Eco Mark Product Category No. 151“Johkasou (domestic wastewater treatment tank)
Version1.0”
Certification Criteria- Applicable ScopeJohkasou (Applicable to a combined treatment Johkasou capable of covering upto 10 persons)

Established:

December 1, 2012

Japan Environment Association

Expiration date:November.30, 2029

Eco Mark Office

NOTE: This document is a translation of the criteria written in Japanese. In the eventof dispute, the original document should be taken as authoritative.

151V1Criteria

Eco Mark Product Category No.151“Johkasou (domestic wastewater treatment tank) Version1.0”
Certification Criteria
Japan Environment Association
Eco Mark Office
1. Purpose of Establishing Criteria
Omitted.

2. Applicable Scope
Johkasou (Applicable to a combined treatment Johkasou capable of covering up to 10persons)

3. Terminology
Omitted.

4. Certification Criteria and Certification Procedure
Criteria items (1) to (8) shall be complied. To show conformance to the individual criteria
item, the respective Attached Certificates shall be checked/filled in the correspondingboxes, stamped with the applicant company seal and submitted with other required
documents.
4-1. Environmental Criteria and Certification Procedure(1) A septic tank shall be of an advanced treatment type that has the BOD removal
efficiency of 90% or more and a performance evaluation value of effluent quality of BOD
20 mg/L or less, and total nitrogen concentration (T-N) of 20 mg/L or less or total
phosphorus concentration (T-P) of 1 mg/L or less.
[Certification Procedure]
An applicant shall enter necessary items in the Attached Certificate and submit amaterial (a copy of any of a performance evaluation document, minister authorization
document, or model conformity certification document) demonstrating that thetreatment capabilities described above have been satisfied.

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151V1Criteria(2) The electric power consumption of the Johkasou shall satisfy the energy saving
standard in Table 1. However, this item shall not apply to a phosphorus removal type
(T-P 1 mg/L or less) or membrane separation type (BOD 5 mg/L or less).
Table 1 Energy Saving Standard
Number of Persons toPower Consumption
be Covered(Rated Output)*Five-person tank
52W or lessSeven-person tankTen-person tank

74W or less
101W or less

*If power consumption differs depending on whether the frequency is 50Hz or 60Hz, the Johkasou shallmeet standard values for both cases.

[Certification Procedure]
The applicant shall enter necessary items in the Attached Certificate and submit amaterial (specifications, registration of the Zenjokyo (National Johkasou Promotion
Municipality Council), etc.) that shows power consumption of a device (blower, etc.)
using electric power. In addition, if the applicant uses more than one blower for a
Johkasou of model 1, the applicant shall submit a material that shows a guaranteedvalue of power consumption, a control method thereof (specification of power
consumption of the blower, etc.), and power consumption of each blower that is in use
at the time of application(3) The Johkasou shall meet one or more of the following a. to e.:a. The treatment capability of effluent quality shall be higher than that described in 4-1.
(1).
The Johkasou shall be of advanced treatment type whose performance evaluation
value of effluent quality is BOD 10 mg/L or less, and whose T-N is 10 mg/L or less orwhose T-P is 1 mg/L or less.
b. The power consumption of the Johkasou shall be reduced by 10% or more from theenergy saving standard of Table 1 in 4-1. (2). If the power consumption is reduced bycontrolling operating hours of the blower (such as by intermittent operation, etc.), it
may be acceptable if a converted value of the rated output (in the case of a 24-hourcycle: Rated output x operating hours of 24 hours/24 hours) corresponding to unit
time meets the standard.
c. Size of a Johkasou body shall be downsized and meet a standard value of the total
capacity in Table 2.
In addition, matters that are desirably to be considered in downsizing are defined in
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Section 5(3).
Table 2 Standard of Size of Johkasou Body
Number of Persons toTotal Capacity
be Covered
Five-person tank
2.2 m3 or lessSeven-person tankTen-person tank

3.1 m3 or less
4.5 m3 or lessd. The Johkasou shall be a tank that can be used with a disposer.
e. It shall be a Johkasou mainly made from plastics. The percentage of weight ofrecycled plastics in the total weight of plastics contained in components of an entire
product shall be 25% or more in case of post-consumer material and 50% or more incase of pre-consumer material. If post-consumer material and pre-consumer material
are mixed in recycled plastics, the following expression shall be used.
Weight of pre-consumer material
Total weight of plastics(%) ×12＋Weight of post-consumer material
Total weight of plastics(%) ≧ 25

