Along external wall where the apron is not provided using chemical emulsion @ 7.5 litres / sqm of the vertical surface of the substructure to a depth of 300mm including excavation channel along the wall & rodding etc. complete:
2.35.1.1With Chlorpyriphos/ Lindane E.C. 20% with 1% concentration
Matches DSR 2023Vol 1, page 138