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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION REVISED MONITORING AND REPORTING PROGRAM NO. 93-701 FOR GEWEKE LAND DEVELOPMENT AND MARKETING 16 SOUTH CHEROKEE LANE, LODI SAN JOAQUIN COUNTY GROUND WATER AND GAS/VAPOR SAMPLING The ground water monitoring network, shown in Figure 1, consists of 14 monitoring wells, MWl through MW14, and an extraction well, EWl. The soil gas/vapor monitoring network consists of the ground water monitoring network listed above and seven vapor wells, VW1 through VW7, as shown in Figure 1. The soil and ground water insitu bioremediation system includes monitoring wells MWI, MW3, MW4, MW5, MW8, MW9, MW11, MW14, and EW1 and vapor wells VW1 and VW3 through VW7, which were inoculated with bacterial consortia on 16 August 1994. New wells and monitoring points shall be included in the monitoring program. Where applicable, cone penetrometer technology may be used for collection of soil, vapor, and ground water samples. The Board shall be notified five days in advance of drilling. After several rounds of monitoring results have been reviewed, the sampling schedule may be modified, at the discretion of the Board. Table 1: Ground Water Monitoring for Petroleum Hydrocarbons The ground water monitoring program for petroleum hydrocarbons shall consist of the following: Type of Sampling Sample Analytical Parameters Units Sample Frequency Locations Method Depth to ground water Feet ---- Quarterly All Wells ---- Purgeable Aromatic Organics gg/l Grab Quarterly All Wells EPA Method 8020* Purgeable Halogenated Organics gg/l Grab Quarterly All Wells, Except EPA Method 8010* MW6, MW10, MW11 Ethylenedibromide µg/1 Grab Quarterly MW14 EPA Method 8010 TPH as gasoline gg/l Grab Quarterly All Wells LUFr Method GCFID ' All constituents and peaks in ground water samples are to be reported.