ANTI TERMITE TREATMENT FOR SOIL BELOW PCC

 ANTI TERMITE TREATMENT FOR SOIL BELOW PCC | RCC MASONRY | BUILDINGS SOIL TREATMENT Post Construction Anti Termite Treatment 

1.  WHAT IS ANTI-TERMITE  TREATMENT

Termites constitute a separate order of insects called ' Isoptera' ( isos is 'equal' and pteron means 'wing' in Greek). Although they are commonly called white ants, they are not related to ants who have a thin waist in contrast to the thick waist of the termites.
There are over 2300 species of termites, out of which about 220 are found in India. All these species are not considered to be serious pests.
According to their habits, termites can be divided into two well-defined groups 
a) Subterranean termites which build nests and live in the soil, and
b) Non- subterranean termites live in wood and do not require contact with the soil.
Pre-Constructional Anti Termite is a process in which soil treatment is applied to a building in an early stage of its construction.

2. WHY ANTI-TERMITE IS PERFORMED OR DONE 

The pre-constructional soil treatment is required to be applied during the construction stage of the substructure up to the plinth level.

It covers the soil treatment with approval chemicals in water emulsion in foundation trenches for columns, plinth beam, plinth filling, at junctions of walls and floor, in the expansion joint, etc. in the stage as per the specification IS 6313 Part-II 2013.

The effectiveness of chemicals depends upon the choice of the chemical, the dosage adopted, and the thoroughness of application. The chemical solutions or emulsion are required to be dispensed uniformly in the soil and to the required strength so as to form an effective chemical barrier that is lethal and repellent to termites.

3. TERMINOLOGY USED IN ANTI TERMITE TREATMENT PROCEDURE 

3.1 - Chemical Barrier -  The layer of chemically treated soil in immediate contact with the foundation and floor structure of a building that kills or repels termites thus forming a barrier that is impervious to termite entry.

3.2 - Soil Treatment:-  The application of chemicals (toxicants) to the soil adjacent to and under a building from a chemical barrier that is lethal or repellent to termites.

3.3 - Pre Construction Soil Treatment:- This is a process in which soil chemical treatment is applied to a building during the early stage of its construction.

4 PREPARATION BEFORE ANTI TERMITE TREATMENT PROCEDURE  

The removal of trees, stumps, logs, or roots from a building site reduces the hazards from subterranean termites. Similarly, the subfloor area should be kept free from all debris in which new colonies of termites might be established. In order to ensure uniform distribution of treating solutions and to assist penetration, some site preparation, may be necessary.

5. CHEMICAL AND RATE OF APPLICATION 

5.1 Which chemical shall be used for Anti Termite Treatment Procedure 

1. Chlorpyriphos 20 EC  as per IS 8944
2. Imidacloprid   30.50 SC as per IS 16131

5.2 What is the basic principle for Anti Termite Treatment 

Chemicals toxic to subterranean termites may be used effectively to check termite infestation in the soil. These are useful in the treatment of new buildings sites and may also be used to eradicate the existing infestation in buildings and to prevent re-infestation. The effectiveness and/or residual activity depend upon the choice of the chemical, the dosages adopted, and the thoroughness of application. Chemical solutions or emulsions are required to be dispersed uniformly in the soil and of the required strength so as to form an effective chemical barrier that is lethal and repellent to termites.

5.3 Mound Treatment 

 If termite mounds are found within the plinth area of the buildings these should be destroyed by means of insecticides in the form of water suspension or emulsion which should be poured into the mounds at several places after breaking open the earthen structure and making holes with crow-bars. The quantity to be used will depend upon the size of the mound. For a mound volume of about 1 Cum, 4 Liter of a water-based chemical shall be used. 

6 CHEMICALS TO BE USED FOR SOIL TREATMENT 

CHEMICAL FOR ANTI TERMITE TREATMENT PROCEDURE
Chemical	Relevant IS Code	Concentration by Mass, Percentage, (Active Ingredient)	Dosage
Chlorpriphos 20 EC	IS 8944	1.0	50ml per Liter Water
Imidacloprid 30.50 SC	IS 16131	0.075	2.10ml per Liter Water

Note-  1. The above-mentioned chemicals are registered (as on date)chemicals with the Central Insecticides Board-Registration Committee (CIB RC). Efforts will be made to update (add/delete) the list of chemicals (Termiticides) as the obtained from time to time from the CIB RC for incorporation in the above table is available in the CIB RC's approved list at any point of time, shall only be used.

