabilitation Project. Manila WaterCompany will operate the septage treatment facility. Stabilized sludge may alsobe used as filling material.

4.2 IMPACT PREDICTION AND EVALUATION

Table 11 below presents a summary of the assessment of the impacts of theproject.

Table 11SUMMARY OF ASSESSMENT OF ENVIRONMENTAL ISSUES/IMPACTS

Environmental Impact AssessmentIssueslimpacts Classification Probability Reversibility Time Magnitude

Scale1. Construction Phase

Air/Dust Pollution . * _ < 4Noise . < IVTraffic * < 4.Soil Erosion El 4.Water Pollution L < 4Increased .Employment +S4

2. Operational PhaseWater Pollution o >

Contamination ofdrinking L I > 4.water supplyOdor Pollution < 0 < vNoise o 4< 4.Accidents/hazards I < 4.Health benefits + S >Property Value andCommercial + * + >4AttractivenessEnvironmentalsanitation + * 40 >enhancement

+ Positive 0 Unlikely to occur 4 Reversible < Short term + Insignificant- Negative * likelytooccur + Irreversible > Long term v Moderate

+ Severe

47

The implementation of the project is projected to produce minimal adverse effectenvironmental impacts. Moreover, the long-term benefits from the project such asimproved sanitation conditions within the Village and its immediate environs,lesser risk of waterborne diseases, and reduction in pollution will more thancompensate for the negative effects that this project will cause duringconstruction and operation.

Mitigating measures will be implemented to minimize, if not eliminate anyadverse impact that the project may cause. Measures to enhance the existingenvironmental conditions in the project site shall be implemented, as needed.

4.3 UNAVOIDABLE AND RESIDUAL IMPACTS

Unavoidable and residual impacts are those which occur as a result of naturalcalamities such as floods caused by typhoons or heavy rains, earthquakes andthe like. Appropriate measures will be done to anticipate these impacts and toimplement contingency action plans.

5.0 ENVIRONMENTAL MANAGEMENT PLAN

5.1 IMPACTS MITIGATION / ENHANCEMENT PLAN

Table 12 below is a matrix on the environmental management plan of theproposed project.

Table 12ENVIRONMENTAL MANAGEMENT PLAN

CONSTRUCTION PHASEPotential Manner of

Environmental Mitigating Measures Implementation ScheduleImpact

1. Poor quality of . Manila Water Company will To be included in the Dailyconstruction monitor the supply and contractor's scope of

installation contract to work, under theassure quality of equipment supervision of Manilaand construction. Site Water Company.Managers and Engineerswith experience inconstruction managementshall approve all materialsand equipment to be usedand installed at the site.

. The contractor will berequired to post aperformance bond for theDesign and ConstructionContract of the seweragesystem.

48

2. Air pollution a Efficient construction To be included in the Start of(suspended planning and work contractor's scope of constructionparticulates, odor scheduling work, under the and dailyand fumes, vehicle . Formulation of appropriate supervision of Manilaemissions eg. C02, work plans, work scheduling, Water Company.CO NOX) work specifications and work

methodologies. Provision of properly

maintained storage area forkeeping stocks ofconstruction materials andequipment

. Prompt and fast removal ofexcavated materials ordredges spoils fromconstruction site

. Sprinkling of water on dust-generating mounds ofresulting from earthmovingactivities and civil works.

. Control of motor vehicleemissions

. Dust accumulation will alsobe prevented through properwashing of the vehicles priorto its departure from the site

. Development andenforcement of strict healthand safety pollution controlregulations specific for theproject site- Good housekeeping of

workplace andconstruction affectedareas

- Use of Protective Gearby all workers

3. Water pollution . Provide temporary drain To be included in the Duringdue to wastewater, systems and storage contractor's scope of constructionoil leakage/spills, facilities for excavation soils, work, under thetoxic and hazardous fuel and oils needed for supervision of Manilasubstances equipment Water Company.

. Cautious and sensibleplanning for construction andpost-construction phases ofthe project

. Provision of a routinechemical and oil spill clean-up plan

. Formulation of a monitoringprogram

4. Noise pollution . Establish temporary sound To be included in the Dailyfrom operation of barriers around the work site contractor's scope of

49

construction . Proper scheduling and work, under theequipment phasing of high-noise supervision of Manila

activities Water Company.. Use of appropriate mufflers

and sound proofing forconstruction machinery,equipment and engines

. Use of Personnel ProtectiveEquipment by all workers

5. Temporary . Public information campaign To be included in the Dailydisruption of traffic posting schedule of contractor's scope offlow within the construction work, under thecompound . Provision of a liaison officer supervision of MWCI

from the residents of thecompound to assist theinformation disseminationregarding inevitable changesin schedule of operations

. Provision of temporaryalternative routes, includingvisible traffic warning signals

. To the extent possible,sewer lines, manholes andlift station will be constructedin common areas not usedfor pedestrian or vehiculartraffic

. Scheduling of deliverymaterials and removal ofexcavated material duringnon-rush hour periods.

6. Accumulation of . Hauling and proper disposal To be included in the Dailysolid waste in of waste construction contractor's scope ofconstruction site materials by contractor, work, under the

supervised by Manila Water supervision of MWCICompany

. Provision of temporary toiletfacilities for workers

*Manila Water Company's contractor shall comply with all the conditionsstipulated in the scope of work. Any violation by the contractor will be penalizedby a performance security incorporated in the bid. The performance security willbe in the form of an unconditional bank guarantee in the amount of 10% of thecontract price.

50

OPERATIONAL PHASEPotential Manner of

Environmental, Mitigating Measures Implementation. ScheduleImpact

1.Environmental . Carefully designed post- Manila Water Observancehazards due to construction maintenance, Company of guidelinesaccidents, man- contingency and monitoring will be donemade natural programs daily.disasters eg. . Well designed plan forAccidental spills, detection of accident orfire, seismic natural events includingactivity, precautionary and remedialearthquakes, heavy measures to be observedrain/flooding and . Provision of preventive anddesign failure remedial procedural manuals

at workplace. Adequate plans for

environmental rehabilitationand restoration of site andremoval of temporarystructures and facilitiesinstalled during constructionphase

2. Water Pollution . Wastewater discharged by Manila Water Refer tothe STP shall conform with Company Annex 2the Effluent Standards setforth in DENR AdministrativeOrder 34 and 35 for Class Cwaters. Annex 2 describes indetail the schedule ofwastewater qualitymonitoring.

