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Groundwater Sampling and Analysis Plan <br /> Sprayfield Groundwater Monitoring <br /> • Each sample will be logged on a chain-of-custody record that will also indicate the sample <br /> ID, date and time of collection and the sampler signature. <br /> • After the completion of sample collection, a laboratory provided custody seal will be placed <br /> on each sample container. <br /> • Containers will be placed into zip locked baggies to maintain a dry environment. <br /> • Sample containers will be placed into appropriately sized coolers equipped with foam inserts <br /> to prevent container breakage. The coolers will be equipped with blue ice or bagged ice to <br /> maintain a cooler temperature of 4 degrees Centigrade. The cooler will be maintained to <br /> prevent the accumulation of water and the entry of water into sample bags. Coolers will be <br /> hand-delivered to the laboratory for analysis. <br /> • Purge water will be discharged to land onsite. <br /> Analysis Methods <br /> The following is a summary of the analysis methods required for the South Lathrop Specific Plan <br /> sampling: <br /> Sampling Parameter Method of Sampling Container Holding Times <br /> Analysis Type Preservative <br /> Ammonia EPA 350.2 500 mL plastic Sulfuric Acid 28 days <br /> Bicarbonate alkalinity, EPA 310.1/ 250 mL plastic Unpreserved 14 days <br /> Hydroxide alkalinity, SM2320B <br /> Total alkalinity <br /> Chloride, Nitrate, Nitrite, EPA 300.0 250 mL plastic Unpreserved 48 hours <br /> Phosphate, Sulfate, <br /> Bromide, Fluoride <br /> Methylene blue activated EPA 413.1 250 mL plastic Unpreserved 48 hours <br /> substances <br /> Sulfite EPA 351.3 250 mL plastic Unpreserved 24 hours <br /> Total dissolved solids EPA 160.1 250 mL plastic Unpreserved 7 days <br /> Total Kjeldahl nitrogen EPA 351.2 500 mL plastic Sulfuric Acid 28 days <br /> Total coliform organisms EPA 9221 250 mL plastic Unpreserved 6 hours <br /> Fecal coliform organisms EPA 9221 250 mL plastic Unpreserved 6 hours <br /> Trihalomethanes EPA (3)40 mL glass Hydrochloric 14 days <br /> 8260B Acid <br /> Aluminum, Barium, Boron, EPA 250 mL plastic Nitric Acid 6 months <br /> Calcium, Iron,Chromium, 6010B <br /> Copper,Lead, Manganese, <br /> Magnesium,Potassium, <br /> Sodium, and Zinc <br /> H, EC, temperature Parameters collected from field meter <br />