ARCHIVED REPORTS XR0001834 - Laserfiche WebLink

Home Browse Search

r� 2.0 GROUNDWATER MONITORING AND SAMPLING 2 II _Groundwater Monitoring Groundwater monitoring wells for the 521 North Cherokee Lane (former Parmar Texaco site) were monitored on April 1, 2003 The locations of the monitoring well are depicted on both Figures 3 and 4 All well monitoring and sampling was conducted in accordance with the monitoring procedures outlined in the attached Appendix 1 and by verbal directives issued by PHSEHD The wells were initially inspected for integrity and general maintenance condition with the findings reported on the Monitoring Well Data Sheets presented in Appendix 2 The wells were then probed for depth to the groundwater surface and depth to bottom of each well Initially, the depth to water surface was measured by an electronic water level indicator that allowed measurement of depth to approximately 0 01 foot These water surface depths for each well were then recorded on the individual monitoring well data sheets contained in Appendix 2 After depth to water was determined, a clear, acrylic bailer was used to visually inspect an undisturbed sample from the top of the water column to determine if a product layer or sheen was present A pronounced sheen and product layer was visible on the tape and the bailers used to sample each well All monitoring wells had a free-product layer at least 0 01 foot thick The water level indicator was then used with a weight to measure the total depth of each monitoring well in order to determine the volume of water each well casing volume was These measurements and the calculated well casing volume for each well was recorded in Appendix 2 The monitoring wells were then sampled for a non-purge water sample from each well Water samples 1A, 2A, and 3A all represent non purge samples Each of the wells was then purged with a low-purge rate submersible electric water pump or hand bailed using a disposable bailer Groundwater electrical conductivity, pH, and temperature were all recorded as each casing volume of water was removed from the wellbore Data was recorded on the Monitoring Well Data Sheets Groundwater monitoring results are tabulated in Tables 1 and 2 Once the groundwater parameters were stabilized a water sample was collected Groundwater samples were collected using a disposable teflon bailer and placed into 40 ml VOA bottles and labeled in accordance with procedures outlined in the attached Appendix 1 Water samples from each of the monitoring wells were identified as 1B, 213, and 3B These samples represented purged groundwater samples where at least 3 casing volumes of water had been removed from each well The water samples were handled and transported under accepted chain of custody procedures outlined in the workplan to Kiff Analytical Laboratories, Davis, - California After sampling activities were concluded each of the wells were then secured All sampling equipment was decontaminated by Alqumox and followup distilled water rinse Rinse water from decontamination of sampling equipment was placed in a 55 gallon drums and labeled as nonhazardous waste Mam\D\EnvironmentaNParmarTexaco\Reports\041403QMR wpd 3