. Regular monitoring ofwastewater effluent by theManila Water CompanyCentral Laboratory

. Regular check on sewer linesto prevent discharge/seepageof untreated wastewater tothe environment

. Quality of civil work on theSTP facility shall be enforcedduring construction to avoidseepage

51

3. Noise Pollution * Use of appropriate mounting Manila Water Observancefor machinery to minimize Company shall be donevibration daily.

. All mechanical/electricalequipment shall be installedinside enclosures

. If appropriate, motors shall beprovided with soundproofingdevices

* Maintenance of greenbeltzones and vegetation withappropriate tree species

4. Solid Waste . Solid waste generated within Manila Water Weekly(generated within the STP facility will be Companythe facility and by minimal but provision will bethe facility) made for garbage collection

. Disposal of sludge generatedwill be in accordance withestablished procedures ofrelevant authorities (disposalof sludge for use as soilconditioner)

5. Odors (organic . Maintenance of greenbelt Manila Water This shall beand sulfur zones and vegetation with Company inspectedcompounds coming appropriate tree species daily.from raw . Provision of landscape whichwastewater and will improve the aesthetic ofduring desludging the area by planting greenof septage) strips using appropriate plant

or tree species. Provision of odor control

mechanisms(d eod orizer/ad so rbent/m as k ing agent) to preventmalodorous emissions)

6, Maintenance and . Regular asset condition Manila Water This shall beOperation of the monitoring by Manila Water Company done daily.System Company personnel* Poor . Regular maintenance works

maintenance of for STP equipment (pumpsmechanical and motors), sewer networkequipment and septic tanks(pumps and . Adequate training of STPmotors) operators

. A liaison officer from theCommunity will assist theSTP operator in assuring thefacility's efficiency inoperation

. Provision of adequatemaintenance equipment andspares for the seweragesystem facility I

52

5.2 ENVIRONMENTAL MONITORING ACTION PLAN

Tables 13 and 14 below present the action plan for environmental monitoring forthe proposed project. Manila Water Company will be responsible for themonitoring of the STP, the sewer network, and communal septic tanks.

Table 13Environmental Monitoring Action Plan

Construction Phase

Compliance with Manila . At STP site and its * On-the-spot dailyWater Company health and perimeter inspection andsafety policies (dust . Pipe laying area monitoring will beemissions, good * Equipment and implemented by thehousekeeping, noise, odors) materials storage area Health and Safety

Dept. of Manila WaterCompany using theSTARRT Card(Annex 1)

Traffic . Ingress and egress to * Dailythe construction site

Operational Phase

Effluent Water Quality . Influent . Annex 2 describes infor parameters like pH, 5-day . Samples from detail the schedule ofBOD, COD, Total coliform, Treatment stages wastewater qualitysuspended solids, and oil and . Effluent monitoring.grease.

* STP site and . DailyOdor perimeter

Sludge . At STP site . Weeklyaccumulation/Clogging . Sewer network

. Communal septictanks

53

Table 14Institutional Monitoring

Item Reporting SchemeReporter Recipient Frequency

Pre-Construction PhaseConfined Space Contractor Manila Water every entry into aPermit confined spaceWelding Contractor Manila Water onceAccreditation .Construction PhaseSTARRT Card Contractor Manila Water dailyProgress Report Manila Water MWSS quarterly

MWSS World BankOperation PhasePCO Report (See Manila Water DENR/LLDA quarterlyAnnex 4 for the PCO MWSSPCO ReportFormat)

The procedures to be used during the sampling and analysis will be based on thestandard methods prescribed in DENR Administrative Order No. 34 and 35.Annex 5 presents a sample monitoring sheet of effluent quality used by ManilaWater Company.

6.0 CONSULTATION PROCESS

The development of the project included consultations with barangay officials,community developers and managers (see Annex 6-endorsement of barangays).Consultation with the community is done in coordination with the NationalHousing Authority (NHA) who is the owner and developer of the project. TheNHA also acts as estate manager. Community issues, such as those concerningwater and sewerage, are explained to the community through the estatemanager. Information and developments are echoed to the community alsothrough the NHA. The 1994 Memorandum of Agreement (see Annex 7) by andbetween the MWSS and the NHA further specifies the responsibilities for therehabilitation of the sewerage system of Karangalan Village.

54

-ANNEX 1

ANNEX 1. MANILA WATER COMPANY STARRT CARD FOR MONITORINGCONSTRUCTION WORKS

SAFETY TASK ANALYSIS RISK REDUCTION TALK (STARRT) CARD

NAME OF CONTRACTOR: DATE: _SUPERVISOR/FOREMAN: _

JOB DESCRIPTION: NIGHT 2

LOCATION: DAY 2

TODAY ACTIVITIES:

PRIMARY HAZARDS INVOLVED:SAFETY PRECAUTIONS TAKEN:

PUBLIC SAFETY HAZARDS (ENVIRONMENTAL)BARRICADES N/A YES NO NOISE N/A YES NOTRENCH PLATE N/A YES NO HEATSTRESS N/A YES NOSIGNS N/A YES NO GROUND CONTAMINATION N/A YES NOBARRIERS N/A YES NO WORKING AT HEIGHTFLASHERS N/A YES NO FULL BODY HARNESS YES NOGUARDS N/A YES NO SHOCK ABSORBING LANYARD YES NONOTICES N/A YES NO ACCESS LADDERS YES NOOTHER N/A YES NO TIE OFF POINTS N/A YES NO

