Stalker: Call of Pripyat → Quests → Anomalous Plant
The quest is accepted from Professor Ozersky after you've invited Sokolov to accompany you to Pripyat.
You must go to the "anomalous grove" and collect a plant sample. The quest is complicated by the grove's numerous chemical anomalies, such as "soda" and "acid fog." However, the SEVA suit, which provides excellent protection against anomalies, including acid ones, and the Svarog detector, which can help locate the anomalies, will come in handy.
Artifacts that protect against chemical exposure ("Slice of Meat" and "Blood of Stone") will also prove useful. You can also take an antidote before entering the grove. After collecting the plant, you can immediately leave the grove. Zombies or mutants may pose a problem. The SSP-99M suit is yours for Sokolov.
Source: ru.stalker.wikia.com
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