MINUTE ITEM

This Calendar Item No. C7_ was aEJJroved as Minute Item No.--4.-- by the State Lands

Ammission by a vote of i[ "'\15 D at its , 5- 5 - __

meeting. CALENDAR ITEM

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GENERAL PERMIT - PUBLIC AGENCY USE .PRC 5955

APPLICANT: Sewerage Agency of Southern Marin 405 'Sycamore Avenue Mill Valley, Califorri1a 94941

AREA, TYPE LAND AND LOCATION: 1.148-acre _parcel of ,tide and submerged land in Raccopn Btra~t near Point Tiburon, Mf!rin County.

LAND USE: Construction and r:;ain,tenance of a sanitary sewer outfall:.

TERMS OF PROPOSED PERMIT: Ir:itial period: 49 years from June 1,

:L98r1.

CONSIDERATION: The public health anq; saf.ety,. ·with the State reserving the l;right _a.t v time to set a mor.etary rental· if th·e· .... :t5mmission finds such action to rbe in the State '·s best interest. ·

BASIS FOR CONSIDERATION: Pursuant to 2 Ca 1. Adm.. Code 2005.

PREREQUISITE TERMS, FEES AND EXPENSES.: Applicant is permi tte:e ·of upl~.nd.

Filing fee ar.-:! -~::r~o~;S·sing costs h~ve been irecei ved. ·

STATUTORY AND OTHER -R.6SERENCE-S: A. P.R.C.: 'biv. 6, Parts 1 & t~ Piv. 13

B. Cal., Adm. Code: ;titie 2, Div. ~1; T;Ltle 14~ Div. 6.

OTHER PERTINENT .~NFORMATION:

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· .... , The annual rental value of the site is estim~t~d to b~ $540.

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CALENDAR ITEM N~l .• ·C07 ( c;oNTD)

2. A final ,.EIR/EIS W~!S .prep.ared by the United States Envtronmerital Ptotecti6n Agency .ami Novato Sanitary Di-strict, pursuant 'i:o CEQA <~nd the S·tate EI'R. Guid-elines •.

3. This project 'is s:~tuated on State land identified as po·s:;;essing significant ~~ironmental values pursuant to P.R.C. {)~70 .. 1, and is cliissi'fted in a use category, Class .c.~ .\Vhict. .eiuthorizes Multiple U$e.

Staff has· coordinated this proj.e.c.t wi·th tho.s1e agenci•?S and organ:i-zations which nominated the site as containi.:ng significant erivirpnmental values. 'They have found this p~oject to be compa:til?le with the~r .nomination.

APPROVALS OBTAINED: a San Franc.tsco f•ay Copservation and Development ..,. Commission, Oakland ~~g_~onal Water Quai~~y

Control Board.

FURTHeR APPROVALS REQUIRED: United States Army :Cd:rps of t:ngi:neers,

EXHIBITS:

Regional Water Quai'it:J Control Boar4,, Towh of Tiburon, 4nd South;ern Paci<fic Railroad.

A. Land Des c:t:f-ptlon ~· 0B • I,.o<;ation 'Map •

c. Environm~mtal ImE1act Report Summary

IT IS RECOMMENDED THAT THE COt.iMISSIOTSI:

1. DETERMINE THAT AN EIR/.EIS HAS BEE:N. PREPARED AND CERTIFIED FOR THIS PROJECT 'BY THE UNlXED s1~ATES ENVfRONMENTAt PROTECTION AGENCY AND NQlJATO SANtTAR't D~STRICT.

