SITE INFORMATION AND CORRESPONDENCE_FILE 2

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`✓ James Giottonini Page 2 obtain funding approval from the City Council. The specifications, once approved by PHS/EHD, would then be used to prepare a bid package which is anticipated to take approximately 30 days. The COS indicated that it is then generally another 6 - 10 weeks before a contract is awarded. Regardless, the COS stated that the work plan is scheduled to be implemented next spring, sometime in April or May of 1995. 110 West Sonora RESNA indicated that the Sacramento office is no longer handling sites and that this site has been transferred to the Escalon office. The draft corrective action plan had not yet been submitted to PHS/EHD. RESNA reviewed the information which was received from the Sacramento office and identified errors with regards to the methodology which was used to estimate flow rates. RESNA explained that an abbreviated vapor extraction test would be performed within two weeks in order to obtain adequate information to design the proposed vapor extraction system. RESNA stated that the draft plan would be submitted for PHS/EHD evaluation within 30 days after the completion of the field work. Once final approval by PHS/EHD is obtained, the plan would then go out to bid either for preparation of the plans and specifications or for implementation of the corrective action plan. 1740 Houston Avenue The installation of an additional monitoring well was discussed. Based on the initial depth to water measurements the site doesn't have a monitoring well down-gradient of the contaminated area. The last sampling event occurred on June 22, 1994 and the next quarterly sampling event should be scheduled by September 22, 1994. Prior to selecting a final location for the proposed monitoring well, PHS/EHD suggested monthly depth to water measurements be collected for one quarter to verify groundwater flow conditions. 1211 Swain Road The COS indicated that a workplan to over-excavate the dispenser/piping area had been submitted to PHS/EHD and that the work was thought to have been already completed. The review of the underground tank file indicated that correspondence was sent from PHS/EHD to the COS in June 1994 stating that a work plan prepared by a registered professional should be submitted for the over- excavation. The letter also clarified that in order to obtain oversight for an over-excavation at the time of a tank removal, a workplan for the limited excavation must be submitted with the tank removal plan. The file indicated that no additional or revised workplans had been submitted and that no additional inspections took place. COS staff will determine the status of the site and will update PHS/EHD. An acceptable workplan needs to be submitted to PHS/EHD to initiate work at this site. Argonne and Picardy Residual soil contamination is evidenced despite the over-excavation attempt. PHS/EHD correspondence indicated that a work plan should be submitted to further define the extent of soil contamination and verify that groundwater was not impacted. PHS/EHD recommended the City put out to bid workplans already approved by this office. This would confirm an acceptable scope of work and will bring in more comparable bids. In addition, obtaining bids on a cost per unit basis for easier comparison was discussed. All additional investigative or remedial work for this site must be conducted under the supervision of a registered professional. The COS agreed to submit within 30 days a work plan for the continued investigation for PHS/EHD evaluation and approval.