=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-Jun-1991
San Mateo           823/034 RLR(1986) is 9.4m below BM Guano Is 1851
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 12-Jul-1993
San Mateo           823/034 RLR(1986) is 9.4m below BM Guano Is 1851
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 26-Jan-2012
This is an historic station. Last data value received is that for August
1988. Station has been labelled 'inactive'. Before the data ended the
Primary benchmark was changed to BM 1 9.576m relative to gauge datum.