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COLORADO DEPARTMENT OF PUBLIC HEALTH AND ENVIRONMENT <br />WATER QUALITY CONTROL DIVISION <br />WATER QUALITY PROTECTION SECTION <br />GROUND-WATER PERMIT GUIDANCE <br />SUGGESTED MONITORING WELL S.4MPLiNG PROTOCOL <br />B. CzRQUIdI3-'CATER SAMPLE COLLE„^'FIGN <br />5. SAMPLE COLLECTION BOTTLES. BOLDING TIMES a ND OUA[\'TITY OF SrLr.'1PLE <br />(CONTINUEDI <br />The permittee is requested to maintain a logbook pr a log form ro record the sampling procedure. The <br />logbook/form should allow space [o log readings for the field oazameters of temperature, pH and <br />conductivity. In addition the field testing procedure should inciude [he time the sample was taken, the <br />volume of water pumped or the number of bails since the last sample plus the cumulative number of bads (or <br />volume). Allow space for a plrysical description of the sample, whether the sample was cleaz/turbid, what <br />color (if any) was noted in the sample(s). In addition to the above information, the logbook/fot-. is to ailow <br />space for the following information: <br />Location/ldentification of sample site (050A. 3001, etc); <br />Date and time of sample collection; <br />Name of sample;: <br />Size of bade: used or the Rpm ot` the Dump used for sampling; <br />Depth to stauc water level measured from the "measuring point"; <br />Total measured depth or the well: <br />Unusual characteristics of the sample or the purging process, such as sediment in the water, an <br />Odor was noted in the sample; <br />Time for the well to recover to allow for purging and/or sampling. <br />6. FIELD SA?~IPLE COLLECTION u`7D TESTLNG <br />Prior to obtaining a around-water sample r`or analysis, the growzd water is to be sampled for temperature; pr'. <br />and conductivityy This is typically done with probes and field tesnnQ eampment..4s a consequence of using <br />' dus equipment, the manufacturer's instructions for use and calibration must be followed. <br />pH Measurement <br />Tne sample is not required to be filtered. The pH in ground water is controlled by the cazbonate system <br />including gaseous and dissolved carbon dioxide, bicarbonate and carbonate ions. Other dissolved gases, such <br />as hydrogen sulfide and ammonia, can also affect the pH of the ground water. A high sodium cpncentration <br />will give an anomalous pH reading, which mus[ be corrected according to the recommendation of the <br />manufacturer of the pH electrode. This correction is usually necessary Drily of pH <br />