In person Thai translator (plastic recycling) on 25th Feb.

I am looking for a translator to join me on a one-day trip around Bangkok. Travel and food will be covered by me on top of the compensation for this project. The main purpose of this trip is to look for informal waste collectors (people who collect/buy and sell waste plastics), junk shops, and aggregators for interviews. Therefore, the requirements are:
- Can translate Thai to English
- Knows how to find informal sector workers and possesses a basic understanding of how the waste moves in the city/country
- Is free for the entire day (25th, Saturday)