2. The chemicals described in this standard are insecticides with persistent action and are regarded as highly poisonous. These chemicals can have an adverse effect upon health when absorbed through the skin, inhaled as vapors or spray mist or swallowed. 

Note: - If need to prepare 100-liter Diluted water than we need  100 X 2.10 = 210ml of Imidacloprid 30.50 SC

And If need to prepare 100-liter Diluted water than we need 100 X 50 = 5000ml or 5-liter Chlorphriphos 20 EC

For below PCC to treat soil we need to spray Diluted Water with chemical 5 liters per 1 Sqm 

Treating the soil beneath the building and around the foundation with a soil insecticide is a preventive measure. The purpose of the treatment is to create a continuous chemical barrier between the ground from where termites come and woodwork or other cellulosic materials in the building.

7. REQUIREMENTS FOR BARRIER

All foundations shall be fully surrounded by and in close contact with the barrier or treated soil. Each part of the area treated shall receive the prescribed dosage of chemicals.

8. TIME OF APPLICATION OR WHEN TO SPRAY ANTI TERMITE PROCEDURE ON SOIL

Soil Treatment should start when foundation trenches and pits are ready to take mass concrete in foundations. Laying of mass concrete should start when the chemical emulsion has been absorbed by the soil and the surface is quite dry. Treatment should not be carried out when it is raining or when the soil is wet with rain or sub-soil water. The foregoing requirements apply also in the case of treatment to the filled earth surface within the plinth area before laying the subgrade for the floor.

Once formed, treated soil barriers shall not be disturbed. If by chance, treated soil barriers are disturbed, immediate steps shall be taken to restore the continuity and completeness of the barrier system.

Anti Termite procedure 

9. HOW TO TREAT SOIL FOR ANTI-TERMITE 

Anti Termite Treatment for RCC & Masonry Foundations and Basement ( Load Bearing Structure) 

 Anti Termite 

A. Treatment for RCC Foundation (Buildings without Basements)

Note- 

i:- In the case of reinforced cement concrete (RCC) foundations, the treatment shall be at a depth of 500mm below the ground level except when such ground level is raised or lowered by filling or cutting after the foundations have been cast.

ii:- In such cases, the depth of 500mm shall be determined from the new soil level resulting from the filling or cutting mentioned above, and soil in immediate contact with the vertical surface of RCC

iii:- Foundations shall be treated at the rate of 7.5 L/Sqm

B. Treatment to Trenches Made for Foundation of Masonry Walls or Basement 

The bottom surface and the sides up to a height of about 300mm of the excavation made from masonry foundations and basement shall be treated with the chemical ( mixed with water ) at the rate of  5 liters per Sqm surface area.

C. Anti Termite Treatment to Vertical Backfilled Soil Along Masonry Foundation/Retaining wall

i:- After the masonry foundations and the retaining wall of the basements come up, the backfill in immediate contact with foundation structure shall be treated at the rate of 7.5 liters/ Sqm of the vertical surface of the substructure for each side.

ii:- If water is used for ramming the earth fill, the chemical treatment shall be carried out after the ramming operation is done by rodding the earth at 150mm centers close to parallel to the wall surface and spraying the chemical at the above dosage. 

iii:- After the treatment, the soil should be tamped in place. The chemical shall be directed towards the masonry surfaces so that the earth in contact with these surfaces is well treated with the chemical.

D. Treatment of Top Surface of Plinth Filling 

i:-  The top surface of the consolidated earth within plinth walls shall be treated with the chemical at the rate of 5 Liter / Sqm of the surface before the sand bed or subgrade is laid. 
ii:- This treatment shall also be carried out on the Damp proof course provided on the plinth wall. 
iii:- If the filled earth has been well rammed and the surface does not allow the emulsion to seep through, holes up to 50mm to 75mm deep at 150mm centers both ways may be made with 12mm diameter mild steel rod on the surface to facilitate saturation of the soil with the chemical.

E. Anti Termite at Junction of Wall and Floor

i:-  Special care shall be taken to establish continuity of the vertical chemical barrier on the inner wall surface from ground level up to the level of the filled earth surface.
ii:- To achieve this, a small channel 30mm X 30mm shall be made at all the junction of wall and columns with the floor (before laying the subgrade) the rod holes made in the channel up to the ground level 150mm apart and the iron rod moved backward and forward to break up the earth and chemical poured along the wall at the rate of 7.5 liters/Sqm of the vertical wall or column surface so as to soak the soil right to the bottom.
iii. The Soil should be tamped back into place after the operation.