HAZARDS (BODY) HORIZONTAL SAFETY LINE N/A YES NOFALL POTENTIAL N/A YES NO ENERTIA REAL N/A YES NOPINCH POINTS N/A YES NO SLIP GRIPS N/A YES NOELECTRICAL SHOCK N/A YES NO SAFETY NETS N/A YES NOSLIP-TRIP N/A YES NO MAN BASKETS N/A YES NOFLYING PARTICLES N/A YES NO SUSPENDED PLATFORM N/A YES NOTHERMAL BURNS N/A YES NO DROP AREA PROTECTION N/A YES NOMANUAL LIFTING N/A YES NO BARRICADES N/A YES NOSHARP OBJECT N/A YES NO SCAFFOLD

HOUSEKEEPING GREEN TAG UP TO DATE N/A YES NOAREA TIDY YES NO HANDRAILS, LADDERS. BOARDS N/A YES NOFREE OF WASTE YES NO FULL WIDTH PLANKING N/A YES NO

PPE ALL PLANKS IN GOOD CONDITION N/A YES NOHARD HAT YES NO CONFINED SPACESAFETY GLASSES YES NO CONFINED SPACE PERMIT ISSUED YES NOWORK GLOVES YES NO CONFINED SPACE STANDBY PERSON YES NOSAFETY BOOTS YES NO ATMOSPHERE TESTED YES NOCHEMICAL GLOVES N/A YES NO WORKERS TOLD OF HAZARDS YES NORUBBER BOOTS N/A YES NO ENTRY PERMIT COMPLETED YES NOMONO GOGGLES N/A YES NO WELDINGFOOT GUARDS N/A YES NO HOT WORK PERMIT YES NO

EXCAVATION FIRE WATCH MAN YES NOEXCAVATION PERMIT YES NO FIRE EXTINGUISHERS YES NODAILY INSPECTION YES NO FIRE BLANKET YES NOBENCHED/SLOPED/STEPPED YES NO SHIELDS N/A YES NOLADDER PROVIDED YES NO CYLINDERS SECURED...SIGNS & BARRICADES IN PLACE YES NO ... & MOVED FROM SPARK AREA N/A YES NO

ELECTRICAL SPARKS CONTAINED N/A YES NOCORDS IN GOOD CONDITION N/A YES NO COMBUSTIBLES CLEARED N/A YES NOPLUGS & RECEPTORS NOT - FACE SHIELD N/A YES NO

BROKEN N/A YES NO BURNING GOGGLES N/A YES NOCORRECT VOLTAGE RATING N/A YES NO FRESH AIR N/A YES NOSTRUNG ABOVE GROUND N/A YES NO RESPIRATOR N/A YES NONOT THROUGH WATER N/A YES NO EAR PROTECTION N/A YES NO

SAFETY HARNESS N/A YES NOOTHERS: -------- ------

LIFTING EMERGENCY EQUIPMENTRIGGING IN GOOD CONDITION YES NO FIRE EXTINGUISHER N/A YES NOPROPER RIGGING YES NO SAFETY SHOWER N/A YES NOLIFTING ZONE BARRICADED YES NO EYEWASH N/A YES NOCURRENT INSPECTION ON CRANE YES NO REPAIR PROCESS EQUIPMENTOVERHEAD POWER YES NO VALVES LOCKED N/A YES NOLINES CLEARANCE (10'+) YES NO TAGS HUNG N/A YES NO

OVERHEAD WORK OR FLOOR OPENING PROPER EQUIPMENTFIXED BARRICADES YES NO MANLIFT N/A YES NO(TAPE) DANGER N/A YES NO FORKLIFT N/A YES NO(TAPE) CAUTION N/A YES NO TRUCKS, TRACTOR ETC. N/A YES NOBARRIERS N/A YES NO HAND TOOLS N/A YES NOSIGNS N/A YES NO HAND POWER TOOLS N/A YES NOTRENCH & HOLE COVER IN GENERAL

PLACE N/A YES NO TRAFFIC WATCH N/A YES NOHANDRAILS/TOEBOARD N/A YES NO PERMIT & STARRT CARD N/A YES NO

DISPLAYEDREMARKS:

SUPERVISOR: SIGNATURE:FOREMAN: SIGNATURE:

EMPLOYEE NAME: ID # EMPLOYEE SIGNATURE:

2

4 5

6

89 .

10-

12131 ...... . -

2 1 _ _ _ _ _ _ _ _ _ _ _ _ _ __ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

ANN-EX 2

ANNEX 2. WASTEWATER QUALITY MONITORING SCHEDULE

Parameters Sample | Frequency Agency Total Costs forIdentity | Manila Water

I___________ (PhP/month)TOT=46,961 .00

pH Influent, quarterly DENR 14,696.00Suspended solids effluent monthly MWSSDissolved Oxygen RegulatoryBOD5 OfficeCOD weekly Manila WaterOil & greaseResidual ChlorineTotal ColiformFecal Coliform30-Minute settling Sample daily Manila Water 25,080.00test from

Aerationtank

COD effluentResidual Chlorine effluentDissolved oxygen Return weekly Manila Water 2,640.00Sludge Volume activatedIndex sludge,Settleable Matter MixedSuspended Solids liquorTotal Solids tankspH Raw monthly Manila Water 4,545.00Suspended solids sludge,Cyanide DigestedCadmium sludgeChromiumCopperIronManganeseLeadZinc

ANNEX 3

ANNEX 3. ENVIRONMENTAL COMPLIANCE CERTIFICATE (ECC)Republic of the Philippines

Departmcnt of Environment and Natural ResourcesNATIONAL CAPITAL REGION

~i O. ;e1 .'.... : t 5 Congressional Avenue. P -ject a. oj!ezon City7-t1 Nj-.. 926-09-29 - 926-09-07

,M%U.-2000- W. - 19 -0289-2112009- 284 -'RS - 211

ENVIRONMENTAL COMPLIANCE CERTIFICATE

DENR-NCR hereby grants Environmental Compliance Certificate(ECC) for the construction and operation of the Nine Units of CentralizedSewage Treatment FPlant project of Manila Water Company Inc. (MWCI)located in Karangalan Village, Pasig City after complying with theEnvironmental Impact Statement (EIS) system requirements as prescribed in theguidelines of the implementing Rules and Regulations of Presidential Decree1586.

