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Mr. Gordon Lee Boggs July 15, 1985 Page Two A diagram showing the placement of the wells and the accompanying drilling logs will be forwarded to you as soon as possible. Remedial actions cannot be decided at this time for Douglas because the apparent source of product is generally northwest of the Douglas property. However, Douglas will complete the following actions to further judge the source of the product in MW-8. First, the distribution and vapor recovery pipelines will be tested again according to NFPA Code 329. Secondly, the tank connections .for the vapor recovery system will be inspected at each storage tank for leakage. If any leaks should be discovered, the necessary corrections will be made immediately and the results of these procedures will be forwarded to you when they are avail- able. ECONO - STOCKTON, CA A summary of the information gathered by I T. Corporation is as follows. Three groundwater monitoring wells (MW-5, MW-6, nd MW-7) have been installed and have detected no visible product.. However, the laboratory analysis indicates that there are soluable hydrocarbons in the water. As figure 2. 1 illustrates, the monitoring wells surround the possible sources of a leak from the Fast Gas station, i. e: (1) Underground storage t nks (2) Distribution and vapor recovery pipelines (3) Submersible pump unit (4) Dispenser island (5) Storage tank fill pipes Therefore, any plume which may be represented is defined on the Fast Gas property. ( The slight groundwater gradient changes di ection`distinctly from 14W--6 toward MW-5 to MW-7 toward M4-5 according to Table 3. 1. Based on the information gathered to date, Douglas proposes several steps of remedial action. First, the distribution and vapor recovery pipelines will be IJ tested again according to NFPA Code 329, Secondly, the tank connections for the vapor recovery system will be inspected at each storage. tank for leakage. If any leaks should be discovered the necessary corrections will be made immediately I r and the results of these procedures forwar ed to you upon completion. Thirdly, the groundwater will be monitored for liquid product every two weeks and the results recorded in a log for three months. If no liquid product has accumulated in three months, then semi-annual inspecti ns will be made of each groundwater monitoring well. If liquid product should accumulate in any of the monitoring wells or the soluable hydrocarbons need to be removed, then a groundwater depression and treatment system shall be installed. Clean-up levels will be based on economics and the applicable technologies to protect the resources of concern.