F. Treatment of Soil Along External Perimeter of Building 

i:- After the building is complete, the earth along the external perimeter of the building should be rodded at intervals of 150mm and to a depth of 300mm.
ii:- The rods should be moved backward and forward parallel to the wall to break up the earth and chemical poured along the wall at the rate of 7.5 L/Sqm of the vertical surface.

G. Anti Termite Treatment to RCC Basement Buildings 

The treatment starts after the excavation for the basement is complete and before laying soiling and plain cement concrete (PCC).
The treatment shall be carried out in the following stages before laying the rubble soling and PCC, the compacted and leveled soil shall be treated at 5 L/Sqm.

Note: - In the case of soils/sand filled above the raft, the treatment at 5 L/Sqm shall be carried out on the top surface of filled soil/sand. In such a case, treatment to soil/sand below raft may not be necessary.

10 RISK ASSESSMENT WHILE PROCEEDING FOR ANTI-TERMITE TREATMENT  

A. Moderately Irritant to Skin:- Remove all contaminated clothes and shoes and wash up immediately with soap and plenty of water 15 to 20 mins.

B. Moderately Irritant to Eyes:- Immediately flush eyes with water for at least 15 Mins and consult ophthalmologists. 

C. Unlikely to present any acute hazard in inhalation in normal use remove from exposure area to fresh air immediately if breathing has stopped perform artificial respiration keep person and at rest.

11. METHOD STATEMENT FOR ANTI TERMITE TREATMENT 

1)Before chemical application, all extraneous sources of cellulose and other edible materials such as debris, tree stumps, root strikes, construction soil and wast wood shall be removed from the treated areas.

2) the method statement (MS), Material safety data sheet (MSDS) must be hand with the QA/QC Engineer before the commencement of the work.

3) All foreign matters and impermeable soil material which decreases the treatment effectiveness shall be removed from the treated area.

4)Formation shall be compacted prior to the application of A.T.T.

5) Manufacturers' instruction/procedures including dilution and application shall be strictly followed by drilling application.

6)Treated areas shall be kept undisturbed as per manufacturer recommendation in order to allow chemicals to bind strongly with soil.

7) Imidacloprid 30.5% SC shall be diluted to bind water by volume of 2.1ML (Chemical)/L of water.

8)Using watering diluted/ Imidacloprid 30.5% SC shall be spread/applied at the treated area at the rate of 5liter/ sqm.    

12. SPECIAL PRECAUTION AND CHECKLIST FOR ANTI TERMITE TREATMENT 

1. All employees shall be provided with complete personal protective equipment PPE.

2. All employees shall attend safety indications and training courses to identify all hazards associated with this work.

3. All workers shall be provided proper tools with equipment’s to execute the work safely

4. MSDS (Material Safety Data Sheet) shall be displayed at the work location.

5. Do not eat, drink, or smoke when handling (Anti Termite Treatment material) wash hands before eating, drinking, or smoking.

6.  Manufacturers' instruction/procedures including dilution and application shall be strictly followed during application. 

7. It should be stored in touched, well-ventilated storerooms, away from unauthorized personal food and animal feed.

8. Workers should wear a suitable mask, rubber or plastic gloves, goggles, apron footwear, etc.

9. Empty bottles of Anti Termite Treatment shall be disposed of out of site through register vendor for Hazardous disposal.

13. OTHER ACTIVITIES FOR QUALITY PURPOSE RECORD

1. Submit IMIR ( Incoming Material Inspection Report)

2. Check at the site that diluted material is in proper proportion as per IS or Project Specification

Download Risk Assessment File for Anti Termite in MS Excel, Word

Method Statement for Anti Termite Treatment in PDF

MSDS for Anti Termite Treatment IN pdf

DOWNLOAD INDIA SPECIFICATION 

1. IS: 6313 PART 1 CONSTRUCTIONAL MEASURES

2. IS: 6313 PART 2 PRE CONSTRUCTIONAL CHEMICAL TREATMENT MEASURES

3. IS: 6313 PART 3 ANTI-TERMITE TREATMENT FOR EXISTING BUILDING