This Certificate is issued to the following STP projects

Treatment Plant No. Location -Capacity(m 3 'd)1 Blk. 31 (bounded by KayurnangilK-17,'Karunungan) Phase 1A 8612 Blk.63 (bounded by Kaayusan/Kalayaan/Karunungan) Phase 792

iC3 Blk.84 (bounded by Kaayusan!Kabanalan1K-441K-45) Phase 961

1B - _ _ .4 Blk.58 (bounded by KabutihaniKatipiranrK118) Phase 2A 9455 Blk.21 (boundedby KagatinganiKapatagan.iKaalaman)Phase 435

28136 Blk 128(bounded by 318

KauniaranfKakisiganiKalakasan/Kasinupan).Phase 2C17 Blk 14 (bounded by Kaataman/KapayakaniKatiyakan)Phase 357

282 1

8 Blk 61 (bounded by Kaluwagan.:Katimugan/KC-25?KC- 74221)Phase 2C2

9 | BIk 81 (bounded by KC-36iKC31!KC35)Phase 2C3 588

subject to the following conditions:

I. PRE-CONSTRUCTION AND CONSTRUCTION STAGE:

1. That all amenities/utilities (e.g. recreational areas, parking areas, drainagelines, paved areas, etc. ) affected by the project shall be immediatelyrestored and rehabilitated:

Waania 'Water Company Inc.N-2000-° -.P>_#-0289-212009-284-'S-2fl

2. That the proponent shall conduct orientatlon for resident engineers andconthactor who will undertake -and implement the project to apprise themof.the conditions/stipulations of this ECC'aand the necessary measures thatwill mitigate adverse environmental impacts and submit report withinfifteen (15) days from date of orientation;

3. Thiat a billboard measuring 0.5 meter by 1.0 meter, bearing NCR-2000-n- - rq__-0289-211 Issued pursuant to P.D. 1B86" shall be displayed

in a conspicuous-location at'the project sitefor identification and guidance;

I. OPE-RATION STAGE:

4. That adequate maintenance procedures shall be undertaken to avoidemission of objectionable odor from said facility;

Ill. OTIlERS

5. That all the proposed environmental management measures contained inthe Environmental Management'Plan shall be effected;

6. That.should adverse impacts occur as a result of project operations, all theactivities, causing the same shall be immediately stopped and remedialmeasures shall be effected and all damages to life and properly shall beproperly compensated to all aggrieved-parties;

7. That in case of abandonment or indefnite work stoppage, the projectproponent shall submit a written notification thirty. (30) days before thescheduled abandonment/work stoppage and :institute protective measuresto prevent adverse environmental impacts that may.be caused by theproject,

8. That restoration works/grading of the exposed grounds shall' beimmediately undertaken for safety , enhancement and ecologicalpurposes;'

9. That this Certificate shall be posted in a 'conspicuous place in theAdininistration's Office.for easy reference and guidance;

10. That the proposed Environmental Monitoring' Program must beimplemented, the report and/or result under oath of said monitoringshgill:be submitted to this Office-annually;

11. That a written notification shall. be made -to the DENR-NCR for approval, incase the project proponent 'cannot comply with any of the conditions fortechnical reasons; and

!Mani( Water Compary Inc.NC-2000- nj -_fL._-0289-2112009-284- q1'5-211

13. That the project proponent shall allow DENR-NCR personnelwith proper identification card and travel/mission order to conductinspection/monitoring of the project without prior notice to overseecompliance to ECC conditions.

Non-compliance with any of the above stipulations and/ormisrepresentations in the IEE submitted by the proponent will be sufficient causefor the suspension or cancellation of this Certificate and/or imposition of a fine inan amount not to exceed Fifty Thousand Pesos (P50,000.00) for everyviolation thereof pursuant to Article IX, Section 6.0, DENR Administrative OrderNo. 37, Series of 1996. This ECC is not a permit rather it is a certification thatthe proponent has committed to undertake or implement mitigation measures toreduce the negative impacts to acceptable level.

Given this _ day of ; _ 00_

CORAZON C. DAVISOIC, Regional Executive Director

Recommending Approval:

SIXTkd_4TINO,JR.Regional Director for Environment

ANNEX 4

ANNEX 4. MANILA WATER PCO REPORT FORMAT

Pollution Control Officer'sReport

Period Covered: Quarter of 200_

General Information

Name of Firnm: MANILA WATER COMPANY

Plant Address:

Nature of Business: Utility

Plant Category: 1. 0 Air Pollutive 2. n Water Pollutive 3. LI Air& Water Pollutive

NOTE: Sections To Be Filled-up. For Categoryl, Sections A & C; For Category 2,Sections B & C

And For Category 3, Sections A, B & C.

A. Air Pollution Aspect

A.1. Process Equipment

* 1 2 3 4 5 6 7 8Air Pollution Hrs. Air Pollution Hrs. Air Cont. of Disposal

Source per Material Control per Pollutants Air of CollectedInstallations Qtr. Processed Facilitie Qtr. Monitored Cont. Solid Wastes

I - Name of Air Pollution Installations 2- Number of flours of Operation of the Installations Duringthe Quarter

3 - Name ofMaterials Processell by the Source Installations 4 - Name of the Pollution Control Device of the Installations

5 - Number of llours of Operation of the Devices During the Quarter 6 - Name of Air Contaminants Nionitored

7 - Concentration of Air Contaminants Emitted by the Installations 8 - Name the Collected Solid Wastes and Means of Disposal

A.2. Fuel Burning

* 1 2 3 4 5 6 7 8Air Pollution Hrs. Air Pollution Hrs. Air Cont. of Disposal

Source per Material Control per Pollutants Air of CollectedInstallations Qtr. Processed Facilities Qtr. Monitored Cont. Solid Wastes

I - Name of Air Poliltion Installations 2 - Number of Hours of Operation of the Installation Duringthe Qutarter

3 - Name of Mlaterials Processedi by the Souirce Installations 4 - Name of the Pollution Control Device of the Installations

5 - Nuimllber of lHouirs of Operation of the l)evices During the Qluarter 6 - Name of Air Contaminants by thc Installations

7 - Concentration of Air Contaminants Emitted by the Installations 8 - Name the Collected Solid Wastes and NMeans of Disposal

B.1. Sources of Wastewvater

Sources Quantity

I . Domestic 19,820 m3/ d

2. Process 200.0 m3 I d

3. Cooling m3 I d

4. Washings: Equipment 2.6 m3/ d

Floor 2.0 m3/d

B.2. Wastewater Treatment Process

* Treatment Scheme

Indicate ivastewaterfloiv diirections and rates and the different units involved in the process.

