The increase in short interest for Clean Harbors suggests that investors are becoming more bearish on the stock. However, since the short interest is still below the peer average, it indicates that the sentiment is not overwhelmingly negative. The short interest level also suggests that there is not a significant risk of a short squeeze in the near term, as it would take less than two days to cover all short positions. Therefore, the impact on the stock price in the short term is likely to be neutral, as the market absorbs this information and balances it against other factors.