WORK PLANS - Laserfiche WebLink

Home Browse Search

V Kennedy/Jenks Consultants 4.5 Quality Control Guidance Follow the quality control requirements specified in the Quality Assurance Project Plan (QAPP), project-specific field sampling and analysis work plan, and/or project-specific regulatory requirements, as applicable. The following may be used as guidelines. Approximately one duplicate sample should be obtained for each sampling event or for each batch of samples (a batch is typically defined as 20 samples). Collect duplicate samples immediately after the original samples are collected. Purging is not performed between original sample collection and collection of duplicate samples. Original and duplicate samples are collected sequentially, without appreciable delay between collection cycles. Duplicate samples are to be submitted to the laboratory blind (i.e., not identified as a duplicate sample). 1. Typically, at least one type of field blank sample (rinsate or transfer) should be collected per day of water sampling. All field blank samples are to be collected, preserved, labeled, and treated like any other sample. Field blank samples are to be sent blind to the laboratory (i.e., not identified as a field blank). Record in the field notebook the collection of any blank sample (rinsate, transfer, trip). The types of field blank samples are discussed below. • Rinsate blank samples. If rinsate field blank samples are required, prepare the sample by pouring deionized water over, around, and through the various reusable sampling implements contacting a natural sample. Rinsate blanks need not be collected when dedicated sampling equipment is used for purging and sampling the well. Rinsate blank samples are to be analyzed for the same parameters as the environmental samples. • Transfer blank samples. Transfer blank samples are routinely prepared when no rinsate blank samples are collected. (The purpose of a transfer blank sample is to monitor for entrainment of contaminants into the sample from existing atmospheric conditions at the sampling location during the sample collection process.)A transfer blank sample is prepared by filling a sample container(s)with distilled or deionized water at a given sampling location. Transfer blank samples are to be analyzed for the same parameters as the environmental samples. 4.6 Investigation-Derived Waste (IDW) Management Purge water is to be contained onsite in an appropriate labeled container for disposition by the client unless other project-specific procedures are defined. If the groundwater is not contaminated, e.g water produced at a winery, it may be distributed on the ground near the well, in a manner that does not create a safety hazard. As a matter of practice, any waste, or potential waste, generated onsite, should remain onsite. Refer to the IDW SOG. Monitoring Well Replacement Work Plan, SOG 4 Sutter Home Lodi Winery, Lodi, California Page 6 of 7 g VsgwgletlmufyobNA5BB50J515 wp(erbamaN9npmisMwlnalaV wpleppb_sepl4gxrswnp mv_mm.Ea