WAS RAS

i.IInfluent WE ELPRI. SEDIM. C.ARIC SEC.SEIv

Sludge Cake E4?VNBDDIGESTER CH-LONF 11Cn Effluent

* Design Capacity of the Wastewater Treatment Facilities m3 I day

* Operation of the Treatment Facilities:

Average Hours/Day 24

Number of Days During the Quarter 92

* Slhiue Management

Quantity Produice: m3 / day

Method Used for Sludge ThickeningMethod Used for Sludge TreatmentMethod Used for Sludge DisposalFrequency of Disposal

B.3. Wastewater Characteristics

lIttach r esullts ofthe monthly phlsical and chentical laboratoiy analysis on the IYTP efflutent.

Physical & Chemical Analysis include the following:

Parameters Results

Color Color Un

Temperature

pH

Suspended Solids mg

BODs mg

Oil/Grease mg

C. Maintenance & Repairs Works (Indicate any breakdown on the air & water pollution installationsproblems encountered in the operation; repair & maintenance works undertaken & improvements made on thecontrol devices.)

Submined by: Attested by:

ANTONINO T. AQUINOPollution Control Officer President

Quality and RegulationLaboratory ServicesAnalytical Services

RESULT OF ANALYSISAC-01-03-012AT-01-03-013

Source of SampleSubmitted byCollected byDate/Time CollectedDate/ Time SubmittedAnalyzed by Analytical Services Personnel

PARAMETER(S) RESULT(S)LIMIT(S) INFLUENT EFFLUENT

Color TCU 150.00Turbidity NTU -Settleable Matter mUL 0.50Suspended Solids, 103°C mg/L 70.00Dissolved Solids, 1800C mg/L -pH 6.50-9.00Dissolved Oxygen (DO) mg/L -Biochemical Oxygen Demand (BOD)s mg/L 50.00 _Chemical Oxygen Demand mg/L 100.00Surfactants (MBAS) mg/L 5.00Oil and Grease mg/L 5.00 _Phenols mg/L 0.10Cadmium mg/L 0.05Chromium (Cr'0) mg/L 0.10Copper mg/L -Cyanide* mg/L 0.20Iron mg/L -Lead mg/L 0.30Manganese mg/L -Zinc mg/LResidual Chlorine mg/L -

BACTERIOLOGICAL EXAMINATIONTotal Coliform MPN/100 ml 10,000Fecal Coliform MPN/100 ml -

Sample analyzed as submitted eur-equipment under repair Analyzed qualitatively

Certified Correct: Ong. Sgd.ELIZABETH P. SEVILLENO

Sr. Quality & Regulation OfficerDate Test Report Issued:

This report may not be reproduced in full and may not be used for advertisement or litigation purposes without permisssion ofMWC.This report is certified to have passed the MWC Quality Control procedures for reporting of analysis results.

ANNEX 5

ANNEX 5. SAMPLE MONITORING SHEET FOR EFFLUENT QUALITY

Quality and RegulationLaboratory ServicesAnalytical Serjices

Ctrl. # LE-00-06-004

RESULT OF ANALYSIS

Source of SampleSubmitted byCollected byDate/Time CollectedDate/ Time SubmittedDate AnalyzedAnalyzed by Analytical Services PersonnelAnalytical Methods Used : Electrometric 2Cobalt-Platinum Scale, 3Gravimetric, 4Azide Modification,

Open Reflux Dichromate, Multiple Tube Fermentation Technique

PARAMETER(S) LIMIT(S) RESULT(S)

pH' Units 6.50-9.00

Color 2 TCU 150.00

Suspended Solids3 mg/L 70.00

Dissolved Oxygen4 mg/L -

Biochemical Oxygen Demand 4(BOD)s mg/L 50.00

Chemical Oxygen Demand5 mg/L 100.00

BACTERIOLOGICAL EXAMINATION 6

Total Coliform MPNI100 mL 10,000

Fecal Coliform MPN/1 OOmLREMARKS: Sample analyzed as submitted

Submitted by: Certified Correct:Original Signed Original Signed

MA VIRGINIA B. PINEDA ELIZABETH P. SEVILLENOSr. Analyst Unit Head, Analytical Services

Date Test Report Issued:

This report may not be reproduced in full and may not be used for advertisement or litigation purposes without permission ofMWC.This report is cerified to have passed the MWC Quality Control procedures for reporting of analysis results.

-ANNEX 6

ANNEX 6. ENDORSEMENTS FROM BARANGAY CAPTAINS

11PPUTh2C OF THE PHILIPPINES

.1AN(CJGG.AUAN lAItIANGAY COUNCILPASIG CITY

4 September 2000

To vjhom it may conc-rn:

With the privatization of W,wSS, Manila Water Company, Inc. (MWCI) wasgiven the right to exclusively provide water and sewerage services to theEastern part of Metro Mlanila. In line with its service obligations, the MWCI haselected to upgrade the sewerage system of Karangalan Village.

WHEREAS, the sewerage system in Karangalan Village requires repair andrehabilitation due to design considerations and degradation caused by naturaldeterioration;

WHEREAS, the present condition of sanitation in the area may present hazardsto the health of the residents of the community;

WHEREAS, the existing sewer treatment facility needs to be upgraded so thatthe wastewater effluent will rneet environmental standards;

WHEREAS, the MWCI commits to upgrade the sewerage system and improvethe sewer treatrnent facility of Karangalan Village;

-WHEREAS, the MWCI commits to obtain the Barangay Council's concordanceprior to commencement of excavation and related civil works for vwhich MWCI willtake full responsibility, inclusive of restoring the site to Rs original condition, and,

In recognition of the impact of this project in reducing the pollution load to theLaguna Lake, as well as the accompanying benefits to the community, 1, theundersigned, on behalf of the Barangay Council, hereby give my support andfavorable endorsement for the irnprovement of the sewerage system of phase(s)of Karangalan Village covered by Barangay Manggahan, Pasig City.