[Certification Procedure]
The applicant shall enter the choice in the Attached Certificate and submit thefollowing materials:
For a., certification in Section 4-1. (1) also serves the purpose.
For b., certification in Section 4-1. (2) also serves the purpose. However, if the control
of operating hours of the blower is also involved, the applicant shall have obtained theminister authorization with a predetermined control method. In addition, theapplicant shall also submit a material that shows a basis of calculation of power
consumption.
For c., the applicant shall submit a material (specifications) that shows size of theproduct.
For d., the applicant shall submit a material that shows that the treatment
capabilities in (1) above are satisfied by water discharge to which water discharged bya disposer is added.
For e., the applicant shall submit a certificate of weight ratio of weight of plastics andthat of recycled plastics in components of the entire product, and a material supply
certificate issued by a material supplier.
(4) The applicant shall have confirmed that the content rate of lead/mercury/cadmium

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and compounds thereof, hexavalent chromium compound, polybrominated biphenyl(PBB), and polybrominated diphenyl ether (PBDE) in the main body of the Johkasou(shell, partition plate, filtering medium, blower) has conformed to Table 3. In addition,no fire retardant of short-chain chlorinated paraffin (the number of chained Cs is 10 to
13 and the concentration of contained chloride is 50% or more) has been added as aformula component.
Table 3 Content ratematerial

Content rate[wt%]Lead and its compounds

 0.1

Mercury and its compounds 0.1

Cadmium and its compounds

 0.01Hexavalent chromium compounds

 0.1

Polybrominated biphenyl (PBB)

 0.1

Polybrominated diphenyl ether (PBDE) 0.1* The content rate refers to the content proportion in a homogeneous substance(minimum unit that can be separated by rule with totally uniform composition).

[Certification Procedure]
The applicant shall enter necessary items in the Attached Certificate, and submit amaterial that describes an examination method (examination sheet, test result, etc.)
to indicate a content rate of corresponding substances in the Johkasou body or todemonstrate that no such a substance is contained, and a material describing themanagement system.
(5) A Johkasou shall be designed in consideration of serviceability such as maintenance,cleaning, etc. of the Johkasou.
In addition, systems for replacement/replenishment of consumable parts, supply ofrepair parts, quality assurance, and repair contract have been prepared, andinformation for this purpose has been provided. A supply period of consumable/repair
parts and a period of quality assurance shall be as follows:- For the main body under normal installation/use conditions, a guarantee period shallbe 3 years or more for the shell/partition plate and 1 year or more for the drive unit.
- For any part that cannot be serviced by a replacement or general-purpose product,
supply of parts shall be ensured approximately for 7 years even when production
thereof is terminated.
[Certification Procedure]
The applicant shall enter necessary items in the Attached Certificate.
For serviceability, the applicant shall provide an explanation, and submit a material
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showing that the Johkasou has been registered with the Zenjokyo (National Johkasou
Promotion Municipality Council), or it has been checked by a performance evaluation
test, etc.
For the systems for supply of consumable/repair parts, quality assurance, and repair
contract, the applicant shall submit a copy of corresponding material that provides
information, etc.
(6) The applicant shall communicate points of concern appropriately to a constructor,maintenance provider, cleaner, and users (Johkasou manager) of the Johkasou. Inaddition, an instruction manual to be distributed to the users shall describe (1)precautions for use (matters that users should keep in mind to ensure safety andmaintain the water quality) and (2) need for maintenance management (maintenance,cleaning, legal inspection).
[Certification Procedure]
The applicant shall enter necessary items in the Attached Certificate, and describe amethod for communicating information (implementation of a workshop on
maintenance management, establishment of consultation service, publication of the
instruction manual on a Web site, information on how to obtain, etc.). In addition, theapplicant

