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COLORADO DEPARTMENT OF PUBLIC HEALTH AND ENVIRONMENT <br />WATER QUALITY CONTROL DIVISION <br />WATER QUALITY PROTECTION SECTION <br />GROUND-WA-ER P°RMI T GUID-ONCE <br />SUGGESTED MONITORING WELL SAMPLING PROTOCOL <br />B. GR(ZiT1tTB-WA2'ER SALE C'JLLE.^TION <br />4. METHOD C FOR SAMPLE COLLECTION <br />i his method describes procedures to be performed when the monitoring we11(s) aze very low yielains. A <br />"very law yielding' well is one whose time of recharge for sampling is greater than three hours and less than <br />24 hours. This samolin~ procedure is applicable for both ptunos and bailers and includes the following: <br />a. Prior to pursing sampling, calibrate all test equipment used in the fieid accoraing to manufacture's <br />specifications. Enter all equipment ca'tibration data into a field logbook. Clean all field test equipment <br />and ground-water sampling equipment. <br />b. Pump/bail the water into sample containers. From one of the sample containers determine the <br />temperanire, pH and conductivity. As the well has recharges, collect samples in the order indicated in the <br />permit m the para~rzph for the compliance schedule addresstng the sampling protocoi {typically, Part <br />LA.6. (d)(F)}. <br />5. SAMPLE COLLECTION BOTTLES. HOL-iNG TLMES AND OUANTiT:' OF S~IVIPLE <br />The Wate: Quality Control Divisicn has recommended procedures for satnpii,.g and delivery to a certified <br />laboratory. Table 1, below, lists the proper sampling procedures, sample volumes, type of sample container, <br />preservation and holdins time foe a valid samote. This table is summary of Divisor. suidance found ;n Lhe <br />"References" in the pe.~rtit Rationale. <br /> FIELD CONTAINER VCL. REQ. PRESERVATION HOLDING <br /> FILTERED MILLILITERS TIME '. <br /> (bIINIMUNI) <br />TOTAL POLYPROPYLENE, ~~ <br />COLIFORM NO GLASS 200 COOL TO 4° C 6 HOliRS ~~~ <br /> STERILIZED I <br />CHLORIDE Y"ES PLASTIC. <br /> GLASS ~ ~0 NONE RE UIRED 23 DAYS <br />StiLFATE ~ YES PLASTIC, <br /> GLASS 100 COOL TO 4° C I 23 DAYS <br />NITRATE - YES P'_ASTIC, <br />NITRITE GLASS 200 COOL TO 4° C 24 HOURS <br /> ADD H~SO< off Q <br /> I I I <br />