2. CERTIFY THAT THE J:NFORMA'.rION CONTAINED IN THE ElR/EIS HAS BEEN REVIEWED AND CONSIDERED BY THE COMMISSION.

3. DETERMINE THAT TH~ PROJECT WILL ]WT HAVE A SIGNITLCANT EFFECT ON THE ENVIRONMENT.

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llCA1.ENDARPACE' ·,_ '0'1G, • 1 MINUTE PAGE ~ , 2.0 a-~ -----,~·,·.:: ___ ,,::.'" <··--··--

CALENDAR ITE_M ~O C Q 7 ( {~ONTD)

4. .FIND Tl:iA'f GRANTING OF ·~H~ PERMIT 1~ILJ,.. 1.fAVE NO SIGN:j:FICAN'f EFFECT UPON ENVI~ONMEN,TAL CHARACT!~RISTI:CS :fl)~NTJ,FI~D Pur .. SUANT TO SECTION 63 TO. ;1., OF TH:i:: 'P·.·R.:C •.

.) • AUTHORIZE ISSUANCE TO THE s;WERA9'E. AGE~CY OF SOUT!iERtr MARIN OF A 49~YEAR GENERAL PERMIT ~ PUBLIC AGENCY USE FROM JUNg 1, 198-1:; IN CONS:!:DER~T~!)N OF TH~ ·piJ)3LI:C. H¢A.I.TH AND SAFETY, WI.TR THE STATE RESERV.;LNG THE ·RIGHT AT' ANY' TIME TO !;ET A .MONETARY RENTAL IF '['HE COMMISS1.0N FINDS SUCH ACfION TO BE IN 'EHE .. 'STATE'S 1BEGT.IN1'E~EST FOR CONSTRUCTION :AND MAINTENANCE OF Al SANLTARY . SEWER OlITF ALL ON THE LAND DESCRIBED C~. EXH:EBIT "Au ATTACHED AND BY REFERENCE MADE A -PART HEREOF.

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EXHIB.H "A"

LAN~ .GES·~fU PTfOH ·k'· 22448

A 5trip of land SO feet wice in Racoon Straits, San fY'ancisco ~ay, Marin County, CaH·forn.i~ more particular-ly ·described. as follows: ·

BEGINNING at a ppirrt: witti Californ)a. Zone 3 coordi11irtcs N ~ 505 ,540 and«~ = 1 .~"37 ::-135.; thence tttE: fol lowing fi v~ courses and di stances.;

1. N 6:t~3o~ !.ll ?.5 ·feet 2. ~ 27°30'W 1,000 feet 3. S 6~~ 0 30' E SO feet 4. ·N 27(>30 1 E t~o.on feet 5. N 6~~030 1 W 25 feet to th~ point of begihn-in_g.

EXCEPTING,, TH£RF-FROM a,ny portion lying above tJw ordfoar.y high water 1 ilie of San ·FYanci.!:>co Ray.

END nF DESCRIPT!ON

REViSED FEBRU>\RY 2~ 1981' ·By TECHNICAL SERVICES !UNIT, ROY MINfHCK, SUPERVISOR.

CALENDAR PAGE

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EXHl~JT 11311

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EXHIBIT "C"

w 22448_

ENVIRONMENTAL IMPACT REPORT $UMMARY

I . INTRODUCTtON:

JI.

The folLowing is a summary of a 119-79 EI·R. tor the Eastern Marin and Southern Sonoma \fastewaiter Agencies, prepared by the United States Environmenta!l Protection Agency and Novato Sanitary District for :a proposed project consisting of upgrading all waste~11at::-2r treatment plants in the Eastern Marin~South Sonom~1 area. This summarv will be limited primarily to the -~ecommended project for Southern Marin, which includ·e1s_ the construction of a sanitary sewer outfatl that -will occupy State lands under Commission jurisdictilon •.

