WORK PLANS - Laserfiche WebLink

Home Browse Search

f1 Santa Fe Pacific Pipeline Partners, L.P. J-6075.03 L� January 6, 1994 STOCKTON WORK PLAN Page 6 The new monitoring well will be surveyed to establish vertical control relative to a known vertical datum. The well casing elevation and the ground surface elevation will be obtained. The surveying will be performed by a California State Certified Land Surveyor under subcontract to Hart Crowser. The newly installed monitoring well will be sampled on a quarterly basis by an outside consultant subcontracted to SFPP. Task 3 - Preparation of Technical Memorandum Following the completion of Tasks 1 and 2, a technical memorandum presenting the findings of these tasks will be prepared. The memorandum will include descriptions and methodologies of work performed and summaries of soil analytical results. A final version of the memorandum will be prepared incorporating SFPP comments and will then be submitted to the RWQCB for review. Task 4 -Field Treatability Study Prior to the preparation of the RAP (Task 5), Hart Crowser will conduct a field treatability study to evaluate the feasibility of in situ bio-remediation. Based on the data previously acquired regarding the site soil type and conditions, the soil vapor extraction in combination with in situ bioremediation (bioventing) appears to be an appropriate soil remedial technology for this site. Hart Crowser proposes to conduct an in situ respirometry test to empirically determine the activity of the microbial community. Respirometry provides a direct field assessment of the potential for bioventing as a remediation technology. The in situ respiration test consists of ventilating the soil in the vadose zone with air and subsequently, monitoring the depletion of oxygen and the production of carbon dioxide over time after the ventilation has ceased. Air is injected at a predetermined rate for 24 hours to provide oxygen to the soil. After the air is turned off, oxygen, carbon dioxide and volatile petroleum hydrocarbons are measured periodically from soil gas monitoring points. The respiration test generally takes four to five days. We are assuming that the respirometry test will be conducted at well M-1 with temporary monitoring probes installed around it.