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GROUND WATER MONITORING AND REPORTI ROGRAM <br /> FOR <br /> DALLAS CORPORATION, DBA OVERHEAD/LO OOR COMPANY <br /> SAN JOAQUIN CO. <br /> Monitoring of wells at the Overhead/Lo oor sit 11 adhere <br /> to the following specifications. Monit ing of grou ter <br /> surface elevations and water quality shall be performe m thl . <br /> After a full year of monthly monito i g results have been <br /> submitted and interpreted, a :hang n the monitoring schedule <br /> and requirements may be considers Monitoring shall include <br /> wells MW-1, MW-2, MW-3, MW-4 an y wells added in the future. <br /> Specific details of monitoring reporting are outlined below. <br /> Monitoring requirements <br /> 1. Water Level Measurements - the ing measurements shall be <br /> made for each well. <br /> a. Depth to water under static itions - measured to <br /> the nearest 0. 01 ft. <br /> b. Reference point elevation - meas a to 0. 01 ft. <br /> c. Water surf ce vation - calculate from the above <br /> measurements <br /> d. Depth to wa a after i - measured to 0. 01 ft. <br /> e. Ground surfa elevatio - s red to 0. 1 ft. <br /> f. Date- and time each urement <br /> 2 . Purging - the following m a ements or calculations shall be <br /> made for a well <br /> a• ing rate <br /> b. al v 1 me of wat urged <br /> C. sing v ume <br /> umber casing volum s purged <br /> . pH, E1 ri nductivity (EC) and temperature <br /> asurem s to gular intervals throughout the <br /> 'ng ocess (at the beginning of purging and after <br /> ea sing volume) . <br /> shall e urged a minimum of three casing volumes and <br /> pH a d emperature have stabilized. <br /> • Water sa s shal be analyzed for total dissolved solids <br /> (TDS) , EC, p , total hardness and total alkalinity as measured <br /> in the labo a cry. <br /> • inerals - o centrations of the following constituents shall <br /> determi e . <br /> Ca i ns - Calcium (Ca2+) , Magnesium (Mg2+) , Sodium <br /> a ) , Potassium (K+) <br /> b. ons - Carbonate <br /> (C <br /> ons Bicarbonate (HCO3-) , <br /> 2-) , Nitrate (NO3-) <br /> C loride (Cl-) , Sulfate (SO4 <br /> c. Silica (Si02) <br />