Respectfiilly yours,

(RIS S.C C ZBa ngay Chl af

tMan gahan. Pasig City

RE2UBL.IC o0 TIIE 1HIIIPPINESBARANGAY DELA PAZ COUNCIL

CITY OF PASIG

24 August 2000

TO WHOM IT MAY CONCERN:CRESENTA S. VICTORIANO

Hirgy.Chairwoman I Wlh the privatizatlon of MWSS, Manila Water Company, Inc. (MWCI)

was given the right to exclusively provide water and sewerageservices to the Eastern part of Metro Manila. In line with Its serviceobligations, the MWCI has elected to upgrade the sewerage system ofKarangalan Village.

SULPICIO M. PADUAL};agawad , WHEREAS, the sewerage system in Karangalan Village requires repair

and rehabillatlon due to desin considerations and degradaton caused| by natural deterioratbn;

MANUEL A. FLORES

Iagawa4 VIWHEREAS, the presert conditlon of santatlon in the area may presenthazards to the health of the residerts of the comrmunty;

KRARwad WHEREAS, the existing sewer treatment facl0ty needs to be upgradedso that the wastewater effluert wil meet environmental standards;

DEOGRACIAS R, VELUZ WHEREAS, the MWCI comnits to upgrade the sewerage system andKagawA d improve the sewer treatment facility of Karangalan Villag e, and,

In recognition of the Impact of this project In reducing the polltion load toARSENIO N. TANCHULIN i the Laguna Lake, as weD as the accompanyi benefits to the

]aLuwad communty, 1, the underslgned, on behalf of the Barangay Council, herebygive myy support and favorable endorsemert for the knprovement of thesewerage system of phase(s) of Karangalan Vdlage covered by

FABIO J. ENRIOUEZ Barangay de la Paz, Pasig City.kagnawad l

a Respectfully you's,

PONCIANO U CALAYAGKagawad lA.c 5D

CRESENTA S. VICTORIANOBarangay Chairwoman

PAUL ARIS A. ANGULUANSK Chairman

ZENAIDA T. SANTOSBrgy. Secretary

HELEN T. LACSONllrgy. Treaaure-rj

Repilhfic ot the Philippines

Prnvince of Rizal\l uinicipa;liti nl C:iinta

[I3AIRANC;AY SAN ISlI)DR)(A)_

OFFICE OFT 1l1 PUNONG( BARANGAY

_o i . .r..-_j. ..

J5)fil: A (; TVI-il:lHi 7 Au gu- 29, 2000

fii. SiX-, T0TI TN1 0ROD)(O)l.H) DE. -:St's Dire^tcr, DDNR NCRiKa';"';iJ Quezon City

ERNESTO C. l)EIA ROSA Dear Sir:

With the privatization of MWSS, Manila WiaterCompany, Inc. (IwCI) was given the right to exclu-sively provide water and seweraze services to the

ROOIBERTO C. SANrOs Eastern part of Metro Manila. In line with itsKaaiwad sevice obligations, the MWCI has elected to upgrade

the sewetage system of Karangalan Village.

FELINO 1I. SANI'OS Whereas, the sewerage system in KaranEalan Vil-lage requires repair and rehavilitation due to de-sign considerations and degration caused by naturaldeteriorAntion;

III'iRIFICACION J. FI):.A l'AZKaga.\3;l ~'hereas, the present condition of sanitation in

the area may present hazards to the health of theresidents.of the community;

IIFROSIT() 1'. FERINKzi~a-,%ad Whereas, existing sewer treatment facility needs

to be upgraded so that the watewater effluent willmeet environmental standards;

ANTON IO S. CRU/.Whereas, the PlaCl commits to upgrade the sewerage

anu improve the sewer treatment facility of KarangalanVillage, and,

ROSEMARlII:E .SANI'OSRaratn,wvT,easurer In recognition of the impact of this project in

reducing the Dollution load to the Laguna Lake, aswell as the accompanying benefits to the community,I, the undersigned, on behalf of the Barangay Council,

EIRNESO Q..JAIME.SP. hereby give my support and favorable endorsement forBari-,-iv;Seccictar the improvement of the sewerage system of phase (s)

of Karangalan Village covered by Barangay San Isidro,C-inta, Rlzal.

Re 1 1 g rs,

ANNEX 7

ANNEX 7. MEMORANDUM OF AGREEMENT (MOA) MWSS AND THE NATIONALHOUSING AUTHORITY

\1 IKORAflDUl1 OF AOREEIZEIMT

KI CAJ) Ail '!'-:. MiESHC PRESE1TS:

'Th wj'radeIE e'.ode wnd enLe:ed :;rO ti-i: _ _

J z ty nd bL)e L .J' I

T' he NJATIONIAL IlOIJSIIG AUTHORITY h

, 0 govepz.e:en: corporatL Iol creeted &ndC. e: ing undel onid by virtue orPreuident.iel Decree Ilo.757 with prIncipsIolfle~e esddrete at; D linen. QuezonCi t,'. reprecen,ied hercein by Ite General

i1R. ROBERtT P. PALAO herelnefter-.referred to ae the IIHIA.