PROJECT DESCRIPTION:

The purpose of the prop.osed plan is to upgrade all tre~tment plants to a mi~tmum of secondary treatment in conformance wi!:h the Clean Wat~er Act. At the same time,, added capacity will be pro1.tided for all p'tant~ to accoynm0date the expected popu:ta·ti·on growth for the next ten years. This plan in!::ludes a combination of advanced treatment and fur their improvem2nts to outfalls and also meets am~onia toxicitj req~irements in the rece.iving waters. Th_e rec1:>mm~nded project for Southern Marin is .i 30-inch diaml~ter -force main extending approximately six mfles ~rom the· ~iil.1 Valley Treatment Plant to Raccoon Strait offshore of Tiburon. The new force main will carry trE~ated efifluent from the Mill Valley and Trestle Glen p1.ants, for d1.sposaT along with '?ffluent from the Siinitary !District No. 5 plant at Tiburon. A new outfaLl and di!ffuser will be constructed 300 feet offshore into Raccoon $'.trait to provide a minimum 30:0 initial dilution.

Ill. ENVIRONMENTAL SETTING:

The Southern Marin area includes the urbanized areas surrounding Richardson Bay and s:outh of the Corte Madera ridg2.

IV. ENVIRONMENTAL IMPACTS:

Most of the environmental impac~s of the recommended wastewacer plcn will be benefic~al. Removal of the e existing effluent discharges of the Mill Valley· and

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Tres·t1c Glen treatment pl.1nts wi~[ hc.lp alleviate many water qual:i-t.y problems in ·Rljchardson Bay includLng pathogens that can Be ~ t.hr-e~t ~q; public health and organic nµtrient:s that can fostet· Ufis·igiit:-~y alg~l blooms. But at the same t·ime, the, fre.shwat:er inpu~s to the Bay afforded by t:hc exist~:ng disthargcs ·wil~ be removed. There is no clear u~derstanding of how important these discharges may ·be· to the total ecosy.stem of upper Richarqson Bay, but in the least they are attractive to waterft.1wl that congregate over the outfalls at certai.n times of the year.

Construct.ion impacts may includ·e ·dust, destructi.on of veget.at·ion, traffic disrupti9n1, ~an9 publ:ic sc:1fety hazards. Wastewater discharges i~t:c:J the San Pablo Bay will l;>e eliminated. Inc.rea$ec;i tre,atmen~ levels , will reduce the impa~ts of rernain:illg di~charges during dry-weather and wet-weather peripds.·

Secondary environmental impacts o.f this plan may be caused by urban development served by the wastE}\·1ater treatment project. They include changes in land use and atten<lant increased runoff fr.pm. impervious surfaces am' ai:r pollution due to increased tr.affic. In the Marin/Sonoma County .proje.:;:t, the :issue of secondary impacts was seGond only to water quality concerns as a major determinant of the ~yp,~ and capaci~y of proposed treatment plants. It is .. debatable whether this growth is actually caused by: the avail'lbil:i.ty of sewage treatment facilities or ·is merely accommodated by it. I!: is possible that: develo:pmcnt w.ould t~ke place regardl.ess of this pr ect :although it would likely take a different forn .. 'SrnalI.1 privately r9n plants or septic tanks could ton~~ivably be use~ but the cost of adeq'.:late systems woul1~ be high. Scwag~­treatmcnt is one of severC1l infra'.~t.,..u9-ture systems which accommodate qrban d~~velqpmc:nt. Construction of a retaining wall Cit thr.:.! Tibl,!ro:n treatment plctnt could rep.uLt in ·erosion pJ:ohlems ~

MITIGATION MEASURES:

1. Include in construction speci!fications, requirements for dust control measures, m~qimizing disruption to existing vcgetatio1i and re:storation wh~_re practica;l> and protect.ion of work areas ;~gainst ptiblic safety hazards.

2. Conduct a survey of energy usage at existing tre~t~ent plants and pompi.ng stations amd implement cost­effective mc~sures to reduce dependence on off-site energy sources.

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3. Incorporate cost.:.e::ffective mE:,asures to reduce t:he u,se of outside enqrgy in 1design of treatment plant and pumpinb station im~rovements.

