Laserfiche WebLink
i <br /> San Joaquin County February 13, 1992 <br /> 02320 1466 Page 2 <br /> Sampling will be performed following well purging when temperature, pH, and conductivity <br /> measurements are stabilized unless an insufficient water column is present in the wells <br /> SAMPLE ANALYSES <br /> Laboratory analyses of samples collected from the selected wells will employ methods which will <br /> quantify the principal compounds of concern dissolved in groundwater, including benzene, toluene, <br /> ethylbenzene, and xylene (BTEX) and total petroleum hydrocarbons (TPH)-as-gasoline The results of <br /> these analyses have implications for the fate of other compounds present, such as lead and ethylene <br /> dibromide (EDB), and will be used as an indicator of the behavior of these other compounds <br /> The distribution of the gasoline hydrocarbons in selected wells will be monitored using EPA method <br /> 5030/802018015 on a quarterly basis (every three months) The lead concentrations in groundwater <br /> will be quantified in these selected wells on a yearly basis using EPA method 3005/7241 No analyses <br /> will be performed for EDB under this program unless the selected perimeter wells are found to contain <br /> gasoline hydrocarbons Analyses will be performed by a laboratory certified by the State of California <br /> Department of Health Services <br /> SCHEDULE <br /> The sampling schedule for this work has begun as of January 1, 1992 The quarterly sampling <br /> schedule will be conducted as shown on Table I (Attachment B) Quarterly reports will be submitted <br /> within 4 weeks of the date of groundwater monitoring and sampling The initial sampling date will be <br /> conducted on February 20, 1992 All sampling will be performed using new or decontaminated <br /> equipment, and containers provided by the certified laboratory (or equivalent) <br /> �I <br /> If the San Joaquin County Public Health Services, Environmental Health Services has any comments <br /> or questions about this program, please contact us prior to our next scheduled sampling event of <br /> February 20, 1992 <br /> Sincerely, <br /> Groundwater Technolo , Inc <br /> qDANIEL R TORMEY, Ph <br /> Senior Project Geologist <br /> ;C4OTT <br /> ject Civil Engineer <br /> E GABLE <br /> Environmental Geologist <br /> Project Manager <br /> DRTISEG rc <br /> • Attachments <br /> 1486WP1 LTR <br /> cc Noah Horowitz, Quaker Oats Company GROUNDWATER <br /> Mike Rabith, Golden Grain Company EF TECHNOLOGY,INC <br />