LPRV Aquifer Management: Water Quality Impacts

Of the land-use activities that have been identified to be of greatest concern, available information indicates that septic sewage and storm water and road runoff are already having identifiable impacts on the valley's ground water quality. A third area of concern is handling and storage of hazardous materials, including fuels.


This map shows the locations of identified leaking underground storage tanks (LUSTs) in the valley (pink dots). In the southern valley, a survey of all underground fuel storage tanks (USTs) is also shown (similar information for the northern valley is not available). Based on the rate of occurrence of LUSTs in the southern valley, fully 30% of UST sites have problems. Note that because steel tanks corrode with time, it is not a question of whether USTs will leak, but when and how badly. Although many of these LUST sites were commercial fuel stations and did not affect local ground water when they leaked, some were major releases from large storage facilities which have directly affected ground water (e.g. Union Pacific rail yard diesel tank releases).