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C A M B R I A <br /> Monitoring Well installation: The monitoring wells will be constructed of two-inch diameter <br /> threaded Schedule 40 PVC well casing. Approximately 15 feet of screen will be placed in the <br /> wells, with the screen placed at least 10 feet below and five feet above the top of the <br /> groundwater table. The sandpack will be placed along the length of the well screen up to two <br /> feet above the top of the well screen followed by a one-foot thick bentonite seal. A cement- <br /> grout seal will be placed above the bentonite seal to grade. The well will be secured with a <br /> locking cap under a traffic-rated well box. A well completion report will be prepared for each <br /> groundwater monitoring well. Wellhead elevations and locations of the newly installed wells, <br /> © as well as the existing wells, will be surveyed by a State of California licensed surveyor. <br /> Groundwater Sampling: Groundwater samples will be collected from the soil borings with <br /> CPT groundwater sampling equipment. We propose collecting groundwater samples at <br /> 10-foot intervals beneath first encountered groundwater. This sampling strategy may be <br /> altered in the field depending on the lithology encountered during drilling. <br /> Groundwater samples will also be collected from the newly installed wells after they have been <br /> • properly developed. Blaine Tech Services of San Jose, California will develop and sample the <br /> wells after the wells have been installed. <br /> Groundwater samples will be contained in approved sample containers, labeled, entered onto a <br /> chain-of-custody record and placed into a cooler with ice for transport to a State of <br /> California certified laboratory for analysis. <br /> Chemical Analyses: Groundwater samples and selected soil samples will be analyzed for total <br /> petroleum hydrocarbon as gasoline (TPHg) by EPA Method 8015 (modified), benzene, <br /> toluene, ethylbenzene, xylenes, (BTEX) and MTBE by EPA Method 8020. Groundwater <br /> samples will also be analyzed for fuel oxygenates (TAME, ETBE, TBA, DIPE, and MTBE) <br /> by EPA Method 8260. <br /> Report Preparation: Following the receipt of analytical results from the laboratory, Cambria <br /> will prepare a written report which will include field procedures, laboratory results, boring <br /> logs, conclusions, and recommendations for additional work as warranted by the results of the <br /> investigation. <br /> The scope of work described in this work plan will be performed under the supervision of a <br /> • registered geologist or registered professional engineer. <br /> 0854 5 <br />