-and-

TIhe IIETROPOLITAN WATEIIWORKS AiJDSEWERAGE SYSTEM, likewlae a governinentcorp..r&tlon created snd exNitanl by'virtue of Republic Act 6231, ee a.mended,wlth principal office addreee at Balara,i9 Dillmon. Quezon City, repreaented herelnby itC Adrni.iintratoi tIR. RUBEN A.IIERNAtNDEZZ hereinafter ruferred to ae the

-Witneseeth that-

WH -Iil E, illiA thlrouglh thr-e prtlc 11ti.n of illa.;; i dectOva d h,e develolped Ktatigutsion Vilage PvoJeot. sa the

}itl>s Public F.lce3 bnd ServvlCdea ('POlnent Idenir icki n tildeTlilrdi Urbaxn DevevloPment- PIroect;

WIIETREAS, ItMSS,. under 1.hu Loan A31) t eenL tnmd theallbaldlazry Loonl Aareennetr exeeuted by enJ be.twee) theGovernment of the Reputblic of the Phillprnloe,o ind WorldBenk on .3une 2,1 98O woo n.inLactc t ro rtL Ic) Ipte ro,;enaure abdl..tntaC fine%ncinid, ao1iil'nlatLEtion , opeve,tLlon an(dina iftInaanc.t Of Lled we Lter - wd.I dCw-'I n'-o3teumd.3, or thepl oject.;

IW1IUhLAS. MIA, atter comnpletlon of cjhe pro1ect. in;r,nclated to Lti over/tvtnafer the *e: eE r and newermyatemfn III ftivor of 1IIUSS ptvouinart to-, lh - elatIng Ilw3,

< x~~vtteij 6n.l reatiPLltnz)3;

C:, WHIHERE:AS. I;WSS 1 L) Irillintedl by Lecter tf Intent: o, lRI. -101 to upeLste 311d inl8aII) c I he a torenaIdA ] u; faciCii eIL 'ommm1On>elln tzJ nd Iote amabject or th10

- 'v =I;OW. THEREFORE. for tnlit In coneal de,atlon of che; foregoing pr eineu, the el.ove PAI- clea do heel:.y Iincd

lt.heilmeelvas mind odm'ee to the following termn eiIl° oncl It ri c.hc,:

O / - o 'JeE 1'

AH'TICI.E I

Co SC.OPJE_FJI1,RmEEU

\ h1e, p:rtlen: lhereto ogree tht C thin He&orancdum of -Agreement, covero n project of com'lete rehabilittstion ofninle (9) eawtge litf atatlono ac ai-amngalnn Vtilo ae /amoint inl to Three M1111ion Six Hundred Four Thoutand One\ Hlunred El glity 11 ne Ptesoe and Twen:y-Nint- Centavon(P3,60-1,189.29) whIch lncludeo repaIr of aervice

: entrano,zs motor controln. other releated electrical. works . Ileplacnnent of eigliteen ( !6) pumpa na well on

otler acceeeoriee and labor coot.

ARTICLE II

RQLAD_RES PnjHaIjLL3ELr7EJi2s nE TIS ART_U

Section 1? RESPONSIfTLITIES OF NIllA

a. Entruat the amount of Three Million SixHundred Fout Thout3and One ihindred EightyIille PeisoB And Twenty Illne Centavoe

>; (P3,604,189.29) to IIfWSS for the tpecific,rpurpoee of utilizins the Flve llundred

_? Th I1h rty Foui ThoLitiegnd EIgh t Hundredi; ); ' Eleven Pecos and Twenity Nine Centtvos

(f53'12 11.211) for the electlIetal workaLnd Three M1illion Sixty Illne Thoueand

Three Hundred Seventy Eight Peaos(P3.069.378.00) for the replacement ofe ighteen (18) eubineraible pumpe end

c O other acceooriets.

b. DitsbLIurte thei imount of Po36041,189.29 to1--IWSS in one I ) P1)ayment upon iainina ofrtie Memora,ndum of Aareeun,nt &nd/or

iihiatever riemalintnd coot h nreur'red toe.j perltiolbl Ize the teyacen y

C. PvOinedte. Lthe rictl roultionLa ofla M Conito^the th etincl al worlto o,f(i HeLCO weaCrbmeate alt ic mr.p3 oilt oitter zie forieteIlc:ueLlOb! Y t.,: c:6111"16.e.= El-,: I"Al!JllrlatitollC, f II i fit: ( 9) ! ewa ge l ifL c i Lta l. i o in toio per tla I le a the LeewEng OiiIe di eponLii.

d. k7oriinate Lthe porticiputlold of MERALCOInI 1 le I natt,1 lt ionl C.f HE'HI.H\CO power

- . .'. ~~~~~~~~~~~~~~~Cr'aarc (I d aposol C::ollill) It L C fol- th6[-~~~~~~~~~~~~~~~~~~1" I; r. I nrill , air z e l ilg ,ofil;el(I cwwl kI a ,-,Otj It Lol

q 0, ... z. of :aLe unc IIt,lo to~ 1 b II I) I e d - 0ut ln-. .,71 .... tile pirojcet, akibject to COA rulea and

-. - ,iver ,

f r Tronofer the OeWar a:,'dtemn of th, /o a .a ran s glan Villape plro.ec to tlWSS after

completion of worit.

t SECTION LI i'_S,OISIimILIvrES OF [¶WSS

aD ) Purchoae materiaIl and undertakerehabilitation of electrical works andIreplnceinent of eighteenLi-8) submersiblepumpo and other acceasorlen tooperatlonalIze the aewerage nyatern Ina3ccordance withi MiSS 9tancdards.

,. . 1 l, Act an worka englneer for thc-C! 4 ) completion of the rehabIlitation of nine

-9) bewage lift Btn:1one and aewerogeo ye tern.

c. Undertalie and conmlete rh&abIllta tlon0 C worke within aixty (60) calendar daye

u-pon av'aliabillty of purchnaed materlalsiancl to Bubmit actual work accompllehmenton a weekcly bama as certified by the

5accountable HWSS officiale.

>u ti. 1Ianage the awarding snd implementationof the contract In 6ccordance with

U .A+\ e axlsting lawa, ruleo and regulations.

.e Commence the implementatloni of the' woricouiponl rece Pt P In flill oC the fnlld

e mNg) sentIoned in parag3rnp)h a, Section 1 of9 R o t.this 'Article ftom IIIA.

2 f. iCoordinate with IIIIA xerrtaentncive/s:' throulghout the irnipen;entat I o of the

/*ss rehi, iii F btalt5Oi} onwontl' nd Li t-IIurn oVelvr a ___ LIhe replac ed oubmere>Ible pumps and

acceavories to the I itIonal louningAuthor Ity.

