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Central Valley Regional Water Quality Control Board 6375.4.002.01 <br /> Yosemite Avenue Properties December 6, 2004 <br /> WORK PLAN FOR GROUNDWATER STUDIES Page 4 <br /> • The general minerals suite include filtered analysis of ammonia as N, bicarbonate alkalinity, <br /> bromide, carbonate alkalinity, chlorine, fluoride, hardness, methylene blue activated substances <br /> (MBAS), nitrates + nitrite as N, pH, phosphate, sulfate, sulfite, total alkalinity, total dissolved <br /> solids (TDS), total Kjedahl nitrogen (TKN), total nitrogen , total/fecal Coli form organisms, and <br /> trihalomethanes including chloroform, bromodichloromethane, dibromochloromethane, and <br /> bromoform. <br /> • The metals suite includes filtered and unfiltered metals analyses of aluminum, barium, boron, <br /> calcium,iron, chromium,copper,lead, manganese,potassium, sodium, and zinc. <br /> Reports <br /> We will prepare an installation summary report and quarterly groundwater sampling reports that <br /> include water quality sampling results presented in data tables, a well location map, and a sketch <br /> map describing water level data for each quarter. Quarterly reports will include quarterly and <br /> cumulative data of all sampling parameters and interpretation of analytical data. Discussion and <br /> analysis will be focus on baseline data compared to potential effects of the wastewater <br /> sprayfield. Each of the quarterly reports will include a groundwater plot for each well's data and <br /> figures to illustrate the groundwater flow direction and gradient calculated using selected water <br /> level data. <br /> SCHEDULE <br /> We plan to complete the monitoring well installation within approximately 4 weeks of receiving <br /> formal approval of this work plan. Reporting and continued monitoring efforts for the <br /> groundwater study are will be performed over the next year. <br /> If you have any questions on any portion of this work plan, please call and we will be glad to <br /> discuss them with you. <br /> Very truly yours, <br /> ENGE INCORPORATED Reviewed by: — <br /> Ay e Jensen, CEG Dennis B. Nakamoto <br /> cls/dbn/tw:workplan <br /> Attachments: Figure 1 –Site Plan <br /> Figure 2–Proposed Well Locations <br /> cc: 1 - Mr. John Scherer, TCN Properties,L.P. <br />