4. If sub-surface excavation ?:e:Vea:ls cultural or historrc material, ce1:-1se frll 1work in the immedi~te vicinity of the finds until a;: qualified archaeologist can make recommendg,t,i-1::>ri? ~or ~nsuri11g the integrity of the finds.

5. Incorporate mosqu~to control ~eatures in projett design,. constructton, and ope\rat:ip!l to the rea_sonable satisfaction of the Marin/Sotj:oma Mosquito AbatemenL Di:strict.

6. Develop and· implement a progl;,am to periodica'L~y monitor soil ~onditions c:ind n;rake adjus"Em~nts in water management practic~s as' -required .•

7. Maintain normal tidal movemernt to t_he marsh during construction. Avoid c;lamming cir blocking the entire slough unless a bypass ditcb is constructed. Manage construction so tzha.t damage j;s minimi-?ed. Make pro\Tisions in constrµction- speci·fications that all disturbed area:s be returned to original elevation and rev.egetated-.

8. Make provisions in ccnstruct~lon spectf±cati.ons that, after constrµct.ion 0£ t~h~ r.e-taining w;;i.11 c-.t the Tiburon ·trea.tmen£. p:haii'~, any exposed cut slopes shall be i:'es~e.ded by ·ijydromulching tl?ith species of the 90-(lst·al scrub community.: Califor.nia sagebrush, . ~yote bttsh, toyolt, bush monkey flower, and/or California p~ppy.

9. Limit project des~gn popu.lat:~ons to projections consistent ·with -the proposed" Bay Area· Air Quali:ty Non-Attainment Plan.

i 0. Adoption of .resolutions py pllanning agencies in' the project area agrceinE• to1 :i,mplement measures judg~d. to ha:v:e the ··eff~ct of .minimizing add,itional air pollut.ion as .communi:ty g;~owth occurs.

VI. :l.l .. TERNATIVES:

Two alternatives. were evaluated in- detail. The first was to abandon- the Mill Valley aind Trestle Glen plant·s~. Raw wastewater would be pumped t~ Central Marin for treat'm~mt and dl:-sposal with the ;Ross v.-1J.ey So,nitary District. -Sausulito and ;riburon ,,.,ould st.Sll impr:cye·

EXH!Bl.T "C" (Contimrnd)

and maintain their independent tr.eatment and dispos·a1 facilities. Th¢ second al~erna~ive involved mainCaintng the Sausalj:tQ at.d libuion pl~nts 1and improving -their out fa 11. The 1411.l Vall.cy ana Tres.~le G1en plant$ would also be imf'."r-oved. The local out·fa:;Lls from thes~ two plants now ,discharge to the .sh<J.lllow ~\Yatel::s of Richardson Bay. T~ese w6uld be abandoned and! a pLpeline consf:tµcted fron- Mi.LI Val1ey t:o Ti·buroq to cc:(rry treated wastewater. The waste . ..rater frqm Mill Valley, ·rrrestle Glen, and Ti b1.ir0n w.:iuld be discharged t-h1.0ol.lgh a common outfal,l to the de~-P wat:er 0£ Raccoon St.r~~t. TJ:ie first alternative was fourd to b!> l'Z percent less e:xpens-ive and avoided the risk of trt:n.'1sp9rting raw sew~:ge a long distan~·-9 and wa~ thus judged t~ be .more co;st-ef:fective.

VII. SHORT T£nM V. LONG TERM:

Short" tcr;n uses include cons'truction activities whtch wi 11 temporarily '.disrupt the ·natuxal env.ironment. OutfaJ 1 constructi.'.on w11.l re$ult in short term ·:qual:i-ty impacts. By providing signiticant imp'rcvemer.t in the qual.i ty of the St:.udy srea 1 ·S waste.water, ·the proposed· project is intended· to maf.nt~in a:nd e.nhance the ·environ­mental quality of ~he T~egion. Tri:s enhancemen~ i's sought as a long-te:r.m benefit ,to the area.