shall submit

construction

instructions,maintenancemanagement

instructions, and instruction manual.
(7) In manufacturing the applied product, related environmental laws and regulations
and pollution control agreement (hereinafter referred to as the “Environmental Laws,etc.”) must be followed with respect to air pollution, water contamination, noise,
offensive odor, and emission of hazardous materials in the area where the plant
performing the final manufacturing process (assembling process) is located.
In addition, the state of compliance with the Environmental Laws, etc. for the last fiveyears from the date of application (whether there is any violation) must be reported. If
there is any violation, it is necessary that proper remedies and preventive measures
have been already taken, and the related Environmental Laws, etc. must thereafter befollowed appropriately.
[Certification Procedure]With respect to the compliance with the Environmental Laws, etc. in the area wherethe plant performing the final manufacturing process (assembling process) is located,a certificate issued by the representative of the business of manufacturing the applied
product or the manager of the relevant plant (entry or attachment of the list of namesof the Environmental Laws, etc.) must be submitted.
In addition, it is necessary to report whether there is any violation during the last five
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years, including a violation subject to administrative punishment or administrative
guidance, and if there is, the following documents in a and b must be submitted:
a. With respect to the fact of violation, guidance documents from administrative
agencies (including order of correction and warning) and copies of written
answers (including those reporting causes and results of correction) to such
documents (making a series of progress clear);b. Following materials (copies of recording documents, and so on) concerning themanagement system for compliance with the Environmental Laws, etc. in 1)-5):
1) List of the Environmental Laws, etc. related to the area where the plant islocated;
2) Implementation system (organizational chart with entry of roles, etc.);
3) Document stipulating retention of recording documents;
4) Recurrence prevention measures (future preventive measures);5) State of implementation based on recurrence prevention measures (result ofchecking of the state of compliance, including the result of onsite inspection).

4-2. Quality Criteria and Certification Procedure(8) The Johkasou shall have received a model certification of the Minister of Land,Infrastructure, Transportation and Tourism. The durability (strength, rigidity, watertightness, chemical resistance) of the Johkasou body shall have undergone the strengthverification by the JIS standard, “Johkasou/Part Standard <Revised Version>(Johkasou System Association)”, or FRP rating, etc. In addition, the applicant shallhave clarified how it copes with the Product Liability Act (PL Act) (taking out a PL
insurance, compliance with “PL Guideline for Model Johkasou (Revised Version 2)(Johkasou System Association)”, etc.).
[Certification Procedure]
The applicant shall enter necessary items in the Attached Certificate and submit a
copy of the certificate. In addition, the applicant shall describe how it copes with thePL Act (a certification seal by Johkasou System Association, etc.).

5. Considerations
In the process of manufacturing products, it is desirable to consider the following items,
although they are not requirements for certification. Compliance with each item shall beindicated in the Attached Certificate(1) In addition to conformity to the choices described in 4.1. (3), the Johkasou shall be
designed to give consideration to further low carbonization approaches (use of sludge as
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151V1Criteriaa resource, reduction of sludge volume, reduction of CH4 and N2O emissions in water
treatment processes, etc.).
[Certification Procedure]
The applicant shall enter necessary items in the Attached Certificate and describe
approaches to low carbonization of the applied product, efforts in design thereof, etc.
(2) Consideration shall be given to reuse or recycling of the Johkasou after use.
[Certification Procedure]
The applicant shall enter necessary items in the Attached Certificate and describe
content considering recyclability (material indication, separability of dissimilarmaterials, etc.).
(3) In downsizing as described in Section 4-1.(3), a recommended value for an
installation area of the main body listed in Table 3, which gives consideration to an
installation area of an independent treatment Johkasou, shall be satisfied, so thatchange of an existing independent treatment Johkasou to a combined treatment
Johkasou can be facilitated.
Table 3 Recommended Value of Installation Area of Main Body of Johkasou
Number of Persons toTotal Capacity
be Covered
Five-person tank
1.9 m3 or lessSeven-person tankTen-person tank

2.6 m3 or less
3.9 m3 or less

[Certification Procedure]
The applicant shall enter necessary items in the Attached Certificate and submit amaterial that shows size of a product (total length and total width).

6. Application unit, indication, etc.
Omitted.
December 1, 2012

Established (Version1.0)

March 29, 2018

Extension of expiration

March 15, 2023

Extension of expiration

November 30, 2029

Expiration date

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The Certification Criteria for the Product Category will be revised when necessary.

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