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i <br /> Messrs Trommer and Larson 16 June 2008 <br /> Preliminary Five-Year Review Letters Page 4 of 7 <br /> Various Sites <br /> 1140 Hammer Lane, W. <br /> • The CUF has recommended review of the work plan to replace well MW-5 and <br /> evaluate additional remediation requirements; the EHD agrees with the <br /> recommendation, has reviewed the work plan and issued a permit for destruction <br /> I <br /> of the current MW-5. The well will be reinstalled approximately 30 feet south of its <br /> current position. <br /> 103 E Street, N. <br /> • This site has been previously commented on. by the EHD and the EHD agrees <br /> with the recommendation of the revised letter. <br /> 2537 Waterloo Road, E. <br /> • The CUF has recommended that the RP be directed to assess remedial <br /> technologies and implement active remediation without delay. The EHD has <br /> recently issued an approval for an interim corrective action plan and a work plan <br /> that incorporates a pump and treat system coupled with SVE/IAS; three <br /> additional monitoring wells are to be installed toward the west for additional <br /> 1 plume delineation and two extraction wells are to be installed for remediation <br /> purposes. <br /> 290 Main Street N. <br /> • CUF recommends. implementing the approved remedial technology; the EHD <br /> agrees. The. discharge, permit for treated water has. been obtained, but the <br /> building permit has not been issued by the City.of Manteca; it.is estimated that an <br /> additional four weeks or so will be needed before.construction is initiated. <br /> 545 Miner Street E. <br /> • CUF recommends closure consideration,. the. EHD cannot agree at this time. <br /> Recent vapor samples have exceeded the Tier. 1. Surfer ESLs and soil data for <br /> TPHg, TPHd, naphthalene, benzene and xylenes exceed gross contamination; <br /> further evaluation of the. data. is needed.. The EHD will. direct the. RP to <br /> demonstrate a relationship between the noted contamination and the UST <br /> system release and to evaluate potential remediation requirements. <br /> 595 11'h Street E. <br /> • The CUF recommended closure consideration, the EHD agrees with this <br /> recommendation.. The vapor intrusion evaluation has been performed and <br /> reported to not be a significant concern, a closure summary report has been <br /> submitted and.is-pending EHD review. <br /> P 9 <br /> 1001 Yosemite Avenue E. <br /> • The CUF recommends site closure consideration, the EHD agrees with the <br /> recommendation. A soil vapor investigation has been conducted, but not yet <br /> reported; a site closure summary report has been submitted, but is pending EHD <br /> review. j <br /> 5-Year Review Comment Letter.061608.doc <br /> I <br />