Li. 5ubIllt ,finai accounting of the entrtuted° furWI,tnd ad colt It I cd ; o,rreft by I1WiSS

t-tnaigelltell t ... :-'WSS Manager.> X ~ ~ ~ ~ ~~~~Acu A_>t I t1n L'e partmbleiif . 1t and diii

vtrvtiled bs IMISS Covrpcivte Auiditor.' 7\ Tni COdtI t-he perIodI of eIC"t I 60)

: ) endeorlal dn,ye Ic not r nl f Iclet. 10*:c,inplet e tlie2 lsehatbI IItat Ion1 woi;kef forswhatever reacon, a thirty (3()-diaye:e t.e j I e .ni uIi , 1 l b tItOmt I C l 1 ) ' dranted

:t *;, HsIiS t ......... :,i~ (ole il;c *Iz- dOinC .I f IIWSSg < ' st~~~~~~ill) tul in o co;IipietC thl. wclg'iIC with in)

{: _ 2 the caicI t.line xenXtCI n1. r.he IMSS lsf _ obi _ged to - r5t;11t ,i. te,urn thle remna In I n fuLnd tci

MIIA wIthin thirty (30) czal nIer dayatw1tholit t,ny lteve rcat chIr ge.

0 vt',

zC

1. er't the sewel ce. Ie, ;- C he rrc.IoIII:-pon Comipletlo,n of wO'rke,.whic:h le tc. ;e

form6liz,cI In la PEED OIF TRANS'FJRE.

ATI'l CLE IIIEif lALTh u_tLl2

Th)j1. I-leinut anuitin of Agireeiment shal t.ake effectupon aligning hereof co C ln Tail1 Colntinle Iii tu11 foroe andeffect until completion) of the pro?ect. clbec! vesme n t l o n e lie her1in. S'ame 1ma ybe lo'dt e-I r e pele.Ealtred tl o01 ex tel)ded on1 y' by InUt.u wV I t.tnrll eement. ,f

.o t. part.le 3.

If for any reeo-on, aniy provislon of thia agreement.in t~foutndL invall:i, contrtry to law or pulbi z poliIcy, orbeyond -tha c-ope of aC%uthorlty of thle aignl:ries herein,the remal nder, hlereof not. ftffeote.: Oo I ll Intitle 1nforce andci effect.

I ll WITNESS 'fllFREOF, thlie part tleo Iave hereuntoaffix:eh thelr algnatilvea t.hiX _ (a dy r -_1994 1t D f)Jllman, Otuezoni Cl y.

NATIONAl. HOUSING AUTHORITl'Y IETrr{O[POLI TAN WATEFWORKiSAtND SET FAGE 5YSTEtI

r)~~I - a3 *I oa,

llltoil(t) DA L3AOS [Ru I A . 1113PIAlND)lZ

'I-,~~~~~~~~~''l

*Ie,,J tL L-10ift.11c,- >8fi;il1>y

I p PPIiROVJ EIS ':5T' ;J!I : l')F TH: IIE RCIIA,r

U1,1I1I'It A. 111'11:1NAND1)U0,7 -7

AG\yJELEIXTLE ENT

\\URT OFI-:)B.( [ TIIElll- 1ILIPPMiES)QUEZOI! CITY ) .5.

Peforoa me, ui llotary Public fotr end in Cuezon City'r- pereonaLly nppenre(l:

-o ° I(SOBM:r 1). YIALAO RtJl3E:1 A. I1ERlHANlDEUGeneral H-Ionagel' Admilnltr5tor

I-' W eilIatiGc,n8l AloLiving Aithorltv Hletrnpol 'tan '.aterwo-crhaand Sewer-age Syttcm

A I => Conmi. To:-: Cert. Uln. 3582131 Coomm.Tax Cert.1.1c,. 3' 7579 A|SD l.etrlied AL; Quezoir CIty Iticued nt Qhiezon CliI:i'v onued on Feb. ''3, 1 991 leaiued on 11y.3-0, 199.1

.AlI isnown to ine aicd r.n mO known to he the: eamepernono who exectited the foregoing Inatrtuinrent allnda ockn owIe g ed to me t01w% the came ln hileI t f Iree an1(voluntary CL t and deedt o we ll no the el) r 1 t eto theySe!Jpect lve II, eprecsent,

T'm foregolnu Inzitrrnmert veiera to 8 Ilemnrandum ofAgreement. c alaulna eting of Live (5_ pagea. lncludliiLn cilia-; rJ p)aeR On whiCh the l citnow Iedment Id ar iten, aignect byche prtA tea aend tche Ir Inartxiriente I w I tnlceee ancid aeo I(-by mly not eeral aeii. -r

W \' I WIESS I/ IIHAMD AdID SEAL, thin - __ dlay ofo . _____________________ , 199-1I, L Ot io::on Clity.

-.'

OITIAR1Y P1Jl.LIC(

C)tP 3 I Irlcr i,1 ;;) ~~~~~~~~~lne r l eb or 1 9 .| _______:!;_ '- .^ l r.P lccl [IC,. ~~hook (Ia. 2 ~~~~~~~~~ ' "' "'- "

~~jv. ~ Seriecof 19r,"!' i T

(D~~~~~~~~~~~~~~~~~~I

I-.Rs

_.

1)_ .Ci

. .

ACCOUNTABILITY STATEMENT OF THE PROJECT PROPONENT

This is to certify that all the information in the enclosed InitialEnvironmental Examination (IEE) are true, accurate, and complete. Should welearn of any information which would make the enclosed IEE inaccurate, we shallbring the said information to the attention of the Environmental ManagementBureau (EMB) of the appropriate DENR Regional Office and the EnvironmentalDepartment of World Bank.

VWe hereby bind ourselves jointly and in so!hdarity with the preparers forany penalties that may be imposed arising from anv misinterpretations or failureto state material information in the enclosed IEE.

In witness whereof, we hereby set our hands this 2 1 st day of December2001 at Quezon City.

Manila Water CompanyProject Proponent

by:

Antonino AquinoPresident

SUBSCRIBED AND SWORN to before me this 2 1St day of December2001, affiant exhibiting to me his Community Tax Certificate No. 05959688issued on January 12, 2001 at Quezon City.

Notary Public

Doc. No. ' a.Page No.Book No. .... ~., Series of 2001

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