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CalifornAegional Water Quality Cool Board <br /> Central Valley Region <br /> Karl E. Longley,ScD,P.E.,Chair (a <br /> Linda S.Adams Arnold <br /> Secretaryfar <br /> Sacramento Main Office Environmental 11020 Sun Center Drive 92O0,Rancho Cordova,California 9567QSchwarzenegger6114 _�I.� <br /> Phone 916 464-3291 •FAX 916 464-4645 L) ` 1 h Governor <br /> Protection1�, <br /> http://www.wale rboards.ca.gov/central vol I ey �, <br /> JUL 1 4 2008 <br /> 9 Jul 2008 ENVIRONNIEN i HEALTH <br /> July PERMIT/SERVICES <br /> Mr. Robert Gray <br /> Pacific Gas and Electric Company <br /> Environmental Services <br /> Site Remediation <br /> 3400 Crow Canyon Road M138 <br /> San Ramon, CA 94583 <br /> CONDITIONAL NO FURTHER ACTION DETERMINATION, PACIFIC GAS AND ELECTRIC <br /> COMPANY, MCMULLIN DEHYDRATOR STATION NATURAL GAS PROCESSING <br /> FACILITY, 66250 SOUTH AIRPORT WAY, MANTECA, SAN JOAQUIN COUNTY <br /> Central Valley Regional Water Quality Control Board (Regional Water Board) staff has <br /> reviewed the 6 January 2003 Remediation Completion Report and 10 August 2004 Request <br /> for No Further Action at the McMullin Dehydrator Station prepared by CH2M Hill on behalf of <br /> Pacific Gas and Electric Company (PG&E). The McMullin Dehydrator Station (Site) is located <br /> on Airport Way and Perrin Road, approximately two miles south of Manteca in San Joaquin <br /> County within Assessors Parcel Number (APN) 257-030-010. <br /> The attached Memo to Program Manager describes the rationale for considering a Conditional <br /> No Further Action Determination. In summary, remedial action at the site consisted of <br /> excavating soil that was contaminated with petroleum hydrocarbons. The maximum <br /> concentrations of gasoline and diesel remaining in soil are 20 mg/kg and 7.7 mg/kg, <br /> respectively. Diesel contamination in the groundwater is below detectable concentrations in all <br /> wells except PZ-3, which is fluctuating at or below the water quality objective of 100 ug/L. <br /> Regional Water Board staff concurs with PG&E that the remaining levels of gasoline and <br /> diesel in soil and groundwater do not pose a threat to human health, the environment, or <br /> waters of the State. <br /> PG&E has satisfactorily completed site investigation and remedial action, achieved applicable <br /> remedial action standards and objectives, and a permanent remedy has been accomplished at <br /> the McMullin Dehydrator Station. Therefore, no further action is required. Interested parties <br /> were given a 30-day comment period to respond to this proposed Conditional No Further <br /> Action Determination. No comments were received. This No Further Action Determination is <br /> not effective until after PG&E submits the necessary documentation of the destruction of the <br /> monitoring wells, in accordance with all applicable County and State requirements. Once proof <br /> of appropriate destruction has been received, Regional Water Board staff will send written <br /> confirmation of the effective date of this Determination. <br /> California Environmental Protection Agency <br /> 01 Recycled Paper <br />